| 华南秋季大尺度大气水汽汇时空演变特征 |
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| 引用本文： | 简茂球,秦晓昊,乔云亭.华南秋季大尺度大气水汽汇时空演变特征[J].热带海洋学报,2006,25(6):22-27. |
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| 作者姓名： | 简茂球 秦晓昊 乔云亭 |
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| 作者单位： | 1. 中山大学季风与环境研究中心/大气科学系,广东,广州,510275;广东省气象台,广东,广州,510080
2. 中山大学季风与环境研究中心/大气科学系,广东,广州,510275 |
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| 基金项目： | 广东省自然科学基金;中国气象局气候变化专项基金 |
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| 摘 要： | 用1958—2004年NCEP/NCAR再分析资料和中国160站月降水量资料分析了华南秋季大尺度大气水汽汇的时空变化特征。结果表明,华南中西部、东部地区是华南秋季水汽汇的2个主要变异中心区。华南中西部地区秋季水汽汇与该地区降水一样,以年际尺度变化为主;而该地区蒸发量的年代际变化比年际变化还稍显著。华南东部地区秋季降水、水汽汇和蒸发都存在明显的年际和年代际变化特征。如果我国南方上空出现向东北(向西南)的水汽通量距平,则会导致华南上空的水汽汇偏强(偏弱)。
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| 关 键 词： | 华南 大尺度水汽汇 时空变化 秋季 |
| 文章编号： | 1009-5470（2006）06-0022-06 |
| 收稿时间： | 2006-02-20 |
| 修稿时间： | 2006-04-03 |
Spatial and temporal variations of large-scale atmospheric moisture sinks over south China in autumn |
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| JIAN Mao-qiu,QIN Xiao-hao,QIAO Yun-ting.Spatial and temporal variations of large-scale atmospheric moisture sinks over south China in autumn[J].Journal of Tropical Oceanography,2006,25(6):22-27. |
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| Authors: | JIAN Mao-qiu QIN Xiao-hao QIAO Yun-ting |
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| Institution: | 1. Research Center for Monsoon and Environment/Department of Atmospheric Sciences, Sun Yat-sen University, Guangzhou 510275, China; 2. Meteorological Observatory of Guangdong Province, Guangzhou 510080, China |
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| Abstract: | The spatial and temporal variations of large-scale atmospheric moisture sinks over south China in autumn during a 47-year period from 1958 to 2004 are studied with the NCEP/NCAR reanalysis data and the precipitation data at 160 stations in China.The results reveal that two main anomalous centers of moisture sinks are respectively located at the central-western part and the eastern part of south China.The autumn moisture sink and the precipitation over the central-western part of south China are characterized with dominant interannual time-scale variations,whereas the interdecadal variation of evaporation is a dominant variation component.The autumn moisture sink over the eastern part of south China also experiences both remarkable interannual and interdecadal variations.The northeastward(southwestward) moisture flux anomalies occurring over south China and its vicinity can result in more(less) atmospheric water resource over the sub-regions in south China. |
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| Keywords: | south China large-scale moisture sink spatial and temporal variation autumn |
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