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Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons
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| Zeitschriftentitel: | Journal of Geophysical Research: Oceans |
|---|---|
| Personen und Körperschaften: | , , , , , , , , , |
| In: | Journal of Geophysical Research: Oceans, 118, 2013, 6, S. 3172-3189 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
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| Schlagwörter: |
| author_facet |
Zhou, Jiayun Delille, Bruno Eicken, Hajo Vancoppenolle, Martin Brabant, Frédéric Carnat, Gauthier Geilfus, Nicolas‐Xavier Papakyriakou, Tim Heinesch, Bernard Tison, Jean‐Louis Zhou, Jiayun Delille, Bruno Eicken, Hajo Vancoppenolle, Martin Brabant, Frédéric Carnat, Gauthier Geilfus, Nicolas‐Xavier Papakyriakou, Tim Heinesch, Bernard Tison, Jean‐Louis |
|---|---|
| author |
Zhou, Jiayun Delille, Bruno Eicken, Hajo Vancoppenolle, Martin Brabant, Frédéric Carnat, Gauthier Geilfus, Nicolas‐Xavier Papakyriakou, Tim Heinesch, Bernard Tison, Jean‐Louis |
| spellingShingle |
Zhou, Jiayun Delille, Bruno Eicken, Hajo Vancoppenolle, Martin Brabant, Frédéric Carnat, Gauthier Geilfus, Nicolas‐Xavier Papakyriakou, Tim Heinesch, Bernard Tison, Jean‐Louis Journal of Geophysical Research: Oceans Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Geochemistry and Petrology Geophysics Oceanography |
| author_sort |
zhou, jiayun |
| spelling |
Zhou, Jiayun Delille, Bruno Eicken, Hajo Vancoppenolle, Martin Brabant, Frédéric Carnat, Gauthier Geilfus, Nicolas‐Xavier Papakyriakou, Tim Heinesch, Bernard Tison, Jean‐Louis 2169-9275 2169-9291 American Geophysical Union (AGU) Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Geochemistry and Petrology Geophysics Oceanography http://dx.doi.org/10.1002/jgrc.20232 <jats:p>The impacts of the seasonal evolution of sea‐ice physical properties on ice‐ocean biogeochemical exchanges were investigated in landfast ice at Barrow (Alaska) from January through June 2009. Three stages of brine dynamics across the annual cycle have been identified based on brine salinity, brine volume fraction, and porous medium Rayleigh number (Ra). These are sea‐ice bottom‐layer convection, full‐depth convection, and brine stratification. We further discuss the impact of brine dynamics on biogeochemical compounds in sea ice: stable isotopes of water (δD, δ<jats:sup>18</jats:sup>O), nutrients (NO<jats:sub>3</jats:sub><jats:sup>−</jats:sup>, PO<jats:sub>4</jats:sub><jats:sup>3−</jats:sup>, NH<jats:sub>4</jats:sub><jats:sup>+</jats:sup>), microalgae (chlorophyll‐a), and inert gas (argon). In general, full‐depth convection events favor exchanges between sea ice and seawater, while brine stratification limits these exchanges. However, argon responds differently to brine dynamics than the other biogeochemical compounds analyzed in this study. This contrast is attributed to the impact of bubble nucleation on inert gas transport compared to the other biogeochemical compounds. We present a scenario for argon bubble formation and evolution in sea ice and suggest that a brine volume fraction approaching 7.5–10% is required for inert gas bubbles to escape from sea ice to the atmosphere.</jats:p> Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons Journal of Geophysical Research: Oceans |
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10.1002/jgrc.20232 |
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| title |
Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons |
| title_unstemmed |
Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons |
| title_full |
Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons |
| title_fullStr |
Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons |
| title_full_unstemmed |
Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons |
| title_short |
Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons |
| title_sort |
physical and biogeochemical properties in landfast sea ice (barrow, alaska): insights on brine and gas dynamics across seasons |
| topic |
Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Geochemistry and Petrology Geophysics Oceanography |
| url |
http://dx.doi.org/10.1002/jgrc.20232 |
| publishDate |
2013 |
| physical |
3172-3189 |
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<jats:p>The impacts of the seasonal evolution of sea‐ice physical properties on ice‐ocean biogeochemical exchanges were investigated in landfast ice at Barrow (Alaska) from January through June 2009. Three stages of brine dynamics across the annual cycle have been identified based on brine salinity, brine volume fraction, and porous medium Rayleigh number (Ra). These are sea‐ice bottom‐layer convection, full‐depth convection, and brine stratification. We further discuss the impact of brine dynamics on biogeochemical compounds in sea ice: stable isotopes of water (δD, δ<jats:sup>18</jats:sup>O), nutrients (NO<jats:sub>3</jats:sub><jats:sup>−</jats:sup>, PO<jats:sub>4</jats:sub><jats:sup>3−</jats:sup>, NH<jats:sub>4</jats:sub><jats:sup>+</jats:sup>), microalgae (chlorophyll‐a), and inert gas (argon). In general, full‐depth convection events favor exchanges between sea ice and seawater, while brine stratification limits these exchanges. However, argon responds differently to brine dynamics than the other biogeochemical compounds analyzed in this study. This contrast is attributed to the impact of bubble nucleation on inert gas transport compared to the other biogeochemical compounds. We present a scenario for argon bubble formation and evolution in sea ice and suggest that a brine volume fraction approaching 7.5–10% is required for inert gas bubbles to escape from sea ice to the atmosphere.</jats:p> |
