Katabatic winds diminish precipitation contribution to the Antarctic ice mass balance
International audience Snowfall in Antarctica is a key term of the ice sheet mass budget that influences the sea level at global scale. Over the continental margins, persistent katabatic winds blow all year long and supply the lower troposphere with unsaturated air. We show that this dry air leads t...
Published in: | Proceedings of the National Academy of Sciences |
---|---|
Main Authors: | , , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2017
|
Subjects: | |
Online Access: | https://insu.hal.science/insu-03706519 https://doi.org/10.1073/pnas.1707633114 |
id |
ftunigrenoble:oai:HAL:insu-03706519v1 |
---|---|
record_format |
openpolar |
spelling |
ftunigrenoble:oai:HAL:insu-03706519v1 2024-05-19T07:32:10+00:00 Katabatic winds diminish precipitation contribution to the Antarctic ice mass balance Grazioli, Jacopo Madeleine, Jean-Baptiste Gallée, Hubert Forbes, Richard M. Genthon, Christophe Krinner, Gerhard Berne, Alexis Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-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) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) 2017 https://insu.hal.science/insu-03706519 https://doi.org/10.1073/pnas.1707633114 en eng HAL CCSD National Academy of Sciences info:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.1707633114 insu-03706519 https://insu.hal.science/insu-03706519 BIBCODE: 2017PNAS.11410858G doi:10.1073/pnas.1707633114 PUBMEDCENTRAL: PMC5642703 ISSN: 0027-8424 EISSN: 1091-6490 Proceedings of the National Academy of Sciences of the United States of America https://insu.hal.science/insu-03706519 Proceedings of the National Academy of Sciences of the United States of America, 2017, 114, pp.10858-10863. ⟨10.1073/pnas.1707633114⟩ Antarctica precipitation sublimation katabatic wind [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2017 ftunigrenoble https://doi.org/10.1073/pnas.1707633114 2024-04-25T00:26:08Z International audience Snowfall in Antarctica is a key term of the ice sheet mass budget that influences the sea level at global scale. Over the continental margins, persistent katabatic winds blow all year long and supply the lower troposphere with unsaturated air. We show that this dry air leads to significant low-level sublimation of snowfall. We found using unprecedented data collected over 1 year on the coast of Adélie Land and simulations from different atmospheric models that low-level sublimation accounts for a 17% reduction of total snowfall over the continent and up to 35% on the margins of East Antarctica, significantly affecting satellite-based estimations close to the ground. Our findings suggest that, as climate warming progresses, this process will be enhanced and will limit expected precipitation increases at the ground level. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet Université Grenoble Alpes: HAL Proceedings of the National Academy of Sciences 114 41 10858 10863 |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
Antarctica precipitation sublimation katabatic wind [SDU]Sciences of the Universe [physics] |
spellingShingle |
Antarctica precipitation sublimation katabatic wind [SDU]Sciences of the Universe [physics] Grazioli, Jacopo Madeleine, Jean-Baptiste Gallée, Hubert Forbes, Richard M. Genthon, Christophe Krinner, Gerhard Berne, Alexis Katabatic winds diminish precipitation contribution to the Antarctic ice mass balance |
topic_facet |
Antarctica precipitation sublimation katabatic wind [SDU]Sciences of the Universe [physics] |
description |
International audience Snowfall in Antarctica is a key term of the ice sheet mass budget that influences the sea level at global scale. Over the continental margins, persistent katabatic winds blow all year long and supply the lower troposphere with unsaturated air. We show that this dry air leads to significant low-level sublimation of snowfall. We found using unprecedented data collected over 1 year on the coast of Adélie Land and simulations from different atmospheric models that low-level sublimation accounts for a 17% reduction of total snowfall over the continent and up to 35% on the margins of East Antarctica, significantly affecting satellite-based estimations close to the ground. Our findings suggest that, as climate warming progresses, this process will be enhanced and will limit expected precipitation increases at the ground level. |
author2 |
Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-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) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) |
format |
Article in Journal/Newspaper |
author |
Grazioli, Jacopo Madeleine, Jean-Baptiste Gallée, Hubert Forbes, Richard M. Genthon, Christophe Krinner, Gerhard Berne, Alexis |
author_facet |
Grazioli, Jacopo Madeleine, Jean-Baptiste Gallée, Hubert Forbes, Richard M. Genthon, Christophe Krinner, Gerhard Berne, Alexis |
author_sort |
Grazioli, Jacopo |
title |
Katabatic winds diminish precipitation contribution to the Antarctic ice mass balance |
title_short |
Katabatic winds diminish precipitation contribution to the Antarctic ice mass balance |
title_full |
Katabatic winds diminish precipitation contribution to the Antarctic ice mass balance |
title_fullStr |
Katabatic winds diminish precipitation contribution to the Antarctic ice mass balance |
title_full_unstemmed |
Katabatic winds diminish precipitation contribution to the Antarctic ice mass balance |
title_sort |
katabatic winds diminish precipitation contribution to the antarctic ice mass balance |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://insu.hal.science/insu-03706519 https://doi.org/10.1073/pnas.1707633114 |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
op_source |
ISSN: 0027-8424 EISSN: 1091-6490 Proceedings of the National Academy of Sciences of the United States of America https://insu.hal.science/insu-03706519 Proceedings of the National Academy of Sciences of the United States of America, 2017, 114, pp.10858-10863. ⟨10.1073/pnas.1707633114⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.1707633114 insu-03706519 https://insu.hal.science/insu-03706519 BIBCODE: 2017PNAS.11410858G doi:10.1073/pnas.1707633114 PUBMEDCENTRAL: PMC5642703 |
op_doi |
https://doi.org/10.1073/pnas.1707633114 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
114 |
container_issue |
41 |
container_start_page |
10858 |
op_container_end_page |
10863 |
_version_ |
1799470132150403072 |