Geography And Climate - about georgia

Georgia is situated in the South Caucasus, between latitudes 41° and 44° N, and longitudes 40° and 47° E, with an area of 67,900 km2 (26,216 sq mi). It is a very mountainous country. The Likhi Range divides the country into eastern and western halves.Historically, the western portion of Georgia was known as Colchis while the eastern plateau was called Iberia. Because of a complex geographic setting, mountains also isolate the northern region of Svaneti from the rest of Georgia.

The Greater Caucasus Mountain Range forms the northern border of Georgia. The main roads through the mountain range into Russian territory lead through the Roki Tunnel between Shida Kartli and North Ossetia and the Darial Gorge (in the Georgian region of Khevi). The Roki Tunnel was vital for the Russian military in the 2008 South Ossetia war because it is the only direct route through the Caucasus Mountains. The southern portion of the country is bounded by the Lesser Caucasus Mountains.[160] The Greater Caucasus Mountain Range is much higher in elevation than the Lesser Caucasus Mountains, with the highest peaks rising more than 5,000 meters (16,404 ft) above sea level.

The highest mountain in Georgia is Mount Shkhara at 5,068 meters (16,627 ft), and the second highest is Mount Janga (Dzhangi-Tau) at 5,059 m (16,598 ft) above sea level. Other prominent peaks include Mount Kazbek at 5,047 m (16,558 ft), Shota Rustaveli 4,860 m (15,945 ft), Tetnuldi 4,858 m (15,938 ft), Mt. Ushba 4,700 m (15,420 ft), and Ailama 4,547 m (14,918 ft). Out of the abovementioned peaks, only Kazbek is of volcanic origin. The region between Kazbek and Shkhara (a distance of about 200 km (124 mi) along the Main Caucasus Range) is dominated by numerous glaciers. Out of the 2,100 glaciers that exist in the Caucasus today, approximately 30% are located within Georgia.

The term Lesser Caucasus Mountains is often used to describe the mountainous (highland) areas of southern Georgia that are connected to the Greater Caucasus Mountain Range by the Likhi Range. The area can be split into two separate sub-regions; the Lesser Caucasus Mountains, which run parallel to the Greater Caucasus Range, and the Southern Georgia Volcanic Highland, which lies immediately to the south of the Lesser Caucasus Mountains.

The overall region can be characterized as being made up of various, interconnected mountain ranges (largely of volcanic origin) and plateaus that do not exceed 3,400 meters (11,155 ft) in elevation. Prominent features of the area include the Javakheti Volcanic Plateau, lakes, including Tabatskuri and Paravani, as well as mineral water and hot springs. Two major rivers in Georgia are the Rioni and the Mtkvari. The Southern Georgia Volcanic Highland is a young and unstable geologic region with high seismic activity and has experienced some of the most significant earthquakes that have been recorded in Georgia.

The Krubera Cave is the deepest known cave in the world. It is located in the Arabika Massif of the Gagra Range, in Abkhazia. In 2001, a Russian-Ukrainian team had set the world depth record for a cave at 1,710 meters (5,610 ft). In 2004, the penetrated depth was increased on each of three expeditions, when a Ukrainian team crossed the 2,000-meter (6,562 ft) mark for the first time in the history of speleology. In October 2005, an unexplored part was found by the CAVEX team, further increasing the known depth of the cave. This expedition confirmed the known depth of the cave at 2,140 meters (7,021 ft).

The landscape within the nation's boundaries is quite varied. Western Georgia's landscape ranges from low-land marsh-forests, swamps, and temperate rainforests to eternal snows and glaciers, while the eastern part of the country even contains a small segment of semi-arid plains. Forests cover around 40% of Georgia's territory while the alpine/subalpine zone accounts for roughly around 10 percent of the land.

Much of the natural habitat in the low-lying areas of western Georgia has disappeared during the past 100 years because of the agricultural development of the land and urbanization. The large majority of the forests that covered the Colchis plain are now virtually non-existent with the exception of the regions that are included in the national parks and reserves (e.g. Lake Paliastomi area). At present, the forest cover generally remains outside of the low-lying areas and is mainly located along the foothills and the mountains. Western Georgia's forests consist mainly of deciduous trees below 600 meters (1,969 ft) above sea level and contain species such as oak, hornbeam, beech, elm, ash, and chestnut. Evergreen species such as box may also be found in many areas. Ca. 1000 of all 4000 higher plants of Georgia are endemic in this country.

The west-central slopes of the Meskheti Range in Ajaria as well as several locations in Samegrelo and Abkhazia are covered by temperate rain forests. Between 600-1,000 metres (1,969-3,281 ft) above sea level, the deciduous forest becomes mixed with both broad-leaf and coniferous species making up the plant life. The zone is made up mainly of beech, spruce, and fir forests. From 1,500-1,800 metres (4,921-5,906 ft), the forest becomes largely coniferous. The tree line generally ends at around 1,800 metres (5,906 ft) and the alpine zone takes over, which in most areas, extends up to an elevation of 3,000 metres (9,843 ft) above sea level. The eternal snow and glacier zone lies above the 3,000 metre line.

