气候变化领域集成服务门户(CCPortal): Challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from Adélie Land, coastal Antarctica

CCPortal

DOI	10.5194/tc-13-1297-2019
	Challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from Adélie Land, coastal Antarctica
	Goursaud S.; Valerie M.-D.; Favier V.; Preunkert S.; Legrand M.; Minster B.; Werner M.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	1297
结束页码	1324
卷号	13 期号:4
英文摘要	A new 21.3m firn core was drilled in 2015 at a coastal Antarctic high-accumulation site in Adelie Land (66.78 S; 139.56 E, 602ma.s.l.), named Terre Adelie 192A (TA192A). The mean isotopic values (19:33:1for 18O and 5:42:2for deuterium excess) are consistent with other coastal Antarctic values. No significant isotope-temperature relationship can be evidenced at any timescale. This rules out a simple interpretation in terms of local temperature. An observed asymmetry in the 18O seasonal cycle may be explained by the precipitation of air masses coming from the eastern and western sectors in autumn and winter, recorded in the d-excess signal showing outstanding values in austral spring versus autumn. Significant positive trends are observed in the annual d-excess record and local sea ice extent (135-145 E) over the period 1998-2014.However, process studies focusing on resulting isotopic compositions and particularly the deuterium excess-18O relationship, evidenced as a potential fingerprint of moisture origins, as well as the collection of more isotopic measurements in Adelie Land are needed for an accurate interpretation of our signals. © Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License.
学科领域	climate change; geoaccumulation; ice core; isotopic composition; oxygen isotope; sea ice; seasonal variation; stable isotope; temperature profile; Adelie Coast; Antarctica; East Antarctica
语种	英语
scopus关键词	climate change; geoaccumulation; ice core; isotopic composition; oxygen isotope; sea ice; seasonal variation; stable isotope; temperature profile; Adelie Coast; Antarctica; East Antarctica
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118890
作者单位	LSCE (UMR CEA-CNRS-UVSQ 8212-IPSL), Gif-sur-Yvette, France; Univ. Grenoble Alpes, CNRS, IGE, Grenoble, 38000, France; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
推荐引用方式 GB/T 7714	Goursaud S.,Valerie M.-D.,Favier V.,et al. Challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from Adélie Land, coastal Antarctica[J],2019,13(4).
APA	Goursaud S..,Valerie M.-D..,Favier V..,Preunkert S..,Legrand M..,...&Werner M..(2019).Challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from Adélie Land, coastal Antarctica.The Cryosphere,13(4).
MLA	Goursaud S.,et al."Challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from Adélie Land, coastal Antarctica".The Cryosphere 13.4(2019).