摘要
用线性趋势和单相关法分析了青海高原33个气象站的霜物候期及气象资料,结果表明:青海高原1978～2007年初霜、终霜变化趋势存在明显推迟、提早的区域性特征。在年代际尺度上,初霜大部分地区明显推迟,终霜大部分地区明显提早,无霜期绝大部分地区明显延长。少部分地区终霜对气温负相关显著,对降水正相关显著。部分地区初霜对气温正相关显著,绝大部分地区初霜对降水略呈增多变化响应不明显。大部分地区无霜期对气温为正相关显著,且对气温的响应比对降水的明显;初霜、终霜对气候变化的综合响应表现在无霜期的延长变化趋势存在明显的区域性差异。
The frost phenophase was anaylysed with linear trend and single correlation method by using meteorological data from 33 weather stations in Qinghai Plateau.Results show that the variation trends of first frost and latest frost present regional features of delay and ahead of schedule,respectively.On the interdecadal scale,first frost was delayed while latest frost was advanced and frost-free period was extended obviously in most regions.In a few areas,a negative correlation existed between latest frost with air temperature,and a positive correlation with precipitation.In some areas,a positive correlation existed between first frost with air temperature,and had no obvious responses to precipitation.In most areas,a positive correlation existed between frost-free period with air temperature and precipitation.The comprehensive response of first frost and latest frost to climate change showed that the extened variation trends have obvious regional differences.
出处
《气候与环境研究》
CSCD
北大核心
2011年第3期347-352,共6页
Climatic and Environmental Research
基金
中国气象局成都高原气象开放实验室基金LPM2008008
关键词
霜
物候现象
变化特征
气候响应
frost
phenological phenomena
variation characteristic
climate response
