Biogeochemistry at the Early Stages of Ice Tormation: Insights from PIPERS
The PIPERS cruise on N. B. Palmer into the early winter Ross Sea took place between April and June 2017. PIPERS was a unique opportunity to investigate biogeochemistry of pack ice during early stages of ice formation. We will present insights of the dynamics of sympagic microalgae assemblages, nutri...
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ftorbi:oai:orbi.ulg.ac.be:2268/232375 2024-04-21T07:52:32+00:00 Biogeochemistry at the Early Stages of Ice Tormation: Insights from PIPERS Delille, Bruno Van der Linden, Fanny Carnat, G. Sapart, C. de Jong, J. Kotovitch, Marie Deman, Florian Dehairs, Frank Descy, Jean-Pierre Nomura, D. Stammerjohn, Sharon Ackley, Stephen Tison, J.-L. FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège 2018-06-20 https://orbi.uliege.be/handle/2268/232375 en eng https://orbi.uliege.be/handle/2268/232375 info:hdl:2268/232375 Open Science Conference POLAR2018, Davos, Switzerland [CH], 18-23 June 2018 Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique conference poster not in proceedings http://purl.org/coar/resource_type/c_18co info:eu-repo/semantics/conferencePoster 2018 ftorbi 2024-03-27T14:49:25Z The PIPERS cruise on N. B. Palmer into the early winter Ross Sea took place between April and June 2017. PIPERS was a unique opportunity to investigate biogeochemistry of pack ice during early stages of ice formation. We will present insights of the dynamics of sympagic microalgae assemblages, nutrients, particulate organic carbon and 2 potent greenhouse gases (carbon dioxide and nitrous oxide) during early ice growth. The comparison of CO2 fluxes over consolidated and unconsolidated ice show that 1) sea ice acts as a source of CO2 for the atmosphere 2) largest fluxes occur at the earliest sea ice growth stages (i.e. frazil ice, unconsolidated grey ice, pancake ice). Large fluxes are due to ongoing active rejection of impurities, high porosity of highly saline/high temperature young ice, and the absence of snow. Overall, snow appears to restrict CO2 fluxes. In some cases, fluxes over snow appears to be nil or even opposite to fluxes over bare ice. Therefore, while snow is often view as a transient buffer for air-ice gases fluxes, the role of snow appears to be more complicated. The new measurements of CO2 fluxes over young ice carried out during PIPERS potentially allow to complete a budget of CO2 fluxes over Antarctic pack ice by filling a significant gap. Conference Object Antarc* Antarctic Ross Sea Sea ice University of Liège: ORBi (Open Repository and Bibliography) |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Delille, Bruno Van der Linden, Fanny Carnat, G. Sapart, C. de Jong, J. Kotovitch, Marie Deman, Florian Dehairs, Frank Descy, Jean-Pierre Nomura, D. Stammerjohn, Sharon Ackley, Stephen Tison, J.-L. Biogeochemistry at the Early Stages of Ice Tormation: Insights from PIPERS |
topic_facet |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
The PIPERS cruise on N. B. Palmer into the early winter Ross Sea took place between April and June 2017. PIPERS was a unique opportunity to investigate biogeochemistry of pack ice during early stages of ice formation. We will present insights of the dynamics of sympagic microalgae assemblages, nutrients, particulate organic carbon and 2 potent greenhouse gases (carbon dioxide and nitrous oxide) during early ice growth. The comparison of CO2 fluxes over consolidated and unconsolidated ice show that 1) sea ice acts as a source of CO2 for the atmosphere 2) largest fluxes occur at the earliest sea ice growth stages (i.e. frazil ice, unconsolidated grey ice, pancake ice). Large fluxes are due to ongoing active rejection of impurities, high porosity of highly saline/high temperature young ice, and the absence of snow. Overall, snow appears to restrict CO2 fluxes. In some cases, fluxes over snow appears to be nil or even opposite to fluxes over bare ice. Therefore, while snow is often view as a transient buffer for air-ice gases fluxes, the role of snow appears to be more complicated. The new measurements of CO2 fluxes over young ice carried out during PIPERS potentially allow to complete a budget of CO2 fluxes over Antarctic pack ice by filling a significant gap. |
author2 |
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège |
format |
Conference Object |
author |
Delille, Bruno Van der Linden, Fanny Carnat, G. Sapart, C. de Jong, J. Kotovitch, Marie Deman, Florian Dehairs, Frank Descy, Jean-Pierre Nomura, D. Stammerjohn, Sharon Ackley, Stephen Tison, J.-L. |
author_facet |
Delille, Bruno Van der Linden, Fanny Carnat, G. Sapart, C. de Jong, J. Kotovitch, Marie Deman, Florian Dehairs, Frank Descy, Jean-Pierre Nomura, D. Stammerjohn, Sharon Ackley, Stephen Tison, J.-L. |
author_sort |
Delille, Bruno |
title |
Biogeochemistry at the Early Stages of Ice Tormation: Insights from PIPERS |
title_short |
Biogeochemistry at the Early Stages of Ice Tormation: Insights from PIPERS |
title_full |
Biogeochemistry at the Early Stages of Ice Tormation: Insights from PIPERS |
title_fullStr |
Biogeochemistry at the Early Stages of Ice Tormation: Insights from PIPERS |
title_full_unstemmed |
Biogeochemistry at the Early Stages of Ice Tormation: Insights from PIPERS |
title_sort |
biogeochemistry at the early stages of ice tormation: insights from pipers |
publishDate |
2018 |
url |
https://orbi.uliege.be/handle/2268/232375 |
genre |
Antarc* Antarctic Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Ross Sea Sea ice |
op_source |
Open Science Conference POLAR2018, Davos, Switzerland [CH], 18-23 June 2018 |
op_relation |
https://orbi.uliege.be/handle/2268/232375 info:hdl:2268/232375 |
_version_ |
1796935758027685888 |