Study on surface fluxes of Lake Kasumigaura: horizontal distribution of lake evaporation

已在鹿儿湖中心测量了地表通量。在中高风速范围内，bu；k系数与文献报道的一致。但在弱风速范围内，体积动量系数随风速的减小而增大。年蒸发量(E)的水平分布由地表温度、风速和湿度的水平分布确定，而地表温度、风速和湿度的水平分布则是由Kasumigaura湖及其周围的气象资料估算的。结果表明，E值在湖心最大，向海岸线方向较小。这是由于中心的风势较强所致。

Surface fluxes have been measured at the center of Lake Kasumigaura. The bu;k coefficients were in agreement with those reported in the literature under mid- to high wind speed ranges. However, in the weak wind speed range, bulk coefficient of momentum was found to increase as the wind speed decreased. Horizontal distribution of annual evaporation (E) was determined with that of surface temperature, wind and humidity data estimated with meteorology data in and around Lake Kasumigaura. It was found that E was the largest at Lake center, with smaller values toward the coastal lines. This was due to the stronger wind regime at the center.