Climatic conditions of the Caucasus. North Caucasus: nature and its description. Features of the nature of the Caucasus Ready-made works on a similar topic

The Caucasus cannot be attributed to one climatic region. To the north of the axial belt of the Greater Caucasus - a temperate climate, in Transcaucasia - subtropical. Within them there are differences due to the nature of the relief, position in relation to air currents, position relative to the Black and Caspian Seas, and local circulation.

The climate of the Caucasus is changing in three directions:

from west to east - in the direction of increasing continentality,

from north to south - in the direction of increasing amounts of radiative heat

in the altitudinal direction - an increase in precipitation and a decrease in temperatures.

Cloudiness plays a special role - with an increase in the mountains and in the western regions of the Caucasus, due to its increase, the annual values ​​of solar radiation are less than average.

In the summer months, the radiation balance in the Caucasus is close to tropical, local VMs transform into tropical ones.

Circulation: continental air of temperate latitudes dominates in the North Caucasus, subtropical in Transcaucasia. Alpine zones under the influence of western directions.

During the winter months the territory is located south of the "major axis"; areas of low pressure are formed over the Black and the south of the Caspian. The result is an outflow of dense cold masses of the "great axis" to the Caucasus. However, the mountain wall prevents penetration to the south, it is still possible to bypass along the coasts of the seas - "nords" and "boron". In the west, there is a lot of snow in the mountains. To the east, the influence of southwestern transport weakens and the influence of the Asian anticyclone intensifies, snowfall decreases. A local anticyclone forms over the Armenian Highlands in winter.

In summer time over Asia they form an area of ​​low pressure. The western currents of sea air of temperate latitudes from the North Atlantic are intensifying, which capture the Caucasus. They give up precipitation on windward slopes. In the second half, the Azorean maximum shifts to the north and often captures the Caucasus.

The role of foehns, mountain-valley winds and breezes, the formation of a center of low pressure over the Armenian Highlands is noticeable. Sea basins moderate the temperature.

In general, the southern slopes are characterized by higher (summer and winter) temperatures. The annual amount of precipitation increases with elevation to the mountains and decreases at all levels from west to east.

The Caucasus is located on the border of the temperate and subtropical zones. The influx of solar radiation is so significant that in the summer a local center for the formation of tropical air masses is created in Transcaucasia. The boundary of the temperate and subtropical belts runs along the axial part of the Greater Caucasus. Radiation balance 2300 MJ/m2/year (west) - 1800 (east) MJ/m2/year.

In winter, the continental air of temperate latitudes (CLA) spreads to Ciscaucasia from the Voeikov axis. East and northeast winds prevail. Cold air entering Ciscaucasia lingers on the northern slopes of the Greater Caucasus, not rising above 700-800 m. And only in the northwestern part of the Black Sea chain, where the height of the ridges is less than 1000 m, cold air crosses them. Over the water area of ​​the Black Sea in winter, low pressure is established, so cold heavy air rushes towards it at high speed, literally falling from the mountains. Strong cold winds arise, the so-called Novorossiysk bora. The air temperature during boron drops to -15 ... -20 ° С. Bora is observed in the Anapa-Tuapse section.

The upper parts of the mountains are located in the free atmosphere zone, where the prevailing role belongs to the western winds. In winter, the western transport dominates at an altitude of more than 1.5-2 km, and in summer - 3.5-4 km.

The formation of climatic conditions of the cold period is greatly influenced by cyclonic activity developing on the Mediterranean branch of the polar front. The trajectories of the Mediterranean cyclones are directed to the northeast of the Black Sea and cross the Caucasus in its western part. Their movement through the Caucasus leads to advection of tropical air, which causes intense thaws, snow cover, the occurrence of snow avalanches in the mountains and the formation of foehns on the northern slopes of the Greater Caucasus. With the development of hair dryers, the air temperature can rise to + 15 ... + 20 ° С. With an increase in the height of the mountains, the absolute maximum temperature in winter decreases and at the Elbrus station becomes negative (-2 ... -3 ° С).

Frequent advection of heat and the influence of the sea determine the positive average monthly air temperature on the Black Sea coast of the Caucasus. The average January temperature in Novorossiysk is +2°С, in Sochi +6.1°С. In Ciscaucasia, the average air temperature is -1…-2°С in the western regions, dropping to -4…-4.5°С in the center and rising again towards the Caspian Sea to -2…0°С. In the mountains, the temperature decreases with height, reaching -12 ... -14 ° C in the highlands, in the area of ​​\u200b\u200bperpetual snow and glaciers.

With breakthroughs of cold air masses from the north, the temperature in the Ciscaucasia can drop to -30 ... -36 ° С. Even in Anapa, the absolute minimum is -26°C, and in Sochi - -15°C.

The intensification of cyclonic activity in the cold season causes the winter maximum precipitation on the Black Sea coast of the Caucasus. In the rest of the territory, the maximum precipitation occurs in the summer.

