The storm tracks and the energy cycle of the Southern Hemisphere: Sensitivity to sea-ice boundary conditions
The effect of sea-ice on various aspects of the Southern Hemisphere (SH) extratropical climate is examined. Two simulations using the LMD GCM are performed: a control run with the observed sea-ice distribution and an anomaly run in which all SH sea-ice is replaced by open ocean. When sea-ice is remo...
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ftunibueairesbd:todo:paper_09927689_v17_n11_p1478_Menendez 2023-10-29T02:31:54+01:00 The storm tracks and the energy cycle of the Southern Hemisphere: Sensitivity to sea-ice boundary conditions Menéndez, C.G. Serafini, V. Le Treut, H. https://hdl.handle.net/20.500.12110/paper_09927689_v17_n11_p1478_Menendez unknown http://hdl.handle.net/20.500.12110/paper_09927689_v17_n11_p1478_Menendez info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Air-sea interactions Meteorology and atmospheric dynamics (climatology ocean-atmosphere interactions) JOUR ftunibueairesbd https://doi.org/20.500.12110/paper_09927689_v17_n11_p1478_Menendez 2023-10-05T01:46:27Z The effect of sea-ice on various aspects of the Southern Hemisphere (SH) extratropical climate is examined. Two simulations using the LMD GCM are performed: a control run with the observed sea-ice distribution and an anomaly run in which all SH sea-ice is replaced by open ocean. When sea-ice is removed, the mean sea level pressure displays anomalies predominantly negatives near the Antarctic coast. In general, the meridional temperature gradient is reduced over most of the Southern Ocean, the polar jet is weaker and the sea level pressure rises equatorward of the control ice edge. The high frequency filtered standard deviation of both the sea level pressure and the 300-hPa geopotential height decreases over the southern Pacific and southwestern Atlantic oceans, especially to the north of the ice edge (as prescribed in the control). In contrast, over the Indian Ocean the perturbed simulation exhibits less variability equatorward of about 50°S and increased variability to the south. The zonal averages of the zonal and eddy potential and kinetic energies were evaluated. The effect of removing sea-ice is to diminish the available potential energy of the mean zonal flow, the available potential energy of the perturbations, the kinetic energy of the growing disturbances and the kinetic energy of the mean zonal flow over most of the Southern Ocean. The zonally averaged intensity of the subpolar trough and the rate of the baroclinic energy conversions are also weaker. Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
institution |
Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
op_collection_id |
ftunibueairesbd |
language |
unknown |
topic |
Air-sea interactions Meteorology and atmospheric dynamics (climatology ocean-atmosphere interactions) |
spellingShingle |
Air-sea interactions Meteorology and atmospheric dynamics (climatology ocean-atmosphere interactions) Menéndez, C.G. Serafini, V. Le Treut, H. The storm tracks and the energy cycle of the Southern Hemisphere: Sensitivity to sea-ice boundary conditions |
topic_facet |
Air-sea interactions Meteorology and atmospheric dynamics (climatology ocean-atmosphere interactions) |
description |
The effect of sea-ice on various aspects of the Southern Hemisphere (SH) extratropical climate is examined. Two simulations using the LMD GCM are performed: a control run with the observed sea-ice distribution and an anomaly run in which all SH sea-ice is replaced by open ocean. When sea-ice is removed, the mean sea level pressure displays anomalies predominantly negatives near the Antarctic coast. In general, the meridional temperature gradient is reduced over most of the Southern Ocean, the polar jet is weaker and the sea level pressure rises equatorward of the control ice edge. The high frequency filtered standard deviation of both the sea level pressure and the 300-hPa geopotential height decreases over the southern Pacific and southwestern Atlantic oceans, especially to the north of the ice edge (as prescribed in the control). In contrast, over the Indian Ocean the perturbed simulation exhibits less variability equatorward of about 50°S and increased variability to the south. The zonal averages of the zonal and eddy potential and kinetic energies were evaluated. The effect of removing sea-ice is to diminish the available potential energy of the mean zonal flow, the available potential energy of the perturbations, the kinetic energy of the growing disturbances and the kinetic energy of the mean zonal flow over most of the Southern Ocean. The zonally averaged intensity of the subpolar trough and the rate of the baroclinic energy conversions are also weaker. |
format |
Journal/Newspaper |
author |
Menéndez, C.G. Serafini, V. Le Treut, H. |
author_facet |
Menéndez, C.G. Serafini, V. Le Treut, H. |
author_sort |
Menéndez, C.G. |
title |
The storm tracks and the energy cycle of the Southern Hemisphere: Sensitivity to sea-ice boundary conditions |
title_short |
The storm tracks and the energy cycle of the Southern Hemisphere: Sensitivity to sea-ice boundary conditions |
title_full |
The storm tracks and the energy cycle of the Southern Hemisphere: Sensitivity to sea-ice boundary conditions |
title_fullStr |
The storm tracks and the energy cycle of the Southern Hemisphere: Sensitivity to sea-ice boundary conditions |
title_full_unstemmed |
The storm tracks and the energy cycle of the Southern Hemisphere: Sensitivity to sea-ice boundary conditions |
title_sort |
storm tracks and the energy cycle of the southern hemisphere: sensitivity to sea-ice boundary conditions |
url |
https://hdl.handle.net/20.500.12110/paper_09927689_v17_n11_p1478_Menendez |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_relation |
http://hdl.handle.net/20.500.12110/paper_09927689_v17_n11_p1478_Menendez |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar |
op_doi |
https://doi.org/20.500.12110/paper_09927689_v17_n11_p1478_Menendez |
_version_ |
1781052784406167552 |