High-Resolution Numerical Modelling of Near-Surface Atmospheric Fields in the Complex Terrain of James Ross Island, Antarctic Peninsula
The Antarctic Peninsula belongs to the regions of the Earth that have seen the highest increase in air temperature in the past few decades. The warming is reflected in degradation of the cryospheric system. The impact of climate variability and interactions between the atmosphere and the cryosphere...
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ftmdpi:oai:mdpi.com:/2073-4433/12/3/360/ 2023-08-20T04:00:15+02:00 High-Resolution Numerical Modelling of Near-Surface Atmospheric Fields in the Complex Terrain of James Ross Island, Antarctic Peninsula Michael Matějka Kamil Láska Klára Jeklová Jiří Hošek agris 2021-03-09 application/pdf https://doi.org/10.3390/atmos12030360 EN eng Multidisciplinary Digital Publishing Institute Atmospheric Techniques, Instruments, and Modeling https://dx.doi.org/10.3390/atmos12030360 https://creativecommons.org/licenses/by/4.0/ Atmosphere; Volume 12; Issue 3; Pages: 360 air temperature simulation atmospheric model validation bare ground glacier polar meteorology Weather Research and Forecasting (WRF) model wind speed simulation Ulu Peninsula Text 2021 ftmdpi https://doi.org/10.3390/atmos12030360 2023-08-01T01:14:35Z The Antarctic Peninsula belongs to the regions of the Earth that have seen the highest increase in air temperature in the past few decades. The warming is reflected in degradation of the cryospheric system. The impact of climate variability and interactions between the atmosphere and the cryosphere can be studied using numerical atmospheric models. In this study, the standard version of the Weather Research and Forecasting (WRF) model was validated on James Ross Island in the northern part of the Antarctic Peninsula. The aim of this study was to verify the WRF model output at 700 m horizontal resolution using air temperature, wind speed and wind direction observations from automatic weather stations on the Ulu Peninsula, the northernmost part of James Ross Island. Validation was carried out for two contrasting periods (summer and winter) in 2019/2020 to assess possible seasonal effects on model accuracy. Simulated air temperatures were in very good agreement with measurements (mean bias −1.7 °C to 1.4 °C). The exception was a strong air temperature inversion during two of the winter days when a significant positive bias occurred at the coastal and lower-altitude locations on the Ulu Peninsula. Further analysis of the WRF estimates showed a good skill in simulating near-surface wind speed with higher correlation coefficients in winter (0.81–0.93) than in summer (0.41–0.59). However, bias and RMSE for wind speed tended to be better in summer. The performance of three WRF boundary layer schemes (MYJ, MYNN, QNSE) was further evaluated. The QNSE scheme was generally more accurate than MYNN and MYJ, but the differences were quite small and varied with time and place. The MYNN and QNSE schemes tended to achieve better wind speed simulation quality than the MYJ scheme. The model successfully captured wind direction, showing only slight differences to the observed values. It was shown that at lower altitudes the performance of the model can vary greatly with time. The model results were more accurate during high wind ... Text Antarc* Antarctic Antarctic Peninsula James Ross Island Ross Island MDPI Open Access Publishing Antarctic The Antarctic Antarctic Peninsula Ross Island Ulu Peninsula ENVELOPE(-57.963,-57.963,-63.918,-63.918) Atmosphere 12 3 360 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
air temperature simulation atmospheric model validation bare ground glacier polar meteorology Weather Research and Forecasting (WRF) model wind speed simulation Ulu Peninsula |
spellingShingle |
air temperature simulation atmospheric model validation bare ground glacier polar meteorology Weather Research and Forecasting (WRF) model wind speed simulation Ulu Peninsula Michael Matějka Kamil Láska Klára Jeklová Jiří Hošek High-Resolution Numerical Modelling of Near-Surface Atmospheric Fields in the Complex Terrain of James Ross Island, Antarctic Peninsula |
topic_facet |
air temperature simulation atmospheric model validation bare ground glacier polar meteorology Weather Research and Forecasting (WRF) model wind speed simulation Ulu Peninsula |
description |
The Antarctic Peninsula belongs to the regions of the Earth that have seen the highest increase in air temperature in the past few decades. The warming is reflected in degradation of the cryospheric system. The impact of climate variability and interactions between the atmosphere and the cryosphere can be studied using numerical atmospheric models. In this study, the standard version of the Weather Research and Forecasting (WRF) model was validated on James Ross Island in the northern part of the Antarctic Peninsula. The aim of this study was to verify the WRF model output at 700 m horizontal resolution using air temperature, wind speed and wind direction observations from automatic weather stations on the Ulu Peninsula, the northernmost part of James Ross Island. Validation was carried out for two contrasting periods (summer and winter) in 2019/2020 to assess possible seasonal effects on model accuracy. Simulated air temperatures were in very good agreement with measurements (mean bias −1.7 °C to 1.4 °C). The exception was a strong air temperature inversion during two of the winter days when a significant positive bias occurred at the coastal and lower-altitude locations on the Ulu Peninsula. Further analysis of the WRF estimates showed a good skill in simulating near-surface wind speed with higher correlation coefficients in winter (0.81–0.93) than in summer (0.41–0.59). However, bias and RMSE for wind speed tended to be better in summer. The performance of three WRF boundary layer schemes (MYJ, MYNN, QNSE) was further evaluated. The QNSE scheme was generally more accurate than MYNN and MYJ, but the differences were quite small and varied with time and place. The MYNN and QNSE schemes tended to achieve better wind speed simulation quality than the MYJ scheme. The model successfully captured wind direction, showing only slight differences to the observed values. It was shown that at lower altitudes the performance of the model can vary greatly with time. The model results were more accurate during high wind ... |
format |
Text |
author |
Michael Matějka Kamil Láska Klára Jeklová Jiří Hošek |
author_facet |
Michael Matějka Kamil Láska Klára Jeklová Jiří Hošek |
author_sort |
Michael Matějka |
title |
High-Resolution Numerical Modelling of Near-Surface Atmospheric Fields in the Complex Terrain of James Ross Island, Antarctic Peninsula |
title_short |
High-Resolution Numerical Modelling of Near-Surface Atmospheric Fields in the Complex Terrain of James Ross Island, Antarctic Peninsula |
title_full |
High-Resolution Numerical Modelling of Near-Surface Atmospheric Fields in the Complex Terrain of James Ross Island, Antarctic Peninsula |
title_fullStr |
High-Resolution Numerical Modelling of Near-Surface Atmospheric Fields in the Complex Terrain of James Ross Island, Antarctic Peninsula |
title_full_unstemmed |
High-Resolution Numerical Modelling of Near-Surface Atmospheric Fields in the Complex Terrain of James Ross Island, Antarctic Peninsula |
title_sort |
high-resolution numerical modelling of near-surface atmospheric fields in the complex terrain of james ross island, antarctic peninsula |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/atmos12030360 |
op_coverage |
agris |
long_lat |
ENVELOPE(-57.963,-57.963,-63.918,-63.918) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Ross Island Ulu Peninsula |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Ross Island Ulu Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula James Ross Island Ross Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula James Ross Island Ross Island |
op_source |
Atmosphere; Volume 12; Issue 3; Pages: 360 |
op_relation |
Atmospheric Techniques, Instruments, and Modeling https://dx.doi.org/10.3390/atmos12030360 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/atmos12030360 |
container_title |
Atmosphere |
container_volume |
12 |
container_issue |
3 |
container_start_page |
360 |
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1774717269027323904 |