摘要
根据阿拉尔气象站1961-2000年日平均气温资料,求其逐年初终霜日及无霜期持续天数,用最小二乘法分析时间序列变化特征及趋势。结果表明:近40a新疆阿拉尔垦区初霜日提前,终霜日推后,无霜期持续天数以0.359d/10a的不显著趋势减少;初终霜日及无霜期持续天数年际差异不明显,变化相对稳定。结论:鉴于无霜期持续天数缩短,种植业品种选择应以早熟为主。
According to the daily average temperature material of Alar irrigated area 1961-2000 the first and last frost dates and the frost-free periods were calculated.Using least squares method time sequence change characteristic and tendency were analyzed.The results indicated： Near 40a first frost date of Xinjiang Alar irrigated area was ahead of time,the last frost date retarded,frost-free period reduced by the 0.359d/10a;Initially the difference of last frost date and the frost-free period among years was not obvious,its change was relatively stable.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2011年第9期183-186,共4页
Journal of Arid Land Resources and Environment
基金
国家软科学研究计划(2006GXQ3D172)子课题资助
关键词
阿拉尔垦区
初终霜日
无霜期
变化
Alar irrigated area
first and last frost dates
frost-free periods
climate change
