| 摘要: |
| 利用常规气象观测资料以及NCEP再分析资料，通过对实况资料、环流背景、气候背景的研究，对2008年和2022年年初贵州省低温雨雪冻雨天气过程进行对比分析。结果表明：2022年冷空气强度与2008年相比偏弱，最低气温比2008年偏高2.7 ℃；日平均降雪站数接近2008年略偏少，达到了2008年的91%；日平均冻雨站数与2008年相比明显偏少，仅达到2008年的29%，2022年最大雪深超过了2008年。两次低温雨雪天气的成因共同点是：拉尼娜事件的影响；副高、欧亚阻高异常偏强以及中亚、西亚低值系统活跃，持续大量暖湿空气向北输送水汽；不同点是：2022年鄂霍次克海低涡强度偏弱。在两次低温雨雪持续期间，副高异常增强、北抬，欧亚阻高形势稳固，北极明显升温，持续的水汽输送和逆温存在，为这两次雨雪冰冻灾害提供重要的环流背景。 |
| 关键词: 低温雨雪；冻雨；拉尼娜；逆温 |
| DOI： |
| 投稿时间：2023-03-23修订日期：2023-07-25 |
| 基金项目: |
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| Comparative Analysis of Cryogenic Freezing Rain and Snow Weather in 2008 and 2022 in Guizhou Province |
| wangxingju |
| (Meteorological Bureau of Anshun City) |
| Abstract: |
| Based on the conventional meteorological observation data and NCEP reanalysis data, the cryogenic freezing rain and snow weather in 2008 and 2022 in Guizhou Province were comparatively analyzed through the study of the actual data, the circulation background and the climate background. The results showed that, the intensity of cold air in 2022 was weaker than that in 2008, and the lowest air temperature was 2.7 ℃ higher than that in 2008; the daily average number of snowfall stations was slightly less than that of 2008, reaching 91% of 2008; compared with 2008, the daily average number of freezing rain stations was obviously less, only reaching 29% of 2008, but the maximum snow depth in 2022 was higher than that in 2008. The common causes of the two low-temperature rain and snow weather were: the influence of La Nina event, abnormally strong subtropical high, Eurasian resistance high and active low value system in Central and Western Asia, continuous large amount of warm and wet air transported northward . The difference was that the low vortex in Okhotsk sea in 2022 was weaker. During the two periods of cryogenic freezing rain and snow weather, the subtropical high was abnormally strengthened and lifted northward, the blocking high in Eurasia was stable, the temperature in the Arctic increased obviously, and the water vapor continuously transported and temperature inversion existed, which provided an important circulation background for the two freezing rain and snow weather. |
| Key words: Cryogenic rain and snow ; Freezing rain; La Nina; Temperature inversion |
