Impact of Sea Ice Drift Retrieval Errors, Discretization and Grid Type on Calculations of Sea Ice Deformation
We studied two issues to be considered in the calculation of parameters characterizing sea ice deformation: the effect of uncertainties in an automatically retrieved sea ice drift field, and the influence of the type of drift vector grid. Sea ice deformation changes the local ice mass balance and th...
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ftawi:oai:epic.awi.de:46703 2023-05-15T18:16:45+02:00 Impact of Sea Ice Drift Retrieval Errors, Discretization and Grid Type on Calculations of Sea Ice Deformation Griebel, Jakob Dierking, Wolfgang 2018-03-03 application/pdf https://epic.awi.de/id/eprint/46703/ https://epic.awi.de/id/eprint/46703/1/2018_DeformationErrors_RS.pdf https://hdl.handle.net/10013/epic.9457f5b1-90d2-4df3-bc4a-bdb1d26bd007 https://hdl.handle.net/ unknown MDPI https://epic.awi.de/id/eprint/46703/1/2018_DeformationErrors_RS.pdf https://hdl.handle.net/ Griebel, J. and Dierking, W. orcid:0000-0002-5031-648X (2018) Impact of Sea Ice Drift Retrieval Errors, Discretization and Grid Type on Calculations of Sea Ice Deformation , Remote Sensing, 10 (393) . doi:10.3390/rs1030393 <https://doi.org/10.3390/rs1030393> , hdl:10013/epic.9457f5b1-90d2-4df3-bc4a-bdb1d26bd007 EPIC3Remote Sensing, MDPI, 10(393) Article isiRev 2018 ftawi https://doi.org/10.3390/rs1030393 2021-12-24T15:43:41Z We studied two issues to be considered in the calculation of parameters characterizing sea ice deformation: the effect of uncertainties in an automatically retrieved sea ice drift field, and the influence of the type of drift vector grid. Sea ice deformation changes the local ice mass balance and the interaction between atmosphere, ice, and ocean, and constitutes a hazard to marine traffic and operations. Due to numerical effects, the results of deformation retrievals may predict, e.g., openings and closings of the ice cover that do not exist in reality. We focus specifically on fields of ice drift obtained from synthetic aperture radar (SAR) imagery and analyze the Propagated Drift Retrieval Error (PDRE) and the Boundary Definition Error (BDE). From the theory of error propagation, the PDRE for the calculated deformation parameters can be estimated. To quantify the BDE, we devise five different grid types and compare theoretical expectation and numerical results for different deformation parameters assuming three scenarios: pure divergence, pure shear, and a mixture of both. Our findings for both sources of error help to set up optimal deformation retrieval schemes and are also useful for other applications working with vector fields and scalar parameters derived therefrom. Article in Journal/Newspaper Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Remote Sensing 1 3 393 407 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
We studied two issues to be considered in the calculation of parameters characterizing sea ice deformation: the effect of uncertainties in an automatically retrieved sea ice drift field, and the influence of the type of drift vector grid. Sea ice deformation changes the local ice mass balance and the interaction between atmosphere, ice, and ocean, and constitutes a hazard to marine traffic and operations. Due to numerical effects, the results of deformation retrievals may predict, e.g., openings and closings of the ice cover that do not exist in reality. We focus specifically on fields of ice drift obtained from synthetic aperture radar (SAR) imagery and analyze the Propagated Drift Retrieval Error (PDRE) and the Boundary Definition Error (BDE). From the theory of error propagation, the PDRE for the calculated deformation parameters can be estimated. To quantify the BDE, we devise five different grid types and compare theoretical expectation and numerical results for different deformation parameters assuming three scenarios: pure divergence, pure shear, and a mixture of both. Our findings for both sources of error help to set up optimal deformation retrieval schemes and are also useful for other applications working with vector fields and scalar parameters derived therefrom. |
format |
Article in Journal/Newspaper |
author |
Griebel, Jakob Dierking, Wolfgang |
spellingShingle |
Griebel, Jakob Dierking, Wolfgang Impact of Sea Ice Drift Retrieval Errors, Discretization and Grid Type on Calculations of Sea Ice Deformation |
author_facet |
Griebel, Jakob Dierking, Wolfgang |
author_sort |
Griebel, Jakob |
title |
Impact of Sea Ice Drift Retrieval Errors, Discretization and Grid Type on Calculations of Sea Ice Deformation |
title_short |
Impact of Sea Ice Drift Retrieval Errors, Discretization and Grid Type on Calculations of Sea Ice Deformation |
title_full |
Impact of Sea Ice Drift Retrieval Errors, Discretization and Grid Type on Calculations of Sea Ice Deformation |
title_fullStr |
Impact of Sea Ice Drift Retrieval Errors, Discretization and Grid Type on Calculations of Sea Ice Deformation |
title_full_unstemmed |
Impact of Sea Ice Drift Retrieval Errors, Discretization and Grid Type on Calculations of Sea Ice Deformation |
title_sort |
impact of sea ice drift retrieval errors, discretization and grid type on calculations of sea ice deformation |
publisher |
MDPI |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/46703/ https://epic.awi.de/id/eprint/46703/1/2018_DeformationErrors_RS.pdf https://hdl.handle.net/10013/epic.9457f5b1-90d2-4df3-bc4a-bdb1d26bd007 https://hdl.handle.net/ |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
EPIC3Remote Sensing, MDPI, 10(393) |
op_relation |
https://epic.awi.de/id/eprint/46703/1/2018_DeformationErrors_RS.pdf https://hdl.handle.net/ Griebel, J. and Dierking, W. orcid:0000-0002-5031-648X (2018) Impact of Sea Ice Drift Retrieval Errors, Discretization and Grid Type on Calculations of Sea Ice Deformation , Remote Sensing, 10 (393) . doi:10.3390/rs1030393 <https://doi.org/10.3390/rs1030393> , hdl:10013/epic.9457f5b1-90d2-4df3-bc4a-bdb1d26bd007 |
op_doi |
https://doi.org/10.3390/rs1030393 |
container_title |
Remote Sensing |
container_volume |
1 |
container_issue |
3 |
container_start_page |
393 |
op_container_end_page |
407 |
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1766190608654794752 |