In winter, snow cover sets in on the plains and in the mountains of the Caucasus. It first appears on the plains with relatively warm winters only in the second half of December. In some winters, stable snow cover does not form. Snow falls repeatedly during cooling and melts during thaws. The thickness of the snow cover on the plains is 10-15 cm. On the southwestern slopes of the Greater Caucasus Mountains (Achishkho), due to the abundance of winter precipitation and the decrease in the frequency of winter thaws, the snow thickness reaches 3-4 m. In the mountains of the eastern part of the Caucasus, it is reduced to 1 m (Myachkova N.A., 1983). The number of days with snow cover on the Stavropol Upland is 70-80, decreasing to the west and east of it to 50-40 and increasing in the mountains to 80-110 days due to the long cold period. On the lower border of the highland zone, snow lies 120 days a year.

In the Javakheti-Armenian Highlands, an area of ​​high pressure is formed at this time. From here, the cold continental air of Asia Minor (temperature -12°C) is taken out, penetrating into the middle part of the Riono-Kura corridor, but quickly transforming as it moves east. Colchis is filled with sea air masses of temperate latitudes, coming here with Mediterranean cyclones (t 4-6o). In winter, they constantly cross the Black Sea, where the pressure is low, and, as it were, fall into a trap between the B. and M. Caucasus ranges. The greatest amount of precipitation falls in late summer (August-September), as well as in late autumn - early winter. In other regions of the Caucasus, there is no precipitation at this time, with the exception of the Kuro-Araks lowland. Here, autumn-winter precipitation and partly spring precipitation are associated with a branch of the Iranian polar front, along the line of which cyclonic activity develops. It increases significantly on the slopes of Talysh and along the outskirts of this lowland.

In summer, the formation of the climate in the Caucasus is significantly affected by the frequency of humid Atlantic air masses and dry continental air masses that form over the spaces of the interior regions of Eurasia and come from the east. In connection with this, the importance of the submeridional climate division (the transverse uplift of the Stavropol Upland - the Central Caucasus) is enhanced. On the Black Sea coast of the Caucasus and in the Western Ciscaucasia, the air warms up to 22-23°C. In the highest parts of the Stavropol Upland and in the Mineralovodchesky region, the average temperature in July is 20-21°C. In the east of Ciscaucasia, the air warms up to 24-25°C. In the mountains, the air temperature decreases with height, reaching 10°C at an altitude of about 2500 m and 7°C at an altitude of 3000 m. At the Elbrus station (altitude 4250 m), the average July temperature is only 1.4°C.

In the first half of summer in Ciscaucasia, the influence of Atlantic cyclones, which determine the June maximum precipitation, increases. Later, the transformation of air masses over the southeast of the Russian Plain increases, therefore, already in the middle of summer, the amount of precipitation decreases, and conditions are often created for the formation of dry winds and droughts, the frequency of which increases in the east.

The annual amount of precipitation increases from the foothills to the mountains and with the rise up the slopes, but at the same time it noticeably decreases when moving from west to east. On the Kuban-Azov lowland, the annual amount of precipitation is 550-600 mm, on the Stavropol Upland it increases to 700-800 mm and decreases to 500-350 mm in the Eastern Ciscaucasia. On the Black Sea coast, the amount of precipitation increases rapidly from north to south (from 700 mm northwest of Novorossiysk to 1650 mm in the Sochi region). In the highlands of the western part of the Greater Caucasus, 2000-3000 mm of precipitation falls, and in the eastern part - only 1000-1500 mm. The amount of precipitation also decreases in the depression between the Rocky and Lateral Ranges, especially in the "shadow" of the Rocky Range, amounting to 650-700 mm. The largest annual amount of precipitation is observed on the windward southwestern slopes of the Greater Caucasus. At the Achishkho station, it is over 3700 mm per year. This is the largest amount of precipitation not only in the Caucasus, but throughout Russia.

Average annual precipitation: Colchis, the southern slope of the Western Caucasus - 1.5-2 thousand mm, Western and Middle Ciscaucasia 450-600 mm, Eastern Ciscaucasia, Terek-Kuma lowland -200-350 mm, Kuro-Araks lowland - 200-300 mm, Javakheti-Armenian highland 450-600 mm, Lankaran lowland - 1200 mm. It is warmest in summer in the Kuro-Araks lowland (26-28°C), in the rest of the territory 23-25°C, in the Javakheti-Armenian Highlands 18°C. However, temperature and precipitation are subject to change depending on the height of the mountains, forming altitudinal climatic zonality. So, the average annual temperature on the Black Sea coast is 12-14°С, in the foothills of the Caucasus it is 7-8°С, at an altitude of 2-3 thousand m -3-0°С. In summer, despite the increase in solar radiation with height, the temperature drops by an average of 0.5-0.6 ° C every 100 m, and by 0.3-0.4 ° C in winter. When climbing the mountains, the average annual positive temperature persists only up to a height of 2300-2500 m. On Elbrus it is -10°C. Similar regularities are preserved for average monthly air temperatures. Thus, the average temperature in January in the Ciscaucasia is -2-7 ° С, in the middle and high mountains - from -8 to -13°C; on Elbrus -19°С; in Novorossiysk 3°С, Sochi 5°С. In July, the temperature is 23-25°С everywhere, at an altitude of 2-2.5 thousand m -18°С, 4000 m -2°С.

