The largest saltwater lake in the world
Caspian Sea is an inland lake, located in the west of Central Asia, and the largest saltwater lake in the world. Located at the junction of Europe and Asia, the largest freshwater lake is Lake Superior. It is about 1, 200 kilometers long and 320 kilometers wide on average. There are Volga River, ural river, etc. 1, and more than 30 rivers flow into the sea. The Caspian Sea has an ecosystem similar to the ocean, and the shipping industry is developed. The Caspian Sea is geographically a sea-traced lake. It finally broke away from the Black Sea and became an inland lake, only 1. 1 ten thousand years ago.
The whole sea area can be divided into three parts: north, middle and south, separated by many islands and shoals. North Caspian Sea, with gentle bank slope; The middle Caspian sea floor, the eastern continental shelf, and the Gerbat basin in the west; The South Caspian Sea has a low coast, a wide east-west shelf and a depression in the west, which is the deepest part of the Caspian Sea and has a large amount of water. The total amount of water flowing into the Caspian Sea every year is 338.2 cubic kilometers, while the annual water consumption is 36 1.3 cubic kilometers. With less inflow and more outflow, there will be a "deficit" that cannot make ends meet, and the water level of the lake will inevitably decline gradually.
Climatic conditions of Caspian Sea
The northern part of the Caspian Sea is located in the temperate continental climate zone, while the whole central part of the Caspian Sea (and most of the southern sea areas) is located in the warm zone. Affected by the southwest subtropical climate, the east coast is dominated by desert climate, and the temperature is higher than that of the North Caspian Sea. This leads to a changeable climate. In winter, the atmospheric circulation is dominated by the cold Asian anticyclone, but it affects the azores high branch and the South Asian low-pressure center in summer. Violent storms are related to the north wind and southeast wind.
The sea area spans several different climatic zones. Although the North Caspian Sea has a continental climate, the change is not drastic. The middle Caspian Sea has a mild climate in the west and a dry desert climate in the east. The South Caspian Sea has a subtropical climate and is dry in summer. In winter, the weather in Caspian Sea is unstable and the temperature changes greatly. In summer, the sea is controlled by high pressure, and there is often a weak sea breeze blowing to the mainland, and the weather is very stable. The temperature has not changed much. The average temperature in the hottest month is 28-29℃, and the extreme maximum temperature can reach 44℃.
Reference to the above content: Baidu Encyclopedia-Caspian Sea