dc.contributor.author | Salganik, Evgenii | |
dc.contributor.author | Lange, Benjamin Allen | |
dc.contributor.author | Katlein, Christian | |
dc.contributor.author | Matero, Ilkka | |
dc.contributor.author | Anhaus, Philipp | |
dc.contributor.author | Muilwijk, Morven | |
dc.contributor.author | Høyland, Knut Vilhelm | |
dc.contributor.author | Granskog, Mats | |
dc.date.accessioned | 2024-02-08T11:56:06Z | |
dc.date.available | 2024-02-08T11:56:06Z | |
dc.date.created | 2023-11-20T14:06:37Z | |
dc.date.issued | 2023 | |
dc.identifier.citation | The Cryosphere. 2023, 17 (11), 4873-4887. | |
dc.identifier.issn | 1994-0416 | |
dc.identifier.uri | https://hdl.handle.net/11250/3116377 | |
dc.description.abstract | Sea-ice ridges constitute a large fraction of the total Arctic sea-ice area (up to 40 %–50 %); nevertheless, they are the least studied part of the ice pack. Here we investigate sea-ice melt rates using rare, repeated underwater multibeam sonar surveys that cover a period of 1 month during the advanced stage of sea-ice melt. Bottom melt increases with ice draft for first- and second-year level ice and a first-year ice ridge, with an average of 0.46, 0.55, and 0.95 m of total snow and ice melt in the observation period, respectively. On average, the studied ridge had a 4.6 m keel bottom draft, was 42 m wide, and had 4 % macroporosity. While bottom melt rates of ridge keel were 3.8 times higher than first-year level ice, surface melt rates were almost identical but responsible for 40 % of ridge draft decrease. Average cross-sectional keel melt ranged from 0.2 to 2.6 m, with a maximum point ice loss of 6 m, showcasing its large spatial variability. We attribute 57 % of the ridge total (surface and bottom) melt variability to keel draft (36 %), slope (32 %), and width (27 %), with higher melt for ridges with a larger draft, a steeper slope, and a smaller width. The melt rate of the ridge keel flanks was proportional to the draft, with increased keel melt within 10 m of its bottom corners and the melt rates between these corners comparable to the melt rates of level ice. | |
dc.description.abstract | Utforskning av skrugarder frysing og smelting i Polhavet | |
dc.description.abstract | Observations of preferential summer melt of Arctic sea-ice ridge keels from repeated multibeam sonar surveys | |
dc.language.iso | eng | |
dc.subject | Sjøis | |
dc.subject | Sea ice | |
dc.subject | Havis tykkelse | |
dc.subject | Sea Ice Thickness | |
dc.subject | Polhavet | |
dc.subject | Arctic ocean | |
dc.title | Observations of preferential summer melt of Arctic sea-ice ridge keels from repeated multibeam sonar surveys | |
dc.title.alternative | Utforskning av skrugarder frysing og smelting i Polhavet | |
dc.title.alternative | Observations of preferential summer melt of Arctic sea-ice ridge keels from repeated multibeam sonar surveys | |
dc.type | Peer reviewed | |
dc.type | Journal article | |
dc.description.version | publishedVersion | |
dc.subject.nsi | VDP::Oseanografi: 452 | |
dc.subject.nsi | VDP::Oceanography: 452 | |
dc.source.pagenumber | 4873-4887 | |
dc.source.volume | 17 | |
dc.source.journal | The Cryosphere | |
dc.source.issue | 11 | |
dc.identifier.doi | 10.5194/tc-17-4873-2023 | |
dc.identifier.cristin | 2198898 | |
dc.relation.project | Norges forskningsråd: 280292 | |
dc.relation.project | Norges forskningsråd: 328957 | |
dc.relation.project | Norges forskningsråd: 280531 | |
dc.relation.project | EC/H2020/101003826 | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |