| 内蒙古草原光合有效辐射的计算方法 |
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| 引用本文： | 白建辉,王庚辰.内蒙古草原光合有效辐射的计算方法[J].环境科学研究,2004,17(6):15-18. |
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| 作者姓名： | 白建辉 王庚辰 |
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| 作者单位： | 中国科学院,大气物理研究所,中层大气与全球环境探测开放实验室,北京,100029 |
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| 基金项目： | 国家自然科学基金资助项目(40175031) |
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| 摘 要： | 2002年夏季,对内蒙古草原太阳分光辐射以及气象因素进行了同步观测。依据一定的物理基础,在对实测资料进行分析的基础上,计算得到了内蒙古草原地区光合有效辐射某一时段累计值的经验公式。实际天气条件下,计算结果与观测值比较接近,该经验公式的适用性亦比较好。根据不同条件,可以选择不同的因子来计算光合有效辐射。当选择全部因子时,计算值与观测值的最大相对偏差为8 13%,平均相对偏差为2 45%。研究表明,大气中所有物质对光合有效辐射的吸收作用小于它们的散射作用。
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| 关 键 词： | 太阳辐射 光合有效辐射 计算方法 云 |
| 文章编号： | 1001-6929(2004)06-0015-04 |
| 收稿时间： | 2003/12/4 0:00:00 |
The Calculating Method of Photosynthetically Active Radiation in the Inner Mongolia Grassland |
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| BAI Jian-hui and WANG Geng-chen.The Calculating Method of Photosynthetically Active Radiation in the Inner Mongolia Grassland[J].Research of Environmental Sciences,2004,17(6):15-18. |
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| Authors: | BAI Jian-hui and WANG Geng-chen |
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| Affiliation: | Laboratory for Middle Atmosphere Layer and Globe Environmental Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing100029, China |
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| Abstract: | During the summer season of 2002, the observation about solar spectral radiation and meteorological parameters were measured. On the basis of physical principles and analysis of observational data, an empirical model was established for calculating the sums of photosynthetically active radiation (PAR) during a period of time. The results showed that the calculated values agree well with that observed, and the applicability of empirical model was good in actual sky conditions. According to the different conditions, different affecting factors can be selected into calculations of PAR. When all affecting factors are selected, the maximum relative bias is 8.13%, and the averaged relative bias is 2.45%. It is shown that the energy absorption in PAR band by all substances in the atmosphere is unimportant, comparing to their scattering roles. |
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| Keywords: | solar radiation photosynthetically active radiation calculating method cloud |
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