Contrasted Summer Processes in the Sea Ice for Two Neighboring Floes North of 84°N: Surface and Basal Melt and False Bottom Formation
International audience We report continuous observations in the high Arctic (north of 84°N) over the full 2013 summer season at two nearby sites with distinct initial snow depth, ice thickness, and altitude with respect to the local ice topography. The two sites, subject to similar atmospheric condi...
Published in: | Journal of Geophysical Research: Oceans |
---|---|
Main Authors: | , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2019
|
Subjects: | |
Online Access: | https://hal.science/hal-03015318 https://hal.science/hal-03015318/document https://hal.science/hal-03015318/file/Provost_et_al-2019-Journal_of_Geophysical_Research__Oceans.pdf https://doi.org/10.1029/2019JC015000 |
id |
ftinsu:oai:HAL:hal-03015318v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Provost, Christine Sennéchael, Nathalie Sirven, Jérôme Contrasted Summer Processes in the Sea Ice for Two Neighboring Floes North of 84°N: Surface and Basal Melt and False Bottom Formation |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience We report continuous observations in the high Arctic (north of 84°N) over the full 2013 summer season at two nearby sites with distinct initial snow depth, ice thickness, and altitude with respect to the local ice topography. The two sites, subject to similar atmospheric conditions that did not favor strong ice melt, showed contrasting evolutions. One site, with initially thin sea ice (1.40 m) at a relatively low location of the floe, witnessed the formation of a spectacular 1.20-m-deep melt pond, a pond-enhanced erosion of the ice surface, and a sudden pond drainage into the ocean. Then, the outpoured fresh water rapidly froze, heated the old ice from below, and also acted as a temporary shield from the ocean heat flux while it was progressively ablated through dissolution. Eventually, the site almost recovered its initial ice thickness. In contrast, the other site, with initially thicker sea ice (1.75 m) at a relatively high location on its floe, did not support any significant meltwater and underwent over 0.5 m of continuous basal ablation. The two sites experienced formation of superimposed and interposed ice. Sea ice survived summer melt at the two sites, which entered the refreezing season with similar snow and ice thicknesses. For the first time, processes associated with the formation of a deep melt pond and subsequent false bottom evolution are continuously documented with ice mass balance instruments. Plain Language Summary Summer processes in the sea ice in a changing Arctic are documented at two nearby sites in the high Arctic (north of 84°N) in summer 2013. We report the first continuous observations of the formation of a melt pond more than 1.2 m deep, and the evolution of the fresh water after it outpoured to the ocean through a drainage hole at one site located in a topographic low. A nearby site, located on a topographic high, experienced very different evolution with no meltwater retention at the surface and continuous basal melting. |
author2 |
Austral, Boréal et Carbone (ABC) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) ANR-10-EQPX-0032,IAOOS,Système d'observation de la glace, de l'atmopshère et de l'océan en Arctique(2010) |
format |
Article in Journal/Newspaper |
author |
Provost, Christine Sennéchael, Nathalie Sirven, Jérôme |
author_facet |
Provost, Christine Sennéchael, Nathalie Sirven, Jérôme |
author_sort |
Provost, Christine |
title |
Contrasted Summer Processes in the Sea Ice for Two Neighboring Floes North of 84°N: Surface and Basal Melt and False Bottom Formation |
title_short |
Contrasted Summer Processes in the Sea Ice for Two Neighboring Floes North of 84°N: Surface and Basal Melt and False Bottom Formation |
title_full |
Contrasted Summer Processes in the Sea Ice for Two Neighboring Floes North of 84°N: Surface and Basal Melt and False Bottom Formation |
title_fullStr |
Contrasted Summer Processes in the Sea Ice for Two Neighboring Floes North of 84°N: Surface and Basal Melt and False Bottom Formation |
title_full_unstemmed |
Contrasted Summer Processes in the Sea Ice for Two Neighboring Floes North of 84°N: Surface and Basal Melt and False Bottom Formation |
title_sort |
