昆山50a最高氣溫變化特征

doi:10.3969/2012jms.00**

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昆山50a最高氣溫變化特征
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                        10.3969/2012jms.00**
                    
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基金項(xiàng)目:蘇州市氣象局2008年自立課題(SZ200808)

Change characteristics of maximum temperature in past 50 a in Kunshan

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摘要:

利用1961—2010年昆山逐日最高氣溫資料,采用趨勢(shì)分析、滑動(dòng)平均、小波變換等方法,分析了昆山市50a平均最高氣溫的變化特征,以及高溫天氣的氣候特征。結(jié)果表明:昆山年平均最高氣溫整體呈振蕩上升趨勢(shì),1980s后期開(kāi)始上升趨勢(shì)顯著。50a的年平均最高氣溫存在著24 a、15 a、10 a左右的年代際變化周期以及4 a的年際變化周期。高溫總?cè)諗?shù)從1990s起明顯增多,21世紀(jì)以來(lái)高溫總?cè)諗?shù)進(jìn)一步增加。高溫初日呈現(xiàn)逐漸偏早的趨勢(shì),終日呈現(xiàn)"晚—早—晚"的趨勢(shì),高溫時(shí)間逐漸延長(zhǎng)。高溫過(guò)程發(fā)生在6月下旬至9月上旬,各級(jí)高溫過(guò)程數(shù)都以7月最多,8月次之,21世紀(jì)前10年高溫過(guò)程數(shù)最多。

Abstract:

The variation characteristics of average maximum temperature and high temperature days were analyzed by the linear trend method, sliding average method and the wavelet translation method, based on the daily maximum temperature in Kunshan from 1961 to 2010. The results showed that average maximum temperature increased with slight fluctuation. The average maximum temperature had an obvious increasing trend since late 1980s. Its oscillation period was 24 a, 15 a, 10 a and 4 a. The change in the number of high temperature days showed an obvious increasing trend since 1990s, especially since 2001. The first days of maximum temperature had an earlier trend and the last days of maximum temperature had a later-earlier-later pattern. The high temperature duration was increased gradually. High temperature processes occurred from the last ten days of June to the first ten days of September. The maxi mum number of each type of high temperature process belonged to July, while August took second place. In the first ten years of the 21st century, there was the maximum number of each type of high temperature process appeared most frequently.

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汪婷,吳珂.昆山50a最高氣溫變化特征.氣象科學(xué),2011,(s1):134-138 WANG Ting, WU Ke. Change characteristics of maximum temperature in past 50 a in Kunshan. Journal of the Meteorological Sciences,2011,(s1):134-138

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收稿日期:2011-11-03
最后修改日期:2011-12-03
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在線(xiàn)發(fā)布日期: 2012-09-25
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