Eastern Georgia's landscape (referring to the territory east of the Likhi Range) is considerably different from that of the west, although, much like the Colchis plain in the west, nearly all of the low-lying areas of eastern Georgia including the Mtkvari and Alazani River plains have been deforested for agricultural purposes. In addition, because of the region's relatively drier climate, some of the low-lying plains (especially in Kartli and south-eastern Kakheti) were never covered by forests in the first place.

The general landscape of eastern Georgia comprises numerous valleys and gorges that are separated by mountains. In contrast with western Georgia, nearly 85 percent of the forests of the region are deciduous. Coniferous forests only dominate in the Borjomi Gorge and in the extreme western areas. Out of the deciduous species of trees, beech, oak, and hornbeam dominate. Other deciduous species include several varieties of maple, aspen, ash, and hazelnut. The Upper Alazani River Valley contains yew forests.

At higher elevations above 1,000 metres (3,281 ft) above sea level (particularly in the Tusheti, Khevsureti, and Khevi regions), pine and birch forests dominate. In general, the forests in eastern Georgia occur between 500-2,000 metres (1,640-6,562 ft) above sea level, with the alpine zone extending from 2,000-2,300 to 3,000-3,500 metres (6,562-7,546 to 9,843-11,483 ft). The only remaining large, low-land forests remain in the Alazani Valley of Kakheti. The eternal snow and glacier zone lies above the 3,500-metre (11,483 ft) line in most areas of eastern Georgia.

The climate of Georgia is extremely diverse, considering the nation's small size. There are two main climatic zones, roughly corresponding to the eastern and western parts of the country. The Greater Caucasus Mountain Range plays an important role in moderating Georgia's climate and protects the nation from the penetration of colder air masses from the north. The Lesser Caucasus Mountains partially protect the region from the influence of dry and hot air masses from the south.

Much of western Georgia lies within the northern periphery of the humid subtropical zone with annual precipitation ranging from 1,000-4,000 mm (39.4-157.5 in). The precipitation tends to be uniformly distributed throughout the year, although the rainfall can be particularly heavy during the Autumn months. The climate of the region varies significantly with elevation and while much of the lowland areas of western Georgia are relatively warm throughout the year, the foothills and mountainous areas (including both the Greater and Lesser Caucasus Mountains) experience cool, wet summers and snowy winters (snow cover often exceeds 2 meters in many regions). Ajaria is the wettest region of the Caucasus, where the Mt. Mtirala rainforest, east of Kobuleti, receives around 4,500 mm (177.2 in) of precipitation per year.

Eastern Georgia has a transitional climate from humid subtropical to continental. The region's weather patterns are influenced both by dry Caspian air masses from the east and humid Black Sea air masses from the west. The penetration of humid air masses from the Black Sea is often blocked by mountain ranges (Likhi and Meskheti) that separate the eastern and western parts of the nation. Annual precipitation is considerably less than that of western Georgia and ranges from 400-1,600 mm (15.7-63.0 in).

The wettest periods generally occur during spring and autumn, while winter and summer months tend to be the driest. Much of eastern Georgia experiences hot summers (especially in the low-lying areas) and relatively cold winters. As in the western parts of the nation, elevation plays an important role in eastern Georgia where climatic conditions above 1,500 metres (4,921 ft) are considerably colder than in the low-lying areas. The regions that lie above 2,000 metres (6,562 ft) frequently experience frost even during the summer months.

Because of its high landscape diversity and low latitude, Georgia is home to about 1,000 species of vertebrates, (330 birds, 160 fish, 48 reptiles, and 11 amphibians). A number of large carnivores live in the forests, namely Brown bears, wolves, lynxes and Caucasian Leopards. The common pheasant (also known as the Colchian Pheasant) is an endemic bird of Georgia which has been widely introduced throughout the rest of the world as an important game bird. The species number of invertebrates is considered to be very high but data is distributed across a high number of publications. The spider checklist of Georgia, for example, includes 501 species.

Slightly more than 6,500 species of fungi, including lichen-forming species, have been recorded from Georgia, but this number is far from complete. The true total number of fungal species occurring in Georgia, including species not yet recorded, is likely to be far higher, given the generally accepted estimate that only about 7 percent of all fungi worldwide have so far been discovered. Although the amount of available information is still very small, a first effort has been made to estimate the number of fungal species endemic to Georgia, and 2595 species have been tentatively identified as possible endemics of the country. 1729 species of plants have been recorded from Georgia in association with fungi.The true number of plant species occurring in Georgia is likely to be substantially higher.


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