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新疆北部积雪对地生态学的作用研究
Authors
刘明哲
叶玮
+5 more
姜逢清
张丽旭
穆桂金
高卫东
魏文寿
Publication date
1 January 2002
Publisher
Abstract
通过对北疆地区的积雪与消融和积雪对荒漠植物萌发和生长作用研究以及多年最大积雪深度时间序列的观测分析,结果表明:北疆地区积雪主要受大陆性气候的影响,积雪性质表现为含水率小,密度低和抗压强度小的特征,积雪变化过程以热力作用为主,重力作用为辅,与海洋性气候条件形成的积雪具有明显的差异;北疆地区是入冬先形成季节性冻土,后形成稳定积雪。但是积雪与冻土消融始尽同时产生,因此积雪的积累和消融期集中,这对北疆荒漠短命植物与沙生植物的春季萌发和生长期的水分供给具有重要作用;根据北疆最大积雪深度年际变化与气候变化序列的相关分析,该区气候变暧气温升高,主要是冬季升温比较明显,而降水增加则以暴雨(雪)为主
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Last time updated on 29/11/2016