| Positive correlation between δ~(18)O in monsoon precipitation and atmospheric wind speed |
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| 作者姓名： | PANGHongxi HEYuanqing ZHANGZhonglin |
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| 作者单位： | [1]ColdandAridRegionsEnvironmentalandEngineeringResearchInstitute,ChineseAcademyofSciences,Lanzhou730000,China [2]InstituteofTibetanPlateauResearch,ChineseAcademyofSciences,Beijing100029,China |
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| 摘 要： | Analyzed results of the atmospheric wind speedand stable isotopic data (δ^18O) in summer precipitation atBangkok, Bombay, New Delhi, Kunming and Lhasa, the IAEA/WMO stations, indicate that δ^18O in monsoon pre-cipitation correlate positively to wind speed and that thereexists a monsoonal vapor layer over these monsoon-controlled areas during monsoon seasons. The isotopic ex-change happens between monsoon vapors and failing rain-drops in the layer, resulting in this correlation between δ^18O and wind speed. This suggests that wind speed is probablyone of key factors affecting the δ^18O variation besides air temperature and rainfall in the southwest monsoon domain.
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| 关 键 词： | 东南季风 δ^18O 大气风速 稳定同位素 水蒸气凝结 |
Positive correlation between δ18O in monsoon precipitation and atmospheric wind speed |
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| PANGHongxi HEYuanqing ZHANGZhonglin.Positive correlation between δ18O in monsoon precipitation and atmospheric wind speed[J].Chinese Science Bulletin,2004,49(9):938-941. |
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| Authors: | Pang Hongxi He Yuanqing Zhang Zhonglin |
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| Institution: | PANG Hongxi1, HE Yuanqing1,2 & ZHANG Zhonglin1 1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; 2. Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | Analyzed results of the atmospheric wind speed and stable isotopic data (d 18O) in summer precipitation at Bangkok, Bombay, New Delhi, Kunming and Lhasa, the IAEA/WMO stations, indicate that d 18O in monsoon pre-cipitation correlate positively to wind speed and that there exists a monsoonal vapor layer over these monsoon- controlled areas during monsoon seasons. The isotopic ex-change happens between monsoon vapors and falling rain-drops in the layer, resulting in this correlation between d 18O and wind speed. This suggests that wind speed is probably one of key factors affecting the d 18O variation besides air temperature and rainfall in the southwest monsoon domain. |
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| Keywords: | southwest monsoon δ~(18)O atmospheric wind speed |
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