| 江淮梅雨空间非均匀性的定量探讨 |
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| 引用本文： | 朱坚,陈喜,杨开斌.江淮梅雨空间非均匀性的定量探讨[J].气象科学,2016,36(2):224-229. |
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| 作者姓名： | 朱坚 陈喜 杨开斌 |
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| 作者单位： | 河海大学 水文水资源与水利工程科学国家重点实验室, 南京 210098,河海大学 水文水资源与水利工程科学国家重点实验室, 南京 210098,河海大学 水文水资源与水利工程科学国家重点实验室, 南京 210098 |
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| 基金项目： | 国家自然科学基金资助项目(51190091,41105044,41205038);黄土与第四纪地质国家重点实验室开放基金(SKLLQG1308) |
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| 摘 要： | 针对江淮梅雨空间分布非均匀的定量化问题,基于1960—2007年江淮地区高密度站点资料,运用空间集中度和集中区的方法定量分析江淮梅雨的空间非均匀性特征。结果表明,江淮梅雨的降水集中区呈现出年代际南北移动特征,自1970s末降水转型后,1980—1999年,强降水易于发生在长江中下游地区,而2000年后易于出现在淮河流域。48 a来梅雨的空间非均匀程度呈现弱的增加趋势。当梅雨雨带偏南,即位于长江中下游地区时,降水空间集中度较大。通过与大气环流场的回归分析表明,江淮梅雨非均匀程度的增加可能与西太平洋副高和副热带西风急流的南移有关。
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| 关 键 词： | 江淮梅雨 空间集中区 空间集中度 |
| 收稿时间： | 4/1/2015 12:00:00 AM |
| 修稿时间： | 2015/4/13 0:00:00 |
The heterogeneous spatial characteristics of Meiyu rainfall over Jiang-Huai regions |
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| ZHU Jian,CHEN Xi and YANG Kaibin.The heterogeneous spatial characteristics of Meiyu rainfall over Jiang-Huai regions[J].Scientia Meteorologica Sinica,2016,36(2):224-229. |
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| Authors: | ZHU Jian CHEN Xi and YANG Kaibin |
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| Institution: | State Key Laboratory of Hydrology-Water Resources and Hydraulics Engineering, Hohai University, Nanjing 210098, China,State Key Laboratory of Hydrology-Water Resources and Hydraulics Engineering, Hohai University, Nanjing 210098, China and State Key Laboratory of Hydrology-Water Resources and Hydraulics Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | This study focused on the issue of quantifying the heterogeneous spatial characteristics of Meiyu rainfall over Jiang-Huai regions. Based on the 1960-2007 daily precipitation data, the spatial concentrated degree (SCD) and spatial concentrated region (SCR) are used to identify the heterogeneous spatial characteristics. The results show that the Jiang-Huai Meiyu rainfall is mainly concentrated over the Yangtze River region in 1980-1999 and the Huaihe region in 2000-2007. Moreover, non-significant increasing trend is also found during 1960-2007. When the Meiyu rainfall mainly locates over the Yangtze River regions, the rainfall concentration is more significant. The associated atmospheric circulation regression analysis shows that the Meiyu rainfall may be more concentrated when both the western Pacific subtropical high and the East Asia subtropical westerly jet move southward. |
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| Keywords: | Jiang-Huai Meiyu Spatial concentrated region Spatial concentrated degree |
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