气候变化领域集成服务门户(CCPortal): Simulating surface warming in Earth's three polar regions during the Middle Miocene Climatic Optimum using isotopic and non-isotopic versions of the Community Earth System Model

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DOI	10.1016/j.palaeo.2024.112156
	Simulating surface warming in Earth's three polar regions during the Middle Miocene Climatic Optimum using isotopic and non-isotopic versions of the Community Earth System Model
	Sun, Yong; Ding, Lin; Su, Baohuang; Stepanek, Christian; Ramstein, Gilles
发表日期	2024
ISSN	0031-0182
EISSN	1872-616X
起始页码	643
卷号	643
英文摘要	The Earth's North and South Poles and the Tibetan Plateau - collectively referred to as the 'three poles' - are regions that are very sensitive to climate changes and are known to amplify shifts in global temperature. In the case of the polar regions this effect is well known as polar amplification. The climate patterns during the Middle Miocene Climatic Optimum (MMCO) are considered a past analog to future climate, which could develop patterns and characteristics bearing similarity to MMCO by the end of the century. Therefore, analyzing MMCO environmental conditions in these regions in comparison to a pre-Industrial reference state provides valuable insights into possible future surface temperature changes at the Earth's three poles. We conducted simulations of the MMCO, focusing on surface temperature anomalies at the Earth's three poles. As a modelling tool we employed two versions of the Community Earth System Model (CESM), one of them equipped with model dynamics to simulate stable water isotopes. During the MMCO, we show 1) temperature anomalies at the three poles exceeded global averages, with Antarctica warming most, followed by the Tibetan Plateau and the Arctic, highlighting the role of the Tibetan Plateau as a key factor in global climate change often overlooked; 2) temperature anomalies at the Tibetan Plateau are higher in boreal winter (DJF), while in the Arctic and Antarctic temperature anomalies are larger in boreal summer (JJA), highlighting a seasonal shift between the maximum of climate change signals at the third pole; 3) Changes in clear-sky surface downwelling longwave radiation fluxes (Delta Trlds clearsky) and changes in surface albedo forcing (Delta TSAF) constitute the primary and secondary mechanisms driving the annual surface temperature anomaly at the Earth's three poles. In contrast, the leading physical processes governing the seasonal cycle are subject to regional variation.
英文关键词	Middle Miocene Climatic Optimum; Polar amplification; Tibetan Plateau; CESM1.2/iCESM1.2; Decomposition of physical processes; delta 18 O in precipitation
语种	英语
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:001233874800001
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/291022
作者单位	Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; Universite Paris Cite; CEA; Centre National de la Recherche Scientifique (CNRS); Universite Paris Saclay; China Meteorological Administration; Chinese Academy of Meteorological Sciences (CAMS); Helmholtz Association; Alfred Wegener Institute, Helmholtz Centre for Polar & Marine Research
推荐引用方式 GB/T 7714	Sun, Yong,Ding, Lin,Su, Baohuang,et al. Simulating surface warming in Earth's three polar regions during the Middle Miocene Climatic Optimum using isotopic and non-isotopic versions of the Community Earth System Model[J]. 中国科学院青藏高原研究所,2024,643.
APA	Sun, Yong,Ding, Lin,Su, Baohuang,Stepanek, Christian,&Ramstein, Gilles.(2024).Simulating surface warming in Earth's three polar regions during the Middle Miocene Climatic Optimum using isotopic and non-isotopic versions of the Community Earth System Model.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,643.
MLA	Sun, Yong,et al."Simulating surface warming in Earth's three polar regions during the Middle Miocene Climatic Optimum using isotopic and non-isotopic versions of the Community Earth System Model".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 643(2024).