contrasted summer processes in the sea ice for two neighboring floes north of 84°n: surface and basal melt and false bottom formation |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-03015318 https://hal.science/hal-03015318/document https://hal.science/hal-03015318/file/Provost_et_al-2019-Journal_of_Geophysical_Research__Oceans.pdf https://doi.org/10.1029/2019JC015000 |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-03015318 Journal of Geophysical Research. Oceans, 2019, 124 (6), pp.3963-3986. ⟨10.1029/2019JC015000⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2019JC015000 hal-03015318 https://hal.science/hal-03015318 https://hal.science/hal-03015318/document https://hal.science/hal-03015318/file/Provost_et_al-2019-Journal_of_Geophysical_Research__Oceans.pdf doi:10.1029/2019JC015000 WOS: 000477722200027 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2019JC015000 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
124 |
container_issue |
6 |
container_start_page |
3963 |
op_container_end_page |
3986 |
_version_ |
1797577590846783488 |
spelling |
ftinsu:oai:HAL:hal-03015318v1 2024-04-28T08:09:09+00:00 Contrasted Summer Processes in the Sea Ice for Two Neighboring Floes North of 84°N: Surface and Basal Melt and False Bottom Formation Provost, Christine Sennéchael, Nathalie Sirven, Jérôme Austral, Boréal et Carbone (ABC) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) ANR-10-EQPX-0032,IAOOS,Système d'observation de la glace, de l'atmopshère et de l'océan en Arctique(2010) 2019 https://hal.science/hal-03015318 https://hal.science/hal-03015318/document https://hal.science/hal-03015318/file/Provost_et_al-2019-Journal_of_Geophysical_Research__Oceans.pdf https://doi.org/10.1029/2019JC015000 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/2019JC015000 hal-03015318 https://hal.science/hal-03015318 https://hal.science/hal-03015318/document https://hal.science/hal-03015318/file/Provost_et_al-2019-Journal_of_Geophysical_Research__Oceans.pdf doi:10.1029/2019JC015000 WOS: 000477722200027 info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-03015318 Journal of Geophysical Research. Oceans, 2019, 124 (6), pp.3963-3986. ⟨10.1029/2019JC015000⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2019 ftinsu https://doi.org/10.1029/2019JC015000 2024-04-05T00:40:08Z International audience We report continuous observations in the high Arctic (north of 84°N) over the full 2013 summer season at two nearby sites with distinct initial snow depth, ice thickness, and altitude with respect to the local ice topography. The two sites, subject to similar atmospheric conditions that did not favor strong ice melt, showed contrasting evolutions. One site, with initially thin sea ice (1.40 m) at a relatively low location of the floe, witnessed the formation of a spectacular 1.20-m-deep melt pond, a pond-enhanced erosion of the ice surface, and a sudden pond drainage into the ocean. Then, the outpoured fresh water rapidly froze, heated the old ice from below, and also acted as a temporary shield from the ocean heat flux while it was progressively ablated through dissolution. Eventually, the site almost recovered its initial ice thickness. In contrast, the other site, with initially thicker sea ice (1.75 m) at a relatively high location on its floe, did not support any significant meltwater and underwent over 0.5 m of continuous basal ablation. The two sites experienced formation of superimposed and interposed ice. Sea ice survived summer melt at the two sites, which entered the refreezing season with similar snow and ice thicknesses. For the first time, processes associated with the formation of a deep melt pond and subsequent false bottom evolution are continuously documented with ice mass balance instruments. Plain Language Summary Summer processes in the sea ice in a changing Arctic are documented at two nearby sites in the high Arctic (north of 84°N) in summer 2013. We report the first continuous observations of the formation of a melt pond more than 1.2 m deep, and the evolution of the fresh water after it outpoured to the ocean through a drainage hole at one site located in a topographic low. A nearby site, located on a topographic high, experienced very different evolution with no meltwater retention at the surface and continuous basal melting. Article in Journal/Newspaper Arctic Sea ice Institut national des sciences de l'Univers: HAL-INSU Journal of Geophysical Research: Oceans 124 6 3963 3986 |