青海湖表层水温变化特征及对气候变化的响应.

This paper identified the variation characteristic of surface water temperature as well as its response to climate change, and discussed its influence factors and circulation background. The results show that the surface water temperature during ice-free period of Qinghai Lake has been increasing significantly over the pasl few decades. The annual average increase rale is about 0.50 °C/10-year and the year 1986 is identified as the turning point of these variations. During the period from late 1960s to early 1990s, a significant oscillation period of 15-18 years is observed. However, from the early 1980s to the early 2000s, the period has decreased to 9 years. In general, the variations of surface water temperature are dominated by downward longwave radiation. Precipitation, near surface air specific humidity, and surface pressure are indictors of its variations. The surface water temperature during ice-free period is controlled by several atmospheric circulation factors, but correlated most to the local circulation factors. [ABSTRACT FROM AUTHOR]