| 晴天地表总辐射和净辐射瞬时值计算方法 |
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| 引用本文： | 孙治安,刘晶淼,曾宪宁,梁宏.晴天地表总辐射和净辐射瞬时值计算方法[J].气象与环境学报,2014,30(2):1-13. |
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| 作者姓名： | 孙治安 刘晶淼 曾宪宁 梁宏 |
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| 作者单位： | 1. 中国气象局大气环境研究所，沈阳， 110016; 2. Centre for Australian Weather and Climate Research, Australian Bureau of Meteorology, Melbourne 3001, Australia; 3. 中国气象局气象科学研究院，北京，100081; 4. 南京信息工程大学， 南京，210044 |
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| 基金项目： | 资助项目：中国气象局沈阳大气环境研究所基本科研业务经费项目和中国气象局气候变化专项（ccsf201313）共同资助. |
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| 摘 要： | 以较为精确的大气辐射传输模式为基础，研制出晴天地表总辐射和净辐射瞬时值的计算方案。与以往的经验计算方法不同，该方案将辐射传输带模式的思路引入地面太阳辐射计算，并尽可能将大气中吸收和散射物质对太阳辐射的影响考虑进去，从而使该方法具有较好的精确性和普适性。在此基础上采用了Kokhanovsky等人提出的大气气溶胶反射率和透过率参数化方案，使得气溶胶对地面总辐射和净辐射的影响得到较好的处理。采用的自变量都是数值预报模式或卫星观测能提供的气象要素，因此该方案即可用于数值预报模式或陆面过程模式计算地表辐射平衡,又可以利用卫星观测或再分析资料估算地面太阳能资源分布。利用美国能源部三个大气辐射观测站点2005年全年的观测资料及欧洲宇航局提供的卫星反演气溶胶资料对计算方案进行了检验。结果表明，该方法十分精确，所有点的平均相对误差都小于6%，误差的均方差都小于0.3 W?m-2。
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| 关 键 词： | 总辐射 辐射传输 透过率 辐射参数化 |
Estimation of global and net solar radiation at the Earth surface under clear-sky condition |
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| SUN Zhi-an,LIU Jing-miao,ZENG Xian-ning,LIANG Hong.Estimation of global and net solar radiation at the Earth surface under clear-sky condition[J].Journal of Meteorology and Environment,2014,30(2):1-13. |
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| Authors: | SUN Zhi-an LIU Jing-miao ZENG Xian-ning LIANG Hong |
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| Institution: | 1. Institute of Atmospheric Environment, China Meteorological Administration, Shenyang 110016, China; 2. Centre for Australian Weather and Climate Research, Australian Bureau of Meteorology, Melbourne, VIC. 3001, Australia; 3. Chinese Academy of Meteorological Sciences, Beijing 100081, China; 4. Nanjing University of Information and Technology Sciences, Nanjing 210044, China |
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| Abstract: | A scheme for estimating global and net solar radiation under clear-sky condition is developed based on an accurate radiation transfer model. Unlike previously used methods, this scheme utilises an idea of radiative band model in the calculations of solar radiation at the earth surface and includes as many atmospheric absorbing and scattering species as possible, which makes the scheme more accurate and globally applicable. The parameterization of aerosol scattering and transmittance proposed by Kokhanovsky et al. is adopted to consider the effects of aero- sols on the surface solar radiation. All variables used in the calculations are available in any numerical weather pre- diction models or they can be obtained from satellite measurements. Therefore, the scheme can be used in a numer- ical weather prediction model as well as a land-surface model for estimation of solar radiation distribution. The scheme has been tested using the US Atmospheric Radiation Measurements dataset and aerosol data retrieved by the European Space Agency satellites. The results indicate that the scheme is very accurate, the mean relative error is less than 6% .and the root mean sauare error is 0. 3 W·m-2 |
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| Keywords: | Global radiation Net solar radiation Radiative transfer Transmission Radiative parameterization |
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