中國(guó)東北冬季極端低溫的年代際變化及其成因

doi:10.12306/2021jms.0107

首頁(yè) > 過(guò)刊瀏覽>2022年第42卷第6期 >711-720. DOI:10.12306/2021jms.0107

中國(guó)東北冬季極端低溫的年代際變化及其成因
DOI:
                        10.12306/2021jms.0107
                    
CSTR:
                        
                    
作者:
                        
                        
                    
作者單位:
作者簡(jiǎn)介:
通訊作者:
中圖分類(lèi)號(hào):P467
基金項(xiàng)目:國(guó)家自然科學(xué)基金資助項(xiàng)目(42075032);湖北省氣象局科技發(fā)展基金項(xiàng)目(2020Z05)

Characteristics and causes of the interdecadal variability of winter low temperature extremes in Northeast China

Author:

Affiliation:

Fund Project:

摘要

圖/表

訪問(wèn)統(tǒng)計(jì)

參考文獻(xiàn)

相似文獻(xiàn)

引證文獻(xiàn)

資源附件

文章評(píng)論

摘要:

利用JRA-55再分析資料和中國(guó)824站日最低氣溫?cái)?shù)據(jù),分析了1961—2013年冬季中國(guó)東北地區(qū)極端低溫的年代際變化及其動(dòng)力成因。結(jié)果表明:東北冬季極端低溫1980s中期前頻發(fā),1980s后期到2000s初少發(fā),2000s后恢復(fù)多發(fā)。這與貝加爾湖阻塞高壓頻次偏多—偏少—偏多的同步年代際變化直接相關(guān),與北極濤動(dòng)(Arctic Oscillation,AO)和準(zhǔn)定常行星波活動(dòng)的年代際振蕩相聯(lián)系。相比于1980s中期前,1988—1999年期間行星波沿極地波導(dǎo)向平流層的傳播減弱,引起高緯度平流層下層E-P通量輻合變?nèi)?而行星波沿低緯波導(dǎo)往副熱帶對(duì)流層上層的傳播增強(qiáng),造成副熱帶對(duì)流層中上層E-P通量輻合增強(qiáng)。行星波E-P通量散度的異常由于波—流相互作用,分別導(dǎo)致了極夜急流加強(qiáng)、副熱帶急流減弱,因而AO增強(qiáng),不利于貝湖阻高建立和環(huán)流經(jīng)向型發(fā)展,極端低溫減少。2000—2013年,行星波活動(dòng)相反,導(dǎo)致AO減弱,貝湖阻高多發(fā),極端低溫恢復(fù)增多。

Abstract:

On the basis of the daily minimum surface air temperature data at 824 stations in China and reanalysis data of the JRA-55 from 1961 to 2013, the characteristics and internal dynamical causes of the interdecadal variability of winter low temperature extremes in Northeast China were analyzed. Results show that an apparent interdecadal variability of winter low temperature extremes with the high-frequency period before the mid-1980s, the low-frequency period from the late 1980s to the early 2000s, and the frequently-occurring recovery after the early 2000s. It is found that the interdecadal variability was synchronized with the frequency of Baikal Blocking High changing from high to low, and then to high on the interdecadal timescale, and might be modulated by the interdecadal variation in the Arctic Oscillation (AO) and the quasi-stationary planetary wave activity. Compared with the period before the mid-1980s, for the period of 1988-1999 the upward propagation of quasi-stationary planetary waves into the stratosphere over high latitudes along the polar wave-guide was reduced, decreasing the convergence of Eliassen-Palm (E-P) fluxes in the lower stratosphere over high latitudes of the Northern Hemisphere; whereas the horizontal propagation into the troposphere over the subtropics along the low-latitude wave-guide was enhanced, increasing the convergence of E-P fluxes in the middle and upper troposphere over the subtropics. These resulted in an enhanced polar front jet and a weakened subtropical jet, respectively, through planetary wave-mean flow interaction. The wintertime AO was then enhanced, against the formation of Baikal Blocking High and the development of meridional circulation, which led to a low occurrence of extreme low temperatures. After entering the period 2000-2013, the opposite process caused to the weakening of the AO, which in turn led to the frequent occurrences of Baikal blocking high and extreme low temperatures.

參考文獻(xiàn)

相似文獻(xiàn)

引證文獻(xiàn)

引用本文

閔錦忠,粘新悅,孫玉婷,李巖.中國(guó)東北冬季極端低溫的年代際變化及其成因.氣象科學(xué),2022,42(6):711-720 MIN Jinzhong, NIAN Xinyue, SUN Yuting, LI Yan. Characteristics and causes of the interdecadal variability of winter low temperature extremes in Northeast China. Journal of the Meteorological Sciences,2022,42(6):711-720

復(fù)制

文章指標(biāo)

點(diǎn)擊次數(shù):
下載次數(shù):
HTML閱讀次數(shù):
引用次數(shù):

歷史

收稿日期:2021-10-05
最后修改日期:2021-11-10
錄用日期:
在線發(fā)布日期: 2023-03-03
出版日期:

文章二維碼

您是第位訪問(wèn)者
氣象科學(xué) ® 2026 版權(quán)所有
技術(shù)支持：北京勤云科技發(fā)展有限公司

抽查舔水白紧大视频,冲喜娘子超甜哒激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说

引用本文

分享

相關(guān)視頻

文章指標(biāo)

歷史

文章二維碼

抽查舔水白紧大视频,冲喜娘子超甜哒 激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说

引用本文

分享

相關(guān)視頻

文章指標(biāo)

歷史

文章二維碼

抽查舔水白紧大视频,冲喜娘子超甜哒激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说