Recent glacier decline in the Kerguelen Islands (49°S, 69°E) derived from modeling, field observations, and satellite data
Date of Acceptance: 28/02/2015 The retreat of glaciers in the Kerguelen Islands (49°S, 69°E) and their associated climatic causes have been analyzed using field data and Moderate Resolution Imaging Spectroradiometer (MODIS) satellite images to validate a positive degree-day (PDD) model forced by dat...
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Online Access: | http://hdl.handle.net/10023/7567 https://doi.org/10.1002/2014JF003329 |
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/7567 2023-07-02T03:32:34+02:00 Recent glacier decline in the Kerguelen Islands (49°S, 69°E) derived from modeling, field observations, and satellite data Verfaillie, D. Favier, V. Dumont, M. Jomelli, V. Gilbert, A. Brunstein, D. Gallée, H. Rinterknecht, V. Menegoz, M. Frenot, Y. University of St Andrews. Earth and Environmental Sciences University of St Andrews. Marine Alliance for Science & Technology Scotland University of St Andrews. Scottish Oceans Institute 2015-09-30 18 application/pdf http://hdl.handle.net/10023/7567 https://doi.org/10.1002/2014JF003329 eng eng Journal of Geophysical Research - Earth Surface Verfaillie , D , Favier , V , Dumont , M , Jomelli , V , Gilbert , A , Brunstein , D , Gallée , H , Rinterknecht , V , Menegoz , M & Frenot , Y 2015 , ' Recent glacier decline in the Kerguelen Islands (49°S, 69°E) derived from modeling, field observations, and satellite data ' , Journal of Geophysical Research - Earth Surface , vol. 120 , no. 3 , pp. 637-654 . https://doi.org/10.1002/2014JF003329 2169-9003 PURE: 190332603 PURE UUID: 25e24473-ad47-4e56-9496-b5a52c3116c8 Scopus: 84927584674 WOS: 000353694200014 http://hdl.handle.net/10023/7567 https://doi.org/10.1002/2014JF003329 © 2015. American Geophysical Union. All Rights Reserved. Reproduced in accordance with the publisher's author reuse policy. GB Physical geography QE Geology NDAS GB QE Journal article 2015 ftstandrewserep https://doi.org/10.1002/2014JF003329 2023-06-13T18:25:16Z Date of Acceptance: 28/02/2015 The retreat of glaciers in the Kerguelen Islands (49°S, 69°E) and their associated climatic causes have been analyzed using field data and Moderate Resolution Imaging Spectroradiometer (MODIS) satellite images to validate a positive degree-day (PDD) model forced by data from local meteorological stations. Mass balance measurements made during recent field campaigns on the largest glacier of the Cook Ice Cap were compared to data from the early 1970s, providing a 40 year view of the differences in the spatial distribution of surface mass balance (SMB). To obtain additional regional data for the validation of our models, we analyzed MODIS images (2000-2012) to determine if our model was capable of reproducing variations in the transient snow line. The PDD model correctly simulated the variations in the snow line, the spatial variations in the SMB, and its trend with elevation. Yet current SMB values diverge from their classic linear representation with elevation, and stake data at high altitudes now display more negative SMB values than expected. By analyzing MODIS albedo, we observed that these values are caused by the disappearance of snow and associated feedback on melt rates. In addition, certain parts of Ampere Glacier could not be reproduced by the surface energy balance model because of overaccumulation due to wind deposition. Finally, the MODIS data, field data, and our models suggest that the acceleration of glacier wastage in Kerguelen is due to reduced net accumulation and an associated rise in the snow line since the 1970s. Publisher PDF Peer reviewed Article in Journal/Newspaper Ice cap Kerguelen Islands University of St Andrews: Digital Research Repository Kerguelen Kerguelen Islands Journal of Geophysical Research: Earth Surface 120 3 637 654 |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
GB Physical geography QE Geology NDAS GB QE |
spellingShingle |
GB Physical geography QE Geology NDAS GB QE Verfaillie, D. Favier, V. Dumont, M. Jomelli, V. Gilbert, A. Brunstein, D. Gallée, H. Rinterknecht, V. Menegoz, M. Frenot, Y. Recent glacier decline in the Kerguelen Islands (49°S, 69°E) derived from modeling, field observations, and satellite data |
topic_facet |
GB Physical geography QE Geology NDAS GB QE |
description |
Date of Acceptance: 28/02/2015 The retreat of glaciers in the Kerguelen Islands (49°S, 69°E) and their associated climatic causes have been analyzed using field data and Moderate Resolution Imaging Spectroradiometer (MODIS) satellite images to validate a positive degree-day (PDD) model forced by data from local meteorological stations. Mass balance measurements made during recent field campaigns on the largest glacier of the Cook Ice Cap were compared to data from the early 1970s, providing a 40 year view of the differences in the spatial distribution of surface mass balance (SMB). To obtain additional regional data for the validation of our models, we analyzed MODIS images (2000-2012) to determine if our model was capable of reproducing variations in the transient snow line. The PDD model correctly simulated the variations in the snow line, the spatial variations in the SMB, and its trend with elevation. Yet current SMB values diverge from their classic linear representation with elevation, and stake data at high altitudes now display more negative SMB values than expected. By analyzing MODIS albedo, we observed that these values are caused by the disappearance of snow and associated feedback on melt rates. In addition, certain parts of Ampere Glacier could not be reproduced by the surface energy balance model because of overaccumulation due to wind deposition. Finally, the MODIS data, field data, and our models suggest that the acceleration of glacier wastage in Kerguelen is due to reduced net accumulation and an associated rise in the snow line since the 1970s. Publisher PDF Peer reviewed |
author2 |
University of St Andrews. Earth and Environmental Sciences University of St Andrews. Marine Alliance for Science & Technology Scotland University of St Andrews. Scottish Oceans Institute |
format |
Article in Journal/Newspaper |
author |
Verfaillie, D. Favier, V. Dumont, M. Jomelli, V. Gilbert, A. Brunstein, D. Gallée, H. Rinterknecht, V. Menegoz, M. Frenot, Y. |
author_facet |
Verfaillie, D. Favier, V. Dumont, M. Jomelli, V. Gilbert, A. Brunstein, D. Gallée, H. Rinterknecht, V. Menegoz, M. Frenot, Y. |
author_sort |
Verfaillie, D. |
title |
Recent glacier decline in the Kerguelen Islands (49°S, 69°E) derived from modeling, field observations, and satellite data |
title_short |
Recent glacier decline in the Kerguelen Islands (49°S, 69°E) derived from modeling, field observations, and satellite data |
title_full |
Recent glacier decline in the Kerguelen Islands (49°S, 69°E) derived from modeling, field observations, and satellite data |
title_fullStr |
Recent glacier decline in the Kerguelen Islands (49°S, 69°E) derived from modeling, field observations, and satellite data |
title_full_unstemmed |
Recent glacier decline in the Kerguelen Islands (49°S, 69°E) derived from modeling, field observations, and satellite data |
title_sort |
recent glacier decline in the kerguelen islands (49°s, 69°e) derived from modeling, field observations, and satellite data |
publishDate |
2015 |
url |
http://hdl.handle.net/10023/7567 https://doi.org/10.1002/2014JF003329 |
geographic |
Kerguelen Kerguelen Islands |
geographic_facet |
Kerguelen Kerguelen Islands |
genre |
Ice cap Kerguelen Islands |
genre_facet |
Ice cap Kerguelen Islands |
op_relation |
Journal of Geophysical Research - Earth Surface Verfaillie , D , Favier , V , Dumont , M , Jomelli , V , Gilbert , A , Brunstein , D , Gallée , H , Rinterknecht , V , Menegoz , M & Frenot , Y 2015 , ' Recent glacier decline in the Kerguelen Islands (49°S, 69°E) derived from modeling, field observations, and satellite data ' , Journal of Geophysical Research - Earth Surface , vol. 120 , no. 3 , pp. 637-654 . https://doi.org/10.1002/2014JF003329 2169-9003 PURE: 190332603 PURE UUID: 25e24473-ad47-4e56-9496-b5a52c3116c8 Scopus: 84927584674 WOS: 000353694200014 http://hdl.handle.net/10023/7567 https://doi.org/10.1002/2014JF003329 |
op_rights |
© 2015. American Geophysical Union. All Rights Reserved. Reproduced in accordance with the publisher's author reuse policy. |
op_doi |
https://doi.org/10.1002/2014JF003329 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
120 |
container_issue |
3 |
container_start_page |
637 |
op_container_end_page |
654 |
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1770272165347721216 |