Airborne observations of summer thinning of multi‐year sea ice originating from the Lincoln Sea
To better understand recent changes of Arctic sea ice thickness and extent, it is important to distinguish between the contributions of winter growth and summer melt to the sea ice mass balance. In this study we present a Lagrangian approach to quantify summer sea ice melt in which multiyear ice (MY...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://epic.awi.de/id/eprint/51873/ https://hdl.handle.net/10013/epic.7a091d40-3a8d-4ad7-818b-4d32f855e0b2 |
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ftawi:oai:epic.awi.de:51873 2024-09-15T18:17:51+00:00 Airborne observations of summer thinning of multi‐year sea ice originating from the Lincoln Sea Lange, Benjamin A. Beckers, Justin F. Casey, J.A. Haas, Christian 2018 https://epic.awi.de/id/eprint/51873/ https://hdl.handle.net/10013/epic.7a091d40-3a8d-4ad7-818b-4d32f855e0b2 unknown Lange, B. A. , Beckers, J. F. , Casey, J. and Haas, C. orcid:0000-0002-7674-3500 (2018) Airborne observations of summer thinning of multi‐year sea ice originating from the Lincoln Sea , Journal of Geophysical Research: Oceans . doi:10.1029/2018JC014383 <https://doi.org/10.1029/2018JC014383> , hdl:10013/epic.7a091d40-3a8d-4ad7-818b-4d32f855e0b2 EPIC3Journal of Geophysical Research: Oceans Article isiRev 2018 ftawi https://doi.org/10.1029/2018JC014383 2024-06-24T04:24:41Z To better understand recent changes of Arctic sea ice thickness and extent, it is important to distinguish between the contributions of winter growth and summer melt to the sea ice mass balance. In this study we present a Lagrangian approach to quantify summer sea ice melt in which multiyear ice (MYI) floes that were surveyed by airborne electromagnetic thickness sounding within Nares Strait during summer were backtracked, using satellite imagery, to a region in close proximity (3–20 km) to spring ice thickness surveys carried out in the Lincoln Sea. Typical modal total MYI thicknesses, including ~0.4‐m snow, ranged between 3.9 and 4.7 m in the Lincoln Sea during April. Ice‐only modal thicknesses were between 2.2 and 3.0 m in Nares Strait during August. Total thinning including snow and ice was 1.3 ± 0.1 m including 0.4 ± 0.09 m of snow melt and 0.9 ± 0.2 m of ice melt. This translates to a seasonal net heat input of 305 ± 69 MJ/m^2 (262 ± 60 MJ/m^2 for ice only) and seasonal net heat flux of 57 ± 13 W/m^2 (45 ± 10 W/m^2 for ice only), which is unlikely to be explained by solar radiation fluxes alone. Furthermore, our approach provides an improvement on traditional ice mass balance buoy estimates because it integrates melt over larger spatial scales, where melt can be highly variable due to differential melt experienced between melt ponds, bare ice, hummocks, and ridges. Article in Journal/Newspaper Lincoln Sea Nares strait Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Journal of Geophysical Research: Oceans 124 1 243 266 |
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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 |
To better understand recent changes of Arctic sea ice thickness and extent, it is important to distinguish between the contributions of winter growth and summer melt to the sea ice mass balance. In this study we present a Lagrangian approach to quantify summer sea ice melt in which multiyear ice (MYI) floes that were surveyed by airborne electromagnetic thickness sounding within Nares Strait during summer were backtracked, using satellite imagery, to a region in close proximity (3–20 km) to spring ice thickness surveys carried out in the Lincoln Sea. Typical modal total MYI thicknesses, including ~0.4‐m snow, ranged between 3.9 and 4.7 m in the Lincoln Sea during April. Ice‐only modal thicknesses were between 2.2 and 3.0 m in Nares Strait during August. Total thinning including snow and ice was 1.3 ± 0.1 m including 0.4 ± 0.09 m of snow melt and 0.9 ± 0.2 m of ice melt. This translates to a seasonal net heat input of 305 ± 69 MJ/m^2 (262 ± 60 MJ/m^2 for ice only) and seasonal net heat flux of 57 ± 13 W/m^2 (45 ± 10 W/m^2 for ice only), which is unlikely to be explained by solar radiation fluxes alone. Furthermore, our approach provides an improvement on traditional ice mass balance buoy estimates because it integrates melt over larger spatial scales, where melt can be highly variable due to differential melt experienced between melt ponds, bare ice, hummocks, and ridges. |
format |
Article in Journal/Newspaper |
author |
Lange, Benjamin A. Beckers, Justin F. Casey, J.A. Haas, Christian |
spellingShingle |
Lange, Benjamin A. Beckers, Justin F. Casey, J.A. Haas, Christian Airborne observations of summer thinning of multi‐year sea ice originating from the Lincoln Sea |
author_facet |
Lange, Benjamin A. Beckers, Justin F. Casey, J.A. Haas, Christian |
author_sort |
Lange, Benjamin A. |
title |
Airborne observations of summer thinning of multi‐year sea ice originating from the Lincoln Sea |
title_short |
Airborne observations of summer thinning of multi‐year sea ice originating from the Lincoln Sea |
title_full |
Airborne observations of summer thinning of multi‐year sea ice originating from the Lincoln Sea |
title_fullStr |
Airborne observations of summer thinning of multi‐year sea ice originating from the Lincoln Sea |
title_full_unstemmed |
Airborne observations of summer thinning of multi‐year sea ice originating from the Lincoln Sea |
title_sort |
airborne observations of summer thinning of multi‐year sea ice originating from the lincoln sea |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/51873/ https://hdl.handle.net/10013/epic.7a091d40-3a8d-4ad7-818b-4d32f855e0b2 |
genre |
Lincoln Sea Nares strait Sea ice |
genre_facet |
Lincoln Sea Nares strait Sea ice |
op_source |
EPIC3Journal of Geophysical Research: Oceans |
op_relation |
Lange, B. A. , Beckers, J. F. , Casey, J. and Haas, C. orcid:0000-0002-7674-3500 (2018) Airborne observations of summer thinning of multi‐year sea ice originating from the Lincoln Sea , Journal of Geophysical Research: Oceans . doi:10.1029/2018JC014383 <https://doi.org/10.1029/2018JC014383> , hdl:10013/epic.7a091d40-3a8d-4ad7-818b-4d32f855e0b2 |
op_doi |
https://doi.org/10.1029/2018JC014383 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
124 |
container_issue |
1 |
container_start_page |
243 |
op_container_end_page |
266 |
_version_ |
1810455941202575360 |