近50年我国霜期的时空分布及变化趋势分析  

The Spatial and Temporal Characteristics and Trend of Frost Days over China for the Past 50 Years

作　　者：王国复[1] 许艳[2] 朱燕君[1] 张洪政[1] 廖捷[1] 

机构地区：[1]国家气象信息中心,北京100081 [2]南京信息工程大学

出　　处：《气象》2009年第7期61-67,共7页Meteorological Monthly

基　　金：科技部国家科技基础条件平台工作专项(2005DKA31700)

摘　　要：利用国家气象信息中心最新整编的1954—2003年中国677个站霜的气象观测资料,分析了我国霜期的地理分布特征,揭示了近50年来我国不同地域霜期的变化趋势和年代际变化特征,探讨了气候变暖背景下霜期的响应。研究表明,除极少数地区外,我国霜期呈缩短的趋势,并且霜期显著缩短发生在20世纪90年代以后;近50年全国大部分地区的初霜日期呈推迟趋势而终霜日期呈提前趋势,这可能与日最低气温、日最低0cm地温的不断升高有关,而初霜日期的推迟和终霜日期的提前最终导致霜期的缩短。Based on the 677 stations daily observation data（ 1954-2003）of frost in China as long and new as possible, which were processed by the National Meteorology Information Center, the distribution of the frost days in China is analyzed, the spatial-temporal trend of regional frost days and the inter-decadal variation features are obtained, and the response of frost to global warming is further discussed. The results indicate an obvious reduction trend of frost days in the whole China, especially in 1990s. We can also find that the earlier last frost day and the later first frost day are related with the rising daily minimum temperature and ground temperature, which will possibly cause the reduction of frost season.

关 键 词：霜期 时空分布特征 线性趋势 日最低气温 日最低0cm地温 

分 类 号：P426.613[天文地球—大气科学及气象学] S761.3[农业科学—森林保护学]