Unravelling the long-term, locally heterogenous response of Greenland glaciers observed in archival photography
We present an approach for extracting quantifiable information from archival aerial photographs to extend the temporal record of change over a region of the central eastern Greenland Ice Sheet. The photographs we use were gathered in the 1930s as part of a surveying expedition, and so they were not...
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Online Access: | https://doi.org/10.5194/tc-16-2449-2022 https://tc.copernicus.org/articles/16/2449/2022/ |
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ftcopernicus:oai:publications.copernicus.org:tc96988 2023-05-15T16:27:18+02:00 Unravelling the long-term, locally heterogenous response of Greenland glaciers observed in archival photography Cooper, Michael A. Lewińska, Paulina Smith, William A. P. Hancock, Edwin R. Dowdeswell, Julian A. Rippin, David M. 2022-06-23 application/pdf https://doi.org/10.5194/tc-16-2449-2022 https://tc.copernicus.org/articles/16/2449/2022/ eng eng doi:10.5194/tc-16-2449-2022 https://tc.copernicus.org/articles/16/2449/2022/ eISSN: 1994-0424 Text 2022 ftcopernicus https://doi.org/10.5194/tc-16-2449-2022 2022-06-27T16:22:42Z We present an approach for extracting quantifiable information from archival aerial photographs to extend the temporal record of change over a region of the central eastern Greenland Ice Sheet. The photographs we use were gathered in the 1930s as part of a surveying expedition, and so they were not acquired with photogrammetric analysis in mind. Nevertheless, we are able to make opportunistic use of this imagery, as well as additional, novel datasets, to explore changes at ice margins well before the advent of conventional satellite technology. The insights that a longer record of ice margin change bring is crucial for improving our understanding of how glaciers are responding to the changing climate. In addition, our work focuses on a series of relatively small and little studied outlet glaciers from the eastern margin of the ice sheet. We show that whilst air and sea surface temperatures are important controls on the rates at which these ice masses change, there is also significant heterogeneity in their responses, with non-climatic controls (such as the role of bathymetry in front of calving margins) being extremely important. In general, there is often a tendency to focus either on changes of the Greenland Ice Sheet as a whole, or on regional variations. Here, we suggest that even this approach masks important variability, and full understanding of the behaviour and response of the ice sheet requires us to consider changes that are taking place at the scale of individual glaciers. Text Greenland Ice Sheet Copernicus Publications: E-Journals Greenland The Cryosphere 16 6 2449 2470 |
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Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
We present an approach for extracting quantifiable information from archival aerial photographs to extend the temporal record of change over a region of the central eastern Greenland Ice Sheet. The photographs we use were gathered in the 1930s as part of a surveying expedition, and so they were not acquired with photogrammetric analysis in mind. Nevertheless, we are able to make opportunistic use of this imagery, as well as additional, novel datasets, to explore changes at ice margins well before the advent of conventional satellite technology. The insights that a longer record of ice margin change bring is crucial for improving our understanding of how glaciers are responding to the changing climate. In addition, our work focuses on a series of relatively small and little studied outlet glaciers from the eastern margin of the ice sheet. We show that whilst air and sea surface temperatures are important controls on the rates at which these ice masses change, there is also significant heterogeneity in their responses, with non-climatic controls (such as the role of bathymetry in front of calving margins) being extremely important. In general, there is often a tendency to focus either on changes of the Greenland Ice Sheet as a whole, or on regional variations. Here, we suggest that even this approach masks important variability, and full understanding of the behaviour and response of the ice sheet requires us to consider changes that are taking place at the scale of individual glaciers. |
format |
Text |
author |
Cooper, Michael A. Lewińska, Paulina Smith, William A. P. Hancock, Edwin R. Dowdeswell, Julian A. Rippin, David M. |
spellingShingle |
Cooper, Michael A. Lewińska, Paulina Smith, William A. P. Hancock, Edwin R. Dowdeswell, Julian A. Rippin, David M. Unravelling the long-term, locally heterogenous response of Greenland glaciers observed in archival photography |
author_facet |
Cooper, Michael A. Lewińska, Paulina Smith, William A. P. Hancock, Edwin R. Dowdeswell, Julian A. Rippin, David M. |
author_sort |
Cooper, Michael A. |
title |
Unravelling the long-term, locally heterogenous response of Greenland glaciers observed in archival photography |
title_short |
Unravelling the long-term, locally heterogenous response of Greenland glaciers observed in archival photography |
title_full |
Unravelling the long-term, locally heterogenous response of Greenland glaciers observed in archival photography |
title_fullStr |
Unravelling the long-term, locally heterogenous response of Greenland glaciers observed in archival photography |
title_full_unstemmed |
Unravelling the long-term, locally heterogenous response of Greenland glaciers observed in archival photography |
title_sort |
unravelling the long-term, locally heterogenous response of greenland glaciers observed in archival photography |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-2449-2022 https://tc.copernicus.org/articles/16/2449/2022/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-16-2449-2022 https://tc.copernicus.org/articles/16/2449/2022/ |
op_doi |
https://doi.org/10.5194/tc-16-2449-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
6 |
container_start_page |
2449 |
op_container_end_page |
2470 |
_version_ |
1766016426776199168 |