The amount of precipitation also changes with altitude. If in the northeastern Ciscaucasia they fall less than 300 m, further to the west 300-400 mm, and in the Western Ciscaucasia 400-500 mm, then already in the low-mountain regions of Stavropol - Nalchik 500-800 mm, at the latitude and height of Vladikavkaz - 800-1000 m (1.5 thous.

Climate of the Caucasus

m), at an altitude of 2 thousand m, on average 1000-1500 mm; higher the amount of precipitation decreases: Terskol - (3050 m) - 930 mm.

The height of the snow line is 2800-3000 m, in the western part - 3200-3500 m, in the eastern part of the Greater and Lesser Caucasus glaciation is negligible - 3 square meters. km. On B.K. - 1420 km2, their total number is 2200. Of these, 70% is located on the northern slope, 30% - on the southern. Types of glaciers - mountain-valley (20% of the area), cirque and hanging. Glaciation centers - Elbrus, Kazbek, other peaks of the Central Caucasus in M.K. - Aragats, Zangezur ridge, Javakheti ridge. All glaciers are in retreat (10-20 m/year).

The climate and features of the relief of the Caucasus determine its modern glaciation. Within Russia, there are 1,498 glaciers in the Caucasus with a total glaciation area of ​​993.6 km2, which is 70% of the total number of glaciers and the glaciation area of ​​the Greater Caucasus. The sharp predominance of glaciers on the northern slope is due to orographic features, blizzard transport of snow by western winds beyond the barrier of the Dividing Range, and slightly less insolation than on the southern slope. The snow limit lies at 2800-3200 m in the western part of the Caucasus and rises to 3600-4000 m in the east.

The greatest glaciation is concentrated in the Central Caucasus. The largest massif of modern glaciation is the Elbrus glacial complex (area 122.6 km2). The two-headed Elbrus is covered with a firn-ice cap about 10 km in diameter, which feeds more than 50 glacial streams radially diverging from it. The largest complex valley glacier in the Caucasus is the Bezengi glacier (length 17.6 km, area 36.2 km2), located at the foot of the Bezengi Wall and feeding the Cherek-Bezengi River. It is followed by the Dykh-Su glaciers (length 13.3 km, area 34.0 km2) and Karaugom (length 13.3 km, area 26.6 km2).

In the Western Caucasus, due to the low height of the mountains, glaciation is small. Its largest areas are concentrated in the Kuban basin near the highest mountain peaks - Dombai-Ulgen, Pshish, etc. The glaciation of the Eastern Caucasus is less significant due to the great dryness of the climate and is mainly represented by small glaciers - cirque, hanging, caro-valley.

The total area of ​​glaciers is 1965 km2. Glaciation reaches its greatest development between Elbrus and Kazbek, from here it gradually decreases to the west and sharply to the east. The most common car and hanging. 20% - valley glaciers. Everyone regresses.

Climate of the North Caucasus

climate graph

The difference between the amount of precipitation, between the driest and wettest month is 29 mm. The change in temperature throughout the year is 25.9 °C. Helpful tips about reading the climate table: For each month, you will find data on precipitation (mm), average, maximum and minimum temperatures (in degrees Celsius and Fahrenheit). The meaning of the first line: (1) January (2) February (3) March (4) April (5) May, (6) June (7) July (8) August (9) September, (10) October (11) November (12) December.

Winter holidays in the Caucasus

The North Caucasus is a place where you can come in any season and enjoy various types of recreation in a relatively small area. Mountains, the sea, mineral springs, lakes and waterfalls - this is what the Caucasus can please a tourist. Winter and New Year holidays in this part of Russia have a special flavor. Moreover, the winter in the Caucasus is mild, pleasant, it is rarely very frosty and windy.

Ski holidays in the Caucasus

Winter is the best time for skiers. And rest in the Caucasus at this time is one of the best active holidays in Russia. The North Caucasus gives you the opportunity to choose slopes for every taste: a fashionable holiday in Krasnaya Polyana or a slightly more modest, but surrounded by beautiful landscapes, skiing in the Elbrus region or Dombai. In addition to skiing, you can go snowmobiling or cross-country skiing, or go horseback riding.

In the Sochi region, where an excellent infrastructure has been built for the Winter Olympics, tourists can enjoy not only mountain slopes, but also numerous entertainments, skating rinks and cinemas, clubs and restaurants. There are no problems with accommodation: you can book a hotel room, you can rent an apartment or a room from local residents. The only problem is the high cost and exceptional popularity of the Sochi ski slopes. If you want to spend the New Year holidays in this part of Russia, then you need to organize your vacation, especially booking a hotel, in the middle of autumn.

