Evaluation of Vertical Profiles and Atmospheric Boundary Layer Structure Using the Regional Climate Model CCLM during MOSAiC

Regional climate models are a valuable tool for the study of the climate processes and climate change in polar regions, but the performance of the models has to be evaluated using experimental data. The regional climate model CCLM was used for simulations for the MOSAiC period with a horizontal reso...

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Bibliographic Details
Published in:Meteorology
Main Authors: Heinemann, Günther, Schefczyk, Lukas, Zentek, Rolf, Brooks, Ian M., Dahlke, Sandro, Walbröl, Andreas
Other Authors: The publication was funded by the Open Access Fund of Universität Trier and the German Research Foundation (DFG)
Format: Article in Journal/Newspaper
Language:English
Published: 2023
Subjects:
Arktis
4002924-4
Meereis
4131349-5
Klima
4031170-3
Modell
4039798-1
Atmosphärische Grenzschicht
4192517-8
Geowissenschaften
Geologie
ddc:55
Arctic
Arktis*
Climate change
Sea ice
Online Access:https://ubt.opus.hbz-nrw.de/frontdoor/index/index/docId/2100
https://nbn-resolving.org/urn:nbn:de:hbz:385-1-21004
https://doi.org/10.3390/meteorology2020016
https://ubt.opus.hbz-nrw.de/files/2100/meteorology-02-00016.pdf
Description
Summary:Regional climate models are a valuable tool for the study of the climate processes and climate change in polar regions, but the performance of the models has to be evaluated using experimental data. The regional climate model CCLM was used for simulations for the MOSAiC period with a horizontal resolution of 14 km (whole Arctic). CCLM was used in a forecast mode (nested in ERA5) and used a thermodynamic sea ice model. Sea ice concentration was taken from AMSR2 data (C15 run) and from a high-resolution data set (1 km) derived from MODIS data (C15MOD0 run). The model was evaluated using radiosonde data and data of different profiling systems with a focus on the winter period (November–April). The comparison with radiosonde data showed very good agreement for temperature, humidity, and wind. A cold bias was present in the ABL for November and December, which was smaller for the C15MOD0 run. In contrast, there was a warm bias for lower levels in March and April, which was smaller for the C15 run. The effects of different sea ice parameterizations were limited to heights below 300 m. High-resolution lidar and radar wind profiles as well as temperature and integrated water vapor (IWV) data from microwave radiometers were used for the comparison with CCLM for case studies, which included low-level jets. LIDAR wind profiles have many gaps, but represent a valuable data set for model evaluation. Comparisons with IWV and temperature data of microwave radiometers show very good agreement.

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