莫索湾地区农业气候资源的变化特征分析

Analysis of Change of Agricultural Climatic Resources in Mosuowan District

对1959-2007年莫索湾地区平均气温和降水资料的变化特征进行统计分析。结果表明:(1)莫索湾地区48a来气温呈明显上升趋势,尤以近10a的升温最为明显。四季平均气温总体呈上升趋势,秋季增温最为明显,其次是冬季。(2)年降水量呈上升趋势,特别是20世纪90年代-21世纪初降水量增加更为明显,近10a平均降水量比48a均值偏多24.98%。四季以夏季降水最多,春季次之,冬季最少。进一步分析了影响农业生产的布局和结构的无霜期、0℃、10℃、15℃、20℃积温的变化规律等。为合理利用农业气候资源,科学制定农业发展规划、指导地区农业生产提供依据。

By analyzing the change of mean air temperature and precipitation from 1959 to 2007 in Mosuowan district.The results showed that the air temperature increased obviously in past 48 years,especially in recent 10 years.The mean air temperature in 4 seasons increased,especially in autumn and winter.The annual precipitation also increased obviously from 1990s to the beginning of this century.The mean precipitation of last decade was 24.98% more than that of last 30 years(1971-2000).In 4 seasons,summer had the most precipitation,following spring and winter.Further analysis showed the change frost-free duration,accumulated temperature of 0℃,10℃,15℃ and 20℃.The results could provide evidences for making use of agricultural climatic resources reasonably,making scientific agricultural development plan and guiding the agricultural production in the district.