J 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
Name: ECOPOLARIS - Změny ve struktuře a funkci součástí terestrických polárních ekosystémů (CzechPolar2)
LM2015078, research and development project
Name: Česká polární výzkumná infrastruktura (Acronym: CzechPolar2)
Investor: Ministry of Education, Youth and Sports of the CR
MUNI/A/1251/2017, interní kód MU
Name: Integrovaný výzkum environmentálních změn v krajinné sféře Země III
Investor: Masaryk University, Category A