| 1961—2018年广东高温的气候变率及其与大气环流和海温异常的关系 |
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| 引用本文： | 伍红雨,郭尧,吴遥.1961—2018年广东高温的气候变率及其与大气环流和海温异常的关系[J].热带气象学报,2020,36(4):455-463. |
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| 作者姓名： | 伍红雨 郭尧 吴遥 |
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| 作者单位： | 1.广东省气候中心，广东 广州 510641 |
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| 基金项目： | 广东省科技计划项目2017B020244002广东省科技计划项目2017B030314140 |
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| 摘 要： | 利用1961—2018年广东86个国家气象观测站逐日最高气温资料，NCEP/NCAR月尺度再分析大气环流资料、海表温度资料(ERSST V5)，国家气候中心大气环流指数资料，采用相关、合成、突变分析等方法分析了广东高温的气候变率及其与大气环流和海温的关系。结果表明，近58年来广东平均高温日数以3.0 d/(10 a)的速率显著上升，并在1998年发生增加的突变。广东高温日数具有显著的年际和年代际变化并且其对应的大气环流和海温的异常特征基本相同，但年际差异比年代际差异更加明显。在6—9月，对流层中高层位势高度正异常是广东高温日数偏多的一个重要原因，同时南亚高压和西太平洋副热带高压偏强、影响华南的偏北气流偏强，大陆高压加强也对应高温日数偏多。在5—8月，热带印度洋、热带西太平洋、南海海温偏高有利于广东高温日数增多。
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| 关 键 词： | 高温日数 气候变率 大气环流 海温 广东 |
| 收稿时间： | 2020-02-12 |
RELATIONSHIP BETWEEN THE CLIMATIC VARIABILITY OF HIGH TEMPERATURE IN GUANGDONG AND THE ABNORMAL ATMOSPHERIC CIRCULATION AND SST FROM 1961 TO 2018 |
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| WU Hong-yu,GUO Yao,WU Yao.RELATIONSHIP BETWEEN THE CLIMATIC VARIABILITY OF HIGH TEMPERATURE IN GUANGDONG AND THE ABNORMAL ATMOSPHERIC CIRCULATION AND SST FROM 1961 TO 2018[J].Journal of Tropical Meteorology,2020,36(4):455-463. |
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| Authors: | WU Hong-yu GUO Yao WU Yao |
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| Institution: | 1.Climate Center of Guangdong Province, Guangzhou 510641, China2.Guangzhou Institute of Tropical and Marine Meteorology/ Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction, CMA, Guangzhou 510641, China3.University of Southern California, Los Angeles 90007, USA4.Chongqing Climate Center, Chongqing 401147, China |
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| Abstract: | By using methods like correlation, synthesis, and mutation analysis, the present study has analyzed the characteristics of climatic variability of high temperature in Guangdong, and explored the causes of the anomalies, with daily maximum temperature data from 86 national meteorological observation stations in Guangdong from 1961 to 2018, NCEP/NCAR monthly scale reanalysis data of atmospheric circulation, sea surface temperature data (ERSST V5) and atmospheric circulation index from the National Climate Center. The results show that the average number of high temperature days in Guangdong has increased significantly at a rate of 3.0 d/(10a) in the past 58 years, with an abrupt increase in 1998. There are significant inter-annual and inter-decadal changes in the number of high temperature days in Guangdong, and its corresponding atmospheric circulation and SST anomaly characteristics are basically the same, with the inter-annual difference being more pronounced than inter-decadal difference. Positive height anomalies in the middle and upper troposphere are an important reason for the large number of high temperature days in Guangdong. Meanwhile, the South Asian High and the Western Pacific Subtropical High are stronger, and the northerly airflow affecting south China becomes stronger. The strengthening of continental high pressure also corresponds to the increasing number of high temperature days. High SST in the tropical Indian Ocean, tropical western Pacific and South China Sea is conducive to the increase of high temperature days in Guangdong from May to August. |
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| Keywords: | number of high temperature days climatic variability atmospheric circulation SST Guangdong |
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