气候变化领域集成服务门户(CCPortal): Recent changes in north-west Greenland climate documented by NEEM shallow ice core data and simulations, and implications for past-temperature reconstructions

CCPortal

DOI	10.5194/tc-9-1481-2015
	Recent changes in north-west Greenland climate documented by NEEM shallow ice core data and simulations, and implications for past-temperature reconstructions
	Masson-Delmotte V.; Steen-Larsen H.C.; Ortega P.; Swingedouw D.; Popp T.; Vinther B.M.; Oerter H.; Sveinbjornsdottir A.E.; Gudlaugsdottir H.; Box J.E.; Falourd S.; Fettweis X.; Gallée H.; Garnier E.; Gkinis V.; Jouzel J.; Landais A.; Minster B.; Paradis N.; Orsi A.; Risi C.; Werner M.; White J.W.C.
发表日期	2015
ISSN	19940416
卷号	9 期号:4
英文摘要	Combined records of snow accumulation rate, δ18O and deuterium excess were produced from several shallow ice cores and snow pits at NEEM (North Greenland Eemian Ice Drilling), covering the period from 1724 to 2007. They are used to investigate recent climate variability and characterise the isotope-temperature relationship. We find that NEEM records are only weakly affected by inter-annual changes in the North Atlantic Oscillation. Decadal δ18O and accumulation variability is related to North Atlantic sea surface temperature and is enhanced at the beginning of the 19th century. No long-term trend is observed in the accumulation record. By contrast, NEEM δ18O shows multidecadal increasing trends in the late 19th century and since the 1980s. The strongest annual positive δ18O values are recorded at NEEM in 1928 and 2010, while maximum accumulation occurs in 1933. The last decade is the most enriched in δ18O (warmest), while the 11-year periods with the strongest depletion (coldest) are depicted at NEEM in 1815-1825 and 1836-1846, which are also the driest 11-year periods. The NEEM accumulation and δ18O records are strongly correlated with outputs from atmospheric models, nudged to atmospheric reanalyses. Best performance is observed for ERA reanalyses. Gridded temperature reconstructions, instrumental data and model outputs at NEEM are used to estimate the multidecadal accumulation-temperature and δ18O-temperature relationships for the strong warming period in 1979-2007. The accumulation sensitivity to temperature is estimated at 11 ± 2 % °Cg-1 and the δ18O-temperature slope at 1.1 ± 0.2 % °C-1, about twice as large as previously used to estimate last interglacial temperature change from the bottom part of the NEEM deep ice core. © 2015. CC Attribution 3.0 License.
学科领域	atmospheric modeling; climate change; climate variation; data set; deuterium; geoaccumulation; ice core; Last Interglacial; North Atlantic Oscillation; oxygen isotope; paleoenvironment; paleotemperature; reconstruction; sea surface temperature; simulation; snow accumulation; temperature gradient; Arctic; Atlantic Ocean; Atlantic Ocean (North); Greenland
语种	英语
scopus关键词	atmospheric modeling; climate change; climate variation; data set; deuterium; geoaccumulation; ice core; Last Interglacial; North Atlantic Oscillation; oxygen isotope; paleoenvironment; paleotemperature; reconstruction; sea surface temperature; simulation; snow accumulation; temperature gradient; Arctic; Atlantic Ocean; Atlantic Ocean (North); Greenland
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119845
作者单位	LSCE (UMR CEA-CNRS-UVSQ 8212/IPSL), Gif-sur-Yvette, France; UMR CNRS 5805 EPOC, OASU, Université Bordeaux 1, Pessac, 33615, France; Centre for Ice and Climate, University of Copenhagen, Copenhagen, Denmark; AWI, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; Institute of Earth Sciences, University of Iceland, Reykjavik, Iceland; GEUS, Copenhagen, Denmark; University of Liège, Liège, Belgium; LGGE (UMR 5183 CNRS-UJF), Domaine Universitaire, 54 rue Molière, St Martin d'Hères cédex, 38 402, France; UMR CNRS LIENSs, Université de la Rochelle, La Rochelle, France; LMD, Paris, France; INSTAAR, Boulder, CO, United States; LOCEAN, Paris, France
推荐引用方式 GB/T 7714	Masson-Delmotte V.,Steen-Larsen H.C.,Ortega P.,et al. Recent changes in north-west Greenland climate documented by NEEM shallow ice core data and simulations, and implications for past-temperature reconstructions[J],2015,9(4).
APA	Masson-Delmotte V..,Steen-Larsen H.C..,Ortega P..,Swingedouw D..,Popp T..,...&White J.W.C..(2015).Recent changes in north-west Greenland climate documented by NEEM shallow ice core data and simulations, and implications for past-temperature reconstructions.Cryosphere,9(4).
MLA	Masson-Delmotte V.,et al."Recent changes in north-west Greenland climate documented by NEEM shallow ice core data and simulations, and implications for past-temperature reconstructions".Cryosphere 9.4(2015).