| 佟欣怡,刘艳,张婧莉,吴秀兰,刘精,张同文.1961-2023年新疆区域冷空气过程强度特征[J].沙漠与绿洲气象,2024,18(5):106~112 |
| 1961-2023年新疆区域冷空气过程强度特征 |
| Research on the Intensity of Regional Cold Air Processes in Xinjiang During 1961－2023 |
| 投稿时间：2024-02-08 修订日期：2024-04-19 |
| DOI： |
| 中文关键词: 新疆 区域冷空气 强度指数 强度等级 |
| 英文关键词:Xinjiang Regional Cold Air Processes Intensity index Strength grade |
| 基金项目:新疆气象局科技创新基金项目(MS202408) |
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| 中文摘要: |
| 利用1961—2023年新疆105站日平均气温和日最低气温，24 h、48 h、72 h日最低气温降温幅度以及NCEP/NCAR再分析日资料，总结分析新疆区域不同强度冷空气过程的变化特征，探究影响新疆区域冷空气过程的关键环流因子。结果表明，1961—2023年新疆区域共计发生冷空气过程746次，其中中等强度冷空气过程149次，强冷空气过程136次，寒潮过程461次。新疆区域冷空气过程整体呈减少趋势，21世纪后寒潮过程在冷空气过程中所占比率逐渐增加，但新疆区域寒潮过程年平均强度波动不显著。新疆区域发生强寒潮过程的关键因子是乌拉尔山阻塞高压和欧亚冷高压，乌拉尔山阻塞高压和欧亚冷高压强盛时，有利于高纬度冷空气南下，新疆区域易爆发寒潮。 |
| 英文摘要: |
| Based on the datasets of daily average temperature,minimum temperature,minimum temperature drop range of 24 h, 48 h and 72 h, and the NCEP/NCAR reanalysis data at 105 stations in Xinjiang from 1961 to 2023. This paper analyzes the variation characteristics of cold air processes with different intensities in Xinjiang, and explores the key circulation factors that affect the intensity of cold air processes in Xinjiang. The results show that a total of 746 regional cold air processes occurred in Xinjiang from 1961 to 2023, including 149 moderate intensity cold air processes, 136 strong cold air processes and 461 cold wave processes. The overall trend of cold air processes in Xinjiang region is decreasing, and the proportion of cold wave processes in cold air processes is gradually increasing after the 21st century,,However, the annual average intensity fluctuation of the cold wave process in Xinjiang region is not significant.The key factors for the occurrence of a strong cold wave are the Ural Mountains blocking high pressure and the Eurasian cold high pressure.The changes in Ural blocking high and Eurasian cold high are positively correlated with cold air process in Xinjiang. |
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