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气候变暖背景下宁夏暴雨日数的变化
引用本文:陈晓光,郑广芬,陈晓娟,张智.气候变暖背景下宁夏暴雨日数的变化[J].气候变化研究进展,2007,3(2):85-090.
作者姓名:陈晓光  郑广芬  陈晓娟  张智
作者单位:青海省气象局
基金项目:"宁夏气候对全球气候变化的响应及其机制"项目;中国气象局气候变化专项基金
摘    要: 根据宁夏夏季暴雨日数资料、银川探空资料和NCEP再分析资料,分析了气候变暖背景下,宁夏暴雨日数的变化规律和成因。结果表明,气候变暖后年暴雨日数明显增多, 6、7月白昼和夜间的暴雨日数增加,8月白昼的暴雨日数增加而夜间的减少。成因分析结果表明,气候变暖后7、8月白天的大气潜在不稳定性增强,夜间的大气潜在不稳定性7月增强而8月减弱,造成了银川上空大气温度垂直结构的日变化明显,导致了宁夏暴雨日数的增多和暴雨的日变化显著。

关 键 词:气候变化  暴雨日数  大气环流  成因
文章编号:1673-1719(2007)02-0085-06
收稿时间:2006-7-10
修稿时间:2006-07-10

Change of Ningxia Torrential Rain Days Under Climate Warming
Chen Xiaoguang,Zheng Guangfen,Chen Xiaojuan,Zhang Zhi.Change of Ningxia Torrential Rain Days Under Climate Warming[J].Advances in Climate Change,2007,3(2):85-090.
Authors:Chen Xiaoguang  Zheng Guangfen  Chen Xiaojuan  Zhang Zhi
Institution:1 Ningxia Key Laboratory of Meteorological Disaster Preventing and Reducing, Yinchuan 750002, China; 2 Ningxia Meteorological Observatory, Yinehuan 750002, China
Abstract:By using the Ningxia summer torrential rain days data, the Yinchuan sounding data and the NCEP/NCAR reanalyzed data, the evolutional characteristics and the cause of Ningxia torrential rain days are analyzed under the background of climate warming. The results show that both annual torrential rain days and annual mean temperature displayed a consistent trend, which means that with increase in annual mean temperature, the annual torrential rain days also increased obviously. Further analysis results indicate that atmospheric potential instability has been grown in the daytime in both July and August after the climate warming (1986) of Ningxia, but in the nighttime it has been grown in July but decayed in August. Therefore, the climate warming not only caused more obvious diurnal variation of the vertical distribution of atmospheric temperature in Yinchuan, but also resulted in the increase of torrential rain days and in more obvious diurnal variation of the torrential rain in Ningxia.
Keywords:climate change  torrential rain days  atmospheric circulation  formation mechanism  Ningxia
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