In the Elbrus region, as in Dombai, there are few entertainments besides direct skiing from the mountains. There are enough hotels here, but they are all small and private, so you also need to book them very early, and you should not expect exceptional service.

By the way, in the Caucasus Mountains you can relax in the winter, but do not go skiing: just settle in an alpine camp or in one of several high-mountain hotels and contemplate stunning views. Such a vacation will be saving for those who are tired of the constant flow of information and need solitude and the opportunity to reflect.

New Year holidays are held in the ski resorts of the Caucasus with fun thanks to entertainment programs. To celebrate the New Year on a mountain or on a slope means to get an unforgettable experience for a lifetime. But there is one caveat: prices for hotels, food and entertainment here soar by the end of December and remain very high throughout January.

Wellness winter holidays in the Caucasus

Caucasian Mineralnye Vody is perhaps the best place in the European part of Russia where you can spend the New Year holidays with maximum health benefits. Numerous resorts provide the full range of their usual services, while each of them tries to make a good entertainment program for the whole weekend. A calm and unhurried vacation in the health resorts of the Caucasus may seem boring, but in winter the healing effect is complemented by magnificent winter landscapes and crystal clear air.

Living in Kislovodsk or Pyatigorsk gives you the opportunity to plunge into the interesting history of these cities, to visit places associated with the names of great Russian writers and public figures.

A wellness holiday in the Caucasus is a wonderful option for a winter family holiday in Russia.

Hiking and car tours in the Caucasus

The Caucasus abounds in hiking trails and they are accessible all year round. As a rule, simple trekking routes are built in such a way that people walking along them can see the maximum beauty with minimal effort. There are such trails both in cities and in remote mountainous areas, so each tourist will choose a route, focusing on the capabilities of his body. For example, you can leisurely spend the whole day in Kislovodsk, walking in the famous Resort Park on the mountain, which offers an amazing view of Elbrus.

Tours to the Chegem waterfalls in Kabardino-Balkaria are extremely popular in winter. The legendary waterfalls of the Chegem Gorge fascinate with their beauty at any time of the year, but in winter they are especially impressive. Frozen water forms pillars of ice, more like giant candles. Excursions to the mountain lakes of Karachay-Cherkessia and Kabardino-Balkaria are also very popular among tourists. However, it is advisable to make trips to the mountain beauties, accompanied by experienced guides.

Combined tours

Combined tours in the North Caucasus are suitable for lovers of outdoor activities; they are offered by many travel agencies. As a rule, these tours include visits to major cities and a short trip to the sights in the mountains. So, you can visit important historical and cultural places of Kislovodsk and "visit" Elbrus in 6-7 days. The most daring can include climbing Elbrus in their tour.

Horse trips are very popular; they are organized in almost every Caucasian republic of Russia. Also interesting are safari tours, during which you can visit several beautiful places at once on off-road vehicles in a few days. This is the best New Year's holiday for collectors of impressions who want to see as many unique corners of the Caucasus as possible at one time.

The Caucasus is one of the southern regions of Russia. Its extreme points lie within 50.5 ° N. sh. (northern extremity of the Rostov region) and from the village. sh. (on the border of Dagestan). The territory of the North Caucasus receives a lot of solar radiation - approximately one and a half times more than, for example, the Moscow region. Its annual amount for the plains and foothill regions is 120-140 large calories (kilocalories) per square centimeter of surface.

In different seasons of the year, the radiation flux is different. In summer, each square centimeter of the surface receives 17-18 kcal per month. At this time, the heat balance is positive. In winter, the flow of sunlight is sharply reduced - up to 3-b kcal per 1 sq. km. cm per month and a lot of heat reflects the snow-covered earth's surface. Therefore, the radiation balance becomes negative for some time in the middle of winter.

In the North Caucasus, everywhere, with the exception of the highlands, there is a lot of heat. On the plains, the average temperatures in July everywhere exceed 20°, and summer lasts from 4.5 to 5.5 months. Average January temperatures fluctuate in different regions from -10° to +6°, and winter lasts only two or three months. The rest of the year is occupied by transitional seasons - spring and autumn.

Due to the abundance of heat and light, vegetation in the Caucasus has the opportunity to develop in the northern parts of the region for seven months, in Ciscaucasia - eight months, and on the Black Sea coast, south of Gelendzhik - up to 11 months. This means that with an appropriate selection of field and garden crops, one can get one and a half crops a year * in the north of the region, and even two crops in the entire Ciscaucasia.

The movement of air masses and their transformation in the territory of the North Caucasus are exceptionally complex and diverse. The area is located on the border of temperate and subtropical latitudes, not far from the warm Mediterranean Sea. As far north as the Arctic Ocean, there are no significant orographic obstacles. In the south, on the contrary, high chains of mountains rise. Therefore, in all seasons of the year, various air masses can penetrate the North Caucasus: either the cold dry air of the Arctic, or the moisture-saturated masses formed over the Atlantic Ocean, then the humid tropical air of the Mediterranean, and, finally, although very rarely, also tropical, but dry and heavily dusty air from the desert highlands of Western Asia and the Middle East. Replacing each other, various air masses create a great diversity and variety of weather conditions, which distinguish the North Caucasus. But the main amount of precipitation is associated with westerly winds that carry moisture from the Atlantic. Their moisture is intercepted by the slopes of mountains and hills facing to the west, while to the east the dryness and continentality of the climate increases, which affects the entire landscape.

