Measuring sea ice draft and coverage with moored upward looking sonars
Abstract: Presented is a method to derive data of ice draft and coverage from acoustic measurements madewith moored Upward Looking Sonars (ULSs), sounding the sea surface remotely from below. The method hasbeen developed on the basis of two-year long time series obtained from four locations in the W...
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Online Access: | https://epic.awi.de/id/eprint/3052/ https://hdl.handle.net/10013/epic.13636 |
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ftawi:oai:epic.awi.de:3052 2023-09-05T13:23:04+02:00 Measuring sea ice draft and coverage with moored upward looking sonars Strass, Volker 1998 https://epic.awi.de/id/eprint/3052/ https://hdl.handle.net/10013/epic.13636 unknown Strass, V. orcid:0000-0002-7539-1400 (1998) Measuring sea ice draft and coverage with moored upward looking sonars , Deep-Sea Research I, 45 , pp. 795-818 . hdl:10013/epic.13636 EPIC3Deep-Sea Research I, 45, pp. 795-818 Article isiRev 1998 ftawi 2023-08-22T19:43:47Z Abstract: Presented is a method to derive data of ice draft and coverage from acoustic measurements madewith moored Upward Looking Sonars (ULSs), sounding the sea surface remotely from below. The method hasbeen developed on the basis of two-year long time series obtained from four locations in the Weddell Sea. Ittakes into account the variations of sound speed and density which occur between the target and the instrument,the variations of the surface air pressure, and a possible bias of the mean ice draft within the ensonified windowwhich results as the combined effect of beam spreading and skewed ice distributions; ice and open water arediscriminated making use of their specific echo amplitude signatures. The residual total error in the determinedmean ice draft is estimated as 4 cm, compared to an initial error of almost 90 cm in the original uncorrecteddata. Suggestions for further improvement of the instruments are made at the end of the paper. Article in Journal/Newspaper Sea ice Weddell Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Weddell Weddell Sea |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Abstract: Presented is a method to derive data of ice draft and coverage from acoustic measurements madewith moored Upward Looking Sonars (ULSs), sounding the sea surface remotely from below. The method hasbeen developed on the basis of two-year long time series obtained from four locations in the Weddell Sea. Ittakes into account the variations of sound speed and density which occur between the target and the instrument,the variations of the surface air pressure, and a possible bias of the mean ice draft within the ensonified windowwhich results as the combined effect of beam spreading and skewed ice distributions; ice and open water arediscriminated making use of their specific echo amplitude signatures. The residual total error in the determinedmean ice draft is estimated as 4 cm, compared to an initial error of almost 90 cm in the original uncorrecteddata. Suggestions for further improvement of the instruments are made at the end of the paper. |
format |
Article in Journal/Newspaper |
author |
Strass, Volker |
spellingShingle |
Strass, Volker Measuring sea ice draft and coverage with moored upward looking sonars |
author_facet |
Strass, Volker |
author_sort |
Strass, Volker |
title |
Measuring sea ice draft and coverage with moored upward looking sonars |
title_short |
Measuring sea ice draft and coverage with moored upward looking sonars |
title_full |
Measuring sea ice draft and coverage with moored upward looking sonars |
title_fullStr |
Measuring sea ice draft and coverage with moored upward looking sonars |
title_full_unstemmed |
Measuring sea ice draft and coverage with moored upward looking sonars |
title_sort |
measuring sea ice draft and coverage with moored upward looking sonars |
publishDate |
1998 |
url |
https://epic.awi.de/id/eprint/3052/ https://hdl.handle.net/10013/epic.13636 |
geographic |
Weddell Weddell Sea |
geographic_facet |
Weddell Weddell Sea |
genre |
Sea ice Weddell Sea |
genre_facet |
Sea ice Weddell Sea |
op_source |
EPIC3Deep-Sea Research I, 45, pp. 795-818 |
op_relation |
Strass, V. orcid:0000-0002-7539-1400 (1998) Measuring sea ice draft and coverage with moored upward looking sonars , Deep-Sea Research I, 45 , pp. 795-818 . hdl:10013/epic.13636 |
_version_ |
1776203645433413632 |