A validation of ERA5 reanalysis data in the southern Antarctic Peninsula – Ellsworth Land region, and its implications for ice core studies

Tetzner, Dieter ORCID: https://orcid.org/0000-0001-7659-8799; Thomas, Liz ORCID: https://orcid.org/0000-0002-3010-6493; Allen, Claire ORCID: https://orcid.org/0000-0002-0938-0551. 2019 A validation of ERA5 reanalysis data in the southern Antarctic Peninsula – Ellsworth Land region, and its implications for ice core studies. Geosciences, 9 (7), 289. https://doi.org/10.3390/geosciences9070289

Before downloading, please read NORA policies.

Preview

Text (Open Access)
© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
geosciences-09-00289.pdf - Published Version
Available under License Creative Commons Attribution 4.0.
Download (3MB) | Preview

Official URL: https://www.mdpi.com/2076-3263/9/7/289

Abstract/Summary

Climate reanalyses provide key information to calibrate proxy records in regions with scarce direct observations. The climate reanalysis used to perform a proxy calibration should accurately reproduce the local climate variability. Here we present a regional scale evaluation of meteorological parameters using ERA-Interim and ERA5 reanalyses compared to in-situ observations from 13 automatic weather stations (AWS), located in the southern Antarctic Peninsula and Ellsworth Land, Antarctica. Both reanalyses seem to perform better in the escarpment area (>1000 m a.s.l) than on the coast. A significant improvement is observed in the performance of ERA5 over ERA-Interim. ERA5 is highly accurate, representing the magnitude and variability of near-surface air temperature and wind regimes. The higher spatial and temporal resolution provided by ERA5 reduces significantly the cold coastal biases identified in ERA-Interim and increases the accuracy representing the wind direction and wind speed in the escarpment. The slight underestimation in the wind speed obtained from the reanalyses could be attributed to an interplay of topographic factors and the effect of local wind regimes. Three sites in this region are highlighted for their potential for ice core studies. These sites are likely to provide accurate proxy calibrations for future palaeoclimatic reconstructions.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.3390/geosciences9070289
Additional Keywords:	climate reanalysis; ERA5; ERA-Interim; Antarctic Peninsula; ice cores; Antarctica; winds
Date made live:	08 Jul 2019 14:15 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/523367

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.3390/geosciences9070289

Additional Keywords:

climate reanalysis; ERA5; ERA-Interim; Antarctic Peninsula; ice cores; Antarctica; winds

Date made live:

08 Jul 2019 14:15 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/523367