The nature of the circulation of air masses in different seasons of the year has noticeable differences. And, of course, the conditions of the plains and mountains are sharply different.

On the plains in winter, the cold dense air of Siberia and Kazakhstan (the Siberian, or Asian, anticyclone) collides with each other and the relatively warm rarefied air that sets over the Black Sea (the Black Sea depression). Under the influence of the Siberian anticyclone, streams of dry, strongly cooled air are constantly directed towards Ciscaucasia. Due to the significant difference in pressure, the air flows quickly, forming strong, often stormy easterly and northeasterly winds. These winds dominate throughout the winter in the Caspian region and in the eastern parts of Ciscaucasia. Due to the dryness of the air they bring, there is almost no precipitation here, and the thickness of the snow cover is small - 5-10 cm, in some places there is no snow at all.

Further to the west, the air of the Siberian anticyclone rarely penetrates. The entire Western Ciscaucasia is under the influence of the Black Sea depression: cyclones come from there, bringing sharp warming and a lot of precipitation. The snow cover in the west is 2-3 times thicker than in the east, the winter is unstable: frequent thaws sometimes last for a week or more, with temperatures rising to 6-12° in the north and up to 20° in the south of the region.

The Stavropol Upland is a kind of climatic boundary between the Eastern and Western Ciscaucasia. Here, air masses that are very heterogeneous in their physical properties meet each other. In this case, the winds usually increase sharply; the variable wind regime is the main feature of winter in the Stavropol Territory.

Arctic air usually comes to the North Caucasus from the northwest. In the Lower Don and Ciscaucasia, this cold air, as a rule, is delayed for a long time by the dense air of the Siberian anticyclone and mountain ranges. Then, it would seem that low temperatures are not at all characteristic of these southern places. Thus, in Pyatigorsk and Maykop, the absolute minimums, that is, the lowest of the observed temperatures, are -30°, and in Krasnodar even -33°. The average lows are also quite severe: -16°, -20°.

The cold Arctic air, as if pressed against the ground, usually does not rise high and does not cross the mountain ranges that protect the Transcaucasus from the destructive northern cold. But cold invasions can bypass the Caucasus Mountains along their eastern margin along the Caspian coast, reaching Baku and its environs, often having a detrimental effect on the coastal regions of Dagestan along the way.

In the west, on a small section of the coast from Novorossiysk to Gelendzhik, where the mountain range is low, cold and dense air accumulating in the foothills sometimes rises to the saddle of the Markotkhsky pass. Then a bora falls on the city of Novorossiysk and the Tsemess Bay, in the local north-east - a wind of hurricane strength and speed, and also extremely cold. It often brings serious destruction to the urban economy and causes severe storms in the coastal parts of the sea.

In the spring, air masses heated from the earth's surface rush upwards and the pressure weakens. Then conditions are created for the active invasion of warm Mediterranean air. Under its influence, the unstable snow cover melts together, the average daily temperatures rise rapidly, and already in early May, summer conditions are established throughout the entire territory of the North Caucasus, except for the highlands.

In summer, the incoming air is actively transformed under the influence of a strongly heated earth's surface, and its own air, close to the tropical type, is formed on the territory of the region. On the plains everywhere, often for many weeks, an anticyclone sets in with its characteristic weather features: hot days prevail, with weak winds, low clouds and strong warming of the surface layers of air, almost without rain.

Only from time to time anticyclonic conditions are replaced by periods of passage of cyclones. They usually invade from the Atlantic through Western Europe, Belarus and Ukraine, and much less frequently from the Black Sea. Cyclones bring cloudy weather: heavy rains fall on their leading fronts, often accompanied by thunderstorms. Occasionally, long drizzling rains fall in the rear of passing cyclones.

Cyclones almost always come from the west or northwest, and as they move east and southeast, the air masses they bring lose their moisture reserves. Therefore, not only in winter, but also in summer, the western plain Ciscaucasia is more abundantly moistened than the eastern one. In the west, the annual precipitation is 380-520 mm, while in the Caspian region it is only 220-250 mm. True, in the foothills and on the Stavropol Upland, precipitation increases to 600-650 mm, but on the plains east of the upland, it is not enough to make full use of the abundance of solar heat in agriculture and horticulture. The situation is further complicated by the extreme unevenness of precipitation over time.

In fact, the entire territory of the Lower Don and the plain Ciscaucasia is not guaranteed against the possibility of droughts with their constant companions - dry winds - a cruel, inexorable enemy of field and horticultural plants. However, not all areas are equally prone to these formidable natural phenomena. So, for the period from 1883 to 1946, that is, for 64 years, droughts occurred 21 times in the Caspian region, 15 times in the Rostov region, and only 5 times in the Kuban.

