| 孟加拉湾潜热通量与陕西秋季9-10月降水的关系 |
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| 引用本文： | 王丹,盛立芳,高红燕,杨新,李建科.孟加拉湾潜热通量与陕西秋季9-10月降水的关系[J].资源科学,2014,36(4):773-781. |
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| 作者姓名： | 王丹 盛立芳 高红燕 杨新 李建科 |
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| 作者单位： | 陕西省气象服务中心, 西安710014;中国海洋大学物理海洋教育部重点实验室, 海洋-大气相互作用气候实验室, 青岛266100;陕西省气象服务中心, 西安710014;陕西省气象服务中心, 西安710014;陕西省气象服务中心, 西安710014 |
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| 基金项目： | 陕西省气象局预报员专项（编号：2014Y-24）；干旱气象科学研究基金（IAM201306）；陕西省气象局数值预报应用研究创新团队资助项目。 |
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| 摘 要： | 利用1979-2011年秋季9-10月陕西96个台站的逐日降水资料和NCEP/NCAR再分析月平均资料,分析了孟加拉湾潜热通量与陕西秋季降水的关系,指出了影响陕西秋季旱涝的热源关键区域,并就其影响陕西秋季旱涝的成因机制进行初步分析,得出以下结论:陕西秋季降水与孟加拉湾主体海域的潜热通量变化为显著负相关,当该海域潜热通量偏弱时,乌拉尔山高压偏强,西太平洋副热带高压位置偏西偏北,孟加拉湾至青藏高原南侧多低槽活动,形成了有利于陕西秋季降水的环流形势,同时,陕西地区的偏南水汽输送增强,大气辐合上升运动也增强,陕西秋季降水偏多的可能性较大。此外,孟加拉湾上一年冬季、当年夏季的潜热通量大小与秋季的有显著正相关关系,因此,该海域上一年冬季、当年夏季的潜热通量强弱可以作为预测陕西秋季降水多寡的重要参考。
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| 关 键 词： | 陕西省 秋季降水 潜热通量 孟加拉湾 |
Relationship between Latent Heat Net Flux over the Bay of Bengal and Autumn Rainfall in Shaanxi Province from September to October |
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| WANG Dan,SHENG Lifang,GAO Hongyan,YANG Xin and LI Jianke.Relationship between Latent Heat Net Flux over the Bay of Bengal and Autumn Rainfall in Shaanxi Province from September to October[J].Resources Science,2014,36(4):773-781. |
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| Authors: | WANG Dan SHENG Lifang GAO Hongyan YANG Xin and LI Jianke |
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| Institution: | Shaanxi Service Center of Meteorological , Xi'an 710014, China;The Key Laboratory of Physical Oceanography of Ministry of Education, Ocean-Atmosphere Interaction Laboratory of Ocean University of China, Qingdao 266100, China;Shaanxi Service Center of Meteorological , Xi'an 710014, China;Shaanxi Service Center of Meteorological , Xi'an 710014, China;Shaanxi Service Center of Meteorological , Xi'an 710014, China |
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| Abstract: | Based on NCEP/NCAR reanalysis monthly data and daily precipitation in autumn during September and October at 96 stations in Shaanxi province from 1979 to 2011,latent heat net flux over the Bay of Bengal and the key area associated with the autumn rainfall were analyzed. The results show that there is a notable negative correlation between autumn rainfall in Shaanxi and the intensity of the latent heat net flux over the Bay of Bengal(key area). The autumn rainfall in Shaanxi is more than normal while the latent heat source over the Bay of Bengal(key area)is weaker. The Ural blocking high and the low trough over the Bay of Bengal to the south of the Qinghai Tibet plateau are stronger than normal,the ridge positions of the western Pacific subtropical high lean to west and north,and the vapor transport comes from a southerly flow and convergent upward velocity are strengthened while the intensity of the latent heat net flux over the Bay of Bengal(key area)is weaker,which is propitious to the appearance of circulation for the autumn rainfall in Shaanxi. The intensity of the latent heat source over the Bay of Bengal(key area)can been taken as a main reference for the forecast of autumn rainfall in Shaanxi,because the latent heat source over the key area is positively correlated with that in the previous winter and summer. |
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| Keywords: | Shaanxi province autumn rainfall latent heat net flux Bay of Bengal |
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