Orographic Flow Influence on Precipitation During an Atmospheric River Event at Davis, Antarctica
International audience Intense snowfall sublimation was observed during a precipitation event over Davis in the Vestfold Hills, East Antarctica, from 08 to 10 January 2019. Radar observations and simulations from the Weather Research and Forecasting model revealed that orographic gravity waves (OGWs...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | https://hal.sorbonne-universite.fr/hal-03574447 https://hal.sorbonne-universite.fr/hal-03574447/document https://hal.sorbonne-universite.fr/hal-03574447/file/JGR%20Atmospheres%20-%202022%20-%20Gehring%20-%20Orographic%20Flow%20Influence%20on%20Precipitation%20During%20an%20Atmospheric%20River%20Event%20at%20Davis%20.pdf https://doi.org/10.1029/2021JD035210 |
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ftinsu:oai:HAL:hal-03574447v1 2023-11-05T03:32:56+01:00 Orographic Flow Influence on Precipitation During an Atmospheric River Event at Davis, Antarctica Gehring, Josué Vignon, Étienne Billault‐roux, Anne‐claire Ferrone, Alfonso Protat, Alain Alexander, Simon, P Berne, Alexis Environmental Remote Sensing Laboratory Lausanne Ecole Polytechnique Fédérale de Lausanne (EPFL) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) Australian Bureau of Meteorology Melbourne (BoM) Australian Government Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia Australian Antarctic Division (AAD) Australian Government, Department of the Environment and Energy 2022-01-27 https://hal.sorbonne-universite.fr/hal-03574447 https://hal.sorbonne-universite.fr/hal-03574447/document https://hal.sorbonne-universite.fr/hal-03574447/file/JGR%20Atmospheres%20-%202022%20-%20Gehring%20-%20Orographic%20Flow%20Influence%20on%20Precipitation%20During%20an%20Atmospheric%20River%20Event%20at%20Davis%20.pdf https://doi.org/10.1029/2021JD035210 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2021JD035210 hal-03574447 https://hal.sorbonne-universite.fr/hal-03574447 https://hal.sorbonne-universite.fr/hal-03574447/document https://hal.sorbonne-universite.fr/hal-03574447/file/JGR%20Atmospheres%20-%202022%20-%20Gehring%20-%20Orographic%20Flow%20Influence%20on%20Precipitation%20During%20an%20Atmospheric%20River%20Event%20at%20Davis%20.pdf doi:10.1029/2021JD035210 http://creativecommons.org/licenses/by-nc-nd/ info:eu-repo/semantics/OpenAccess ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.sorbonne-universite.fr/hal-03574447 Journal of Geophysical Research: Atmospheres, 2022, 127 (2), pp.e2021JD035210. ⟨10.1029/2021JD035210⟩ snowfall microphysics sublimation orographic gravity waves foehn atmospheric river Antarctica [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2022 ftinsu https://doi.org/10.1029/2021JD035210 2023-10-11T16:31:07Z International audience Intense snowfall sublimation was observed during a precipitation event over Davis in the Vestfold Hills, East Antarctica, from 08 to 10 January 2019. Radar observations and simulations from the Weather Research and Forecasting model revealed that orographic gravity waves (OGWs), generated by a north-easterly flow impinging on the ice ridge upstream of Davis, were responsible for snowfall sublimation through a foehn effect. Despite the strong meridional moisture advection associated with an atmospheric river (AR) during this event, almost no precipitation reached the ground at Davis. We found that the direction of the synoptic flow with respect to the orography determined the intensity of OGWs over Davis, which in turn directly influenced the snowfall microphysics. We hypothesize that turbulence induced by the OGWs likely enhanced the aggregation process, as identified thanks to dual-polarization and dual-frequency radar observations. This study suggests that despite the intense AR, the precipitation distribution was determined by local processes tied to the orography. The mechanisms found in this case study could contribute to the extremely dry climate of the Vestfold Hills, one of the main Antarctic oases. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Institut national des sciences de l'Univers: HAL-INSU Journal of Geophysical Research: Atmospheres 127 2 |
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Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
snowfall microphysics sublimation orographic gravity waves foehn atmospheric river Antarctica [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
