气候变化领域集成服务门户(CCPortal): Arctic air mass triggered the extreme temperature events recorded in the Laohugou ice core from the northeastern Tibetan Plateau

CCPortal

DOI	10.1016/j.atmosres.2021.105909
	Arctic air mass triggered the extreme temperature events recorded in the Laohugou ice core from the northeastern Tibetan Plateau
	Du W.; Kang S.; Chen J.; Sun W.; Qin X.; Sun W.; Zhang Y.
发表日期	2022
ISSN	0169-8095
卷号	265
英文摘要	The frequency and the intensity of extreme temperature events have both increased globally because of the effects of climate warming. Such extreme events should be distinct in high-elevation areas owing to the phenomenon of elevation-dependent warming; however, corroborating evidence remains limited because of scarce observations. This study used the percentile method to identify annual extreme temperature events recorded in the δ18O of the Laohugou ice core (1960–2006) retrieved from the high-elevation area of the northeastern Tibetan Plateau (NETP). Comparison of these events with synchronous observations obtained at surrounding meteorological stations indicated that extreme temperature events identified from the ice core corresponded well with most temperature observations from the meteorological stations, suggesting that the δ18O record could be considered a reasonable proxy for regional temperature. However, occasional discord between the ice core and station records might reflect specific climatic shifts. Using circulation synthesis, the influencing circulation mechanism of each event was determined on the basis of differences in atmospheric parameters between each event and the average climatic state during 1970–2000. A double blocking high with warming over the Ural Mountains and east of Kuril–Kamchatka resulted in Eurasian warming, which transported warm air to the NETP and triggered the extreme high-temperature events. Conversely, a polar vortex in the Arctic led to a cold low over Eurasia, which transported cold air to the NETP causing extreme low-temperature events. The finding that variation of the Arctic air mass triggers extreme temperature events at high elevations in the NETP provides crucial insight for improved comprehension and forecasting of regional extreme temperature events. © 2021 Elsevier B.V.
英文关键词	Arctic air mass; Extreme temperature; High elevation; Northeastern Tibetan Plateau; δ18O record
来源期刊	Atmospheric Research
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236522
作者单位	Qilian Shan Station of Glaciology and Eco-environment, State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences (CAS), Lanzhou, 730000, China; CAS Center for Excellence in Earth Sciences, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100049, China; College of Geography and Environment, Shandong Normal University, Jinan, 250014, China
推荐引用方式 GB/T 7714	Du W.,Kang S.,Chen J.,et al. Arctic air mass triggered the extreme temperature events recorded in the Laohugou ice core from the northeastern Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2022,265.
APA	Du W..,Kang S..,Chen J..,Sun W..,Qin X..,...&Zhang Y..(2022).Arctic air mass triggered the extreme temperature events recorded in the Laohugou ice core from the northeastern Tibetan Plateau.Atmospheric Research,265.
MLA	Du W.,et al."Arctic air mass triggered the extreme temperature events recorded in the Laohugou ice core from the northeastern Tibetan Plateau".Atmospheric Research 265(2022).