干旱区生态环境知识资源中心(Arid): Spatiotemporal Drought Variation in Midlatitude East Asia Over the Past Half Millennium

Arid

DOI	10.1029/2022JD037793
	Spatiotemporal Drought Variation in Midlatitude East Asia Over the Past Half Millennium
	Deng, Yang; Gao, Linlin; Gou, Xiaohua
通讯作者	Deng, Y
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN	2169-897X
EISSN	2169-8996
出版年	2023
卷号	128 期号:6
英文摘要	Drought is a recurring challenge, especially in the arid and semi-arid regions. Therefore, understanding its spatial and temporal variation is important for pre-disaster planning and sustainable water resource management during drought. However, the sparse and short length of the instrumental records in midlatitude East Asia hampered the full understanding of drought variation, especially at multidecadal and longer timescales. Here, we compiled a tree-ring network of 364 chronologies in midlatitude East Asia and reconstructed the variation of the averaged May-August Standardized Precipitation Evapotranspiration Index at a spatial resolution of 0.5 degrees x 0.5 degrees, for the period 1501-2000 CE. The reconstruction captured the spatial and temporal variation of actual drought well and has a strong association with a drought atlas that was derived from historical documents. The study area has experienced an expansion of dry areas during the past decades; however, it is still within the natural variability of the past half millennium. According to drought variation during the instrumental period, the study area was divided into four subregions; however, running correlations showed that drought variation in some subregions was similar in past centuries, except in recent decades. This study provides new data for understanding the spatiotemporal variability of drought in midlatitude East Asia, and the vanished correlation between drought variation in some regions during the past decades indicates the complex forcing mechanism of regional drought variation. Plain Language Summary We present a 500-year drought reconstruction for midlatitude East Asia with a spatial resolution of 0.5 degrees x 0.5 degrees, by using a tree-ring network of 364 chronologies. Based on this reconstruction, we found that the recent dry area expansion in midlatitude East Asia is still within the range of natural variability of the past 500 years. Our results also showed that, except for the past several decades, the drought variation in some subregions was significantly correlated.
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000973606100001
WOS关键词	QILIAN MOUNTAINS ; TIBETAN PLATEAU ; ARIDITY CHANGES ; TREE GROWTH ; CLIMATE ; RECONSTRUCTION ; PRECIPITATION ; CHINA ; VARIABILITY ; 20TH-CENTURY
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397349
推荐引用方式 GB/T 7714	Deng, Yang,Gao, Linlin,Gou, Xiaohua. Spatiotemporal Drought Variation in Midlatitude East Asia Over the Past Half Millennium[J],2023,128(6).
APA	Deng, Yang,Gao, Linlin,&Gou, Xiaohua.(2023).Spatiotemporal Drought Variation in Midlatitude East Asia Over the Past Half Millennium.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,128(6).
MLA	Deng, Yang,et al."Spatiotemporal Drought Variation in Midlatitude East Asia Over the Past Half Millennium".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 128.6(2023).