nerc.ac.uk

The PolarRES dataset: a state-of-the-art regional climate model ensemble for understanding Antarctic climate [preprint]

Gilbert, Ella ORCID: https://orcid.org/0000-0001-5272-8894; Torres-Alavez, José Abraham; Hofsteenge, Marte G. ORCID: https://orcid.org/0000-0001-5369-5318; van de Berg, Willem Jan ORCID: https://orcid.org/0000-0002-8232-2040; Boberg, Fredrik; Christensen, Ole Bøssing ORCID: https://orcid.org/0000-0002-9513-2588; van Dalum, Christiaan Timo ORCID: https://orcid.org/0009-0008-6944-364X; Fettweis, Xavier ORCID: https://orcid.org/0000-0002-4140-3813; Gumber, Siddharth ORCID: https://orcid.org/0000-0002-1648-1537; Hansen, Nicolaj ORCID: https://orcid.org/0000-0002-4448-8891; Kittel, Christoph ORCID: https://orcid.org/0000-0001-6586-9784; Lambin, Clara; Maure, Damien; Mottram, Ruth ORCID: https://orcid.org/0000-0002-1016-1997; Olesen, Martin; Orr, Andrew ORCID: https://orcid.org/0000-0001-5111-8402; Phillips, Tony ORCID: https://orcid.org/0000-0002-3058-9157; van Tiggelen, Maurice ORCID: https://orcid.org/0000-0001-7898-3359; Verro, Kristiina ORCID: https://orcid.org/0000-0003-3312-3085; Mooney, Priscilla A. ORCID: https://orcid.org/0000-0001-5921-3105. 2025 The PolarRES dataset: a state-of-the-art regional climate model ensemble for understanding Antarctic climate [preprint]. The Cryopshere [in review]. 10.5194/egusphere-2025-4214

Full text not available from this repository. (Request a copy)

Abstract/Summary

Antarctica's weather and climate have global impacts, influencing weather patterns, ocean currents and sea levels worldwide. However, Antarctica is vast and complex, and the atmospheric processes that govern its climate are strongly influenced by its steep terrain, particularly around the coastal periphery. Our scientific understanding of this complex environment is hampered by the lack of reliable observations and gridded datasets at sufficiently high spatial and temporal resolution. High-resolution regional climate models, RCMs, can provide a solution to the sparsity of observational data and low resolution of reanalyses, facilitating more in-depth assessments of crucial climate variables like precipitation, winds and temperatures that are strongly influenced by topography. Here we present and evaluate a comprehensive, high-quality, ~ 11 km resolution RCM dataset: the PolarRES ensemble. We show that the ensemble largely out-performs ERA5, particularly for variables such as coastal winds and in characterising high-resolution regional precipitation patterns. There are no consistent seasonal differences in biases, but there are persistent regional biases. The Victoria Land region is the region the RCMs and ERA5 struggle the most with, which suggests that further investigation and model development is needed in this area. Each RCM has strengths and limitations, but overall the ensemble captures the observed weather and climate of Antarctica well. The PolarRES ensemble offers a novel and exciting way of evaluating climate processes and features, and we encourage researchers to use the data, which are freely available, to explore pertinent climate questions of local, regional and global significance.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.5194/egusphere-2025-4214
Date made live: 10 Oct 2025 15:03 +0 (UTC)
URI: https://nora.nerc.ac.uk/id/eprint/540379

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...