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ISCCP产品和我国地面观测总云量差异

王旻燕 王伯民

王旻燕, 王伯民. ISCCP产品和我国地面观测总云量差异. 应用气象学报, 2009, 20(4): 411-418..
引用本文: 王旻燕, 王伯民. ISCCP产品和我国地面观测总云量差异. 应用气象学报, 2009, 20(4): 411-418.
Wang Minyan, Wang Bomin. Total cloud amount difference between ISCCP product and ground observation over China. J Appl Meteor Sci, 2009, 20(4): 411-418.
Citation: Wang Minyan, Wang Bomin. Total cloud amount difference between ISCCP product and ground observation over China. J Appl Meteor Sci, 2009, 20(4): 411-418.

ISCCP产品和我国地面观测总云量差异

资助项目: 

国家科技基础条件平台建设项目“气象科学数据共享中心” 2005DKA31700

国家自然科学基金项目 40605021

国家自然科学基金项目 40605011

Total Cloud Amount Difference Between ISCCP Product and Ground Observation over China

  • 摘要: 国际卫星云气候计划ISCCP是国际上较权威和客观的云气候性研究计划, 自1983年以来为研究全球云和辐射平衡、云水资源分布等提供了有价值的数据。在分析总云量卫星和地面两种观测方式差异的基础上, 研究了1984-2006年ISCCP D2产品和我国地面观测云资料数据集总云量空间及时间差异。尽管两套资料能一致揭示我国总云量的分布形势和气候变化特征, 但区域性差异仍比较明显。天基、地基数据可对比格点上, 全国平均而言总云量卫星观测结果比地面观测偏高8.46%, 华南地区差异最小、东北地区差异最大。气候变化趋势分析结果表明:近23年我国总云量呈减少趋势, ISCCP D2产品总云量每年减少速度为0.015%, 小于地面观测的总云量每年减少速度 (0.063%); 东北地区总云量缓慢增多, 而青藏高原、西北地区总云量减少。利用卫星和地面资料均以累积距平法检测出1984—2001年总云量减少、2002-2006年总云量显著增加。
  • 图  1  1984-2006年ISCCP D2产品总云量 (a) 和地面观测总云量 (b)(单位:%)

    Fig. 1  Total cloud amount of ISCCP D2 product (a) and ground observation (b) during 1984-2006(unit:%)

    图  2  比较2.5°×2.5°ISCCP D2产品和地面观测总云量的145个格点位置

    Fig. 2  Location of 145 grids to compare total cloud amount of 2.5°×2.5°ISCCP D2 product and ground observation

    图  3  1984-2006年ISCCP D2产品和地面观测格点总云量差 (单位:%)

    Fig. 3  Gridded total cloud amount difference between ISCCP D2 product and ground observation during 1984-2006(unit:%)

    图  4  1984-2006年各区域ISCCP D2产品和地面观测格点总云量多年变化

    Fig. 4  Inter-annual variation of grided total cloud amount of ISCCP D2 product and ground observation in the sub-regions during 1984-2006

    图  5  1984-2006年172个ISCCP D2格点和568个地面站点总云量多年变化 (a) 及总云量累积距平 (b)

    Fig. 5  Total cloud amount inter-annual variation of 172 ISCCP D2 grids and 568 stations (a) and their integral anomalies (b) during 1984-2006

    表  1  各区域范围、格点数、平均台站数及1984-2006年ISCCP D2产品和地面格点总云量

    Table  1  Scope of the sub-regions, grid number, average station number, grided total cloud amount of ISCCP D2 product, ground observation during 1984-2006

    表  2  各区域卫星和地面观测总云量多年变化相关情况

    Table  2  Relativity of total cloud inter-amount annual variation from satellite and ground observation results in the sub-regions

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出版历程
  • 收稿日期:  2008-09-02
  • 修回日期:  2009-03-23
  • 刊出日期:  2009-08-31

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