Eintrag weiter verarbeiten
The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet
Gespeichert in:
| Zeitschriftentitel: | Journal of Geophysical Research: Oceans |
|---|---|
| Personen und Körperschaften: | , , , , , , |
| In: | Journal of Geophysical Research: Oceans, 125, 2020, 9 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
|
| Schlagwörter: |
| author_facet |
Bett, David T. Holland, Paul R. Naveira Garabato, Alberto C. Jenkins, Adrian Dutrieux, Pierre Kimura, Satoshi Fleming, Andrew Bett, David T. Holland, Paul R. Naveira Garabato, Alberto C. Jenkins, Adrian Dutrieux, Pierre Kimura, Satoshi Fleming, Andrew |
|---|---|
| author |
Bett, David T. Holland, Paul R. Naveira Garabato, Alberto C. Jenkins, Adrian Dutrieux, Pierre Kimura, Satoshi Fleming, Andrew |
| spellingShingle |
Bett, David T. Holland, Paul R. Naveira Garabato, Alberto C. Jenkins, Adrian Dutrieux, Pierre Kimura, Satoshi Fleming, Andrew Journal of Geophysical Research: Oceans The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Geochemistry and Petrology Geophysics Oceanography |
| author_sort |
bett, david t. |
| spelling |
Bett, David T. Holland, Paul R. Naveira Garabato, Alberto C. Jenkins, Adrian Dutrieux, Pierre Kimura, Satoshi Fleming, Andrew 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/10.1029/2020jc016305 <jats:title>Abstract</jats:title><jats:p>The Amundsen Sea has the highest thinning rates of ice shelves in Antarctica. This imbalance is caused by changes in ocean melting induced by warm Circumpolar Deep Water (CDW) intrusions. The resulting changing freshwater balance could affect the on‐shelf currents and mixing. However, a clear understanding of the sources and sinks of freshwater in the region is lacking. Here we use a model of the Amundsen Sea, with passive freshwater tracers, to investigate the relative magnitudes and spatial distributions of the different freshwater components. In the surface layer and as a depth average, all freshwater tracer concentrations are of comparable magnitude, though on a depth average, sea ice and ice shelf are largest. The total freshwater tracer distribution is similar to that of the ice‐shelf tracer field. This implies a potential for ice‐shelf meltwater feedbacks, whereby abundant ice‐shelf meltwater alters the ocean circulation and stratification, affecting melting. Ice‐shelf and sea‐ice freshwater fluxes have the largest interannual variability. The effect of including grounded icebergs and iceberg freshwater flux are studied in detail. The presence of icebergs increases CDW intrusions that reach the base of ice shelves. This suggests another possible feedback mechanism, whereby more icebergs induce greater ice‐shelf melting and hence more icebergs. However, the strength of this potential feedback is dependent on poorly constrained sea‐ice model parameters. These results imply that poorly constrained parameters relating to the ocean freshwater balance, such as those relating to icebergs and sea ice, impact predictions for melting of the West Antarctic Ice Sheet.</jats:p> The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet Journal of Geophysical Research: Oceans |
| doi_str_mv |
10.1029/2020jc016305 |
| facet_avail |
Online Free |
| finc_class_facet |
Chemie und Pharmazie Allgemeine Naturwissenschaft Geologie und Paläontologie Geographie Physik Technik |
| format |
ElectronicArticle |
| fullrecord |
blob:ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTAyOS8yMDIwamMwMTYzMDU |
| id |
ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTAyOS8yMDIwamMwMTYzMDU |
| institution |
DE-Gla1 DE-Zi4 DE-15 DE-Pl11 DE-Rs1 DE-105 DE-14 DE-Ch1 DE-L229 DE-D275 DE-Bn3 DE-Brt1 DE-Zwi2 DE-D161 |
| imprint |
American Geophysical Union (AGU), 2020 |
| imprint_str_mv |
American Geophysical Union (AGU), 2020 |
| issn |
2169-9275 2169-9291 |
| issn_str_mv |
2169-9275 2169-9291 |
| language |
English |
| mega_collection |
American Geophysical Union (AGU) (CrossRef) |
| match_str |
bett2020theimpactoftheamundsenseafreshwaterbalanceonoceanmeltingofthewestantarcticicesheet |
| publishDateSort |
2020 |
| publisher |
American Geophysical Union (AGU) |
| recordtype |
ai |
| record_format |
ai |
| series |
Journal of Geophysical Research: Oceans |
| source_id |
49 |
| title |
The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet |
| title_unstemmed |
The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet |
| title_full |
The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet |
| title_fullStr |
The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet |
| title_full_unstemmed |
The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet |
| title_short |
The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet |
| title_sort |
the impact of the amundsen sea freshwater balance on ocean melting of the west antarctic ice sheet |
| topic |
Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Geochemistry and Petrology Geophysics Oceanography |
| url |
http://dx.doi.org/10.1029/2020jc016305 |
| publishDate |
2020 |
| physical |
|
| description |