snowfall microphysics sublimation orographic gravity waves foehn atmospheric river Antarctica [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Gehring, Josué Vignon, Étienne Billault‐roux, Anne‐claire Ferrone, Alfonso Protat, Alain Alexander, Simon, P Berne, Alexis Orographic Flow Influence on Precipitation During an Atmospheric River Event at Davis, Antarctica |
topic_facet |
snowfall microphysics sublimation orographic gravity waves foehn atmospheric river Antarctica [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience Intense snowfall sublimation was observed during a precipitation event over Davis in the Vestfold Hills, East Antarctica, from 08 to 10 January 2019. Radar observations and simulations from the Weather Research and Forecasting model revealed that orographic gravity waves (OGWs), generated by a north-easterly flow impinging on the ice ridge upstream of Davis, were responsible for snowfall sublimation through a foehn effect. Despite the strong meridional moisture advection associated with an atmospheric river (AR) during this event, almost no precipitation reached the ground at Davis. We found that the direction of the synoptic flow with respect to the orography determined the intensity of OGWs over Davis, which in turn directly influenced the snowfall microphysics. We hypothesize that turbulence induced by the OGWs likely enhanced the aggregation process, as identified thanks to dual-polarization and dual-frequency radar observations. This study suggests that despite the intense AR, the precipitation distribution was determined by local processes tied to the orography. The mechanisms found in this case study could contribute to the extremely dry climate of the Vestfold Hills, one of the main Antarctic oases. |
author2 |
Environmental Remote Sensing Laboratory Lausanne Ecole Polytechnique Fédérale de Lausanne (EPFL) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) Australian Bureau of Meteorology Melbourne (BoM) Australian Government Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia Australian Antarctic Division (AAD) Australian Government, Department of the Environment and Energy |
format |
Article in Journal/Newspaper |
author |
Gehring, Josué Vignon, Étienne Billault‐roux, Anne‐claire Ferrone, Alfonso Protat, Alain Alexander, Simon, P Berne, Alexis |
author_facet |
Gehring, Josué Vignon, Étienne Billault‐roux, Anne‐claire Ferrone, Alfonso Protat, Alain Alexander, Simon, P Berne, Alexis |
author_sort |
Gehring, Josué |
title |
Orographic Flow Influence on Precipitation During an Atmospheric River Event at Davis, Antarctica |
title_short |
Orographic Flow Influence on Precipitation During an Atmospheric River Event at Davis, Antarctica |
title_full |
Orographic Flow Influence on Precipitation During an Atmospheric River Event at Davis, Antarctica |
title_fullStr |
Orographic Flow Influence on Precipitation During an Atmospheric River Event at Davis, Antarctica |
title_full_unstemmed |
Orographic Flow Influence on Precipitation During an Atmospheric River Event at Davis, Antarctica |
title_sort |
orographic flow influence on precipitation during an atmospheric river event at davis, antarctica |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.sorbonne-universite.fr/hal-03574447 https://hal.sorbonne-universite.fr/hal-03574447/document https://hal.sorbonne-universite.fr/hal-03574447/file/JGR%20Atmospheres%20-%202022%20-%20Gehring%20-%20Orographic%20Flow%20Influence%20on%20Precipitation%20During%20an%20Atmospheric%20River%20Event%20at%20Davis%20.pdf https://doi.org/10.1029/2021JD035210 |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_source |
ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.sorbonne-universite.fr/hal-03574447 Journal of Geophysical Research: Atmospheres, 2022, 127 (2), pp.e2021JD035210. ⟨10.1029/2021JD035210⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2021JD035210 hal-03574447 https://hal.sorbonne-universite.fr/hal-03574447 https://hal.sorbonne-universite.fr/hal-03574447/document https://hal.sorbonne-universite.fr/hal-03574447/file/JGR%20Atmospheres%20-%202022%20-%20Gehring%20-%20Orographic%20Flow%20Influence%20on%20Precipitation%20During%20an%20Atmospheric%20River%20Event%20at%20Davis%20.pdf doi:10.1029/2021JD035210 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2021JD035210 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
127 |
container_issue |
2 |
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1781697473620738048 |