An evaluation of surface climatology in state-of-the-art reanalyses over the Antarctic Ice Sheet
In this study, we evaluate output of near-surface atmospheric variables over the Antarctic Ice Sheet from four reanalyses: the new European Centre for Medium-Range Weather Forecasts ERA-5 and its predecessor ERA-Interim, the Climate Forecast System Reanalysis (CFSR), and the Modern-Era Retrospective...
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ftvliz:oai:oma.vliz.be:322935 2023-05-15T13:53:33+02:00 An evaluation of surface climatology in state-of-the-art reanalyses over the Antarctic Ice Sheet Gossart, A. Helsen, S. Lenaerts, J.T.M. Vanden Broucke, S. van Lipzig, N.P.M. Souverijns, N. 2019 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=322935 en eng info:eu-repo/semantics/altIdentifier/wos/000486261000002 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1175/JCLI-D-19-0030.1 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=322935 info:eu-repo/semantics/restrictedAccess %3Ci%3EJ.+Clim.+32%2820%29%3C%2Fi%3E%3A+6899-6915.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1175%2FJCLI-D-19-0030.1%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1175%2FJCLI-D-19-0030.1%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 ftvliz https://doi.org/10.1175/JCLI-D-19-0030.1 2022-05-01T11:34:58Z In this study, we evaluate output of near-surface atmospheric variables over the Antarctic Ice Sheet from four reanalyses: the new European Centre for Medium-Range Weather Forecasts ERA-5 and its predecessor ERA-Interim, the Climate Forecast System Reanalysis (CFSR), and the Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2). The near-surface temperature, wind speed, and relative humidity are compared with datasets of in situ observations, together with an assessment of the simulated surface mass balance (approximated by precipitation minus evaporation). No reanalysis clearly stands out as the best performing for all areas, seasons, and variables, and each of the reanalyses displays different biases. CFSR strongly overestimates the relative humidity during all seasons whereas ERA-5 and MERRA-2 (and, to a lesser extent, ERA-Interim) strongly underestimate relative humidity during winter. ERA-5 captures the seasonal cycle of near-surface temperature best and shows the smallest bias relative to the observations. The other reanalyses show a general temperature underestimation during the winter months in the Antarctic interior and overestimation in the coastal areas. All reanalyses underestimate the mean near-surface winds in the interior (except MERRA-2) and along the coast during the entire year. The winds at the Antarctic Peninsula are overestimated by all reanalyses except MERRA-2. All models are able to capture snowfall patterns related to atmospheric rivers, with varying accuracy. Accumulation is best represented by ERA-5, although it underestimates observed surface mass balance and there is some variability in the accumulation over the different elevation classes, for all reanalyses. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ice Sheet Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Antarctic The Antarctic Antarctic Peninsula Merra ENVELOPE(12.615,12.615,65.816,65.816) Journal of Climate 32 20 6899 6915 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
In this study, we evaluate output of near-surface atmospheric variables over the Antarctic Ice Sheet from four reanalyses: the new European Centre for Medium-Range Weather Forecasts ERA-5 and its predecessor ERA-Interim, the Climate Forecast System Reanalysis (CFSR), and the Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2). The near-surface temperature, wind speed, and relative humidity are compared with datasets of in situ observations, together with an assessment of the simulated surface mass balance (approximated by precipitation minus evaporation). No reanalysis clearly stands out as the best performing for all areas, seasons, and variables, and each of the reanalyses displays different biases. CFSR strongly overestimates the relative humidity during all seasons whereas ERA-5 and MERRA-2 (and, to a lesser extent, ERA-Interim) strongly underestimate relative humidity during winter. ERA-5 captures the seasonal cycle of near-surface temperature best and shows the smallest bias relative to the observations. The other reanalyses show a general temperature underestimation during the winter months in the Antarctic interior and overestimation in the coastal areas. All reanalyses underestimate the mean near-surface winds in the interior (except MERRA-2) and along the coast during the entire year. The winds at the Antarctic Peninsula are overestimated by all reanalyses except MERRA-2. All models are able to capture snowfall patterns related to atmospheric rivers, with varying accuracy. Accumulation is best represented by ERA-5, although it underestimates observed surface mass balance and there is some variability in the accumulation over the different elevation classes, for all reanalyses. |
format |
Article in Journal/Newspaper |
author |
Gossart, A. Helsen, S. Lenaerts, J.T.M. Vanden Broucke, S. van Lipzig, N.P.M. Souverijns, N. |
spellingShingle |
Gossart, A. Helsen, S. Lenaerts, J.T.M. Vanden Broucke, S. van Lipzig, N.P.M. Souverijns, N. An evaluation of surface climatology in state-of-the-art reanalyses over the Antarctic Ice Sheet |
author_facet |
Gossart, A. Helsen, S. Lenaerts, J.T.M. Vanden Broucke, S. van Lipzig, N.P.M. Souverijns, N. |
author_sort |
Gossart, A. |
title |
An evaluation of surface climatology in state-of-the-art reanalyses over the Antarctic Ice Sheet |
title_short |
An evaluation of surface climatology in state-of-the-art reanalyses over the Antarctic Ice Sheet |
title_full |
An evaluation of surface climatology in state-of-the-art reanalyses over the Antarctic Ice Sheet |
title_fullStr |
An evaluation of surface climatology in state-of-the-art reanalyses over the Antarctic Ice Sheet |
title_full_unstemmed |
An evaluation of surface climatology in state-of-the-art reanalyses over the Antarctic Ice Sheet |
title_sort |
evaluation of surface climatology in state-of-the-art reanalyses over the antarctic ice sheet |
publishDate |
2019 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=322935 |
long_lat |
ENVELOPE(12.615,12.615,65.816,65.816) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Merra |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Merra |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Sheet |
op_source |
%3Ci%3EJ.+Clim.+32%2820%29%3C%2Fi%3E%3A+6899-6915.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1175%2FJCLI-D-19-0030.1%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1175%2FJCLI-D-19-0030.1%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000486261000002 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1175/JCLI-D-19-0030.1 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=322935 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1175/JCLI-D-19-0030.1 |
container_title |
Journal of Climate |
container_volume |
32 |
container_issue |
20 |
container_start_page |
6899 |
op_container_end_page |
6915 |
_version_ |
1766258740834598912 |