2010年江蘇省連續(xù)性高溫特點及成因分析

doi:10.3969/2012jms.0029

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2010年江蘇省連續(xù)性高溫特點及成因分析
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                        10.3969/2012jms.0029
                    
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基金項目:江蘇省科技支撐計劃-社會發(fā)展項目(BE2009694);江蘇省氣象局科研開放基金(K201006)

Analysis on characteristic and cause of continuous high temperature of Jiangsu province in 2010

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利用江蘇省常規(guī)氣象觀測資料、1961—2010年全省73個站的歷史高溫資料以及NCEAP 2.5×2.5再分析資料,分析總結(jié)了江蘇省高溫天氣氣候特點及2010年高溫情況,并在此基礎(chǔ)上重點對2010年連續(xù)高溫天氣特點及成因進行了分析。結(jié)果表明:江蘇省高溫日數(shù)以7月最多(占高溫總?cè)諗?shù)的44.1%)、8月次之(占29.2%);空間分布上呈西南部地區(qū)多,東部沿海少的特點;2010年8月連續(xù)高溫頻發(fā),過程間隔時間短,且區(qū)域性連續(xù)高溫時段主要集中在8月份,較多年平均偏晚,部分市縣最高氣溫創(chuàng)當?shù)赜袣庀筚Y料以來的歷史新高;盛夏期間前期赤道輻合帶不活躍,不利于副高北抬,是造成該年出梅后區(qū)域性連續(xù)高溫偏晚的一個重要原因;而8月份南亞高壓脊線位置偏南,強盛的副高持續(xù)控制江蘇省,加上臺風北上活動影響少,致使該月連續(xù)性高溫頻發(fā)。連續(xù)高溫期間副高能快速恢復(fù)增強,促使連續(xù)性高溫過程頻繁且間隔時間短。

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Based on the conventional observation data and historical high temperature data of 73 stations as well as the 2.5°×2.5° reanalysis data of NCEP/ NCAR, the climate characteristics of high temperature weather and the high temperature case of 2010 in Jiangsu have been summarized, particularly the regional continuous high-temperatures of 2010 has been analyzed. The results show that high temperature days of Jiangsu appeared most frequently in July (44.1% of the total number of days), followed by August (29.2%). There are more high temperature days in the southwest region and less ones in the east coast. In 2010, the regional continuous high temperature period concentrated on August, but it was later compared to previous years,and the interval is shorter. The highest temperature in some local cities and counties broke record of the weather data. The early equatorial convergence zone was not active and the subtropical high was not conducive to move to the north, which was the main reasons of later presence of regional continuous high-temperature.The stronger subtropical high sustaining control of Jiangsu in August, and less influence of typhoon resulted in frequent high-temperature. Enhanced subtropical high can be quickly recovered, which made continuous high-temperature more frequent and its interval shorter.

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嚴文蓮,韓桂榮,魏建蘇,李超,孫燕.2010年江蘇省連續(xù)性高溫特點及成因分析.氣象科學,2012,32(3):293-297 YAN Wenlian, HAN Guirong, WEI Jiansu, LI Chao, SUN Yan. Analysis on characteristic and cause of continuous high temperature of Jiangsu province in 2010. Journal of the Meteorological Sciences,2012,32(3):293-297

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收稿日期:2011-01-19
最后修改日期:2011-04-04
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在線發(fā)布日期: 2012-06-15
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