A parameterization for longwave surface radiation from sun-synchronous satellite data
A parameterization for longwave surface radiation from sun-synchronous satellite data
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DOI：
10.1175/1520-0442(1989)002
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发表时间：
1989-04
影响因子：
4.9
通讯作者：
Shashi K. Gupta
中科院分区：
文献类型：
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作者：
Shashi K. Gupta
摘要利用NOAA运行中的太阳同步卫星的气象资料，发展了一个用于计算地球表面向下、向上和净长波辐射的参数。该参数化是利用窄带辐射传输模式和由卫星和现场探测组成的大型气象数据库开发的。晴空向下通量表示为地面和较低对流层温度以及大气水汽负荷的函数。云对向下通量的贡献用云底温度和云下大气的水汽负荷来表示。向上通量直接由表面温度计算。用参数化得到的结果与一组独立的卫星和现场探测的详细辐射传输计算进行了验证。该参数化被应用于1982年4月热带太平洋大区域的卫星探测。
Abstract A parameterization has been developed for computing downward, upward, and net longwave radiation at the earth's surface using meteorological data from NOAA's operational sun-synchronous satellites. The parameterization was developed using a narrowband radiative transfer model and a large meteorological database consisting of satellite and in situ soundings. Clear-sky downward flux was represented as a function of surface and lower tropospheric temperatures and water vapor burden of the atmosphere. Cloud contribution to the downward flux was represented in terms of cloud base temperature and water vapor burden of the atmosphere below the cloud. Upward flux was computed directly from the surface temperature. Results obtained with the parameterization were verified against detailed radiative transfer computations for an independent set of satellite and in situ soundings. The parameterization was applied to satellite soundings for the month of April 1982 from a large region in the tropical Pacific Oc...