干旱地区农业研究2011，Vol.29Issue(2)：276-280,5.
近50年辽宁无霜期积温时空演变特征
Analysis of spatio-temporal evolvement characteristics of frostless period accumulated temperature in Liaoning in recent 50 years
摘要
Abstract
Based on the data of daily mean temperature of Liaoning Province in the recent 50 years ( 1961 ～ 2007),and using GIS technique, analysis is made of different time scale of spatio-temporal evolvement characteristics of frostless period accumulated temperature (FIPAT) in Liaoning in recent 50 years. The results demonstrate that in terms of regional average, the FLPAT whose the largest variability is larger than 600℃ .d varies evidently between years and increases significantly with a rate of increase of 85℃·d/10a in recent 50 years and mainly after 1990s. The largest rate above 90℃ .d/10a distributes in the south of west Lianning and south of central plain. The smallest rate below 60℃ .d/10a distributes in most parts of east mountainous area and the west of west Liaoning. The west of east mountainous area and northwest of west Liaoning are the places whére the FLPAT increases unsignificently. Comparing the B period from 1971 ～ 2000 with the A period from 1961 ～ 1990, except for center and west of east mountainous area as well as the west of west Liaoning where the FLPAT decreases slightly, the climatology of the FLPAT which decreases progressively from south above 2 700℃·d to north below I 800℃·d increases in most parts of Liaoning, especially in the north of east mountainous area, most parts of west Liaoning, most parts of cental plain and part of Dalian where the rate of increase of the FLPAT above 60℃·d is the largest. In term of interannual change, the scope area with high value of above 2 600℃·d expands to northeast from surrounding Bohai zone and reaches the peak after 2000, covering middle Liaoning, most parts of west Liaoning and north Liaoning as well as south Liaoning.关键词
辽宁/无霜期积温/时空演变/GIS技术Key words
Liaoning/ frostless period accumulated temperature (FLPAT)/ spatio-temporal evolvement characteristics/ GIS technique分类
农业科技引用本文复制引用
明惠青,唐亚平,孙婧,关键华..近50年辽宁无霜期积温时空演变特征[J].干旱地区农业研究,2011,29(2):276-280,5.基金项目
科技部公益行业专项(GYHY200906027) （GYHY200906027）
