Impacts of wind profile shear and curvature on the parameterized orographic gravity wave stress in the Weather Research and Forecasting model
The parameterization of orographic gravity wave drag (OGWD) in the Weather Research and Forecasting model is extended by including the second‐order Wentzel‐Kramers‐Brillouin (WKB) corrections to the surface wave momentum flux (SWMF) caused by wind profile shear (WSHR) and curvature (WCUR) effects. S...
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ftunivreading:oai:centaur.reading.ac.uk:90778 2024-06-23T07:47:39+00:00 Impacts of wind profile shear and curvature on the parameterized orographic gravity wave stress in the Weather Research and Forecasting model Xu, Xin Teixeira, Miguel A. C. Xue, Ming Lu, Yixiong Tang, Jianping 2020-11-09 text https://centaur.reading.ac.uk/90778/ https://centaur.reading.ac.uk/90778/1/qj.3828.pdf en eng Royal Meteorological Society https://centaur.reading.ac.uk/90778/1/qj.3828.pdf Xu, X., Teixeira, M. A. C. <https://centaur.reading.ac.uk/view/creators/90004822.html> orcid:0000-0003-1205-3233 , Xue, M., Lu, Y. and Tang, J. (2020) Impacts of wind profile shear and curvature on the parameterized orographic gravity wave stress in the Weather Research and Forecasting model. Quarterly Journal of the Royal Meteorological Society, 146 (732). pp. 3086-3100. ISSN 1477-870X doi: https://doi.org/10.1002/qj.3828 <https://doi.org/10.1002/qj.3828> Article PeerReviewed 2020 ftunivreading https://doi.org/10.1002/qj.3828 2024-06-11T15:10:14Z The parameterization of orographic gravity wave drag (OGWD) in the Weather Research and Forecasting model is extended by including the second‐order Wentzel‐Kramers‐Brillouin (WKB) corrections to the surface wave momentum flux (SWMF) caused by wind profile shear (WSHR) and curvature (WCUR) effects. Simulations of the atmospheric circulation are performed to study the behavior and impact of WKB corrections. In January, the SWMF is weakened in the Northern Hemisphere (NH) midlatitudes by the WSHR term while WCUR acts to enhance the SWMF over Antarctica. In July, the WSHR corrections are similar to those in January whereas the WCUR term produces corrections of opposite sign in the high latitudes of each hemisphere. The latter is attributed to the increase of near‐surface winds in the cold season which reverses the low‐level wind profile curvature. The seasonal reversal of the WCUR term contradicts previous findings obtained from offline evaluation using reanalysis datasets. This may be due to the different OGWD parameterization schemes used, or suggest a sensitivity to the height where the wind profiles effects are evaluated. Changes in the SWMF can affect the vertical distribution of parameterized OGWD. In January, the OGWD in the NH midlatitudes is decreased in the lower troposphere but increased in the upper troposphere. This is because a reduced SWMF inhibits wave breaking in the lower troposphere. Therefore, more WMF is transported to the upper troposphere which enhances wave breaking there. The increased upper‐tropospheric wave breaking in turn decreases the WMF propagating into the stratosphere where the OGWD is reduced. In July, the reduction of SWMF over Antarctica is more notable than that in the NH midlatitudes in January. Consequently, the OGWD is weakened in the upper troposphere over Antarctica. Article in Journal/Newspaper Antarc* Antarctica CentAUR: Central Archive at the University of Reading Quarterly Journal of the Royal Meteorological Society 146 732 3086 3100 |
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Open Polar |
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CentAUR: Central Archive at the University of Reading |
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ftunivreading |
language |
English |
description |
The parameterization of orographic gravity wave drag (OGWD) in the Weather Research and Forecasting model is extended by including the second‐order Wentzel‐Kramers‐Brillouin (WKB) corrections to the surface wave momentum flux (SWMF) caused by wind profile shear (WSHR) and curvature (WCUR) effects. Simulations of the atmospheric circulation are performed to study the behavior and impact of WKB corrections. In January, the SWMF is weakened in the Northern Hemisphere (NH) midlatitudes by the WSHR term while WCUR acts to enhance the SWMF over Antarctica. In July, the WSHR corrections are similar to those in January whereas the WCUR term produces corrections of opposite sign in the high latitudes of each hemisphere. The latter is attributed to the increase of near‐surface winds in the cold season which reverses the low‐level wind profile curvature. The seasonal reversal of the WCUR term contradicts previous findings obtained from offline evaluation using reanalysis datasets. This may be due to the different OGWD parameterization schemes used, or suggest a sensitivity to the height where the wind profiles effects are evaluated. Changes in the SWMF can affect the vertical distribution of parameterized OGWD. In January, the OGWD in the NH midlatitudes is decreased in the lower troposphere but increased in the upper troposphere. This is because a reduced SWMF inhibits wave breaking in the lower troposphere. Therefore, more WMF is transported to the upper troposphere which enhances wave breaking there. The increased upper‐tropospheric wave breaking in turn decreases the WMF propagating into the stratosphere where the OGWD is reduced. In July, the reduction of SWMF over Antarctica is more notable than that in the NH midlatitudes in January. Consequently, the OGWD is weakened in the upper troposphere over Antarctica. |
format |
Article in Journal/Newspaper |
author |
Xu, Xin Teixeira, Miguel A. C. Xue, Ming Lu, Yixiong Tang, Jianping |
spellingShingle |
Xu, Xin Teixeira, Miguel A. C. Xue, Ming Lu, Yixiong Tang, Jianping Impacts of wind profile shear and curvature on the parameterized orographic gravity wave stress in the Weather Research and Forecasting model |
author_facet |
Xu, Xin Teixeira, Miguel A. C. Xue, Ming Lu, Yixiong Tang, Jianping |
author_sort |
Xu, Xin |
title |
Impacts of wind profile shear and curvature on the parameterized orographic gravity wave stress in the Weather Research and Forecasting model |
title_short |
Impacts of wind profile shear and curvature on the parameterized orographic gravity wave stress in the Weather Research and Forecasting model |
title_full |
Impacts of wind profile shear and curvature on the parameterized orographic gravity wave stress in the Weather Research and Forecasting model |
title_fullStr |
Impacts of wind profile shear and curvature on the parameterized orographic gravity wave stress in the Weather Research and Forecasting model |
title_full_unstemmed |
Impacts of wind profile shear and curvature on the parameterized orographic gravity wave stress in the Weather Research and Forecasting model |
title_sort |
impacts of wind profile shear and curvature on the parameterized orographic gravity wave stress in the weather research and forecasting model |
publisher |
Royal Meteorological Society |
publishDate |
2020 |
url |
https://centaur.reading.ac.uk/90778/ https://centaur.reading.ac.uk/90778/1/qj.3828.pdf |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://centaur.reading.ac.uk/90778/1/qj.3828.pdf Xu, X., Teixeira, M. A. C. <https://centaur.reading.ac.uk/view/creators/90004822.html> orcid:0000-0003-1205-3233 , Xue, M., Lu, Y. and Tang, J. (2020) Impacts of wind profile shear and curvature on the parameterized orographic gravity wave stress in the Weather Research and Forecasting model. Quarterly Journal of the Royal Meteorological Society, 146 (732). pp. 3086-3100. ISSN 1477-870X doi: https://doi.org/10.1002/qj.3828 <https://doi.org/10.1002/qj.3828> |
op_doi |
https://doi.org/10.1002/qj.3828 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
146 |
container_issue |
732 |
container_start_page |
3086 |
op_container_end_page |
3100 |
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1802651794966315008 |