Using Arctic ice mass balance buoys for evaluation of modelled ice energy fluxes
Arctic sea ice has declined rapidly over recent decades. Models predict that the Arctic will be nearly ice-free by mid-century, but the spread in predictions of sea ice extent is currently large. The reasons for this spread are poorly understood, partly due to a lack of observations with which the p...
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ftcopernicus:oai:publications.copernicus.org:gmdd75934 2023-05-15T14:33:56+02:00 Using Arctic ice mass balance buoys for evaluation of modelled ice energy fluxes West, Alex Collins, Mat Blockley, Ed 2019-08-19 application/pdf https://doi.org/10.5194/gmd-2019-113 https://gmd.copernicus.org/preprints/gmd-2019-113/ eng eng doi:10.5194/gmd-2019-113 https://gmd.copernicus.org/preprints/gmd-2019-113/ eISSN: 1991-9603 Text 2019 ftcopernicus https://doi.org/10.5194/gmd-2019-113 2020-07-20T16:22:42Z Arctic sea ice has declined rapidly over recent decades. Models predict that the Arctic will be nearly ice-free by mid-century, but the spread in predictions of sea ice extent is currently large. The reasons for this spread are poorly understood, partly due to a lack of observations with which the processes by which Arctic atmospheric and oceanic forcing affect sea ice state can be examined. In this study, a method of estimating fluxes of top melt, top conduction, basal conduction and ocean heat flux from Arctic ice mass balance buoy elevation and temperature data is presented. The derived fluxes are used to evaluate modelled fluxes from the coupled climate model HadGEM2-ES in two densely sampled regions of the Arctic, the North Pole and Beaufort Sea. The evaluation shows the model to overestimate the magnitude of summer top melting fluxes, and winter conductive fluxes, results which are physically consistent with an independent sea ice and surface energy evaluation of the same model. Text Arctic Beaufort Sea North Pole Sea ice Copernicus Publications: E-Journals Arctic North Pole |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Arctic sea ice has declined rapidly over recent decades. Models predict that the Arctic will be nearly ice-free by mid-century, but the spread in predictions of sea ice extent is currently large. The reasons for this spread are poorly understood, partly due to a lack of observations with which the processes by which Arctic atmospheric and oceanic forcing affect sea ice state can be examined. In this study, a method of estimating fluxes of top melt, top conduction, basal conduction and ocean heat flux from Arctic ice mass balance buoy elevation and temperature data is presented. The derived fluxes are used to evaluate modelled fluxes from the coupled climate model HadGEM2-ES in two densely sampled regions of the Arctic, the North Pole and Beaufort Sea. The evaluation shows the model to overestimate the magnitude of summer top melting fluxes, and winter conductive fluxes, results which are physically consistent with an independent sea ice and surface energy evaluation of the same model. |
format |
Text |
author |
West, Alex Collins, Mat Blockley, Ed |
spellingShingle |
West, Alex Collins, Mat Blockley, Ed Using Arctic ice mass balance buoys for evaluation of modelled ice energy fluxes |
author_facet |
West, Alex Collins, Mat Blockley, Ed |
author_sort |
West, Alex |
title |
Using Arctic ice mass balance buoys for evaluation of modelled ice energy fluxes |
title_short |
Using Arctic ice mass balance buoys for evaluation of modelled ice energy fluxes |
title_full |
Using Arctic ice mass balance buoys for evaluation of modelled ice energy fluxes |
title_fullStr |
Using Arctic ice mass balance buoys for evaluation of modelled ice energy fluxes |
title_full_unstemmed |
Using Arctic ice mass balance buoys for evaluation of modelled ice energy fluxes |
title_sort |
using arctic ice mass balance buoys for evaluation of modelled ice energy fluxes |
publishDate |
2019 |
url |
https://doi.org/10.5194/gmd-2019-113 https://gmd.copernicus.org/preprints/gmd-2019-113/ |
geographic |
Arctic North Pole |
geographic_facet |
Arctic North Pole |
genre |
Arctic Beaufort Sea North Pole Sea ice |
genre_facet |
Arctic Beaufort Sea North Pole Sea ice |
op_source |
eISSN: 1991-9603 |
op_relation |
doi:10.5194/gmd-2019-113 https://gmd.copernicus.org/preprints/gmd-2019-113/ |
op_doi |
https://doi.org/10.5194/gmd-2019-113 |
_version_ |
1766307095816175616 |