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| author | Zhou, Jiayun, Delille, Bruno, Eicken, Hajo, Vancoppenolle, Martin, Brabant, Frédéric, Carnat, Gauthier, Geilfus, Nicolas‐Xavier, Papakyriakou, Tim, Heinesch, Bernard, Tison, Jean‐Louis |
| author_facet | Zhou, Jiayun, Delille, Bruno, Eicken, Hajo, Vancoppenolle, Martin, Brabant, Frédéric, Carnat, Gauthier, Geilfus, Nicolas‐Xavier, Papakyriakou, Tim, Heinesch, Bernard, Tison, Jean‐Louis, Zhou, Jiayun, Delille, Bruno, Eicken, Hajo, Vancoppenolle, Martin, Brabant, Frédéric, Carnat, Gauthier, Geilfus, Nicolas‐Xavier, Papakyriakou, Tim, Heinesch, Bernard, Tison, Jean‐Louis |
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| description | <jats:p>The impacts of the seasonal evolution of sea‐ice physical properties on ice‐ocean biogeochemical exchanges were investigated in landfast ice at Barrow (Alaska) from January through June 2009. Three stages of brine dynamics across the annual cycle have been identified based on brine salinity, brine volume fraction, and porous medium Rayleigh number (Ra). These are sea‐ice bottom‐layer convection, full‐depth convection, and brine stratification. We further discuss the impact of brine dynamics on biogeochemical compounds in sea ice: stable isotopes of water (δD, δ<jats:sup>18</jats:sup>O), nutrients (NO<jats:sub>3</jats:sub><jats:sup>−</jats:sup>, PO<jats:sub>4</jats:sub><jats:sup>3−</jats:sup>, NH<jats:sub>4</jats:sub><jats:sup>+</jats:sup>), microalgae (chlorophyll‐a), and inert gas (argon). In general, full‐depth convection events favor exchanges between sea ice and seawater, while brine stratification limits these exchanges. However, argon responds differently to brine dynamics than the other biogeochemical compounds analyzed in this study. This contrast is attributed to the impact of bubble nucleation on inert gas transport compared to the other biogeochemical compounds. We present a scenario for argon bubble formation and evolution in sea ice and suggest that a brine volume fraction approaching 7.5–10% is required for inert gas bubbles to escape from sea ice to the atmosphere.</jats:p> |
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| spelling | Zhou, Jiayun Delille, Bruno Eicken, Hajo Vancoppenolle, Martin Brabant, Frédéric Carnat, Gauthier Geilfus, Nicolas‐Xavier Papakyriakou, Tim Heinesch, Bernard Tison, Jean‐Louis 2169-9275 2169-9291 American Geophysical Union (AGU) Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Geochemistry and Petrology Geophysics Oceanography http://dx.doi.org/10.1002/jgrc.20232 <jats:p>The impacts of the seasonal evolution of sea‐ice physical properties on ice‐ocean biogeochemical exchanges were investigated in landfast ice at Barrow (Alaska) from January through June 2009. Three stages of brine dynamics across the annual cycle have been identified based on brine salinity, brine volume fraction, and porous medium Rayleigh number (Ra). These are sea‐ice bottom‐layer convection, full‐depth convection, and brine stratification. We further discuss the impact of brine dynamics on biogeochemical compounds in sea ice: stable isotopes of water (δD, δ<jats:sup>18</jats:sup>O), nutrients (NO<jats:sub>3</jats:sub><jats:sup>−</jats:sup>, PO<jats:sub>4</jats:sub><jats:sup>3−</jats:sup>, NH<jats:sub>4</jats:sub><jats:sup>+</jats:sup>), microalgae (chlorophyll‐a), and inert gas (argon). In general, full‐depth convection events favor exchanges between sea ice and seawater, while brine stratification limits these exchanges. However, argon responds differently to brine dynamics than the other biogeochemical compounds analyzed in this study. This contrast is attributed to the impact of bubble nucleation on inert gas transport compared to the other biogeochemical compounds. We present a scenario for argon bubble formation and evolution in sea ice and suggest that a brine volume fraction approaching 7.5–10% is required for inert gas bubbles to escape from sea ice to the atmosphere.</jats:p> Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons Journal of Geophysical Research: Oceans |
| spellingShingle | Zhou, Jiayun, Delille, Bruno, Eicken, Hajo, Vancoppenolle, Martin, Brabant, Frédéric, Carnat, Gauthier, Geilfus, Nicolas‐Xavier, Papakyriakou, Tim, Heinesch, Bernard, Tison, Jean‐Louis, Journal of Geophysical Research: Oceans, Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons, Earth and Planetary Sciences (miscellaneous), Space and Planetary Science, Geochemistry and Petrology, Geophysics, Oceanography |
| title | Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons |
| title_full | Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons |
| title_fullStr | Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons |
| title_full_unstemmed | Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons |
| title_short | Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons |
| title_sort | physical and biogeochemical properties in landfast sea ice (barrow, alaska): insights on brine and gas dynamics across seasons |
| title_unstemmed | Physical and biogeochemical properties in landfast sea ice (Barrow, Alaska): Insights on brine and gas dynamics across seasons |
| topic | Earth and Planetary Sciences (miscellaneous), Space and Planetary Science, Geochemistry and Petrology, Geophysics, Oceanography |
| url | http://dx.doi.org/10.1002/jgrc.20232 |