基于EEMD的新疆1971～2013年初、终霜日及霜期变化趋势分析  

Regional features of the first frost dates,last frost dates and frosty variation trends over Xinjiang from 1971 to 2013

作　　者：任妍[1] 赵巧华[2] 刘濛濛 

机构地区：[1]南京信息工程大学,地理与遥感学院,南京210044 [2]南京信息工程大学,水文气象学院,南京210044 [3]新疆巴州气象局,库尔勒841000

出　　处：《干旱区资源与环境》2017年第7期133-138,共6页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金(41371222);青蓝工程;六大人才高峰资助

摘　　要：对国家气象信息中心整编的1971~2013年新疆50个气象站点逐日最低气温资料进行集合经验模态分解,分析新疆初、终霜日及霜期和无霜期的空间分布特征及变化趋势。结果表明:近43a新疆终霜日提前比初霜日推迟更明显,无霜期延长比霜期缩短趋势更显著;初霜日推迟、终霜日提前、霜期延长和无霜期缩短的趋势北疆均比南疆地区更显著;新疆初霜日变化趋势上升型占44%,终霜日变化趋势下降型占44%,霜期变化趋势下降型占72%,无霜期变化趋势上升型占42%。Using the Ensemble empirical mode decomposition methods, based on the 50 meteorological stations daily minimum temperature data observed in Xinjiang during the period from 1971 to 2013, which were processed by the National Meteorology Information Center, the spatial distribution characteristics of the first frost dates, last frost dates, frosty and frost - free period in Xinjiang were analyzed, the tendency of them were classified. The re- sults show that nearly 43 years, the trend of last frost date move up was more obvious than first frost date post- poned tendency, frost -free period shorter was more obvious than the frosty prolonged in Xinjiang; The trend of first frost day delay, last frost date move up, the extension of frost season and frost -free period shorten are more significant in northern of Xinjiang than in southern of Xinjiang region. The first frost dates advance trend showed in 44% of the area over Xinjiang, the last frost dates delay trend showed in 44% of the area, frost period shorten area accounted for 72% of area, frost- free period extended trend showed in 42% of the area.

关 键 词：气候变化 霜期 集合经验模态分解 新疆 

分 类 号：P46[天文地球—大气科学及气象学]