气候变化领域集成服务门户(CCPortal): Northern Hemisphere land monsoon precipitation changes in the twentieth century revealed by multiple reanalysis datasets

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DOI	10.1007/s00382-019-04982-z
	Northern Hemisphere land monsoon precipitation changes in the twentieth century revealed by multiple reanalysis datasets
	Huang X.; Zhou T.; Zhang W.; Jiang J.; Li P.; Zhao Y.
发表日期	2019
ISSN	0930-7575
起始页码	7131
结束页码	7149
卷号	53 期号:11
英文摘要	Observations are required to understand monsoon changes over time. Reanalyses are useful supplements to observations; however, their ability to reveal long-term monsoon changes remains unknown. Here, we evaluate against observations the performance of two reanalysis datasets covering the whole twentieth century, the ECMWF reanalysis of the twentieth century (ERA20C) and the Twentieth Century Reanalysis Project (20CR), in terms of reproducing the climatological averages, the centennial co-variation, and long-term trends of Northern Hemisphere land monsoon rainfall (NHLMR). Their performance is compared with three other widely used reanalyses, the NCEP–NCAR reanalysis (NCEP1), the ECMWF 40-year reanalysis (ERA40), and the Japanese 55-year Reanalysis Project (JRA55), for the period after 1955. Results show that the five reanalysis datasets reasonably reproduce the climatological NHLMR and NHLM domains. The leading co-variation mode of NHLMR, with an overall increasing tendency before 1955 and a decreasing tendency afterwards, is captured by the corresponding principal components of the two long-term datasets, with some spatial biases. For the long-term precipitation trends, both the ERA20C and 20CR reproduce the increasing trend during 1901–1955, except for parts of the North African (NAF) monsoon region. However, neither dataset captures the decreasing trend of NHLMR after 1955 because of limitations in the NAF and North American (NAM) monsoon region. The NCEP1, ERA40, and JRA55 datasets also have shortcomings in the NAM region. An overall decreasing NHLMR is only shown in the NCEP1 dataset. A moisture budget analysis reveals that the long-term trends of NHLMR are dominated by the dynamic component of moisture convergence, suggesting a prominent role for atmospheric circulation changes. The influence of residual terms related to observations assimilated in the reanalyses is also discussed. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Long-term changes; Moisture budget analysis; Northern Hemisphere land monsoon rainfall; Reanalysis data
语种	英语
scopus关键词	atmospheric circulation; data set; long-term change; Northern Hemisphere; precipitation assessment; trend analysis; twentieth century; North Africa; North America
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145806
作者单位	LASG, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing, 100029, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Huang X.,Zhou T.,Zhang W.,et al. Northern Hemisphere land monsoon precipitation changes in the twentieth century revealed by multiple reanalysis datasets[J],2019,53(11).
APA	Huang X.,Zhou T.,Zhang W.,Jiang J.,Li P.,&Zhao Y..(2019).Northern Hemisphere land monsoon precipitation changes in the twentieth century revealed by multiple reanalysis datasets.Climate Dynamics,53(11).
MLA	Huang X.,et al."Northern Hemisphere land monsoon precipitation changes in the twentieth century revealed by multiple reanalysis datasets".Climate Dynamics 53.11(2019).