Sensitivity of mountain wave drag estimates on separation methods and proposed improvements
Internal gravity waves (GWs) are ubiquitous in the atmosphere, making significant contributions to the mesoscale motions. Since the majority of their spectrum is unresolved in global circulation models, their effects need to be parameterized. In recent decades GWs have been increasingly studied in h...
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ftfzjuelichnvdb:oai:juser.fz-juelich.de:1006588 2023-10-29T02:35:59+01:00 Sensitivity of mountain wave drag estimates on separation methods and proposed improvements Procházková, Zuzana Kruse, Christopher G. Geldenhuys, Markus Preusse, Peter Šácha, Petr Alexander, M. Joan Hoffmann, Lars Bacmeister, Julio T. Holt, Laura Wright, Corwin Sato, Kaoru Gisinger, Sonja Ern, Manfred DE 2023 https://juser.fz-juelich.de/record/1006588 https://juser.fz-juelich.de/search?p=id:%22FZJ-2023-01729%22 eng eng American Meteorological Soc. info:eu-repo/semantics/altIdentifier/hdl/2128/34591 info:eu-repo/semantics/altIdentifier/issn/2163-5374 info:eu-repo/semantics/altIdentifier/doi/10.1175/JAS-D-22-0151.1 info:eu-repo/semantics/altIdentifier/issn/0022-4928 info:eu-repo/semantics/altIdentifier/wos/WOS:001022833400001 info:eu-repo/semantics/altIdentifier/issn/0095-9634 info:eu-repo/semantics/altIdentifier/issn/1520-0469 https://juser.fz-juelich.de/record/1006588 https://juser.fz-juelich.de/search?p=id:%22FZJ-2023-01729%22 info:eu-repo/semantics/openAccess Journal of the atmospheric sciences 80(7), 1661–1680 (2023). doi:10.1175/JAS-D-22-0151.1 info:eu-repo/classification/ddc/550 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2023 ftfzjuelichnvdb https://doi.org/10.1175/JAS-D-22-0151.1 2023-10-01T22:17:58Z Internal gravity waves (GWs) are ubiquitous in the atmosphere, making significant contributions to the mesoscale motions. Since the majority of their spectrum is unresolved in global circulation models, their effects need to be parameterized. In recent decades GWs have been increasingly studied in high-resolution simulations, which, unlike direct observations, allow us to explore full spatiotemporal variations of the resolved wave field. In our study we analyze and refine a traditional method for GW analysis in a high-resolution simulation on a regional domain around the Drake Passage. We show that GW momentum drag estimates based on the Gaussian high-pass filter method applied to separate GW perturbations from the background are sensitive to the choice of a cutoff parameter. The impact of the cutoff parameter is higher for horizontal fluxes of horizontal momentum, which indicates higher sensitivity for horizontally propagating waves. Two modified methods, which choose the parameter value from spectral information, are proposed. The dynamically determined cutoff is mostly higher than the traditional cutoff values around 500 km, leading to larger GW fluxes and drag, and varies with time and altitude. The differences between the traditional and the modified methods are especially pronounced during events with significant drag contributions from horizontal momentum fluxes Article in Journal/Newspaper Drake Passage Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources) Journal of the Atmospheric Sciences 80 7 1661 1680 |
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Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources) |
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English |
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info:eu-repo/classification/ddc/550 |
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info:eu-repo/classification/ddc/550 Procházková, Zuzana Kruse, Christopher G. Geldenhuys, Markus Preusse, Peter Šácha, Petr Alexander, M. Joan Hoffmann, Lars Bacmeister, Julio T. Holt, Laura Wright, Corwin Sato, Kaoru Gisinger, Sonja Ern, Manfred Sensitivity of mountain wave drag estimates on separation methods and proposed improvements |
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info:eu-repo/classification/ddc/550 |
description |
Internal gravity waves (GWs) are ubiquitous in the atmosphere, making significant contributions to the mesoscale motions. Since the majority of their spectrum is unresolved in global circulation models, their effects need to be parameterized. In recent decades GWs have been increasingly studied in high-resolution simulations, which, unlike direct observations, allow us to explore full spatiotemporal variations of the resolved wave field. In our study we analyze and refine a traditional method for GW analysis in a high-resolution simulation on a regional domain around the Drake Passage. We show that GW momentum drag estimates based on the Gaussian high-pass filter method applied to separate GW perturbations from the background are sensitive to the choice of a cutoff parameter. The impact of the cutoff parameter is higher for horizontal fluxes of horizontal momentum, which indicates higher sensitivity for horizontally propagating waves. Two modified methods, which choose the parameter value from spectral information, are proposed. The dynamically determined cutoff is mostly higher than the traditional cutoff values around 500 km, leading to larger GW fluxes and drag, and varies with time and altitude. The differences between the traditional and the modified methods are especially pronounced during events with significant drag contributions from horizontal momentum fluxes |
format |
Article in Journal/Newspaper |
author |
Procházková, Zuzana Kruse, Christopher G. Geldenhuys, Markus Preusse, Peter Šácha, Petr Alexander, M. Joan Hoffmann, Lars Bacmeister, Julio T. Holt, Laura Wright, Corwin Sato, Kaoru Gisinger, Sonja Ern, Manfred |
author_facet |
Procházková, Zuzana Kruse, Christopher G. Geldenhuys, Markus Preusse, Peter Šácha, Petr Alexander, M. Joan Hoffmann, Lars Bacmeister, Julio T. Holt, Laura Wright, Corwin Sato, Kaoru Gisinger, Sonja Ern, Manfred |
author_sort |
Procházková, Zuzana |
title |
Sensitivity of mountain wave drag estimates on separation methods and proposed improvements |
title_short |
Sensitivity of mountain wave drag estimates on separation methods and proposed improvements |
title_full |
Sensitivity of mountain wave drag estimates on separation methods and proposed improvements |
title_fullStr |
Sensitivity of mountain wave drag estimates on separation methods and proposed improvements |
title_full_unstemmed |
Sensitivity of mountain wave drag estimates on separation methods and proposed improvements |
title_sort |
sensitivity of mountain wave drag estimates on separation methods and proposed improvements |
publisher |
American Meteorological Soc. |
publishDate |
2023 |
url |
https://juser.fz-juelich.de/record/1006588 https://juser.fz-juelich.de/search?p=id:%22FZJ-2023-01729%22 |
op_coverage |
DE |
genre |
Drake Passage |
genre_facet |
Drake Passage |
op_source |
Journal of the atmospheric sciences 80(7), 1661–1680 (2023). doi:10.1175/JAS-D-22-0151.1 |
op_relation |
info:eu-repo/semantics/altIdentifier/hdl/2128/34591 info:eu-repo/semantics/altIdentifier/issn/2163-5374 info:eu-repo/semantics/altIdentifier/doi/10.1175/JAS-D-22-0151.1 info:eu-repo/semantics/altIdentifier/issn/0022-4928 info:eu-repo/semantics/altIdentifier/wos/WOS:001022833400001 info:eu-repo/semantics/altIdentifier/issn/0095-9634 info:eu-repo/semantics/altIdentifier/issn/1520-0469 https://juser.fz-juelich.de/record/1006588 https://juser.fz-juelich.de/search?p=id:%22FZJ-2023-01729%22 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1175/JAS-D-22-0151.1 |
container_title |
Journal of the Atmospheric Sciences |
container_volume |
80 |
container_issue |
7 |
container_start_page |
1661 |
op_container_end_page |
1680 |
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1781059520880967680 |