干旱区生态环境知识资源中心(Arid): 中国西南和华南地区春旱的气候变化特征

Arid

	中国西南和华南地区春旱的气候变化特征
其他题名	Climate change characteristics of the spring drought in southwest - south China
	陈少勇 1; 贺红梅 2; 吴芳蓉 2; 李常德 3
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2015
卷号	29 期号:9 页码:138-143
中文摘要	利用我国西南和华南131个测站,近50a降水资料和NECP资料,采用线性趋势分析、合成分析等方法,利用季尺度降水距平百分率将春旱分为无旱、轻旱、中旱、重旱和特旱五个级别,分析了近50a我国西南和华南地区各级别干旱的空间分布及时间变化特征。结果表明:在这一区域中,每一个级别的干旱都有从东向西站点增多的分布趋势,干旱程度从东向西加强,重旱、特旱集中出现在川西南-滇北、两广南部;轻旱和中旱具有"降升降"的年代际变化: 1960s - 1970s中期减少,1970s后期- 1990中期增多,1996年迅速减少,进入本世纪后轻旱缓慢增多;重旱和特旱显著减少,1963年是近50a干旱最重的一年。各级别的干旱具有4 - 6a的周期;从700hPa高度场和垂直速度场上初步分析讨论了产生干旱以及干旱分布的原因。
英文摘要	By using nearly 50a precipitation data and NECP data of 131 stations in southwest and south China, and the linear trend analysis,synthesis analysis and other methods,the spring droughts were divided into no drought dry,light dry,medium dry,heavy drought and special drought five levels according to season - scale precipitation anomaly percentage. The spatial and temporal distribution characteristics of all levels of droughts nearly 50a were analyzed. The results showed that in this areas,each level of drought had increased from east to west; severe drought and special heavy drought concentrated in southwestern Sichuan - northern Yunnan, southern Guangdong and southern Guangxi; mild drought and the drought had a " down - drop - down" decadal variability,they were reduced from 1960s to mid - 1970s,increased in the late 1970s to mid - 1990s,and rapidly reduced in 1996,followed by slowly increasing. Severe drought and light drought had a significant reduction. 1963 was the heaviest year of drought in 50 years,followed by 1969,1979 and 1995. The distributions of arid and arid reasons were discussed from 700hPa height field and vertical velocity field.
中文关键词	春旱 ; 气候变化 ; 级别 ; 季尺度降水 ; 西南和华南
英文关键词	spring drought climate change drought level season - scale precipitation southwest - south China
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:5513602
来源机构	中国气象局兰州干旱气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232806
作者单位	1.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;;我国气象局干旱气候变化与减灾重点开放实验室, 兰州, 甘肃 730020, 中国; 2.白银市气象局, 白银, 甘肃 730900, 中国; 3.平凉市气象局, 平凉, 744000
推荐引用方式 GB/T 7714	陈少勇,贺红梅,吴芳蓉,等. 中国西南和华南地区春旱的气候变化特征[J]. 中国气象局兰州干旱气象研究所,2015,29(9):138-143.
APA	陈少勇,贺红梅,吴芳蓉,&李常德.(2015).中国西南和华南地区春旱的气候变化特征.干旱区资源与环境,29(9),138-143.
MLA	陈少勇,et al."中国西南和华南地区春旱的气候变化特征".干旱区资源与环境 29.9(2015):138-143.