Physics and geochemistry of lakes in Vestfjella, Dronning Maud Land

Show full item record



Leppäranta , M , Luttinen , A & Arvola , L 2020 , ' Physics and geochemistry of lakes in Vestfjella, Dronning Maud Land ' , Antarctic Science , vol. 32 , no. 1 , 0954102019000555 , pp. 29-42 .

Title: Physics and geochemistry of lakes in Vestfjella, Dronning Maud Land
Author: Leppäranta, Matti; Luttinen, Arto; Arvola, Lauri
Contributor organization: Institute for Atmospheric and Earth System Research (INAR)
Natural Sciences Unit
Finnish Museum of Natural History
Biological stations
Lammi Biological Station
Date: 2020-02
Language: eng
Number of pages: 14
Belongs to series: Antarctic Science
ISSN: 0954-1020
Abstract: Shallow Antarctic surface lakes belong to the most extreme aquatic environments on the Earth. In Vestfjella, proglacial surface lakes and ponds are characterized by a 2-5 month long period with liquid water and depths <2 m. We give a detailed description of nine seasonal lakes and ponds situating at three nunataqs (Basen, Plogen and Fossilryggen) in western Dronning Maud Land. Their physical and geochemical properties are provided based on observations in four summers. Three main 'lake categories' were found: 1) supraglacial lakes, 2) epiglacial ponds and 3) nunataq ponds. Category 3 lakes can be divided into two subgroups with regards to whether the meltwater source is glacial or just seasonal snow patches. Supraglacial lakes are ultra-oligotrophic (electrical conductivity <10 mu S cm(-1), pH <7), while in epiglacial ponds the concentrations of dissolved and suspended matter and trophic status vary over a wide range (electrical conductivity 20-110 mu S cm(-1), pH 6-9). In nunataq ponds, the maxima were an electrical conductivity of 1042 mu S cm(-1)and a pH of 10.1, and water temperature may have wide diurnal and day-to-day fluctuations (maximum 9.3 degrees C) because snowfall, snow drift and sublimation influence the net solar irradiance.
Subject: 1171 Geosciences
Peer reviewed: Yes
Rights: cc_by_nc_nd
Usage restriction: openAccess
Self-archived version: acceptedVersion

Files in this item

Total number of downloads: Loading...

Files Size Format View
AntSci_2019_SP_1304.R1_AAM.pdf 2.587Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record