dc.contributor.author |
Hansen, C.D. |
|
dc.contributor.author |
Meiklejohn, K.I. |
|
dc.contributor.author |
Nel, W. |
|
dc.coverage.spatial |
Western Dronning Maud Land |
|
dc.coverage.spatial |
Antarctica |
|
dc.coverage.spatial |
sub-Antarctic |
|
dc.coverage.spatial |
Marion Island |
|
dc.coverage.spatial |
High Drakensberg |
|
dc.coverage.spatial |
South Africa |
|
dc.date.accessioned |
2021-03-05T15:52:39Z |
|
dc.date.available |
2021-03-05T15:52:39Z |
|
dc.date.created |
18-Aug |
|
dc.date.issued |
18-Aug |
|
dc.identifier.uri |
http://hdl.handle.net/123456789/28351 |
|
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. - Abstract as displayed in the - Abstract booklet. The presentation on the day may differ from the - Abstract. |
en_ZA |
dc.description.sponsorship |
Sponsored by the the Department of Science and Innovation(DSI) through National Research Foundation (NRF) - 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 |
South African National Antarctic Programme (SANAP. |
en_ZA |
dc.relation |
SANAP Symposium 2018 |
en_ZA |
dc.rights |
Copyright |
en_ZA |
dc.rights |
Copyright |
en_ZA |
dc.subject |
Research |
en_ZA |
dc.subject |
Science |
en_ZA |
dc.subject |
Meetings |
en_ZA |
dc.subject |
Symposium |
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 |
Abstracts |
en_ZA |
dc.rights.holder |
Antarctic Legacy of South Africa |
en_ZA |
dc.rights.holder |
Hansen, C.D. |
en_ZA |
dc.rights.holder |
Meiklejohn, K.I. |
en_ZA |
dc.rights.holder |
Nel, W. |
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.mddistributor.distributorcontact |
South African National Antarctic Programme -SANAP. |
en_ZA |
iso19115.mdformat.name |
PDF |
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 |
iso19115.mdidentification.organizationname |
Rhodes University |
en_ZA |
iso19115.mdidentification.organizationname |
University of Pretoria |
en_ZA |
iso19115.mdidentification.organizationname |
University of Fort Hare |
en_ZA |