围绕夏季青藏高原湖泊群区域气候效应及作用机理问题, 针对高原湖泊地处高寒干旱区且以盐湖为主的特点, 在一维湖模式中建立盐度影响的参数化并根据真实情况校正影响湖-气水分和能量通量计算的关键参数, 提高湖模式在青藏高原地区的适用性, 通过耦合湖模式建立适合青藏高原湖-气相互作用模拟的高分辨率区域气候模式,在此基础上采用数值方法研究夏季青藏高原湖-气通量交换特征及其区域性差异, 分析湖泊群水体对高原地表热力状况和蒸发的影响程度及其时间演变规律, 揭示高原湖泊群区域气候效应的影响范围、强度及其时间演变等基本特征并探讨内在的物理机制,加深对夏季青藏高原湖泊群区域气候效应及其产生机制的认识和理解,为提高我国天气气候的预测水平提供科学依据。

Focusing on the regional climactic effect of the lake clusters in Tibetan Plateau and its working mechanism in summer, to improve the applicability of lake model in simulating the lakes in Tibetan Plateau, firstly the parameterization of salt impact will be set up and key parameters related to the calculation of water and energy fluexs at air-lake interface are corrected in one dimensional lake model according to the fact that the most lakes in Tibetan Plateau are saline lakes and under the alpine arid climatic condition. Then an air-lake coupled regional climate model will be developed to reasonably simulate the air-lake interaction and regional climatic effects of the lake clusters over Tibetan Plateau by coupling the improved lake model. In this project, we will numerically study the the features of heat and water exchanges at the air-lake interface and their regional differences, and reveal the temporal variation of the impact of the lake clusters on the surface thermal situation and evaporation over the Tibetan Plateau in summer. Furthermore, the intensity and scope of the regional climatic effects of the lake clusters and their temporal variation in summer will be deeply analyzed. From this study, we will concentrate on indicating how the lake clusters in Tibetan Plateau affect the regional climate to reveal the intrinsic physical mechanisms in summer and provide necessary references for further improvements of the weather and climate predictions.