太平洋SSTA对中国东部夏季降水的影响II——数值模拟

余贞寿; 孙照渤; 曾刚

太平洋SSTA对中国东部夏季降水的影响II——数值模拟

1.
南京信息工程大学/气象灾害与环境变化重点实验室, 江苏, 南京, 210044;浙江省温州市气象局, 浙江, 温州, 325003
2.
南京信息工程大学/气象灾害与环境变化重点实验室, 江苏, 南京, 210044

基金项目: 国家自然科学基金重点项目(40331010)资助

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出版历程
- 收稿日期: 2004-04-29
- 修回日期: 2004-10-18

THE EFFECTS OF PACIFIC SSTA ON SUMMER PRECIPITATION OVER EASTERN CHINA II——Numerical Simulations

1.
Nanjing University of Information Science & Technology, Key Laboratory of Meteorological Disaster and Environmental Variation, Nanjing 210044, China
2.
Nanjing University of Information Science & Technology, Key Laboratory of Meteorological Disaster and Environmental Variation, Nanjing 210044, China

摘要

摘要: 基于观测分析的结果,采用NCAR CCM3模式,设计4组7个数值试验,研究太平洋海表温度异常对中国东部夏季降水影响及其可能的物理过程。结果表明:数值模拟与观测分析所得的结果一致,前期冬季西北太平洋黑潮海区海温异常,引起亚洲中高纬和东亚东部地区大气环流异常,导致长江流域夏季降水异常;前期春季赤道中东太平洋海温异常,西太平洋副热带高压异常;同期夏季北太平洋中纬中太平洋海区海温异常,激发夏季EUP遥相关型,影响东部夏季降水。
- 太平洋 /
- SSTA /
- 中国东部 /
- 夏季降水 /
- 数值模拟
Abstract: Based on the observational analysis,seven numerical experiments are designed to study the impacts of Pacific SSTA on summer precipitation over Eastern China and relevant physical mechanism by NCAR CCM3.The numerical simulation results show:preceding winter SSTA in the kuroshio region leads to summer precipitation anomaly over Yangtze river valley by modifying atmospheric general circulation over Eastern Asia and middle-high latitude;Western Pacific high is notably affected by preceding spring SSTA over the middle and east of Equator Pacific;SSTA of the center region of middle latitude in the corresponding period causes the summer rainfall anomaly over eastern China so as to trigger the atmospheric Eurasia-Pacific teleconnection pattern.
- Pacific /
- SSTA /
- Eastern China /
- summer precipitation /
- numerical simulations

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参考文献(22)

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