During droughts and dry winds, especially in the east, dusty or black storms often occur. They occur when the upper layers of dry soil, still loosely held together by newly emerged plants, are blown away by strong winds. A cloud of dust rises into the air, covering the sky with a thick veil. Sometimes the dusty cloud is so dense that the sun barely shines through it and appears as a hazy, blood-red disk.

Measures of protection against black storms are known. The main ones are properly planned forest shelterbelts and high agricultural technology. Much has already been done in this direction. However, until now, in the fields of Ciscaucasia, it is often necessary to re-sow (re-sow) several tens of thousands of hectares, from which the most fertile soil layer is demolished during dust storms.

In autumn, the influx of solar heat weakens. Initially, the features of the summer circulation are still preserved. Anticyclonic weather prevails with a weak movement of air masses. Subsequently, the earth's surface begins to noticeably cool, and from it the lower layers of air. In the mornings, thick milky-white fogs spread over the ground that has cooled overnight. The already strongly cooled air of the Siberian anticyclone comes more and more often, and in November a winter type of circulation is established over the entire territory of the North Caucasus.

The climate of the mountainous territories of the North Caucasus (from 800-900 m and above) is very different from the adjacent plains, although it repeats some of the most common features.

One of the main differences is that the mountain slopes, delaying the flow of air masses, make them rise up. At the same time, the temperature of the air mass decreases rapidly, and moisture saturation increases, which leads to precipitation. Therefore, the mountain slopes are much better moistened: in the mountains of the Western Caucasus at altitudes above 2000 m, 2500-2600 mm falls annually; to the east their number decreases to 900-1000 mm. The lower zone of the mountains - from 1000 to 2000 m - receives less precipitation, but still enough for the growth of lush forest vegetation.

Another difference is due to the decrease in temperature with increasing altitude: for every 100 m you rise, it drops by about 0.5-0.6°. In this regard, a belt distribution of climate is clearly manifested on the mountain slopes, and already at an altitude of 2700 m on the northern slopes of the mountains of the Western Caucasus, 3700-3800 m in the Central and 3500 m in the Eastern, there is a snow line, or the border of "eternal" snow. Above it, the warm season with positive temperatures lasts no more than 2.5-3 months, and at altitudes above 4000 m, even in July, positive temperatures are observed very rarely.

Due to the abundance of precipitation in the mountains of the Western Caucasus during the winter, 4–5 and snow accumulates, and in the mountain valleys, where it is blown away by the wind, up to 10–12 m. even a sharp sound, so that a thousand-ton mass of accumulated snow, breaking off a steep ledge, flew down with a terrible roar, destroying everything in its path. In the mountains of the Eastern Caucasus, due to the general dryness, the snow cover is much less.

The third difference between the mountain climate is that the chilled air of the highlands often seems to rush down the comparatively narrow intermountain valleys. For every 100 m lowered, the air heats up by about 1°. Falling from a height of 2500 m, when it reaches the lower parts of the mountains and foothills, it heats up by 25 °, that is, instead of cold, it will become warm and even hot. Such winds are called foehns. They blow at all times of the year, but they happen especially often in the spring, when the intensity of the general circulation of air masses sharply increases.

Finally, another important distinguishing feature of the climate of the mountains is its amazing diversity from place to place, which is due to the rugged relief with numerous bends of the slopes, differently oriented with respect to the illumination of the sun and the directions of the prevailing winds. On the plains, differences in the orientation of the slopes are less pronounced due to their low steepness.

For all the importance of each of the noted features of the climate of the mountains, the height, which determines the vertical division into climatic zones, is still of leading importance.

The climate of the Caucasus is very diverse, which is primarily due to the influence of the relief.

The Caucasus is located on the border of the temperate and subtropical climatic zones. The differences between them are intensified by the mountains of the Greater Caucasus, which hinder the transfer of cold air masses from the north to Transcaucasia and warm ones from the south to Ciscaucasia. The North Caucasus belongs to the temperate zone, Transcaucasia - to the subtropical. The differences between them are especially noticeable in air temperature.In the North Caucasus, everywhere, with the exception of the highlands, there is a lot of heat. On the plains, the average temperatures in July everywhere exceed 20°, and summer lasts from 4.5 to 5.5 months. The average January temperatures fluctuate in different areas from -10° to +6°, and winter lasts only two to three months. The rest of the year is occupied by transitional seasons - spring and autumn.

In the Greater Caucasus, starting from a height of about 2000 m, and in the Transcaucasian Highlands, the role belongs to the western air transport, in connection with which the influence of the Atlantic and the Mediterranean Sea increases. Therefore, the climate is more humid in the highlands.

The complex mountainous relief creates a wide variety of local climates in the Caucasus, and the previously outlined large geomorphoslogical units differ in climatic terms.

