干旱区生态环境知识资源中心(Arid): Ice-covered ponds in the Untersee Oasis (East Antarctica): Distribution, chemical composition, and trajectory under a warming climate

Arid

DOI	10.1080/15230430.2021.2000566
	Ice-covered ponds in the Untersee Oasis (East Antarctica): Distribution, chemical composition, and trajectory under a warming climate
	Faucher, Benoit; Lacelle, Denis; Marsh, Nicole B.; Fisher, David A.; Andersen, Dale T.
通讯作者	Faucher, B (corresponding author), Univ Ottawa, Dept Geog Environm & Geomat, Ottawa, ON K1N 6N5, Canada.
来源期刊	ARCTIC ANTARCTIC AND ALPINE RESEARCH
ISSN	1523-0430
EISSN	1938-4246
出版年	2021
卷号	53 期号:1 页码:324-339
英文摘要	Climate change is impacting lakes and ponds in Antarctica. To that end, we investigated the distribution and chemical composition of ice-covered ponds in Untersee Oasis, East Antarctica. Thirty-nine ponds were inventoried, and the thirteen sampled ponds have low total dissolved solutes (TDS) with a Ca(Na)-SO4 or Na-Cl geochemical facies. Tritium and radiocarbon measurements of the total inorganic carbon (TIC) suggest that the ponds are recharged by modern snowmelt. Hierarchical cluster analysis grouped the ponds based on the amount of potential incoming solar radiation reaching their surface. Ponds receiving higher insolation develop moats or completely lose their ice cover during summer, have lower pH, and higher TDS, delta O-18, total inorganic carbon, and delta C-13(TIC),which suggest CO2 availability is not limiting benthic photosynthetic activity. The ponds that receive lower insolation retain their full ice cover and remain well-sealed to direct exchanges with the atmosphere, have high pH, and lower TDS and TIC, and likely host a CO2-starved benthic microbial ecosystem. Therefore, the state of the ponds' ice cover evolved their hydrochemistry along different trajectories. The findings can be used to predict the trajectory of the chemical composition of the ponds and effect on biological productivity as the phenology of their ice cover shifts under a warming climate.
英文关键词	Ice-covered ponds isotope geochemistry modeling freezing evaporation Dronning Maud Land
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000728727400001
WOS关键词	MCMURDO DRY VALLEYS ; DISSOLVED INORGANIC CARBON ; STABLE-ISOTOPE RATIOS ; DRONNING MAUD LAND ; LAKE UNTERSEE ; ORGANIC-MATTER ; SALINE LAKES ; FRACTIONATION ; TEMPERATURE ; ACCUMULATION
WOS类目	Environmental Sciences ; Geography, Physical
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/373596
作者单位	[Faucher, Benoit; Lacelle, Denis] Univ Ottawa, Dept Geog Environm & Geomat, Ottawa, ON K1N 6N5, Canada; [Marsh, Nicole B.; Fisher, David A.] Univ Ottawa, Dept Earth & Environm Sci, Ottawa, ON, Canada; [Andersen, Dale T.] SETI Inst, Carl Sagan Ctr, Mountain View, CA USA
推荐引用方式 GB/T 7714	Faucher, Benoit,Lacelle, Denis,Marsh, Nicole B.,et al. Ice-covered ponds in the Untersee Oasis (East Antarctica): Distribution, chemical composition, and trajectory under a warming climate[J],2021,53(1):324-339.
APA	Faucher, Benoit,Lacelle, Denis,Marsh, Nicole B.,Fisher, David A.,&Andersen, Dale T..(2021).Ice-covered ponds in the Untersee Oasis (East Antarctica): Distribution, chemical composition, and trajectory under a warming climate.ARCTIC ANTARCTIC AND ALPINE RESEARCH,53(1),324-339.
MLA	Faucher, Benoit,et al."Ice-covered ponds in the Untersee Oasis (East Antarctica): Distribution, chemical composition, and trajectory under a warming climate".ARCTIC ANTARCTIC AND ALPINE RESEARCH 53.1(2021):324-339.