Physical and biological controls on DMS,P dynamics in ice shelf-influenced fast ice during a winter-spring and a spring-summer transitions
We report the seasonal and vertical variations of dimethylsulfide (DMS) and its precursor dimethylsulfoniopropionate (DMSP) in fast ice at Cape Evans, McMurdo Sound (Antarctica) during the spring-summer transition in 2011 and winter-spring transition in 2012. We compare the variations of DMS,P obser...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/183924 2023-05-15T13:46:28+02:00 Physical and biological controls on DMS,P dynamics in ice shelf-influenced fast ice during a winter-spring and a spring-summer transitions Carnat, Gauthier Zhou, Jiayun Papakyriakou, Tim Delille, Bruno Goossens, Thomas Haskell, Timothy Schoemann, Véronique Fripiat, François Rintala, Janne Markus Tison, Jean-Louis 2014 No full-text files http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/183924 en eng uri/info:doi/10.1002/2013JC009381 uri/info:scp/84902779276 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/183924 Journal of geophysical research. Oceans, 119 (5 Sciences de l'espace Phénomènes atmosphériques Géographie physique Sciences de la terre et du cosmos Océanographie physique et chimique Océanographie biologique dimethylsulfide McMurdo Sound platelet sea ice info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2014 ftunivbruxelles 2022-06-12T21:02:50Z We report the seasonal and vertical variations of dimethylsulfide (DMS) and its precursor dimethylsulfoniopropionate (DMSP) in fast ice at Cape Evans, McMurdo Sound (Antarctica) during the spring-summer transition in 2011 and winter-spring transition in 2012. We compare the variations of DMS,P observed to the seasonal evolution of the ice algal biomass and of the physical properties of the ice cover, with emphasis on the ice texture and brine dynamics. Isolated DMS and DMSP maxima were found during both seasonal episodes in interior ice and corresponded to the occurrence of platelet crystals in the ice texture. We show that platelet crystals formation corresponded in time and depth to the incorporation of dinoflagellates (strong DMSP producers) in the ice cover. We also show that platelet crystals could modify the environmental stresses on algal cells and perturb the vertical redistribution of DMS,P concentrations. We show that during the winter-spring transition in 2012, the DMS,P profiles were strongly influenced by the development and decline of a diatom-dominated bloom in the bottom ice, with DMSP variations remarkably following chl a variations. During the spring-summer transition in 2011, the increase in brine volume fraction (influencing ice permeability) on warming was shown to trigger (1) an important release of DMS to the under-ice water through brine convection and (2) a vertical redistribution of DMSP across the ice. Key Points Incorporated platelet ice can strongly influence fast ice DMS,P dynamics The seasonal bloom of diatoms governs DMSP production in bottom ice Brine convection at the end of spring triggers strong DMS release to the ocean © 2014. American Geophysical Union. All Rights Reserved. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctica Ice Shelf McMurdo Sound Sea ice DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Cape Evans ENVELOPE(161.550,161.550,-75.100,-75.100) McMurdo Sound |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Sciences de l'espace Phénomènes atmosphériques Géographie physique Sciences de la terre et du cosmos Océanographie physique et chimique Océanographie biologique dimethylsulfide McMurdo Sound platelet sea ice |
spellingShingle |
Sciences de l'espace Phénomènes atmosphériques Géographie physique Sciences de la terre et du cosmos Océanographie physique et chimique Océanographie biologique dimethylsulfide McMurdo Sound platelet sea ice Carnat, Gauthier Zhou, Jiayun Papakyriakou, Tim Delille, Bruno Goossens, Thomas Haskell, Timothy Schoemann, Véronique Fripiat, François Rintala, Janne Markus Tison, Jean-Louis Physical and biological controls on DMS,P dynamics in ice shelf-influenced fast ice during a winter-spring and a spring-summer transitions |
topic_facet |
Sciences de l'espace Phénomènes atmosphériques Géographie physique Sciences de la terre et du cosmos Océanographie physique et chimique Océanographie biologique dimethylsulfide McMurdo Sound platelet sea ice |
description |
We report the seasonal and vertical variations of dimethylsulfide (DMS) and its precursor dimethylsulfoniopropionate (DMSP) in fast ice at Cape Evans, McMurdo Sound (Antarctica) during the spring-summer transition in 2011 and winter-spring transition in 2012. We compare the variations of DMS,P observed to the seasonal evolution of the ice algal biomass and of the physical properties of the ice cover, with emphasis on the ice texture and brine dynamics. Isolated DMS and DMSP maxima were found during both seasonal episodes in interior ice and corresponded to the occurrence of platelet crystals in the ice texture. We show that platelet crystals formation corresponded in time and depth to the incorporation of dinoflagellates (strong DMSP producers) in the ice cover. We also show that platelet crystals could modify the environmental stresses on algal cells and perturb the vertical redistribution of DMS,P concentrations. We show that during the winter-spring transition in 2012, the DMS,P profiles were strongly influenced by the development and decline of a diatom-dominated bloom in the bottom ice, with DMSP variations remarkably following chl a variations. During the spring-summer transition in 2011, the increase in brine volume fraction (influencing ice permeability) on warming was shown to trigger (1) an important release of DMS to the under-ice water through brine convection and (2) a vertical redistribution of DMSP across the ice. Key Points Incorporated platelet ice can strongly influence fast ice DMS,P dynamics The seasonal bloom of diatoms governs DMSP production in bottom ice Brine convection at the end of spring triggers strong DMS release to the ocean © 2014. American Geophysical Union. All Rights Reserved. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Carnat, Gauthier Zhou, Jiayun Papakyriakou, Tim Delille, Bruno Goossens, Thomas Haskell, Timothy Schoemann, Véronique Fripiat, François Rintala, Janne Markus Tison, Jean-Louis |
author_facet |
Carnat, Gauthier Zhou, Jiayun Papakyriakou, Tim Delille, Bruno Goossens, Thomas Haskell, Timothy Schoemann, Véronique Fripiat, François Rintala, Janne Markus Tison, Jean-Louis |
author_sort |
Carnat, Gauthier |
title |
Physical and biological controls on DMS,P dynamics in ice shelf-influenced fast ice during a winter-spring and a spring-summer transitions |
title_short |
Physical and biological controls on DMS,P dynamics in ice shelf-influenced fast ice during a winter-spring and a spring-summer transitions |
title_full |
Physical and biological controls on DMS,P dynamics in ice shelf-influenced fast ice during a winter-spring and a spring-summer transitions |
title_fullStr |
Physical and biological controls on DMS,P dynamics in ice shelf-influenced fast ice during a winter-spring and a spring-summer transitions |
title_full_unstemmed |
Physical and biological controls on DMS,P dynamics in ice shelf-influenced fast ice during a winter-spring and a spring-summer transitions |
title_sort |
physical and biological controls on dms,p dynamics in ice shelf-influenced fast ice during a winter-spring and a spring-summer transitions |
publishDate |
2014 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/183924 |
long_lat |
ENVELOPE(161.550,161.550,-75.100,-75.100) |
geographic |
Cape Evans McMurdo Sound |
geographic_facet |
Cape Evans McMurdo Sound |
genre |
Antarc* Antarctica Ice Shelf McMurdo Sound Sea ice |
genre_facet |
Antarc* Antarctica Ice Shelf McMurdo Sound Sea ice |
op_source |
Journal of geophysical research. Oceans, 119 (5 |
op_relation |
uri/info:doi/10.1002/2013JC009381 uri/info:scp/84902779276 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/183924 |
_version_ |
1766243074599550976 |