Comparisons on characteristics and mechanisms of the decadal megadroughts over eastern China between MCA and LIA

doi:10.1002/joc.6942

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 黄土与第四纪地质国家重点实验室（2010~）

	Comparisons on characteristics and mechanisms of the decadal megadroughts over eastern China between MCA and LIA
	Xue, Jiao 4,6; Ning, Liang 1,2,3,4,5,6; Qin, Yanmin 4,5,6; Chen, Kefan 4,5,6; Yan, Mi 2,3,4,5,6; Liu, Jian 3,4,5,6
刊名	INTERNATIONAL JOURNAL OF CLIMATOLOGY
	2020-12-02
页码	13
关键词	characteristics and mechanisms decadal megadroughts LIA MCA the eastern China
ISSN号	0899-8418
DOI	10.1002/joc.6942
通讯作者	Ning, Liang(ningliangnnu@126.com)
英文摘要	In this study, simulations of 13 all-forcing experiments from the Community Earth System Model Last Millennium Ensemble (CESM-LME) archive were used to investigate the different spatiotemporal characteristics and corresponding mechanisms of the decadal megadroughts over the eastern China during two typical periods in the past millennium, that is, Medieval Climate Anomaly (MCA) and Little Ice Age (LIA). The results show that there is no significant difference in either megadrought intensity or duration between the MCA and LIA, but there are significant differences in the megadrought frequencies. The frequency of megadroughts during the MCA is 1.44 times/hundred years, compared with 1.69 times/hundred years in LIA. Results from solar only sensitivity experiments and volcanic only sensitivity experiments show that this difference is mainly induced by the solar radiation. The mechanism analyses show that a spatial pattern of sea surface temperature anomalies (SSTA) resembling the positive Pacific Decadal Oscillation (PDO)-like pattern have occurred simultaneously with the megadroughts during both the MCA and LIA. While, the megadroughts in MCA are strongly correlated with the strong PDO-like SSTA patterns, and the megadroughts in LIA are strongly correlated with the weak PDO-like SSTA patterns. In addition, the anomalous sea level pressure (SLP) field and wind field associate with the megadroughts during the MCA and LIA are consistent with the strengths of SSTA, with significant larger SLP and wind anomalies during the MCA than those during the LIA. Therefore, it can be concluded that the responses of the large-scale atmospheric circulation patterns to SSTA are similar during these two typical periods, and the difference in the megadrought frequencies is due to the nonlinear response of the precipitation variability to the large-scale atmospheric circulation patterns.
资助项目	National Key Research and Development Program of China[2016YFA0600401] ; State Key Laboratory of Loess and Quaternary Geology[SKLLQG1820] ; State Key Laboratory of Loess and Quaternary Geology[SKLLQG1930] ; National Natural Science Foundation of China[41631175] ; National Natural Science Foundation of China[41671197] ; National Natural Science Foundation of China[41971021] ; National Natural Science Foundation of China[41971108] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB40000000]
WOS关键词	LARGE VOLCANIC-ERUPTIONS ; EXTREME PRECIPITATION ; DROUGHT EVENTS ; CLIMATE-CHANGE ; VARIABILITY ; MILLENNIUM ; MONSOON ; TEMPERATURE ; PATTERNS ; ARIDITY
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	WILEY
WOS记录号	WOS:000595096000001
资助机构	National Key Research and Development Program of China ; State Key Laboratory of Loess and Quaternary Geology ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/15590]
专题	地球环境研究所_黄土与第四纪地质国家重点实验室（2010~）
通讯作者	Ning, Liang
作者单位	1.Univ Massachusetts, Climate Syst Res Ctr, Dept Geosci, Amherst, MA USA 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quatemary Geol, Xian, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Open Studio Simulat Ocean Climate Isotope, Qingdao, Peoples R China 4.Nanjing Normal Univ, Minist Educ, Key Lab Virtual Geog Environm, Sch Geog, Nanjing, Peoples R China 5.Nanjing Normal Univ, Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Sch Geog, Nanjing, Peoples R China 6.Nanjing Normal Univ, Sch Geog, State Key Lab Cultivat Base Geog Environm Evolut, Nanjing, Peoples R China
推荐引用方式 GB/T 7714	Xue, Jiao,Ning, Liang,Qin, Yanmin,et al. Comparisons on characteristics and mechanisms of the decadal megadroughts over eastern China between MCA and LIA[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2020:13.
APA	Xue, Jiao,Ning, Liang,Qin, Yanmin,Chen, Kefan,Yan, Mi,&Liu, Jian.(2020).Comparisons on characteristics and mechanisms of the decadal megadroughts over eastern China between MCA and LIA.INTERNATIONAL JOURNAL OF CLIMATOLOGY,13.
MLA	Xue, Jiao,et al."Comparisons on characteristics and mechanisms of the decadal megadroughts over eastern China between MCA and LIA".INTERNATIONAL JOURNAL OF CLIMATOLOGY (2020):13.