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当前位置: 首页 > 文章 > 贵州省降雪分布特点及周期小波分析 湖北农业科学 2021 (S1) 131-134+139
Position: Home > Articles > The distribution characteristics and wavelet analysis of snowfall in Guizhou province Hubei Agricultural Sciences 2021 (S1) 131-134+139

贵州省降雪分布特点及周期小波分析

作  者：
王兴菊;李启芬;白慧;王芬;周文钰;胡秋红
单  位：
贵州省气象台;安顺市气象局;贵州省山地气候与资源重点实验室
关键词：
降雪;小波分析;相关性;贵州省
摘  要：
利用NCEP再分析资料、海温资料,采用Morlet小波分析法,对2000—2018年贵州省的降雪空间、时间分布,周期特点、环流形势特征等进行系统研究。结果表明,整个贵州省降雪呈西北部多、西南部少的趋势,积雪深度全省呈中部多,南部、西南部少的特点;就年降雪日数而言,2008年最多,2017年最少;从月变化来看,1月最多,其次为2月和12月;降雪初日和终日出现最多的都是毕节市威宁县。从小波周期分析来看,降雪发生频次呈现多重时间周期上的复杂嵌套结构,在降雪发生频次演变过程中,存在3～5年的周期变化,在2000—2012年生成4年左右的周期振荡。贵州省的年降雪频次与冬季海温呈明显的负相关;贵州省西部年降雪频次与海温也呈明显的负相关,且相关性好于全省;贵州省东部的年降雪频次与海温无明显相关。贵州省降雪主要受低层切变和暖湿气流输送、地面强冷空气的影响,同时南支槽的动力抬升及槽前西南气流对水汽的输送对贵州省的降雪起重要作用。贵州省高空槽的深度、冷空气路径和低空急流对贵州省降雪强度有重要影响,适当的逆温层、比湿和冷空气强度对贵州省降雪也非常有利。
译  名：
The distribution characteristics and wavelet analysis of snowfall in Guizhou province
作  者：
WANG Xing-ju;LI Qi-fen;BAI Hui;WANG Fen;ZHOU Wen-yu;HU Qiu-hong;Anshun Meteorological Bureau;Key Laboratory of Mountainous Climate and Resources;Guizhou Meteorological Observatory;
关键词：
snowfall;;wavelet analysis;;correlation;;Guizhou province
摘  要：
Based on NCEP reanalysis data,SST data,using wavelet analysis method,the temporal and spatial distribution characteristics,the periodicity characteristic and circulation features of snowfall in Guizhou province from 2000 to 2018 were analyzed. The results showed that the snowfall of Guizhou province was the most in northwest and the least in southwest. The snow depth was the most in central regions and the least in south and southwest. The snowfall days was the most in the year of 2008 and the month of January,and February and December were the second. The least snowfall days was in 2017. The snow started and ended both mostly in Weining county of Guizhou province. By using the wavelet analysis method,it found the snow frequency had the multiple time cycle with the complex nested structure,it usually had 3 to 5 year periodic variations but 4 year from 2000 to 2012. There was a negative correlation between annual snowfall frequency and winter SST in Guizhou province;There was also a negative correlation between annual snowfall frequency and SST in the west of Guizhou,and the correlation was better than that of the whole province;There was no significant correlation between annual snowfall frequency and SST in eastern Guizhou. The snowfall in Guizhou province was mainly affected by the low-level shear,the transport of warm and wet air and the strong cold air on the ground. At the same time,the dynamic uplift of the south branch trough and the transport of water vapor by the southwest airflow before the trough played an important role in the snowfall in Guizhou province. The depth of the upper trough,the cold air path and the low level jet had important effects on the snowfall intensity in Guizhou province,and the appropriate temperature inversion layer,specific humidity and the cold air intensity were also very favorable to the snowfall in Guizhou province.

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