Effects of different footprint areas on the comparability between measurements of sea ice freeboard
The significant loss of Arctic sea ice during the last decades shows the sensitivity of the sea-ice system to changes in global climate. To distinguish between natural variability and the impact of global warming, an understanding of processes and feedbacks is necessary, and for that, consistent and...
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ftawi:oai:epic.awi.de:35386 2024-09-15T17:46:00+00:00 Effects of different footprint areas on the comparability between measurements of sea ice freeboard Schwegmann, Sandra Hendricks, Stefan Haas, Christian Herber, Andreas 2014-03-10 application/pdf https://epic.awi.de/id/eprint/35386/ https://epic.awi.de/id/eprint/35386/1/20140310IGS_Poster_mod.pdf https://hdl.handle.net/10013/epic.43367 https://hdl.handle.net/10013/epic.43367.d001 unknown https://epic.awi.de/id/eprint/35386/1/20140310IGS_Poster_mod.pdf https://hdl.handle.net/10013/epic.43367.d001 Schwegmann, S. , Hendricks, S. orcid:0000-0002-1412-3146 , Haas, C. and Herber, A. orcid:0000-0001-6651-3835 (2014) Effects of different footprint areas on the comparability between measurements of sea ice freeboard , IGS International Symposium on Sea Ice in a Changing Environment, Hobart, Tasmania, Australia, 10 March 2014 - 14 March 2014 . hdl:10013/epic.43367 EPIC3IGS International Symposium on Sea Ice in a Changing Environment, Hobart, Tasmania, Australia, 2014-03-10-2014-03-14 Conference notRev 2014 ftawi 2024-06-24T04:09:53Z The significant loss of Arctic sea ice during the last decades shows the sensitivity of the sea-ice system to changes in global climate. To distinguish between natural variability and the impact of global warming, an understanding of processes and feedbacks is necessary, and for that, consistent and comprehensive measurements of the most important sea-ice properties are required. While sea-ice concentration is observed routinely year-round since the beginning of the satellite era, strategies to investigate the sea-ice thickness distribution have been developed only recently. These are crucially required for an examination of sea-ice mass changes. Presently, ice thickness observations are mainly based on freeboard measurements by means of satellite laser and radar altimetry. To contribute to the interpretation of these sea-ice thickness products, available airborne thickness and freeboard data were collected within the Sea Ice Downstream Services for Arctic and Antarctic Users and Stakeholders (SIDARUS) EU-Project, and have been analyzed with respect to their usability for the validation of the large-scale satellite products. One major challenge in comparing satellite and airborne measurements is the different footprint area of these methods. Therefore, statistical parameters like the variability of freeboard within the common footprint areas have been analyzed from measurements made during the PAMARCMIP 2011 campaign in order to determine the differences between point measurements and areal averages. It turned out that mean freeboard is less dependent of the freeboard areas than the modal values are. Furthermore, differences in modal and mean values for the range of chosen footprint areas have been related to their dependency on different ice characteristics and length scales of freeboard and thickness profiles. Also for this comparison, mean values are found to be more representative, as the results are mostly independent from the footprint but depend more on the length scales. However, there was no length ... Conference Object Antarc* Antarctic Global warming Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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description |
The significant loss of Arctic sea ice during the last decades shows the sensitivity of the sea-ice system to changes in global climate. To distinguish between natural variability and the impact of global warming, an understanding of processes and feedbacks is necessary, and for that, consistent and comprehensive measurements of the most important sea-ice properties are required. While sea-ice concentration is observed routinely year-round since the beginning of the satellite era, strategies to investigate the sea-ice thickness distribution have been developed only recently. These are crucially required for an examination of sea-ice mass changes. Presently, ice thickness observations are mainly based on freeboard measurements by means of satellite laser and radar altimetry. To contribute to the interpretation of these sea-ice thickness products, available airborne thickness and freeboard data were collected within the Sea Ice Downstream Services for Arctic and Antarctic Users and Stakeholders (SIDARUS) EU-Project, and have been analyzed with respect to their usability for the validation of the large-scale satellite products. One major challenge in comparing satellite and airborne measurements is the different footprint area of these methods. Therefore, statistical parameters like the variability of freeboard within the common footprint areas have been analyzed from measurements made during the PAMARCMIP 2011 campaign in order to determine the differences between point measurements and areal averages. It turned out that mean freeboard is less dependent of the freeboard areas than the modal values are. Furthermore, differences in modal and mean values for the range of chosen footprint areas have been related to their dependency on different ice characteristics and length scales of freeboard and thickness profiles. Also for this comparison, mean values are found to be more representative, as the results are mostly independent from the footprint but depend more on the length scales. However, there was no length ... |
format |
Conference Object |
author |
Schwegmann, Sandra Hendricks, Stefan Haas, Christian Herber, Andreas |
spellingShingle |
Schwegmann, Sandra Hendricks, Stefan Haas, Christian Herber, Andreas Effects of different footprint areas on the comparability between measurements of sea ice freeboard |
author_facet |
Schwegmann, Sandra Hendricks, Stefan Haas, Christian Herber, Andreas |
author_sort |
Schwegmann, Sandra |
title |
Effects of different footprint areas on the comparability between measurements of sea ice freeboard |
title_short |
Effects of different footprint areas on the comparability between measurements of sea ice freeboard |
title_full |
Effects of different footprint areas on the comparability between measurements of sea ice freeboard |
title_fullStr |
Effects of different footprint areas on the comparability between measurements of sea ice freeboard |
title_full_unstemmed |
Effects of different footprint areas on the comparability between measurements of sea ice freeboard |
title_sort |
effects of different footprint areas on the comparability between measurements of sea ice freeboard |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/35386/ https://epic.awi.de/id/eprint/35386/1/20140310IGS_Poster_mod.pdf https://hdl.handle.net/10013/epic.43367 https://hdl.handle.net/10013/epic.43367.d001 |
genre |
Antarc* Antarctic Global warming Sea ice |
genre_facet |
Antarc* Antarctic Global warming Sea ice |
op_source |
EPIC3IGS International Symposium on Sea Ice in a Changing Environment, Hobart, Tasmania, Australia, 2014-03-10-2014-03-14 |
op_relation |
https://epic.awi.de/id/eprint/35386/1/20140310IGS_Poster_mod.pdf https://hdl.handle.net/10013/epic.43367.d001 Schwegmann, S. , Hendricks, S. orcid:0000-0002-1412-3146 , Haas, C. and Herber, A. orcid:0000-0001-6651-3835 (2014) Effects of different footprint areas on the comparability between measurements of sea ice freeboard , IGS International Symposium on Sea Ice in a Changing Environment, Hobart, Tasmania, Australia, 10 March 2014 - 14 March 2014 . hdl:10013/epic.43367 |
_version_ |
1810493947849474048 |