WRF Hindcasts of Cold Front Passages over the ARM Eastern North Atlantic Site: A Sensitivity Study
The present study explores the ability of the Weather Research and Forecasting (WRF) Model to accurately reproduce the passage of extratropical cold fronts at the DOE ARM eastern North Atlantic (ENA) observation site on the Azores. An analysis of three case studies is performed in which the impact o...
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ftosti:oai:osti.gov:1594063 2023-07-30T04:05:20+02:00 WRF Hindcasts of Cold Front Passages over the ARM Eastern North Atlantic Site: A Sensitivity Study Lamraoui, Fayçal Booth, James F. Naud, Catherine M. 2021-08-02 application/pdf http://www.osti.gov/servlets/purl/1594063 https://www.osti.gov/biblio/1594063 https://doi.org/10.1175/MWR-D-17-0281.1 unknown http://www.osti.gov/servlets/purl/1594063 https://www.osti.gov/biblio/1594063 https://doi.org/10.1175/MWR-D-17-0281.1 doi:10.1175/MWR-D-17-0281.1 58 GEOSCIENCES 2021 ftosti https://doi.org/10.1175/MWR-D-17-0281.1 2023-07-11T09:39:14Z The present study explores the ability of the Weather Research and Forecasting (WRF) Model to accurately reproduce the passage of extratropical cold fronts at the DOE ARM eastern North Atlantic (ENA) observation site on the Azores. An analysis of three case studies is performed in which the impact of the WRF domain size, position of the model boundary relative to the ENA site, grid spacing, and spectral nudging conditions are explored. The results from these case studies indicate that model biases in the timing and duration of cold front passages change with the distance between the model domain boundary and the ENA site. For these three cases, if the western model boundary is farther than 1500 km from the site, the front becomes too meridional and fails to reach the site, making 1000 or 1500 km the optimal distances. In contrast, integrations with small distances (e.g., 500 km) between the site and domain boundaries have inadequate spatial spinup (i.e., the domain is too small for the model to properly stabilize). For all three cases, regardless of domain size, the model has biases in its upper-level circulation that impact the position and timing of the front. However, this issue is most serious for 4000-km 2 domains and larger. For these domains, prolonged spectral nudging can correct cold front biases. As such, this analysis provides a framework to optimize the WRF Model configuration necessary for a realistic hindcast of a cold front passage at a fixed location centered in a domain as large as computationally possible. Other/Unknown Material North Atlantic SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Monthly Weather Review 146 8 2417 2432 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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58 GEOSCIENCES |
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58 GEOSCIENCES Lamraoui, Fayçal Booth, James F. Naud, Catherine M. WRF Hindcasts of Cold Front Passages over the ARM Eastern North Atlantic Site: A Sensitivity Study |
topic_facet |
58 GEOSCIENCES |
description |
The present study explores the ability of the Weather Research and Forecasting (WRF) Model to accurately reproduce the passage of extratropical cold fronts at the DOE ARM eastern North Atlantic (ENA) observation site on the Azores. An analysis of three case studies is performed in which the impact of the WRF domain size, position of the model boundary relative to the ENA site, grid spacing, and spectral nudging conditions are explored. The results from these case studies indicate that model biases in the timing and duration of cold front passages change with the distance between the model domain boundary and the ENA site. For these three cases, if the western model boundary is farther than 1500 km from the site, the front becomes too meridional and fails to reach the site, making 1000 or 1500 km the optimal distances. In contrast, integrations with small distances (e.g., 500 km) between the site and domain boundaries have inadequate spatial spinup (i.e., the domain is too small for the model to properly stabilize). For all three cases, regardless of domain size, the model has biases in its upper-level circulation that impact the position and timing of the front. However, this issue is most serious for 4000-km 2 domains and larger. For these domains, prolonged spectral nudging can correct cold front biases. As such, this analysis provides a framework to optimize the WRF Model configuration necessary for a realistic hindcast of a cold front passage at a fixed location centered in a domain as large as computationally possible. |
author |
Lamraoui, Fayçal Booth, James F. Naud, Catherine M. |
author_facet |
Lamraoui, Fayçal Booth, James F. Naud, Catherine M. |
author_sort |
Lamraoui, Fayçal |
title |
WRF Hindcasts of Cold Front Passages over the ARM Eastern North Atlantic Site: A Sensitivity Study |
title_short |
WRF Hindcasts of Cold Front Passages over the ARM Eastern North Atlantic Site: A Sensitivity Study |
title_full |
WRF Hindcasts of Cold Front Passages over the ARM Eastern North Atlantic Site: A Sensitivity Study |
title_fullStr |
WRF Hindcasts of Cold Front Passages over the ARM Eastern North Atlantic Site: A Sensitivity Study |
title_full_unstemmed |
WRF Hindcasts of Cold Front Passages over the ARM Eastern North Atlantic Site: A Sensitivity Study |
title_sort |
wrf hindcasts of cold front passages over the arm eastern north atlantic site: a sensitivity study |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/1594063 https://www.osti.gov/biblio/1594063 https://doi.org/10.1175/MWR-D-17-0281.1 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://www.osti.gov/servlets/purl/1594063 https://www.osti.gov/biblio/1594063 https://doi.org/10.1175/MWR-D-17-0281.1 doi:10.1175/MWR-D-17-0281.1 |
op_doi |
https://doi.org/10.1175/MWR-D-17-0281.1 |
container_title |
Monthly Weather Review |
container_volume |
146 |
container_issue |
8 |
container_start_page |
2417 |
op_container_end_page |
2432 |
_version_ |
1772817170959433728 |