The
Climate of Qinghai Lake
The weather in Qinghai Lake area is typically mild
semi-arid steppe climate. It’s cool in summer and cold in winter,
with strong sunshine and less rainfall.
1 sunshine
The annual daylight hours are more than 3000 in the lake area,
which is 700 hours more than the places east to the same latitude.
The annual total quantity of radiation is from 171.64 to 106.693
therm/square centimeter, which is higher than Huabei Plain and Huangtu
Plateau.
2 temperature
Every year, the average temperature is from 1.1℃ to0.3℃ in eastern
and southern lake area. In western and northern part, the average
temperature is from -0.8℃ to 0.6℃, with the highest from6.7℃~8.7℃
and lowest from -6.7℃~4.9℃ . The extreme temperature record is 25℃
and -33.4℃.
3 . Rainfall
In the lake area, the annual rainfall is relatively not enough,
which is a litter higher in eastern and southern part (412.8mm and
359.4mm), and in western and northern part the number is 360.4mm
and 324.5 mm. However, the evaporation (1502mm/year ) exceeds the
rainfall. The amount of rainfall is different in seasons, with largest
amount from May to Sep.
4 wind and sandstorm
In the lake area, the wind is quite strong, especially from Feb
and Apr. For example, in Gangcha, there are about 47.3 days with
strong winds annually, which is 5.9-9.3 days in Feb and Apr, 19
days in Mar. The sandstorms occur 14 days annually. In Buha River
estuary, the highest wind force reaches 9-10 grade. Because of high
altitude, the whole area suffers northwestern wind for most time.
5 water temperature
The water temperature in lake area is different in seasons. In
Aug, the highest is 22.3 ℃ and average is 16℃. In the lower gradient
in the lake, the average temperature is 9.5 ℃ and the lowest is
6 ℃. In winter, the surface lake temperature is -0.9℃ and lower
gradient temperature is 3.3℃. After the lake gets melting, the temperature
gradually rises.
6 ice
Since the middle of Nov, the lake gets frozen for 108-116 days.
The average thickness of ice is 40cm. Until the middle of Mar, the
ice begins to split and floats with wind force. The largest bulk
of ice is 10 cubic meter. After the middle of Apr, all the ice turns
into water.
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