青藏高原地表净辐射若干重要特征研究
投稿时间:1989-10-07    点此下载全文
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作者单位
翁笃鸣 南京气象学院应用气象学系 
基金项目:气象科学基金项目
中文摘要:根据1979年5—8月及1982年8月-1983年7月的青藏高原考察资料,分析了高原地表净辐射随太阳高度、拔海高度以及云量、云状和下垫面状况变化的某些基本特征,着重讨论了净辐射廓线和冬季地表净辐射的符号问题。从实测资料和数值试验得出晴天条件下地表净辐射随拔海高度分布的抛物线特点,并论证了冬季积雪条件对高原地表净辐射的决定性作用,得出除长江黄河源区可能出现负值净辐射外,冬季高原主体部分地表净辐射仍维持正值的结论。
中文关键词:青藏高原  长波辐射  地表净辐射
 
SOME MAJOR FEATURES OF SURFACE NET RADIATION IN THE QINGHAI-XIZANG PLATEAU
Abstract:Based on survey data in the Qinghai-Xizang Plateau for theperiods of May-August 1979 and of August 1982-July 1983, inve-stigation is performed of some major features of the surface net radiation(SNR) varying versus the sun’s elevated angle, height above thc MSL,cloudiness, cloud forms and the condition of the underlying surface,with focus on the profile of the SNR and the sign of the winter SNR.The distribution pattern of the radiation as a function of elevation takes the form of parabola under the clear sky obtained from in-situobservations and numerical studies. Besides, discussion is made of thedecisive effect of the winter snow cover on the SNR, arriving at the conclusion that in winter the SNR remains positive in the main partof the Plateau apart from the sources of the Huanghe and Changjiang Rivers that are likely to be marked by negative values.
keywords:the Qinghai-Xizang Plateau  long-wave radiation  surface net radiation(SNR)
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