| Analyzing global trends of different cloud types and their potential impacts on climate by using the ISCCP D2 dataset |
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| 作者姓名： | DINGShouguo SHIGuangyu ZHAOChunsheng |
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| 作者单位： | [1]LASG,InstituteofAtmosphericPhysics,ChineseAcademyofSciences,Beijing100029,China [2]DepartmentofAtmosphericScience,SchoolofPhysics,PekingUniversity,Beijing100871,China |
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| 摘 要： | The International Satellite Cloud Climatology roject (ISCCP) D2 dataset is used to study the global distribution of low, middle and high cloud amounts and their rends of 1983-2001. Evidences have shown that global arming has accelerated over the past 20 a and the 1990s as the warmest decade in the instrumental records since 861. Trends of various clouds amounts over this period are nalyzed by employing the linear regression method. The esults show that global mean total cloud amounts, in general,have tended to reduce over the past 20 a. But there are lightly increasing by about 2% before 1987 and decreasing y about 4% since then. Cloudiness trends of both low and igh clouds decrease while increase for the middle cloud.And there exist remarkable discrepancies in different regions.The preliminary analyses suggest that it is likely that the loud change occurring over the past 20 a is a positive feedback to global warming.
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| 关 键 词： | ISCCP D2数据集 全球气候变暖 国际卫星云图气候工程 线性衰退方法 大气环流模型 |
| 收稿时间： | 2003-12-04 |
| 修稿时间： | 2004-03-26 |
Analyzing global trends of different cloud types and their potential impacts on climate by using the ISCCP D2 dataset |
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| DINGShouguo SHIGuangyu ZHAOChunsheng.Analyzing global trends of different cloud types and their potential impacts on climate by using the ISCCP D2 dataset[J].Chinese Science Bulletin,2004,49(12):1301-1306. |
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| Authors: | Ding Shouguo Shi Guangyu Zhao Chunsheng |
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| Institution: | DING Shouguo1,2, SHI Guangyu1 & ZHAO Chunsheng3 1. LASG, Institute of Atmospheric Physics, Chinese Academy of Sci- ences, Beijing 100029, China; 2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China; 3. Department of Atmospheric Science, School of Physics, Peking University, Beijing 100871, China |
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| Abstract: | The International Satellite Cloud Climatology Project (ISCCP) D2 dataset is used to study the global distribution of low, middle and high cloud amounts and their trends of 1983–2001. Evidences have shown that global warming has accelerated over the past 20 a and the 1990s was the warmest decade in the instrumental records since 1861. Trends of various clouds amounts over this period are analyzed by employing the linear regression method. The results show that global mean total cloud amounts, in general, have tended to reduce over the past 20 a. But there are slightly increasing by about 2% before 1987 and decreasing by about 4% since then. Cloudiness trends of both low and high clouds decrease while increase for the middle cloud. And there exist remarkable discrepancies in different regions. The preliminary analyses suggest that it is likely that the cloud change occurring over the past 20 a is a positive feedback to global warming. |
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| Keywords: | ISCCP cloud amount global warming trend of cloud |
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