纳木错小湖和大湖湖气相互作用及其内部混合过程对比研究

青藏高原有数以万计的湖泊，湖泊-大气之间水分和热量通量的传输交换以及湖泊内部热量混合过程的观测和模拟研究对于量化湖泊在区域水循环和能量平衡中的作用、评估湖泊的区域气候效应意义重大。鉴于湖泊面积、大小和深度不同会引发湖表粗糙度、温度、湖内热量存储及热量混合过程的差异，本项目将基于青藏高原纳木错小湖和大湖宝贵的湖气相互作用与湖泊温度梯度观测资料，结合湖泊过程模型（Flake模型和CLM-LISSS模型）完成以下研究目标：（1）对比分析小湖和大湖湖面特征参数与湖气水热通量季节变化规律；（2）验证湖泊模型结果，优化湖泊模型参数，加深理解小湖和大湖湖泊热量混合机制的异同。研究项目的实施将揭示高海拔小湖和大湖湖泊过程的差异，为青藏高原湖泊过程的精确模拟奠定基础。

There are tens of thousands of lakes on the Tibetan Plateau, observation and simulation of lake-air moisture and heat flux transfer process and lake internal mixing regimes have significances in quantifying the role of lakes in regional water cycle and energy budget and in evaluating its regional climate effects. Due to the area and depth induced significant differences in surface roughness lengths, temperature, heat storage in the lake and mixing regimes, we will focus on the following objectives by combination of valuable observations (lake-atmosphere heat fluxes and lake temperature profiles) and models simulations (Flake model and CLM-LISSS model) over a small lake and a large lake in Nam Co basin: (1) comparative analysis of lake-atmosphere characteristic parameters and seasonal variations of moisture and heat flux over a small lake and a large lake; (2) validation of models simulations, optimization of model parameters and understanding the similarities and differences of lake mixing regimes of the two lakes. The successful implementation of the research plan will reveal the differences of lake process over high-altitude lakes and lay the foundation for precise lake simulations on the Tibetan Plateau.