首页|基于CMIP5的东亚地区降雪量变化特征分析

基于CMIP5的东亚地区降雪量变化特征分析

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利用JMA的JRA-55降雪量及CMIP5的6个模式模拟的降雪量资料,分析了东亚地区降雪量年变化特征及年际变化特征.结果表明:东亚地区降雪量在1958-2004年期间具有明显的年际变化特征及区域分布特征;降雪主要集中在11月至翌年的4月,这6个月中降雪量占年总降雪量的82%;年际变化特征呈现出一种波动变化略有增加的趋势,但是增加的幅度有所不同.从区域分布特征来看,东亚地区降雪主要分布在东北亚、青藏高原及新疆等3个区域.CMIP5的6个模式对东亚区域及其子区域东北亚、青藏高原、新疆1850-2004年降雪量年际变化特征的模拟差异较大.多模式集合预报的结果表现为,在过去155 a(1850-2004年)东亚区域降雪量呈现明显减小趋势,东北亚和青藏高原降雪量为波动略有减小趋势,新疆降雪量为明显增加趋势.
An analysis of the changing characteristics of snowfall in the East Asia based on CMIP5
In this paper,the annual and monthly variations of snowfall in East Asia are analyzed by using snowfalls simulated with CMIP5 model and JRA-55 annual solid precipitation time sequence.It is found that there were obvious annual variation and regional distribution characteristics during the period of 1958-2004.The snowfall concentrated in the period from November to next April mainly,accounting for 82% of the annual snowfall; the annual variation showed a fluctuant increasing tendency,with different increment; spatially,snowfall concentrated in three regions:Northeast Asia,Tibetan Plateau and Xinjiang.The snowfalls simulated by six CMIP5 models had some spatial differences in the East Asia and the three sub-regions during 1850-2004.Temporally,the simulated snowfall presented an evident decreasing tendency in East Asia during the period from 1850 to 2004,with a slight decreasing tendency or an undulation in Northeast Asia and the Tibetan Plateau and an evident increasing tendency in Xinjiang.

East Asiasnowfallannual and monthly variation characteristicsCMIP5

柳媛普、李锁锁、吕世华、高艳红、奥银焕

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中国气象局兰州干旱气象研究所/甘肃省干旱气候变化与减灾重点实验室/中国气象局干旱气候变化与减灾重点实验室,甘肃兰州730020

中国科学院寒区旱区环境与工程研究所寒旱区陆面过程与气候变化重点实验室,甘肃兰州730000

东亚 降雪量 年变化与年际变化特征 CMIP5

国家自然科学基金国家重点基础研究发展计划(973计划)项目国家重点基础研究发展计划(973计划)项目中国科学院“西部之光”人才培养计划博士项目(李锁锁)中国科学院“百人计划”项目(高艳红)干旱气象科学研究基金

412050762013CB9560042010CB950500IAM201409

2014

冰川冻土
中国地理学会 中国科学院寒区旱区环境与工程研究所

冰川冻土

CSTPCDCSCD北大核心
影响因子:2.546
ISSN:1000-0240
年,卷(期):2014.36(6)
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