Synoptic weather patterns modulate the frequency, type and vertical structure of summer precipitation over Eastern China: A perspective from GPM observations
Synoptic weather patterns modulate the frequency, type and vertical structure of summer precipitation over Eastern China: A perspective from GPM observations
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天气模式调节中国东部夏季降水的频率、类型和垂直结构：GPM观测的视角
DOI：
10.1016/j.atmosres.2020.105342
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发表时间：
2021-02
影响因子：
5.5
通讯作者：
Huang Meng
中科院分区：
文献类型：
--
作者：
Yang Yuanjian;Wang Rui;Chen Fengjiao;Liu Chao;Bi Xueyan;Huang Meng
降水是东亚季风气候区最重要的天气特征之一，然而，不同的天气型如何调节降水的三维结构还有待充分了解。以中国东部地区为例，利用2014-2018年全球降水测量使命双频降水雷达三维降水观测资料，探讨了利用再分析资料客观划分的4种天气型（SWPs）下夏季降水的降水率（RR）、降水频率（PF）和垂直特征。这四种SWP被称为类型1、2、3和4。中国东部地区的RR、PF和垂直结构与这四个与西太平洋副热带高压有关的大尺度SWP的变化密切相关，并表现出明显的区域差异。在整个中国东部地区，层状、对流和浅对流降水的最高PFs出现在类型1下，其次是类型2。在40°N以南，对流降水和层状降水的RR值在类型1和类型2下均较强，而在40°N以北，这些特征在类型3和类型4下均较强。对流性降水和层状降水的等高频率图在5 km以上（以下）的大部分区域都表现出大值雷达反射率的正异常，属于第2类和第4类（第1类和第3类）。同时，大部分地区的大的正异常出现在3型和4型的浅对流降水，主要集中在海拔4km以下。这些垂直结构的差异主要取决于不同的垂直运动和水汽供应的位置有关的西太平洋副高。我们的研究结果提供了证据之间的三维特征的对流，浅对流，层状降水和大尺度西太平洋副热带高压环流的天气尺度上的可能联系。
Precipitation is one of the most important features of the weather in the East Asian monsoon climatic zone; however, the ways in which different synoptic weather patterns modulate the three-dimensional structures of precipitation are yet to be fully understood. Taking the example of eastern China and using the three-dimensional observations of precipitation measured by the dual-frequency precipitation radar onboard the Global Precipitation Measurement mission during 2014–2018, this study explores the rain rate (RR), precipitation frequency (PF), and vertical characteristics of precipitation during summer under four synoptic weather patterns (SWPs) objectively classified using reanalysis data. The four SWPs are referred to as Type 1, 2, 3, and 4. The RRs, PFs, and vertical structures over eastern China are closely linked to the variations of these four large-scale SWPs related to the western Pacific subtropical high (WPSH) and exhibit remarkable regional disparities. The highest PFs of stratiform, convective, and shallow convective precipitation over the whole of eastern China occur under Type 1, followed by Type 2. To the south of 40°N, a more intense RR for both stratiform and convective precipitation appears under Types 1 and 2, while to the north of 40°N these features appear under Types 3 and 4. The Contoured Frequency by Altitude Diagrams for both convective and stratiform precipitation exhibit large positive anomalies of large-value radar reflectivity above (below) 5 km over most regions under Types 2 and 4 (Types 1 and 3). Meanwhile, large positive anomalies for most regions occur under Types 3 and 4 for shallow convective precipitation and are mainly concentrated below the altitude of 4 km. These differences in vertical structures under different SWPs depend mainly on various vertical movements and water vapor moisture supplies related to the location of the WPSH. Our findings provide evidence of a possible linkage between the three-dimensional features of convective, shallow convective, and stratiform precipitation and large-scale WPSH circulation on the synoptic scale.
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影响因子：
8
作者：
Robert W. Burpee;D. G. Marks;R. T. Merrill
通讯作者：
Robert W. Burpee;D. G. Marks;R. T. Merrill
影响因子：
3
作者：
P. Hoffmann;K. Schlünzen
通讯作者：
P. Hoffmann;K. Schlünzen
DOI：
--
发表时间：
2006
期刊：
Climatic and Environmental Research
影响因子：
--
作者：
Z. Qing;Wang Yuan
通讯作者：
Z. Qing;Wang Yuan
1998-2013年东亚夏季风对流和层状降水的年际变化
DOI：
10.1002/joc.4572
发表时间：
2016-08-01
期刊：
INTERNATIONAL JOURNAL OF CLIMATOLOGY
影响因子：
--
作者：
Lu, Daren;Yang, Yuanjian;Fu, Yunfei
通讯作者：
Fu, Yunfei
DOI：
10.1002/joc.3970
发表时间：
2015-02
期刊：
International Journal of Climatology
影响因子：
--
作者：
S. Fiddes;A. Pezza;V. Barras
通讯作者：
S. Fiddes;A. Pezza;V. Barras