Preprints
https://doi.org/10.5194/tc-2023-44
https://doi.org/10.5194/tc-2023-44
10 Mar 2023
 | 10 Mar 2023
Status: a revised version of this preprint was accepted for the journal TC and is expected to appear here in due course.

Brief communication: Significant cold bias in ERA5 output for McMurdo region, Antarctica

Ricardo Garza-Giron and Slawek M. Tulaczyk

Abstract. The ERA5 climate reanalysis dataset plays an important role in applications such as monitoring and modelling climate system changes in polar regions, so the calibration of the reanalysis to ground observations is of great relevance. Here, we compare the 2-meter air temperature time series of the ERA5 reanalysis to the near-ground air temperature measured in 17 Automatic Weather Stations in the McMurdo Sound, Antarctica. We find that the reanalysis data has a systematic cold bias of ~5 °C. Our results show that future work should rely on secondary observations to calibrate when using the ERA5 reanalysis in polar regions.

Ricardo Garza-Giron and Slawek M. Tulaczyk

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on tc-2023-44', Anonymous Referee #1, 31 Mar 2023
    • AC1: 'Reply on RC1', Ricardo Garza-Giron, 12 Jul 2023
  • RC2: 'Comment on tc-2023-44', Anonymous Referee #2, 08 Apr 2023
    • AC2: 'Reply on RC2', Ricardo Garza-Giron, 12 Jul 2023

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on tc-2023-44', Anonymous Referee #1, 31 Mar 2023
    • AC1: 'Reply on RC1', Ricardo Garza-Giron, 12 Jul 2023
  • RC2: 'Comment on tc-2023-44', Anonymous Referee #2, 08 Apr 2023
    • AC2: 'Reply on RC2', Ricardo Garza-Giron, 12 Jul 2023
Ricardo Garza-Giron and Slawek M. Tulaczyk
Ricardo Garza-Giron and Slawek M. Tulaczyk

Viewed

Total article views: 469 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
295 153 21 469 63 10 16
  • HTML: 295
  • PDF: 153
  • XML: 21
  • Total: 469
  • Supplement: 63
  • BibTeX: 10
  • EndNote: 16
Views and downloads (calculated since 10 Mar 2023)
Cumulative views and downloads (calculated since 10 Mar 2023)

Viewed (geographical distribution)

Total article views: 458 (including HTML, PDF, and XML) Thereof 458 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 22 Jan 2024
Download
Short summary
By analyzing temperature time series over more than 20 years, we have found a discrepancy between the 2-meter temperature values reported by the ERA5 reanalysis and the Automatic Weather Stations in the McMurdo Sound, Antarctica. The ERA5 reanalysis temperatures are systematically colder by ~5 °C.