Unravelling the long-term, locally heterogenous response of Greenland glaciers observed in archival photography
<p>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...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2022-06-01
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| Series: | The Cryosphere |
| Online Access: | https://tc.copernicus.org/articles/16/2449/2022/tc-16-2449-2022.pdf |
| _version_ | 1811335217830428672 |
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| author | M. A. Cooper P. Lewińska W. A. P. Smith E. R. Hancock J. A. Dowdeswell D. M. Rippin |
| author_facet | M. A. Cooper P. Lewińska W. A. P. Smith E. R. Hancock J. A. Dowdeswell D. M. Rippin |
| author_sort | M. A. Cooper |
| collection | DOAJ |
| description | <p>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.</p> |
| first_indexed | 2024-04-13T17:20:52Z |
| format | Article |
| id | doaj.art-e6b96645a802431e9a290a52f882ff76 |
| institution | Directory Open Access Journal |
| issn | 1994-0416 1994-0424 |
| language | English |
| last_indexed | 2024-04-13T17:20:52Z |
| publishDate | 2022-06-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | The Cryosphere |
| spelling | doaj.art-e6b96645a802431e9a290a52f882ff762022-12-22T02:38:00ZengCopernicus PublicationsThe Cryosphere1994-04161994-04242022-06-01162449247010.5194/tc-16-2449-2022Unravelling the long-term, locally heterogenous response of Greenland glaciers observed in archival photographyM. A. Cooper0P. Lewińska1W. A. P. Smith2E. R. Hancock3J. A. Dowdeswell4D. M. Rippin5Department of Environment and Geography, University of York, York, UKDepartment of Computer Science, University of York, York, UKDepartment of Computer Science, University of York, York, UKDepartment of Computer Science, University of York, York, UKScott Polar Research Institute, University of Cambridge, Cambridge, UKDepartment of Environment and Geography, University of York, York, UK<p>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.</p>https://tc.copernicus.org/articles/16/2449/2022/tc-16-2449-2022.pdf |
| spellingShingle | M. A. Cooper P. Lewińska W. A. P. Smith E. R. Hancock J. A. Dowdeswell D. M. Rippin Unravelling the long-term, locally heterogenous response of Greenland glaciers observed in archival photography The Cryosphere |
| title | 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_short | 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 |
| url | https://tc.copernicus.org/articles/16/2449/2022/tc-16-2449-2022.pdf |
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