Antarctic Legacy Archive

Comparing the frost environment of three disparate locations: Western Dronning Maud Land of Antarctica, sub-Antarctic Marion Island and the High Drakensberg of South Africa

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dc.contributor.advisor
dc.contributor.author Hansen, C.D.
dc.contributor.author Meiklejohn, K.I.
dc.contributor.author Nel, W.
dc.coverage.spatial Western Dronning Maud Land|Antarctica|sub-Antarctic|Marion Island|High Drakensberg|South Africa
dc.date.accessioned 2020-06-22T15:50:07Z
dc.date.available 2020-06-22T15:50:07Z
dc.date.created Aug-18
dc.identifier.uri http://hdl.handle.net/123456789/21371
dc.description.abstract Frost processes occur across climatic zones and warming temperatures affect regions where climatic thresholds are narrow. This paper explores the annual, seasonal and diurnal frost environments of three locations: western Dronning Maud Land (WDML) of Antarctica, sub-Antarctic Marion Island, and the High Drakensberg of the Eastern Cape of South Africa. WDML is characterised by continuous permafrost and a paucity of diurnal thawing and a shallow active layer. Permafrost is absent on both sub-Antarctic Marion Island and in continental South Africa. Marion Island is, however, characterised by a dynamic diurnal frost environment, with shallow and high-frequency cycles. The High Drakensberg of the Eastern Cape of South Africa exhibit seasonal freezing at higher altitudes with frozen ground occurring for periods of up two months at ~ 3000 m.a.s.l. Global warming scenarios (1°C, 2°C and 5°C increases) and how these affect freezing cycles are explored, as are environmental and locational forcings on freezing cycles observed. The results from WDML contribute towards scientific output and research of ANTPAS (Antarctic Permafrost and Soils) and the Global Terrestrial Network for Permafrost (GTN-P). Higher altitudes show an increase in frost cycles; vegetation cover dampens such cycles. Furthermore, snow cover reduces diurnal frost in WDML, whereas it increases the depth of freezing on Marion Island. Finally, diurnal frost cycles are highly sensitive to temperature changes and associated thresholds and that such cycles can be used as indicators for warming conditions. en_ZA
dc.description.sponsorship Sponsored by the National Research Foundation (South Africa) en_ZA
dc.description.statementofresponsibility Antarctic Legacy of South Africa en_ZA
dc.format PDF en_ZA
dc.language English en_ZA
dc.language.iso en_ZA en_ZA
dc.publisher SANAP Symposium 2018 en_ZA
dc.relation.ispartof Combination of Earth Systems and or Living Systems (Speed Talk Presentations) en_ZA
dc.rights copyright. en_ZA
dc.subject SANAP Symposium 2018 en_ZA
dc.subject Earth Systems en_ZA
dc.subject Geomorphology en_ZA
dc.subject Western Dronning Maud Land en_ZA
dc.subject Antarctica en_ZA
dc.subject sub-Antarctic en_ZA
dc.subject Marion Island en_ZA
dc.subject High Drakensberg en_ZA
dc.subject South Africa en_ZA
dc.subject Frost en_ZA
dc.subject Warming Temperatures en_ZA
dc.subject Climatic Zones en_ZA
dc.subject Frost Environments en_ZA
dc.subject Permafrost en_ZA
dc.subject Active Layer en_ZA
dc.subject Global Warming en_ZA
dc.subject Freezing Cycles en_ZA
dc.subject Soils en_ZA
dc.subject Antarctic Permafrost en_ZA
dc.title Comparing the frost environment of three disparate locations: Western Dronning Maud Land of Antarctica, sub-Antarctic Marion Island and the High Drakensberg of South Africa en_ZA
dc.type Presentations en_ZA
dc.type Abstracts en_ZA
dc.rights.holder Hansen, C.D. en_ZA
iso19115.mdconstraints.uselimitation This item and the content of this website are subject to copyright protection. Reproduction of the content, or any part of it, other than for research, academic or non-commercial use is prohibited without prior consent from the copyright holder. en_ZA
iso19115.mdidentification.deliverypoint Antarctic Legacy of South Africa, Faculty of Science, Private Bag X1, Matieland. Stellenbosch. South Africa. en_ZA
iso19115.mdidentification.electronicmailaddress antarcticlegacy@sun.ac.za en_ZA


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