气候变化领域集成服务门户(CCPortal): A multidecadal-scale tropically driven global teleconnection over the past millennium and its recent strengthening

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DOI	10.1175/JCLI-D-20-0216.1
	A multidecadal-scale tropically driven global teleconnection over the past millennium and its recent strengthening
	Feng X.; Ding Q.; Wu L.; Jones C.; Baxter I.; Tardif R.; Stevenson S.; Emile-Geay J.; Mitchell J.; Carvalho L.M.V.; Wang H.; Steig E.J.
发表日期	2021
ISSN	08948755
起始页码	2549
结束页码	2565
卷号	34 期号:7
英文摘要	In the past 40 years, the global annual mean surface temperature has experienced a nonuniform warming, differing from the spatially uniform warming simulated by the forced responses of large multimodel ensembles to anthropogenic forcing. Rather, it exhibits significant asymmetry between the Arctic and Antarctic, with intermittent and spatially varying warming trends along the Northern Hemisphere (NH) midlatitudes and a slight cooling in the tropical eastern Pacific. In particular, this "wavy"pattern of temperature changes over the NH midlatitudes features strong cooling over Eurasia in boreal winter. Here, we show that these nonuniform features of surface temperature changes are likely tied together by tropical eastern Pacific sea surface temperatures (SSTs), via a global atmospheric teleconnection. Using six reanalyses, we find that this teleconnection can be consistently obtained as a leading circulation mode in the past century. This tropically driven teleconnection is associated with a Pacific SST pattern resembling the interdecadal Pacific oscillation (IPO), and hereafter referred to as the IPO-related bipolar teleconnection (IPO-BT). Further, two paleo-reanalysis reconstruction datasets show that the IPO-BT is a robust recurrent mode over the past 400 and 2000 years. The IPO-BT mode may thus serve as an important internal mode that regulates high-latitude climate variability on multidecadal time scales, favoring a warming (cooling) episode in the Arctic accompanied by cooling (warming) over Eurasia and the Southern Ocean (SO). Thus, the spatial nonuniformity of recent surface temperature trends may be partially explained by the enhanced appearance of the IPO-BT mode by a transition of the IPO toward a cooling phase in the eastern Pacific in the past decades. © 2021 American Meteorological Society.
英文关键词	Antarctica; Arctic; Multidecadal variability; Paleoclimate; Teleconnections; Tropics
语种	英语
scopus关键词	Oceanography; Surface properties; Surface waters; Tropics; Anthropogenic forcing; Inter-decadal pacific oscillations; Multi-decadal time scale; Multi-model ensemble; Sea surface temperatures; Spatial nonuniformity; Surface temperature changes; Surface temperatures; Atmospheric temperature; air-sea interaction; decadal variation; Northern Hemisphere; paleoclimate; sea surface temperature; teleconnection; warming; Antarctica; Arctic; Pacific Ocean; Pacific Ocean (East); Southern Ocean
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178586
作者单位	Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science and Technology, Nanjing, China; Department of Geography, Earth Research Institute, University of California, Santa Barbara, Santa Barbara, CA, United States; Department of Atmospheric and Oceanic Sciences, Institute of Atmospheric Sciences, Fudan University, Shanghai, China; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Bren School of Environmental Science and Management, University of California, Santa Barbara, Santa Barbara, CA, United States; Department of Earth Sciences, University of Southern California, Los Angeles, CA, United States; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, CA, United States; Department of Earth, Planetary and Space Sciences, University of California, Los Angeles, Los Angeles, CA, United States; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Dis...
推荐引用方式 GB/T 7714	Feng X.,Ding Q.,Wu L.,et al. A multidecadal-scale tropically driven global teleconnection over the past millennium and its recent strengthening[J],2021,34(7).
APA	Feng X..,Ding Q..,Wu L..,Jones C..,Baxter I..,...&Steig E.J..(2021).A multidecadal-scale tropically driven global teleconnection over the past millennium and its recent strengthening.Journal of Climate,34(7).
MLA	Feng X.,et al."A multidecadal-scale tropically driven global teleconnection over the past millennium and its recent strengthening".Journal of Climate 34.7(2021).