沈陽(yáng)近百年的溫度變化特征及其環(huán)流形勢(shì)分析

doi:10.3969/2012jms.00**

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沈陽(yáng)近百年的溫度變化特征及其環(huán)流形勢(shì)分析
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                        10.3969/2012jms.00**
                    
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中圖分類號(hào):P458
基金項(xiàng)目:中國(guó)氣象局沈陽(yáng)大氣環(huán)境研究所創(chuàng)新項(xiàng)目 (s0 30 4 0 1)資助

SHENYANG TEMPERATURE CHANGE CHARACTERISTIC AND ITS CIRCULATION SITUATION ANALYSIS OF THE PAST ONE HUNDRED YEARS

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摘要:

沈陽(yáng)地處全球溫度變化的敏感帶，在近百年的溫度觀測(cè)記錄中，沈陽(yáng)的溫度變化呈逐漸上升之勢(shì)，近百年增高約1．7℃，這種上升趨勢(shì)在冬季遠(yuǎn)比夏季明顯。沈陽(yáng)的年平均溫度變化有一個(gè)12a的周期，各周期溫度基本呈階梯狀上升，20世紀(jì)末的周期冬季平均溫度比世紀(jì)初的周期升溫2．8℃左右。從近50a的極端溫度的變化趨勢(shì)來(lái)看，極端最低溫度明顯升高，而極端最高溫度并沒(méi)有上升，變化趨勢(shì)甚至略下降，以致冬、夏兩季溫差縮小。從沈陽(yáng)的最低平均溫度和最高平均溫度變化來(lái)看，兩者均隨時(shí)間逐漸升高，說(shuō)明沈陽(yáng)市的增溫不僅是最低溫度升高造成的，最高溫

Abstract:

Shenyang locates in the sensitive region of global change. In past o ne hundred years, Shenyang temperature kept rising gradually by 1.7 Celsius degr ees. This trend is more obvious in winter than in summer. Annual average tempera ture of Shenyang has a 12-years cycle, and temperature basically presents ladder form rise in every cycle. The cycle average temperature in winter of the end of 20th century rose about 2.8 Celsius degrees than that of the beginning of the c entury. According to variation tendency of the extreme temperature of the past 5 0 years, the minimum extreme temperature obviously rose; the maximum extreme tem perature has not risen, but slightly dropped, so that the temperature difference reduced between winter and summer. The fact, the lowest average temperature and the highest average temperature of Shenyang both rise gradually with time, prov es that not only the rise of minimum temperature leads to the increasing war m of Shenyang, but also the rise of maximum temperature is also important. Analysis o f the winter circulation situation shows that: East Asia Trough, the weak ridge behind it, and Mongolian Ground High subsided obviously after the 80s of last ce ntury, and the cold air current passed Shenyang from the north is weakened conse quently. This is one of reasons why Shenyang temperature is obviously increas ing in winter.

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周小珊,李輯,楊森,周廣勝.沈陽(yáng)近百年的溫度變化特征及其環(huán)流形勢(shì)分析.氣象科學(xué),2004,(4):424-431 Zhou Xiaoshan, Li Ji, Yang Sen, Zhou Guangsheng. SHENYANG TEMPERATURE CHANGE CHARACTERISTIC AND ITS CIRCULATION SITUATION ANALYSIS OF THE PAST ONE HUNDRED YEARS. Journal of the Meteorological Sciences,2004,(4):424-431

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