沙漠与绿洲气象2023，Vol.17Issue(6)：60-66,7.DOI:10.12057/j.issn.1002-0799.2023.06.008
增暖背景下2023年4-5月新疆低温维持机制分析
Mechanisms for Maintenance of Low Temperature in Xinjiang in April-May 2023 under the Background of Climate Warming
摘要
Abstract
In the spring of 2023,the average air temperature in Xinjiang varied significantly in stages,and the average air temperature in April-May was the second lowest in history in the same period of the recent 20 years,and it was rare to have two consecutive months of low air temperature in spring against the background of warming.Based on the 2023 spring temperature data from 89 stations in Xinjiang and the large-scale circulation reanalysis data,the maintenance mechanism of abnormally low temperature in April-May 2023 in Xinjiang was analyzed.The results showed that the low temperatures in April-May in Xinjiang were mainly affected by three cold wave processes,the southward invasion and dominance of strong cold air,the pressure gradient force formed by the positive and negative anomalous centers of sea level pressure in the middle and high latitudes of Eurasia,the enhanced Eurasian cold high,the development of the long-wave trough ridge systems,the mid-level guiding airflow and other factors enhanced the cold air force;the weakening of the low-level westerly airflow and the anomalous intensification of the northwesterly airflow,as well as the anomalous anticyclonic and cyclonic distribution over continental Europe and Mongolia to Central Siberia,contributed to the intensification of the southward invasion of cold air;the anomalous strengthening of the key factors of the region,and the prolonged maintenance of the Siberian trough made the cold air entrenched in Xinjiang,which was an important reason for the persistently low temperature in Xinjiang from April to May.关键词
异常低温/新疆/大气环流/维持机制Key words
abnormal low temperature/Xinjiang/atmospheric circulation/maintenance mechanism分类
天文与地球科学引用本文复制引用
刘艳,郑育琳,刘精,陈颖..增暖背景下2023年4-5月新疆低温维持机制分析[J].沙漠与绿洲气象,2023,17(6):60-66,7.基金项目
新疆维吾尔自治区自然科学基金面上项目(2021D01A149) （2021D01A149）
新疆维吾尔自治区自然科学基金项目(2021D01B83) （2021D01B83）
安徽省创新发展专项面上项目(CNM202110) （CNM202110）
新疆气象科技创新发展基金项目(MS202207) （MS202207）
