中文摘要：

现在的学习记录表面的可变性在用为时期 1961-2000 的车站观察的西北中国上的理智的热流动。这被发现下午和夜间理智的热流动变化显著地不同。在下午的立刻的流动的可变性比在夜间大得多。下午和夜间流动异例趋于相反。日报、季节理智的热流动变化的依赖是仔细与有关日报吝啬的地对空的温度的周期差别。有地对空的温度差别的理智的热流动的关系基于每日的平均数基于立刻的价值不同于那。现在的学习显示重要性让模型适当地模仿吝啬的地对空的温度差别并且它的日报、季节变化出现以便捕获在西北中国上的理智的热流动可变性并且在气候上预言它的嘴巧的影响。

英文摘要：

The present study documents the variability of surface sensible heat flux over Northwest China using station observations for the period 1961-2000. It is found that the afternoon and nighttime sensible heat flux variations are remarkably different. The variability of the instant flux in the afternoon is much larger than in the nighttime. The afternoon and nighttime flux anomalies tend to be opposite. The diurnal and seasonal dependence of sensible heat flux variations is closely related to the diurnal cycle of mean land-air temperature difference. The relationship of sensible heat flux with land-air temperature difference based on the instant value differs from that based on the daily mean. The present study indicates the importance for the models to properly simulate mean land-air temperature difference and its diurnal and seasonal variations in order to capture surface sensible heat flux variability over Northwest China and predicts its plausible impacts on climate.