Extreme Antarctic Cold of Late Winter 2023

作     者：Anastasia J.TOMANEK David E.MIKOLAJCZYK Matthew A.LAZZARA Stefano DI BATTISTA Minghu DING Mariana FONTOLAN LITELL David H.BROMWICH Taylor P.NORTON Linda M.KELLER Lee J.WELHOUSE Anastasia J.TOMANEK;David E.MIKOLAJCZYK;Matthew A.L AZZARA;Stefano DI BATTISTA;Minghu DING;Mariana FONTOLAN LITELL;David H.BROMWICH;Taylor P.NORTON;Linda M.KELLER;Lee J.WELHOUSE

作者机构：Antarctic Meteorological Research and Data CenterSpace Science and Engineering CenterUniversity of Wisconsin-MadisonMadisonWisconsin 53706USA Department of Physical SciencesSchool of EngineeringScienceand MathematicsMadison Area Technical CollegeMadisonWisconsin 53704USA Meteogiornalevia Paolo Diacono9Milano 20133Italy State Key Laboratory of Severe WeatherChinese Academy of Meteorological SciencesBeijing 100081China Byrd Polar and Climate Research CenterThe Ohio State UniversityColumbusOhio 43210USA Department of GeographyThe Ohio State UniversityColumbusOhio 43210USA 

出 版 物：《Advances in Atmospheric Sciences》 (大气科学进展（英文版）)

年 卷 期：2024年第41卷第10期

页      面：1873-1880页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0705[理学-地理学] 070501[理学-自然地理学] 0706[理学-大气科学] 

基　　金：support from the US National Science Foundation(Grant Nos.1924730 2301362 and 2205398) 

主　　题：Antarctica extreme cold temperature automatic weather station networks 

摘      要：Extreme cold temperatures were observed in July and August 2023,coinciding with the WINFLY(winter fly-in)period of mid to late August into September 2023,meaning aircraft operations into McMurdo Station and Phoenix Airfield were adversely ***,with temperatures below−50℃,safe flight operation was not possible because of the risk of failing hydraulics and fuel turning to gel onboard the *** cold temperatures were measured across a broad area of the Antarctic,from East Antarctica toward the Ross Ice Shelf,and stretching across West Antarctica to the Antarctic Peninsula.A review of automatic weather station measurements and staffed station observations revealed a series of sites recording new record low *** separate cold phases were identified,each a few days in duration and occurring from mid-July to the end of August 2023.A brief analysis of 500-hPa geopotential height anomalies shows how the mid-tropospheric atmospheric environment evolves in relation to these extreme cold *** monthly 500-hPa geopotential height anomalies show strong negative anomalies in *** of composite geopotential height anomalies during each of the four cold phases suggests various factors leading to cold temperatures,including both southerly off-content flow and calm atmospheric *** the atmospheric environment that leads to such extreme cold temperatures can improve prediction of such events and benefit Antarctic operations and the study of Antarctic meteorology and climatology.