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栾兆擎;章光新;邓伟;胡金明;周德民;
LUAN Zhao-qing1, ZHANG Guang-xin1, DENG Wei2,3, HU Jin-ming4, ZHOU De-min1(1. Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, China; 2. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences; 3. Graduate School of Chinese Academy of Sciences; 4. Asian International River Center of Yunnan University)
摘要: 运用趋势系数和气候倾向率分析了松嫩平原地区50a来气温及降水的时空变化规律。结果表明,50a来本区气温有显著上升趋势,平均气温以0.3487℃/10a幅度升高。全年各月气温均呈上升趋势,但是冬春季升温剧烈,达0.5754℃/10a;夏秋季较弱,仅为0.1868℃/10a。由于最冷月平均温度升高比最热月大,导致气温年较差减少。气温升高存在显著的区域差异,平原西北部地区增温强烈,气温倾向率大于0.45℃/10a;平原东部地区气温倾向率较低,小于0.20℃/10a。全区降水总体趋势性变化不显著,但还是呈现弱的减少趋势,平均年降水量倾向率为-0.0783mm/10a,且秋季降水减少明显。