干旱区生态环境知识资源中心(Arid): Influence of Late Holocene climate on Lake Eggers hydrology, McMurdo Sound

Arid

DOI	10.1017/S0954102021000018
	Influence of Late Holocene climate on Lake Eggers hydrology, McMurdo Sound
	Chamberlain, E. J.; Christ, A. J.; Fulweiler, R. W.
通讯作者	Chamberlain, EJ (corresponding author), Boston Univ, Dept Earth & Environm, Boston, MA 02215 USA. ; Chamberlain, EJ (corresponding author), Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92037 USA.
来源期刊	ANTARCTIC SCIENCE
ISSN	0954-1020
EISSN	1365-2079
出版年	2021
卷号	33 期号:2 页码:217-229
英文摘要	Ice-covered lakes in Antarctica preserve records of regional hydroclimate and harbour extreme ecosystems that may serve as terrestrial analogues for exobiotic environments. Here, we examine the impacts of hydroclimate and landscape on the formation history of Lake Eggers, a small ice-sealed lake, located in the coastal polar desert of McMurdo Sound, Antarctica (78 degrees S). Using ground penetrating radar surveys and three lake ice cores we characterize the ice morphology and chemistry. Lake ice geochemistry indicates that Lake Eggers is fed primarily from local snowmelt that accreted onto the lake surface during runoff events. Radiocarbon ages of ice-encased algae suggest basal ice formed at least 735 +/- 20 calibrated years before present (1215 C.E.). Persisting through the Late Holocene, Lake Eggers alternated between periods of ice accumulation and sublimation driven by regional climate variability in the western Ross Sea. For example, particulate organic matter displayed varying delta N-15 ratios with depth, corresponding to sea ice fluctuations in the western Ross Sea during the Late Holocene. These results suggest a strong climatic control on the hydrologic regime shifts shaping ice formation at Lake Eggers.
英文关键词	Antarctica hydroclimate Little Ice Age Ross Sea water-balance
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000648921000010
WOS关键词	DRY VALLEYS ; ORGANIC-MATTER ; TAYLOR VALLEY ; POLAR DESERT ; ROSS SEA ; ICE-AGE ; ANTARCTICA ; ECOSYSTEM ; NITROGEN ; ORIGIN
WOS类目	Environmental Sciences ; Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349472
作者单位	[Chamberlain, E. J.; Christ, A. J.; Fulweiler, R. W.] Boston Univ, Dept Earth & Environm, Boston, MA 02215 USA; [Christ, A. J.] Univ Vermont, Dept Geol, Burlington, VT 05405 USA; [Fulweiler, R. W.] Boston Univ, Dept Biol, 5 Cummington St, Boston, MA 02215 USA; [Chamberlain, E. J.] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92037 USA
推荐引用方式 GB/T 7714	Chamberlain, E. J.,Christ, A. J.,Fulweiler, R. W.. Influence of Late Holocene climate on Lake Eggers hydrology, McMurdo Sound[J],2021,33(2):217-229.
APA	Chamberlain, E. J.,Christ, A. J.,&Fulweiler, R. W..(2021).Influence of Late Holocene climate on Lake Eggers hydrology, McMurdo Sound.ANTARCTIC SCIENCE,33(2),217-229.
MLA	Chamberlain, E. J.,et al."Influence of Late Holocene climate on Lake Eggers hydrology, McMurdo Sound".ANTARCTIC SCIENCE 33.2(2021):217-229.