The diversity of the climate of the Caucasus determines the differences in the agricultural use of its territory. The economic importance of the Transcaucasian subtropical regions, protected by the Greater Caucasus mountain barrier, is especially great, where a whole range of varieties of subtropical climate is observed, ranging from humid, which allows the cultivation of tea and citrus fruits, to dry, suitable for growing cotton and other crops that require an abundance of sunlight.

The climatic features of the Greater Caucasus are determined by the altitudinal zonality and the rotation of the mountain barrier formed by it at a certain angle to the western moisture-bearing air flows - the Atlantic cyclones and the Mediterranean western air currents of the middle layers of the troposphere. This rotation has a decisive influence on the distribution of precipitation.

The wettest is the western part of the southern slope, where more than 2500 mm of precipitation falls annually in the highlands. The record amount of precipitation falls on the Achishkho ridge near Krasnaya Polyana - 3200 mm per year, this is the wettest place in Russia. Winter snow cover in the area of ​​the meteorological station Achishkho reaches 5-7 meters!

In the east of the Central Caucasus in the highlands falls up to 1500 mm per year, and on the southern slope of the Eastern Caucasus only 800-600 mm per year.

By the nature of the air masses, the southern slope of the Greater Caucasus belongs to the subtropical zone, the border of which with the temperate zone is emphasized by the barrier of the highlands. The west of the lower part of the southern slope has a humid subtropical climate, while the east has a semi-dry climate. The northern slope of the Greater Caucasus is generally drier than the southern one.

In the mountains of the Greater Caucasus, on a relatively small area, there is a wide range of climatic zones with pronounced zonality in height: humid subtropics of the Black Sea coast; continental dry (in the east to semi-desert) climate with hot summers and short but cold winters; precipitation (especially in the western part) and snowy winters (in the Krasnaya Polyana area, on the watershed of the Bzyb and Chkhalta rivers, the snow cover reaches 5 m and even 8 m). In the zone of alpine meadows, the climate is cold and humid, winter lasts up to 7 months, the average temperatures of August - the warmest month - range from 0 to 10 ° C. Above is the so-called nival belt, where the average temperature of even the warmest month does not exceed 0 °. Precipitation here falls mainly in the form of snow or grains (hail).

The average January temperatures at the foot of the mountains are -5°С in the north and from 3° to 6°С in the south at an altitude of 2000 m -7-8°С, at an altitude of 3000 m -12°С, at an altitude of 4000 m -17°С . The average July temperatures at the foot of the mountains in the west are 24°С, in the east up to 29°С at an altitude of 2000 m 14°С, at an altitude of 3000 m 8°С, at an altitude of 4000 m 2°С.

In the Greater Caucasus, the height of the snow line, rising from west to east, ranges from 2700 m - 3900 m above sea level. Its northern mark is different for the northern and southern slopes. In the Western Caucasus, these are 3010 and 2090 m, respectively, in the Central - 3360 and 3560 m, in the East - 3700 and 3800 m. The total area of ​​modern glaciation of the Greater Caucasus is 1780 km¤. The number of glaciers is 2047, their tongues descend to absolute levels: 2300-2700 m (Western Caucasus), 1950-2400 m (Central Caucasus), 2400-3200 m (Eastern Caucasus). Most of the glaciation occurs on the north side of the GKH. The distribution of the glaciation area is as follows: Western Caucasus - 282 and 163 sq. km Central Caucasus - 835 and 385 sq. km East Caucasus - 114 and 1 sq. km, respectively.

Caucasian glaciers are distinguished by a variety of forms. Here you can see grandiose icefalls with seracs, ice grottoes, tables, mills, deep cracks. Glaciers carry out a large amount of detrital material that accumulates in the form of various moraines on the sides and at the tongue of glaciers.

The climatic region of the natural region of the Caucasus is different: Ciscaucasia occupies a temperate climate region, and Transcaucasia is subtropical. Climatic regions are different because of different topography, air currents, local circulation. Changes in climatic conditions in the Caucasus occur in three directions. From the western part of the Caucasus towards the east, the continentality of the climate increases. The total solar radiation increases from north to south. The higher the mountains, the lower the temperature and the more precipitation. In the North Caucasus, solar radiation is 1.5 times more than in the Moscow region, per 1 cm2 per year. surface 120-140 kC. Depending on the season, the radiation flux is different: in summer the heat balance is positive, and in winter it is negative, since a certain percentage of radiation is reflected by the snow cover. Summer is long. The fluctuation of temperatures in July on the plains is more than +20 degrees. In January, the temperature ranges from -10 to +6 degrees Celsius.

In the north of the Caucasus, the continental air of temperate latitudes dominates. Transcaucasia is a zone of subtropical air masses. The north is devoid of orographic obstacles, and the south has high mountains, so during the year various air masses penetrate here - cold Arctic air, humid air of the Mediterranean tropics, Atlantic humid air masses or dry and dusty Asiatic and Middle Eastern air. In the Ciscaucasia, winter is dominated mainly by continental air from temperate latitudes. In winter, low pressure areas form over the Black and Caspian Seas, so strong cold winds appear. The Asian anticyclone is moving to the east, which reduces the amount of snow. In winter, a local anticyclone is formed over the Armenian Highlands. In the Ciscaucasia, the temperature drops to 30-36 with a minus mark due to the cold northern air. The minimum temperature in Anapa is 260C, in Sochi - 150C.

