Satellite remote sensing of Antarctic sea-ice roughness using scatterometer data
While sea-ice concentration is frequently observed from polar orbiting passive microwave satellite instruments, equivalent large-scale information on sea-ice sub-metre-scale roughness is currently unknown. Roughness on this scale is closely related to sea-ice thickness, and has implications for prim...
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ftunivtasecite:oai:ecite.utas.edu.au:90791 2023-05-15T13:37:23+02:00 Satellite remote sensing of Antarctic sea-ice roughness using scatterometer data Fraser, AD Toyota, T Jansen, PW Kimura, N Lieser, JL Williams, GD Trujillo, E Leonard, K Maksym, T Massom, RA 2014 http://ecite.utas.edu.au/90791 en eng International Glaciological Society Fraser, AD and Toyota, T and Jansen, PW and Kimura, N and Lieser, JL and Williams, GD and Trujillo, E and Leonard, K and Maksym, T and Massom, RA, Satellite remote sensing of Antarctic sea-ice roughness using scatterometer data, International Symposium on Sea Ice in a Changing Environment - Proceedings of the Hobart Symposium, 10-14 March 2014, Hobart, Tasmania, Australia, pp. 69A779. (2014) [Conference Extract] http://ecite.utas.edu.au/90791 Earth Sciences Geophysics Geophysics not elsewhere classified Conference Extract NonPeerReviewed 2014 ftunivtasecite 2019-12-13T21:54:06Z While sea-ice concentration is frequently observed from polar orbiting passive microwave satellite instruments, equivalent large-scale information on sea-ice sub-metre-scale roughness is currently unknown. Roughness on this scale is closely related to sea-ice thickness, and has implications for primary productivity near the ice/ocean interface, and flow-on effects for ecosystems. C-band (~5 GHz) off-nadir microwave backscatter strength from sea ice is sensitive to many physical characteristics of the sea ice. During summertime and early autumn, liquid water-related processes dominate backscatter variability (formation of melt water and superimposed ice, snow/ice interface flooding). However, during freezing conditions, backscatter variability reduces in the inner pack, and backscatter becomes more representative of snow/ice interface or air/snow interface roughness (dry snow on the order of 1 m thick is largely transparent at C-band, though experimental results suggest a significant portion of backscatter occurs at the air/snow interface). We demonstrate that EUMETSAT Advanced Scatterometer (ASCAT) C-band scatterometer isotropic roughness data are sensitive to sea-ice roughness. Validation is provided by helicopter-mounted C-band nadir backscatter radar data and lidar swath data acquired in early spring, 2007, during the Australian-led Sea Ice Physics and Ecosystems eXperiment (SIPEX) campaign, and newly-acquired measurements of rugosity and snow/ice interface roughness from Autonomous Underwater Vehicle (AUV)-derived multibeam sonar acquired during the follow-up marine science voyage, SIPEX II. Using high-resolution sea-ice motion vectors from passive microwave imagery, we also investigate the links between large-scale sea-ice convergence and sub-metre-scale roughness. Conference Object Antarc* Antarctic Sea ice eCite UTAS (University of Tasmania) Antarctic |
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ftunivtasecite |
language |
English |
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Earth Sciences Geophysics Geophysics not elsewhere classified |
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Earth Sciences Geophysics Geophysics not elsewhere classified Fraser, AD Toyota, T Jansen, PW Kimura, N Lieser, JL Williams, GD Trujillo, E Leonard, K Maksym, T Massom, RA Satellite remote sensing of Antarctic sea-ice roughness using scatterometer data |
topic_facet |
Earth Sciences Geophysics Geophysics not elsewhere classified |
description |
While sea-ice concentration is frequently observed from polar orbiting passive microwave satellite instruments, equivalent large-scale information on sea-ice sub-metre-scale roughness is currently unknown. Roughness on this scale is closely related to sea-ice thickness, and has implications for primary productivity near the ice/ocean interface, and flow-on effects for ecosystems. C-band (~5 GHz) off-nadir microwave backscatter strength from sea ice is sensitive to many physical characteristics of the sea ice. During summertime and early autumn, liquid water-related processes dominate backscatter variability (formation of melt water and superimposed ice, snow/ice interface flooding). However, during freezing conditions, backscatter variability reduces in the inner pack, and backscatter becomes more representative of snow/ice interface or air/snow interface roughness (dry snow on the order of 1 m thick is largely transparent at C-band, though experimental results suggest a significant portion of backscatter occurs at the air/snow interface). We demonstrate that EUMETSAT Advanced Scatterometer (ASCAT) C-band scatterometer isotropic roughness data are sensitive to sea-ice roughness. Validation is provided by helicopter-mounted C-band nadir backscatter radar data and lidar swath data acquired in early spring, 2007, during the Australian-led Sea Ice Physics and Ecosystems eXperiment (SIPEX) campaign, and newly-acquired measurements of rugosity and snow/ice interface roughness from Autonomous Underwater Vehicle (AUV)-derived multibeam sonar acquired during the follow-up marine science voyage, SIPEX II. Using high-resolution sea-ice motion vectors from passive microwave imagery, we also investigate the links between large-scale sea-ice convergence and sub-metre-scale roughness. |
format |
Conference Object |
author |
Fraser, AD Toyota, T Jansen, PW Kimura, N Lieser, JL Williams, GD Trujillo, E Leonard, K Maksym, T Massom, RA |
author_facet |
Fraser, AD Toyota, T Jansen, PW Kimura, N Lieser, JL Williams, GD Trujillo, E Leonard, K Maksym, T Massom, RA |
author_sort |
Fraser, AD |
title |
Satellite remote sensing of Antarctic sea-ice roughness using scatterometer data |
title_short |
Satellite remote sensing of Antarctic sea-ice roughness using scatterometer data |
title_full |
Satellite remote sensing of Antarctic sea-ice roughness using scatterometer data |
title_fullStr |
Satellite remote sensing of Antarctic sea-ice roughness using scatterometer data |
title_full_unstemmed |
Satellite remote sensing of Antarctic sea-ice roughness using scatterometer data |
title_sort |
satellite remote sensing of antarctic sea-ice roughness using scatterometer data |
publisher |
International Glaciological Society |
publishDate |
2014 |
url |
http://ecite.utas.edu.au/90791 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_relation |
Fraser, AD and Toyota, T and Jansen, PW and Kimura, N and Lieser, JL and Williams, GD and Trujillo, E and Leonard, K and Maksym, T and Massom, RA, Satellite remote sensing of Antarctic sea-ice roughness using scatterometer data, International Symposium on Sea Ice in a Changing Environment - Proceedings of the Hobart Symposium, 10-14 March 2014, Hobart, Tasmania, Australia, pp. 69A779. (2014) [Conference Extract] http://ecite.utas.edu.au/90791 |
_version_ |
1766091191836737536 |