| 基于ERA5再分析资料对2020年6月江淮区域水汽源汇的诊断分析 |
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| 引用本文： | 黄丁安,卢楚翰,孔阳,信飞,秦育婧.基于ERA5再分析资料对2020年6月江淮区域水汽源汇的诊断分析[J].气象科学,2022,42(1):44-50. |
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| 作者姓名： | 黄丁安 卢楚翰 孔阳 信飞 秦育婧 |
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| 作者单位： | 南京信息工程大学 气象灾害教育部重点实验室/气象灾害预报预警与评估协同创新中心, 南京 210044;上海市气候中心, 上海 200030 |
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| 基金项目： | 国家重点研发计划项目(2019YFC1510201);上海市"科技创新行动"攻关项目(20dz1200401);上海市气象局面上项目(MS202005);中国气象局预报员专项(CMAYBY2020-040) |
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| 摘 要： | 2020年6月,我国江淮区域出现大范围持续性强降水过程,并引发了洪涝灾害。利用ERA5再分析资料对江淮区域的水汽收支平衡进行分析,并利用HYSPLIT后向轨迹模式分析了其水汽源地。结果表明:(1)ERA5再分析资料能较好地描述本次过程中江淮区域的水汽收支特征,其中水汽辐合项为主要贡献项,对水汽汇有较好的指示作用,同时,降水和水汽汇之间保持了较好的一致性变化。(2)南海是江淮区域6月持续性降水最主要的水汽源地,约50%的水汽来自南海。(3)6月江淮区域降水分布与水汽的输送密切相关,而水汽输送主要取决于西太平洋副热带高压的位置及其与北侧冷涡活动的共同作用。
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| 关 键 词： | 梅雨 水汽收支 HYSPLIT后向轨迹模式 江淮区域 |
| 收稿时间： | 2021/1/15 0:00:00 |
| 修稿时间： | 2021/10/20 0:00:00 |
Diagnostic study of moisture sources and sinks over the Yangtze-Huaihe River Basin in June 2020 based on ERA5 reanalysis data |
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| HUANG Ding''an,LU Chuhan,KONG Yang,XIN Fei,QIN Yujing.Diagnostic study of moisture sources and sinks over the Yangtze-Huaihe River Basin in June 2020 based on ERA5 reanalysis data[J].Scientia Meteorologica Sinica,2022,42(1):44-50. |
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| Authors: | HUANG Ding'an LU Chuhan KONG Yang XIN Fei QIN Yujing |
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| Institution: | Key Laboratory of Meteorological Disaster, Ministry of Education/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China;Shanghai Climate Center, Shanghai 200030, China |
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| Abstract: | In June 2020, the large-scale continuous heavy precipitation processes occurred in the Yangtze-Huaihe River Basin (YHRB) of China, which caused flood disaster. In this study, the moisture budget in the YHRB was diagnosed and analyzed by using ERA5 reanalysis data, and the water vapor source was analyzed by HYSPLIT backward trajectory model. Results show that:(1) the characteristics of water vapor budget in the YHRB during this process can be well described by the ERA5 reanalysis data. The moisture convergence is the main contribution term, which is a good indicator on the water vapor sink. Meanwhile, there is a good consistency between precipitation and water vapor sink. (2) The South China Sea is the most important water vapor source for the persistent precipitation in the YHRB in June, and about 50% of the water vapor comes from here. (3) The distribution of precipitation in the YHRB in June is closely related to moisture transport, while moisture transport mainly depends on the position of the western Pacific subtropical high and its interaction with the activity of cold vortex in the north. |
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| Keywords: | Meiyu moisture budget HYSPLIT backward trajectory model Yangtze-Huaihe River Basin |
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