| 贵州省区域性凝冻过程的时空特征分析 |
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| 引用本文： | 任曼琳,李忠燕,谭娅姮,严小冬,张东海.贵州省区域性凝冻过程的时空特征分析[J].高原山地气象研究,2022,42(2):90-95. |
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| 作者姓名： | 任曼琳 李忠燕 谭娅姮 严小冬 张东海 |
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| 作者单位： | 1.贵州省气候中心，贵阳 550002 |
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| 基金项目： | 国家自然科学基金项目（41865005） |
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| 摘 要： | 基于1961~2019 年贵州省84站逐日雨凇观测资料，确定了贵州省区域性凝冻过程指标，并根据新标准对区域性凝冻过程的时空特征进行了分析。结果表明:1961~2019 年贵州省区域性凝冻过程次数与累积天数均呈减少趋势，在年代际时间尺度上均呈 “偏多—偏少—偏多—偏少”的变化特征，在年际时间尺度上均存在7~8a与3~4a的变化周期。贵州省区域性凝冻过程频发区及中心站点高频区主要集中在中部一线，在东北部和南部部分地区发生频率较低。贵州省区域性凝冻过程可分为中东部型、中部型、中西部型、西部型及全省型共5类，其中以中西部型和全省型为主。
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| 关 键 词： | 区域性凝冻过程 指标 时空特征 聚类分析 |
| 收稿时间： | 2021-08-31 |
Temporal and Spatial Characteristics of Regional Freezing Rain Events in Guizhou Province |
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| Institution: | 1.Climate Centre of Guizhou Province, Guiyang 550002, China2.Key Laboratory of the Mountain Climate and Resources of Guizhou Province, Guiyang 550002, China |
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| Abstract: | Based on the daily observation data of 84 stations in Guizhou province from 1961 to 2019, the indicators of regional freezing rain events in Guizhou Province were determined, and the spatial and temporal characteristics of regional freezing rain events were analyzed according to the new standard. The results are as follows: The frequency and cumulative days showed a decreasing trend, and the interdecadal scale was characterized by “positive-negative-positive-negative”. On the interannual scale, there were significant oscillation periods between 7 and 8 years and between 3 and 4 years. The regional freezing rain events occurred most frequently over the central part of Guizhou province, while the occurrence frequency was low over northeastern and southern parts. The regional freezing rain events could be classified into five types, namely, the central and eastern type, the middle type, the middle-western type, the western type, and the whole area type, among which the middle-western type and whole area type were the main types. |
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