青藏高原的散射辐射特征
Characteristics of Diffuse Radiation on the Qinghai-Tibetan Plateau
查看参考文献48篇
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文摘
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利用大量连续观测数据阐明了青藏高原散射辐射的时间变化特征,揭示了晴空指数(R_s/R_o)与散射辐射的关系,以及不同晴空指数条件下散射辐射随太阳高度角的变化.散射辐射日最高值出现在午后,年最高值出现在4月份.日晴空指数小于0.3时,太阳辐射基本以散射辐射形式到达地面,日晴空指数大于0.3时,散射辐射占总辐射的比例随晴空指数的增加而呈线性递减.日晴空指数达到0.45左右时,散射辐射占大气外界太阳辐射日总量的比例最高.散射辐射随太阳高度的蛇呈指数递增,但晴空指数在0.3～0.7范围内时,散射辐射随太阳高度角的变化最为明显. |
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其他语种文摘
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We revealed the temporal variation in diffuse radiation （R_d）, and examined the effect of clearness index （R_s/R_o） on R_d on the Qinghai-Tibetan Plateau using the data observed in 2004. The daily maximum R_d appeared in afternoon due to the relatively stRong convection, and the annual maximum value was found in April. When R_d/R_s is less than 0. 3, the solar radiation （R_s） almost equals R_d, while the R_d/R_s decreased linearly with the increase in R_d/R_s when R_d/R_s is greater than 0.3. The ratio of R_d to extraterrestrial solar radiation （R_o） （R_d/ R_o） reached its peak value when the R_d/R_s was aR_ound 0.45. R_d increased exponentially with the increase in solar elevation, while the increase in R_d with solar elevation was rapid when the R_d/R, ranged fR_om 0.3 to 0.7. |
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来源
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南开大学学报. 自然科学版
,2008,41(3):69-78 【核心库】
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关键词
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总辐射
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散射辐射
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太阳高度角
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晴空指数
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地址
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1.
南开大学,生命科学学院, 天津, 300071
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日本国立环境研究所, 东京
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日本国立农业环境技术研究所, 东京
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中国科学院,西北高原生物研究所, 青海, 西宁, 810001
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0465-7942 |
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学科
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普通生物学 |
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基金
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日本环境厅全球环境研究基金(S-1)
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中国科学院“百人计划”项目
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文献收藏号
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CSCD:3328068
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