摘要
2008年初,湖北省出现了严重的低温雨雪冰冻灾害,直接经济损失高达110亿元以上,有必要对灾害期间的气候特征进行系统、科学的分析和总结。对湖北省76个气象站2008年1月12日~2月3日气温、降水(雪)、日照以及低温持续日数等要素进行时空间差异分析及历史与同期比较,并选取10个代表站历史上所有低温雨雪天气过程,对其过程持续低温日数、最长连续雨雪日数、过程极端低温进行比较分析。结果表明:(1)此次过程的平均气温异常偏低,该省大部为-1^-2℃,比常年同期偏低4~6℃,为各站历史同期最低,其中主要是最高气温异常偏低所致,但极端低温并不低;(2)降雪过程频繁,雨雪量异常偏多;(3)低温冰冻持续时间长,该省大部在16~22d,位于历史第一;(4)日照异常偏少。持续而稳定的大气环流异常形势是湖北省大范围低温雨雪天气的直接原因。
At the beginning of 2008, the severe low temperature and freezing took place in Hubei Province. The direct economic losses caused by the disaster were as much as 110 billion. It is necessary to analyze the climatic features during the period. The spatial-temporal differences and contemporary comparison on the air temperature,precipitation, sunlight and days of the continuous low temperature from 12th January to 3rd February of 2008 at the 78 meteorological stations of Hubei Province were analyzed. The days of con- tinuous low temperature, the largest number of days of continuous rain and snow, and the extreme low temperature of all the recorded low temperature and freezing events at the 10 typical stations were also analyzed. The results show that 1） The mean temperature during the period, -- 1 ℃ -- 2℃ at the most part of Hubei,is abnormally 4-6℃ lower than that of perennial same term and is the lowest record. It is because the maximum temperature was abnormally low, but the minimum temperature was not so low. 2）The snowfall frequently took place and the total rainfall and snowfall was excessive. 3）The low temperature and freezing lasted for 16-22 days at the most parts of Hubei Province,which also set up a new record. 4） The sunlight was abnormally insufficient. The persistent and stable abnormal atmospheric circulation directly leads to the low temperature and freezing at the most parts of Hubei Province.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2009年第3期291-295,共5页
Resources and Environment in the Yangtze Basin
基金
武汉区域气象中心重点科技项目"武汉区域100年气温标准序列研究(QY-Z-200701)"
武汉区域气象中心重点科技项目"武汉区域气候变化关键技术研究(QY-Z-200807)"资助
关键词
低温雨雪冰冻
气候特征
气温
雨雪
极端低温
low temperature and freezing
climatic figure
air temperature
rainfall and snowfall
extreme low temperature
