摘要
选用世界气象组织公布的极端气候指数方法对1961—2009年黑龙江省8个极端气温指数进行计算和分析,得到黑龙江省极端气温事件的事实和变化特征。结果表明:黑龙江省近49年来夏日天数、极端最低气温、极端最高气温、暖夜指数和暖昼日数均呈上升趋势,而霜冻日数、冷夜指数和冷昼日数呈下降趋势。极端气温指数的变化存在明显的年际变化特征,并有突变发生。对黑龙江省气温升高来说,最低气温升高主要发生在20世纪80年代中期以后,而最高气温则在90年代以后上升明显。空间分布方面,极端气温指数在全区基本都呈一致的增大或减小分布。夜间增暖的幅度要大于白天增暖的幅度,夜间气温的上升对增暖的贡献更大。
Extreme temperature events in Heilongjiang Province during 1961-2009 and their variation characteristics were evaluated by using the 8 WMO extreme climate indices.The results show that,in recent 49 years,summer days（SU）,extreme minimum temperature（TNN）,extreme maximum temperature（TXX）,warm nights（TN90） and warm days（TX90） displayed a significantly increasing tendency,while frost days（FD）,cold nights（TN10） and cold days（TX10） showed a decreasing tendency.The TNN and TXX had obviously interannual variabilities,and abrupt changes.The increase in TNN mainly occurred after the mid-1980s,while the obvious rising in TXX occurred after 1990.Spatially,extreme temperatures showed a consistent increasing or decreasing tendency over the whole province.The rising of night temperature contributed more to the warming than day temperature.
出处
《气候变化研究进展》
CSCD
2011年第2期110-115,共6页
Climate Change Research
基金
中国气象局气候变化专项(062700S010C01)
公益性行业科研专项(GYHY201106013)
关键词
极端气温指数
时空变化
增暖
黑龙江省
extreme temperature indices
spatiotemporal change
warming
Heilongjiang Province
