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Discussion papers
https://doi.org/10.5194/tc-2019-96
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-2019-96
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: brief communication 20 May 2019

Submitted as: brief communication | 20 May 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal The Cryosphere (TC).

Brief communication: Interest of a regional climate model against ERA5 to simulate the near-surface climate of the Greenland ice sheet

Alison Delhasse1, Christoph Kittel1, Charles Amory1, Stefan Hofer1,2, and Xavier Fettweis1 Alison Delhasse et al.
  • 1Laboratory of Climatology, Department of Geography, SPHERES, University of Liège, Liège, Belgium
  • 2School of Geographical Sciences, University of Bristol, Bristol, UK

Abstract. The ERA5 reanalysis, recently made available by the European Centre for Medium-Range Weather Forecasts (ECMWF), is a new reanalysis product at a higher resolution which will replace ERA-Interim, considered to be the best reanalysis over Greenland until now. However, so far very little is known about the performance of ERA5 when compared to ERA-Interim over the Greenland Ice Sheet (GrIS). This study shows (1) that ERA5 improves not significantly the ERA-Interim comparison with near-surface climate observations over GrIS, (2) polar regional climate models (e.g. MAR) are still a useful tool to study the GrIS climate compared to ERA5, in particular in summer, and (3) that MAR results are not sensitive to the forcing used at its lateral boundaries (ERA5 or ERA-Interim).

Alison Delhasse et al.
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Status: open (extended)
Status: open (extended)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Alison Delhasse et al.
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Short summary
The ERA5 reanalysis of the ECMWF will replace the former one ERA-Interim from August 2019 and has never been evaluated over Greenland. The aim was to evaluate the performance of ERA5 to simulate the near-surface climate of the Greenland Ice sheet (GrIS) against ERA-Interim and regional climate models with the help of in-situ observations from the PROMICE dataset. We also highlighted that polar regional climate models are still a useful tool to study the GrIS climate compared to ERA5.
The ERA5 reanalysis of the ECMWF will replace the former one ERA-Interim from August 2019 and...
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