2019
Lacustrine systems of Clearwater Mesa (James Ross Island, northeastern Antarctic Peninsula): geomorphological setting and limnological characterization
ROMAN, Matěj; Linda NEDBALOVÁ; Tyler J KOHLER; Juan M LIRIO; Silvia H CORIA et. al.Basic information
Original name
Lacustrine systems of Clearwater Mesa (James Ross Island, northeastern Antarctic Peninsula): geomorphological setting and limnological characterization
Authors
ROMAN, Matěj (203 Czech Republic, belonging to the institution); Linda NEDBALOVÁ (203 Czech Republic); Tyler J KOHLER (840 United States of America); Juan M LIRIO; Silvia H CORIA; Jiří KOPÁČEK (203 Czech Republic); Paula VIGNONI; Kateřina KOPALOVÁ (203 Czech Republic); Karina L LECOMTE; Josef ELSTER and Daniel NÝVLT (203 Czech Republic, belonging to the institution)
Edition
Antarctic Science, NEW YORK, CAMBRIDGE UNIV PRESS, 2019, 0954-1020
Other information
Language
English
Type of outcome
Article in a journal
Field of Study
10508 Physical geography
Country of publisher
United States of America
Confidentiality degree
is not subject to a state or trade secret
References:
Impact factor
Impact factor: 1.417
RIV identification code
RIV/00216224:14310/19:00110339
Organization unit
Faculty of Science
UT WoS
000478614300001
EID Scopus
2-s2.0-85065594637
Keywords (in Czech)
deglaciace; hydrologie; vznik jezer; klasifikace jezer; vývoj povrchu; hydrochemismus
Keywords in English
deglaciation; hydrology; lake origin; lake typology; landscape evolution; water chemistry
Tags
Tags
International impact, Reviewed
Changed: 23/3/2020 17:15, Mgr. Marie Novosadová Šípková, DiS.
Abstract
In the original language
Lentic freshwater habitats are important centres of biodiversity within the infrequent ice-free oases across Antarctica. Given imminent climate changes, it is crucial to catalogue these habitats in order to provide baseline data for future monitoring and biological surveys. The lacustrine systems of Clearwater Mesa, a previously unexplored part of James Ross Island, north-eastern Antarctic Peninsula, are described here. We conducted basic geomorphological and limnological surveys over three Antarctic summers 2009–16 to characterize landscape evolution, infer the origin of lake basins and assess the variability in their water chemistry. Stable shallow lakes, formed in depressions between lava tumuli following the last deglaciation, were found to dominate the volcanic mesa, although several peripheral lakes in ice-proximal settings appear to have formed recently as a result of post-Neoglacial ice recession. We found large heterogeneity in conductivity from 10 to 7000 microS cm-1, despite the lithologically uniform substrate. This variability was shown to be related to lake type, basin type open vs closed, meltwater source and proximity to the coast. Inter-annual differences were attributed to changes in sea spray influx and snow accumulation driven by variable weather conditions. Overall, the ion composition of lakes suggested that sea spray was the dominant source of ions, followed by the weathering of bedrock.
Links
EF16_013/0001708, research and development project |
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LM2015078, research and development project |
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MUNI/A/1251/2017, interní kód MU |
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