globalchange  > 影响、适应和脆弱性
DOI: 10.5194/cp-14-101-2018
Scopus记录号: 2-s2.0-85041229290
论文题名:
Climate variability in the subarctic area for the last 2 millennia
作者: Nicolle M.; Debret M.; Massei N.; Colin C.; Devernal A.; Divine D.; Werner J.P.; Hormes A.; Korhola A.; Linderholm H.W.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2018
卷: 14, 期:1
起始页码: 101
结束页码: 116
语种: 英语
Scopus关键词: Atlantic Multidecadal Oscillation ; climate variation ; cooling ; database ; decadal variation ; greenhouse gas ; Little Ice Age ; Medieval Warm Period ; paleoclimate ; proxy climate record ; sea ice ; subarctic region ; trend analysis ; warming ; Alaska ; Arctic ; Atlantic Ocean ; Atlantic Ocean (North) ; Siberia ; United States
英文摘要: To put recent climate change in perspective, it is necessary to extend the instrumental climate records with proxy data from paleoclimate archives. Arctic climate variability for the last 2 millennia has been investigated using statistical and signal analyses from three regionally averaged records from the North Atlantic, Siberia and Alaska based on many types of proxy data archived in the Arctic 2k database v1.1.1. In the North Atlantic and Alaska, the major climatic trend is characterized by long-term cooling interrupted by recent warming that started at the beginning of the 19th century. This cooling is visible in the Siberian region at two sites, warming at the others. The cooling of the Little Ice Age (LIA) was identified from the individual series, but it is characterized by wide-range spatial and temporal expression of climate variability, in contrary to the Medieval Climate Anomaly. The LIA started at the earliest by around ADĝ€1200 and ended at the latest in the middle of the 20th century. The widespread temporal coverage of the LIA did not show regional consistency or particular spatial distribution and did not show a relationship with archive or proxy type either. A focus on the last 2 centuries shows a recent warming characterized by a well-marked warming trend parallel with increasing greenhouse gas emissions. It also shows a multidecadal variability likely due to natural processes acting on the internal climate system on a regional scale. A ĝ1/4 16–30-year cycle is found in Alaska and seems to be linked to the Pacific Decadal Oscillation, whereas ĝ1/4 20–30- and ĝ1/4 50–90-year periodicities characterize the North Atlantic climate variability, likely in relation with the Atlantic Multidecadal Oscillation. These regional features are probably linked to the sea ice cover fluctuations through ice–temperature positive feedback. © Author(s) 2018.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109597
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Normandie Univ, UNIROUEN, UNICAEN, CNRS, M2C, Rouen, 76000, France; GEOPS, CNRS, University of Paris-Sud, Orsay Cedex, 91405, France; Centre de Recherche en Géochimie et Géodynamique (Geotop), Université du Québec À Montréal, Montréal, QC, Canada; Norwegian Polar Institute, Tromsø, Norway; Department of Mathematics and Statistics, Arctic University of Norway, Tromsø, Norway; Bjerknes Center for Climate Research, Department of Earth Science, University of Bergen, Bergen, Norway; University of Gothenburg, Department of Earth Sciences, Gothenburg, Sweden; Department of Environmental Sciences, Environmental Change Research Unit (ECRU), University of Helsinki, P.O. Box 65, Helsinki, 00014, Finland; Regional Climate Group, Department of Earth Sciences, University of Gothenburg, Gothenburg, 40530, Sweden

Recommended Citation:
Nicolle M.,Debret M.,Massei N.,et al. Climate variability in the subarctic area for the last 2 millennia[J]. Climate of the Past,2018-01-01,14(1)
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