| 青藏高原感热通量的变化及与江淮流域降水异常的关系 |
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| 引用本文： | 顾思南,房佳蓓,刘建勇.青藏高原感热通量的变化及与江淮流域降水异常的关系[J].气象科学,2015,35(3):305-311. |
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| 作者姓名： | 顾思南 房佳蓓 刘建勇 |
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| 作者单位： | 宁波市气象台, 浙江宁波 315012,南京大学 大气科学学院, 南京 210023,宁波市气象台, 浙江宁波 315012 |
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| 基金项目： | 中国气象局成都高原气象研究所开放基金项目(LPM2009015);浙江省气象科技计划项目(2014ZD06-3);宁波市气象科技计划项目(NBQX2014010B) |
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| 摘 要： | 利用1979—2010年NCEP-R2再分析资料和全国586站降水资料, 对青藏高原感热通量进行小波变换和EOF分析, 并研究了它与江淮流域降水的关系。结果发现:高原感热通量具有2 a和8 a的变化周期。空间分布上主要有东、西反相变化和南、北反相变化以及全区一致性变化3种形态。高原感热通量与江淮流域降水异常的同期相关中, 1998年以来, 春季高原东部的感热通量偏小, 其他地区偏大, 与此同期江淮流域降水偏少;夏季西藏西部的感热通量偏小, 其他地区偏大, 与此同期江淮流域降水偏多。两者超前相关中, 江淮流域降水对春季的感热通量变化最敏感。1998年以来, 当春季高原东南部的感热通量偏小, 其他地区偏大时, 江淮流域的夏季降水偏多, 秋季降水偏少;当春季高原感热通量东部偏小, 西部偏大时, 江淮流域的冬季降水以长江为界南多北少, 次年春季降水偏少。
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| 关 键 词： | 降水 感热通量 小波分析 EOF分解 |
| 收稿时间： | 2014/5/19 0:00:00 |
| 修稿时间： | 8/3/2014 12:00:00 AM |
Variability of sensible heat flux in Tibetan Plateau and its relation with precipitation anomaly in Changjiang-Huaihe River valley |
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| GU Sinan,FANG Jiabei and LIU Jianyong.Variability of sensible heat flux in Tibetan Plateau and its relation with precipitation anomaly in Changjiang-Huaihe River valley[J].Scientia Meteorologica Sinica,2015,35(3):305-311. |
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| Authors: | GU Sinan FANG Jiabei and LIU Jianyong |
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| Institution: | Ningbo Meteorological Observatory, Zhejiang Ningbo 315012, China;) (,School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China and Ningbo Meteorological Observatory, Zhejiang Ningbo 315012, China;) ( |
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| Abstract: | The NCEP-R2 reanalysis data and precipitation data from 586 stations in China during 1979-2010 were selected to apply wavelet transform and EOF analysis to the variability of the sensible heat flux in the Tibetan Plateau (TP) and its relation with the precipitation anomaly in the Changjiang-Huaihe River valley (CHRV). Results show that three variation patterns of sensible heat flux with principal variation periods of 2 years and 8 years exist in the TP:east-west inverted change, south-north inverted change and all region consistent change. The contemporaneous correlation between the variation of sensible heat flux in the TP and precipitation anomaly in the CHRV indicates that since 1998, when the sensible heat flux in eastern TP in spring belongs to a smaller value, but still assumes to be greater than that in other areas, the CHRV is drier at the same period; when the sensible heat flux in western Tibet in summer is smaller, but it is still bigger than that in other areas, the CHRV is wetter at the same period. The precipitation over the CHRV is more sensitive to the variation of sensible heat flux in spring in the leading correlation. Since 1998, when the sensible heat flux in southeastern TP in spring is smaller, but it is still bigger than that in other areas, the CHRV is wetter in summer but drier in autumn; when the sensible heat flux is smaller in eastern TP but bigger in west in spring, South Changjiang River is wetter and the north is drier in winter while the CHRV is drier in next spring. |
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| Keywords: | Precipitation Sensible heat flux Wavelet analysis EOF analysis |
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