贵州旱涝变化特征及其与西太平洋副高和海温的联系

doi:10.11755/j.issn.1006-7639（2016）-03-0440

干旱气象

贵州旱涝变化特征及其与西太平洋副高和海温的联系

陈军¹，李小兰²，喻义军³，滕林⁴

1.贵州省铜仁市气象局，贵州铜仁554300；2.贵州省玉屏县气象局，贵州玉屏554000；
3.贵州省印江县气象局，贵州印江555200；4.贵州省剑河县气象局，贵州剑河556400

出版日期:2016-06-30 发布日期:2016-06-30
作者简介:陈军（1990-），男，主要从事短期天气预报以及中长期气候的研究. E-mail：djcj123@163.com

Variation Features of Drought and Flood in Guizhou Province and Their Relationships with WPSH and SST

CHEN Jun¹, LI Xiaolan², YU Yijun³, TENG Lin⁴

1.Tongren Meteorological Bureau of Guizhou Province, Tongren 554300, China;
2. Yuping Meteorological Station of Guizhou Province, Yuping 554000, China;
3. Yinjiang Meteorological Station of Guizhou Province, Yinjiang 555200,China;
4. Jianhe Meteorological Station of Guizhou Province, Jianhe 556400,China

Online:2016-06-30 Published:2016-06-30

摘要/Abstract

摘要：

利用国家气象信息中心整编的全国753站中贵州省16站逐日观测资料、NCEP/NCAR再分析资料以及NOAA的月平均海表温度资料，采用经验正交函数（EOF）展开、Morlet小波分析等方法对基于标准化降水指数（SPI）的贵州省旱涝时空分布特征进行研究，并分析贵州旱涝异常时的环流特征及与全球海表温度的关系。结果表明：（1）贵州SPI的各季节主模态空间分布均为全区一致型，春秋两季还表现出一定的干旱化趋势；春季和秋季的旱涝分布存在2 a、10 a左右的振荡周期，而夏季和冬季的振荡周期则以2 a、3 a及5 a左右为主；（2）春秋两季，当西太平洋副热带高压主体强度偏强（弱）、位置偏西（东）时，贵州地区降水偏少（多），易发生干旱（洪涝）；而冬夏两季，当西太平洋副热带高压主体偏北（南）、位置偏东（西）时，贵州地区降水偏少（多），易发生干旱（洪涝）；（3）贵州秋季SPI与前期、同期东印度洋—西太平洋区域的海温存在显著的负相关。

关键词: 贵州省, 旱涝分布, 西太平洋副高, 海表温度, 相关性

Abstract:

Based on the daily observation data of 16 stations of Guizhou Province from the National Meteorological Information Center, the reanalysis data from NCEP/NCAR and the global SST (Sea Surface Temperature) data from NOAA, the spatial and temporal distribution of drought and flood based on SPI in Guizhou Province was analyzed by using EOF and Morlet wavelet analysis methods, firstly. And the atmospheric circulation in abnormal drought/flood years in Guizhou Province and relationship between SPI and global SST were also researched. The results are as follows: (1) The consistent anomaly distribution was the main spatial model of drought/flood variation feature in Guizhou Province in each season, and in spring and summer it presented drought trend in some extent. The drought/flood in spring and autumn had a two-year and ten-year periodic fluctuation, while in summer and winter there was two-year, three-year and five-year periodic fluctuation. (2) If the Western Pacific subtropical high (WPSH) became stronger (weaker) and westward (eastward), there was less (more) rainfall, and drought (flood) would happen in spring and autumn. If the WPSH was southward (northward) and its position was eastward (westward), then there was less (more) rainfall, and drought (flood) would appear in winter and summer. (3)The autumn SPI had a significant negative correlation with global SST during the previous period and the corresponding period. The key area was the eastern Indian ocean and the western Pacific.

Key words: Guizhou Province, distribution of drought and flood, the Western Pacific subtropical high;sea surface temperature, correlation

中图分类号:

P426.61+4

陈军，李小兰，喻义军，滕林. 贵州旱涝变化特征及其与西太平洋副高和海温的联系[J]. 干旱气象, DOI: 10.11755/j.issn.1006-7639（2016）-03-0440.

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贵州旱涝变化特征及其与西太平洋副高和海温的联系

Variation Features of Drought and Flood in Guizhou Province and Their Relationships with WPSH and SST

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