In the cold season, the influence of cyclones on the Black Sea coast increases, so the amount of precipitation during this period is the largest. In the rest of the territory, the maximum precipitation is observed in the summer. In winter, snow falls in the mountains of the Caucasus and on the plains. There are snowless winters. The thickness of the snow cover on the plains is from 10 to 15 cm. The southwestern slopes of the Greater Caucasus are covered with a 3-4 meter snow blanket. The summer climate of the Caucasus is formed mainly by humid air from the Atlantic and dry continental air. The air temperature of the Western Ciscaucasia and the Black Sea coast reaches + 22, +23 degrees, the eastern Ciscaucasia reaches +24, + 25 degrees. There is a noticeable drop in temperature with height. On Elbrus, the average thermometer is only +1.4 degrees.

In Ciscaucasia, Atlantic cyclones bring the maximum amount of precipitation in the first half of summer. In the middle of summer, air masses transform over the southeast of the East European Plain, which leads to a decrease in precipitation and the formation of dry winds with droughts. Rising from the foothills to the mountains, the amount of precipitation increases, but in the eastern part it decreases significantly. The annual indicator of the Kuban-Azov lowland reaches 550-600 mm of precipitation. If we consider the Sochi region, then the figure will be equal to 1650 mm. In the west of the Greater Caucasus mountains, on average, 2000-3000 mm of precipitation falls, and in the eastern region the figure is 1000-1500 mm. The greatest amount of precipitation was noted on the windward slopes of the Greater Caucasus from the southwestern side. For example, at the Achishkho station, the largest amount of precipitation falls not only in the Caucasus region, but also in all of Russia taken together. This figure reaches more than 3700 mm per year.

The modern glaciation of the Caucasus is associated with its climate and relief features. There are 1498 glaciers in the Russian Caucasus, which is 70% of the total number of glaciers, as well as the glaciation area of ​​the Greater Caucasus.

Rivers of the Caucasus

The mountains of the Caucasus collect a large amount of moisture. These are rains, snow, glaciers. It is in the mountains that the sources of all Caucasian rivers are located. Through the flat territories of Ciscaucasia, the waters of the rivers enter the Black, Azov and Caspian Seas. Mostly mountain rivers with a rapid current. There are also lowland rivers in the Caucasus, which have a slow flow and a small flood. The Stavropol Upland is the starting point for part of the lowland rivers. In summer, they dry up, forming a kind of chain of lakes. The upper reaches of the rivers Kuban, Kuma, Rioni, Terek, Kura, Araks are located in the mountains, and the lower reaches are on the plains. These rivers are fed by rain and groundwater. Downpours feed the rivers located between Tuapse and Sochi, turning them into swift streams. When there is no rain, rivers turn into streams. The sources of the mountain rivers Bzyb, Kodor, Inguri are located at an altitude of 2 to 3 thousand meters. Sulak and Terek flow at high speed through deep canyon-like gorges. These rivers have rapids and waterfalls.

The density of the river network of valleys is uneven and reaches only 0.05 km/sq. km. The southern slope of the mountain system has a dense river network. The rivers of the Caucasus, especially in Dagestan, are muddy, as rocks are washed out, as well as various sediments. The most muddy waters of the Kura and Terek rivers. The Kuban, Kagalnik, Western Manych, Chelbas and Beisug flow into the Black Sea. The rivers of the Caspian Sea basin are Samur, Terek, Sulak, East Manych, Kuma and Kalaus.

The Caucasian rivers have an insignificant transport function. The Kura, Rioni, Kuban can be attributed to the category of navigable. They use rivers for the purpose of irrigating territories, and it is also convenient to float timber along them. There are hydroelectric power stations on many Caucasian rivers.

Lakes of the Caucasus

There are few lakes in the Caucasus. The total number is about 2 thousand. The area of ​​lakes is small. An exception can be considered the mountain lake Sevan, the height of the water surface of which is 1916 m, and the greatest depth is 99 m. The area and depth of the lake have slightly decreased due to the construction of a hydroelectric power station on it. This factor affected not only the lake, but also the nature of the adjacent territory. Some species of animals have disappeared, the number of fish has decreased, and bare peat bogs have formed on the ground.

The plains of the coasts of the Azov and Caspian Seas contain lagoonal and estuary lakes. Manych lakes formed a whole system. Certain lakes in this system sometimes dry up during the summer.

The foothills and lower slopes of lakes do not have, but there are many of them in the mountains. The basins of mountain lakes are different in origin. Most of them are tectonic, but there are also karst, volcanic and cirque. Lakes of volcanic origin are marked by damming. River basin Teberdy is famous for its lakes of glacial origin that have survived to this day. The floodplains of flat rivers are decorated with original lakes. For example, such is the dammed lake Ritsa, located in the mountains.