DOI: 10.1016/j.earscirev.2019.102984
论文题名: Moisture changes in Northeast China since the last deglaciation: Spatiotemporal out-of-phase patterns and possible forcing mechanisms
作者: Zhang M. ; Bu Z. ; Wang S. ; Jiang M.
刊名: Earth-Science Reviews
ISSN: 128252
出版年: 2020
卷: 201 语种: 英语
英文关键词: Forcing mechanisms
; Hydroclimate
; Moisture changes
; Northeast China
; Since the last deglaciation
; Temporal variation and spatial distribution
Scopus关键词: climate effect
; climate variation
; global warming
; last deglaciation
; paleoclimate
; peatland
; spatial distribution
; temporal variation
; China
英文摘要: There is a strong chance that the 21 st century warming will cause differences in precipitation distribution over the globe. Northeast (NE) China is a unique area whose atmospheric circulation is still a controversial subject and is likely to be strongly impacted by global warming. Thus, a good understanding of the past variations in effective moisture in NE China will be benefit for the prediction of future hydrological changes. In this study, we use basal peat ages and published paleoclimate records to evaluate the spatial and temporal patterns and possible forcing mechanisms for the moisture changes in NE China over the past 16,000 years. Basal peat ages suggest that the moisture conditions in different regions of NE China show as a spatiotemporal out-phase pattern. In addition, the paleoclimate records of 17 sites also indicate that NE China experienced a spatiotemporal out-phase pattern of moisture changes along northwest-southeast direction since the last deglaciation. The moisture in southern NE China experienced increasing trend during the period of 16-8 cal ka BP, with the maximum moisture occurring 8-3 cal ka BP and decreasing trend after 3 cal ka BP. The moisture pattern in western NE China is similar to that in southern NE China. It experienced increasing trend during the period of 16-8 cal ka BP, the maximum moisture during the period 8-4 cal ka BP and decreasing trend from 4 cal ka BP to present. The moisture in eastern NE China experienced wet conditions from 16 cal ka BP to 4 cal ka BP, and decreasing trend after 4 cal ka BP. In central NE China, two relatively wet periods occurred during the periods of 13-8 cal ka BP and 6-3 cal ka BP, respectively. In addition, two wet periods occurred during the periods of 14-11 cal ka BP and 7-1 cal ka BP in northern NE China, respectively. The moisture patterns between NE China and other regions of China are also compared in this study. We propose that the possible forcing mechanisms for the moisture changes in NE China were different for each 4000 year interval. During the period of 16-12 cal ka BP, the weak East Asian summer monsoon (EASM) and strong Northeast monsoon (NEM) were the major water vapor sources of NE China. During the period of 12-8 cal ka BP, the increasing EASM and strong NEM were still the major water vapor sources of NE China. During the period of 8-4 cal ka BP, the strongest EASM was the major water vapor sources of the whole NE China. Furthermore, the increasing Westerlies slightly penetrated into northern NE China during this period. From 4 cal ka BP to present, the decreasing EASM provided precipitation for the most regions of NE China. The Westerlies reached the maximum and further penetrated into the whole northern NE China during this period. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159487
Appears in Collections: 气候变化与战略
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作者单位: Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun, 130024, China; Shandong Key Laboratory of Depositional Mineralization & Sedimentary Mineral, Shandong University of Science and Technology, Qingdao, Shandong 266590, China; State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Institute for Peat and Mire Research, Northeast Normal University, Changchun, 130024, China; Jilin Provincial Key Laboratory for Wetland Ecological Processes and Environmental Change in the Changbai Mountains, Changchun, 130024, China; Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China
Recommended Citation:
Zhang M.,Bu Z.,Wang S.,et al. Moisture changes in Northeast China since the last deglaciation: Spatiotemporal out-of-phase patterns and possible forcing mechanisms[J]. Earth-Science Reviews,2020-01-01,201