近50多年来我国西部地区降水的时空变化特征

doi:10.7522/j.issn.1000-0240.2013.0131

冰川冻土 ›› 2013, Vol. 35 ›› Issue (5): 1165-1175.doi: 10.7522/j.issn.1000-0240.2013.0131

近50多年来我国西部地区降水的时空变化特征

郭慧^1,2, 李栋梁³, 林纾⁴, 董彦雄⁵, 孙兰东⁴, 黄蕾诺¹, 林婧婧⁴

1. 中国气象局兰州干旱气象研究所/甘肃省干旱气候变化与减灾重点实验室/中国气象局干旱气候变化与减灾重点实验室, 甘肃兰州 730020;
2. 甘肃省气象局, 甘肃兰州 730020;
3. 中国科学院寒区旱区环境与工程研究所, 甘肃兰州 730000;
4. 西北区域气候中心, 甘肃兰州 730020;
5. 平凉市气象局, 甘肃平凉 744000

收稿日期:2013-02-10 修回日期:2013-05-27 出版日期:2013-10-25 发布日期:2013-11-07
作者简介:郭慧(1968-),女,陕西兴平人,高级工程师,2008年在中国科学院寒区旱区环境与工程研究所获博士学位,现主要从事气候变化及其影响研究评估工作.E-mail:guoh_lz@sina.com
基金资助:
国家自然科学基金项目(40675066);甘肃省科技支撑计划项目(1011FKCA098)资助

Temporal and Spatial Variation of Precipitation over Western China During 1954-2006

GUO Hui^1,2, LI Dong-liang³, LIN Shu⁴, DONG Yan-xiong⁵, SUN Lan-dong⁴, HUANG Lei-nuo¹, LIN Jing-jing⁴

1. Institute of Arid Meteorology, China Meteorological Administration/Key Laboratory of Arid Climatic Change and Disaster Reduction of Gansu Province/Key Laboratory of Arid Climate Change and Disaster Reduction of China Meteorological Administration, Lanzhou Gansu 730020, China;
2. Gansu Meteorological Bureau, Lanzhou Gansu 730020, China;
3. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China;
4. Regional Climate Center of Northwest China, Lanzhou Gansu 730020, China;
5. Pingliang Meteorological Bureau, Pingliang Gansu 744000, China

Received:2013-02-10 Revised:2013-05-27 Online:2013-10-25 Published:2013-11-07

摘要/Abstract

摘要： 利用1954-2006年我国西部225个气象站的年平均降水量资料, 应用经验正交函数和旋转经验正交函数方法将我国西部分为9个降水类型, 研究了我国西部地区降水的时空变化特征. 结果表明: 南疆盆地、甘肃河西西部和内蒙古西部是我国西部降水年际间变动最大、降水最不稳定的地区, 而四川省西部地区的降水年际变动最小、降水比较稳定. 1954-2006年我国西部地区降水总体呈增加的趋势, 降水空间分布大致以100°E为界, 以西降水增加明显, 以东降水减少. 降水量显著增加的区域是南疆型, 而西北地区东部的关中型的降水减少最为显著. 1980年代中期是我国西部大部分地区降水量变化的转折期. 我国西部的降水变化主要分为5种类型, 年降水量变化存在较为显著的准8~9 a和4~5 a的周期振荡.

关键词: 降水, 空间分布, 变化, 中国西部

Abstract: Precipitation data from 225 meteorological stations in western China from 1954 to 2006 are analyzed through the empirical orthogonal function and the rotated empirical orthogonal function. Nine precipitation subregions in western China can be divided. Among them, the subregions of southern Xinjiang, western Hexi Corridor and western Inner Mongolia have prominent change in annual precipitation. The western Sichuan subregion has minor change in annual precipitation. As a whole, precipitation in western China had increased obviously, but in east of 110°E had decreased. It is concluded that there are 5 types of precipitation changing in western China. Precipitation increased evidently in Xinjiang. It is found that there are precipitation changing periods of 8 to 9 years and 4 to 5 years.

Key words: precipitation, spatial distribution, variations, western China

中图分类号:

P426.61

郭慧, 李栋梁, 林纾, 董彦雄, 孙兰东, 黄蕾诺, 林婧婧. 近50多年来我国西部地区降水的时空变化特征[J]. 冰川冻土, 2013, 35(5): 1165-1175.

GUO Hui, LI Dong-liang, LIN Shu, DONG Yan-xiong, SUN Lan-dong, HUANG Lei-nuo, LIN Jing-jing. Temporal and Spatial Variation of Precipitation over Western China During 1954-2006[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2013, 35(5): 1165-1175.

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近50多年来我国西部地区降水的时空变化特征

Temporal and Spatial Variation of Precipitation over Western China During 1954-2006

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