<jats:title>Abstract</jats:title><jats:p>The Amundsen Sea has the highest thinning rates of ice shelves in Antarctica. This imbalance is caused by changes in ocean melting induced by warm Circumpolar Deep Water (CDW) intrusions. The resulting changing freshwater balance could affect the on‐shelf currents and mixing. However, a clear understanding of the sources and sinks of freshwater in the region is lacking. Here we use a model of the Amundsen Sea, with passive freshwater tracers, to investigate the relative magnitudes and spatial distributions of the different freshwater components. In the surface layer and as a depth average, all freshwater tracer concentrations are of comparable magnitude, though on a depth average, sea ice and ice shelf are largest. The total freshwater tracer distribution is similar to that of the ice‐shelf tracer field. This implies a potential for ice‐shelf meltwater feedbacks, whereby abundant ice‐shelf meltwater alters the ocean circulation and stratification, affecting melting. Ice‐shelf and sea‐ice freshwater fluxes have the largest interannual variability. The effect of including grounded icebergs and iceberg freshwater flux are studied in detail. The presence of icebergs increases CDW intrusions that reach the base of ice shelves. This suggests another possible feedback mechanism, whereby more icebergs induce greater ice‐shelf melting and hence more icebergs. However, the strength of this potential feedback is dependent on poorly constrained sea‐ice model parameters. These results imply that poorly constrained parameters relating to the ocean freshwater balance, such as those relating to icebergs and sea ice, impact predictions for melting of the West Antarctic Ice Sheet.</jats:p> |
| container_issue |
9 |
| container_start_page |
0 |
| container_title |
Journal of Geophysical Research: Oceans |
| container_volume |
125 |
| format_de105 |
Article, E-Article |
| format_de14 |
Article, E-Article |
| format_de15 |
Article, E-Article |
| format_de520 |
Article, E-Article |
| format_de540 |
Article, E-Article |
| format_dech1 |
Article, E-Article |
| format_ded117 |
Article, E-Article |
| format_degla1 |
E-Article |
| format_del152 |
Buch |
| format_del189 |
Article, E-Article |
| format_dezi4 |
Article |
| format_dezwi2 |
Article, E-Article |
| format_finc |
Article, E-Article |
| format_nrw |
Article, E-Article |
| _version_ |
1792342561044561928 |
| geogr_code |
not assigned |
| last_indexed |
2024-03-01T16:37:46.109Z |
| geogr_code_person |
not assigned |
| openURL |
url_ver=Z39.88-2004&ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fvufind.svn.sourceforge.net%3Agenerator&rft.title=The+Impact+of+the+Amundsen+Sea+Freshwater+Balance+on+Ocean+Melting+of+the+West+Antarctic+Ice+Sheet&rft.date=2020-09-01&genre=article&issn=2169-9291&volume=125&issue=9&jtitle=Journal+of+Geophysical+Research%3A+Oceans&atitle=The+Impact+of+the+Amundsen+Sea+Freshwater+Balance+on+Ocean+Melting+of+the+West+Antarctic+Ice+Sheet&aulast=Fleming&aufirst=Andrew&rft_id=info%3Adoi%2F10.1029%2F2020jc016305&rft.language%5B0%5D=eng |
| SOLR | |
| _version_ | 1792342561044561928 |
| author | Bett, David T., Holland, Paul R., Naveira Garabato, Alberto C., Jenkins, Adrian, Dutrieux, Pierre, Kimura, Satoshi, Fleming, Andrew |
| author_facet | Bett, David T., Holland, Paul R., Naveira Garabato, Alberto C., Jenkins, Adrian, Dutrieux, Pierre, Kimura, Satoshi, Fleming, Andrew, Bett, David T., Holland, Paul R., Naveira Garabato, Alberto C., Jenkins, Adrian, Dutrieux, Pierre, Kimura, Satoshi, Fleming, Andrew |
| author_sort | bett, david t. |
| container_issue | 9 |
| container_start_page | 0 |
| container_title | Journal of Geophysical Research: Oceans |
| container_volume | 125 |
| description | <jats:title>Abstract</jats:title><jats:p>The Amundsen Sea has the highest thinning rates of ice shelves in Antarctica. This imbalance is caused by changes in ocean melting induced by warm Circumpolar Deep Water (CDW) intrusions. The resulting changing freshwater balance could affect the on‐shelf currents and mixing. However, a clear understanding of the sources and sinks of freshwater in the region is lacking. Here we use a model of the Amundsen Sea, with passive freshwater tracers, to investigate the relative magnitudes and spatial distributions of the different freshwater components. In the surface layer and as a depth average, all freshwater tracer concentrations are of comparable magnitude, though on a depth average, sea ice and ice shelf are largest. The total freshwater tracer distribution is similar to that of the ice‐shelf tracer field. This implies a potential for ice‐shelf meltwater feedbacks, whereby abundant ice‐shelf meltwater alters the ocean circulation and stratification, affecting melting. Ice‐shelf and sea‐ice freshwater fluxes have the largest interannual variability. The effect of including grounded icebergs and iceberg freshwater flux are studied in detail. The presence of icebergs increases CDW intrusions that reach the base of ice shelves. This suggests another possible feedback mechanism, whereby more icebergs induce greater ice‐shelf melting and hence more icebergs. However, the strength of this potential feedback is dependent on poorly constrained sea‐ice model parameters. These results imply that poorly constrained parameters relating to the ocean freshwater balance, such as those relating to icebergs and sea ice, impact predictions for melting of the West Antarctic Ice Sheet.</jats:p> |
| doi_str_mv | 10.1029/2020jc016305 |
| facet_avail | Online, Free |
| finc_class_facet | Chemie und Pharmazie, Allgemeine Naturwissenschaft, Geologie und Paläontologie, Geographie, Physik, Technik |
| format | ElectronicArticle |
| format_de105 | Article, E-Article |
| format_de14 | Article, E-Article |
| format_de15 | Article, E-Article |
| format_de520 | Article, E-Article |
| format_de540 | Article, E-Article |
| format_dech1 | Article, E-Article |
| format_ded117 | Article, E-Article |
| format_degla1 | E-Article |
| format_del152 | Buch |
| format_del189 | Article, E-Article |
| format_dezi4 | Article |
| format_dezwi2 | Article, E-Article |
| format_finc | Article, E-Article |
| format_nrw | Article, E-Article |
| geogr_code | not assigned |
| geogr_code_person | not assigned |
| id | ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTAyOS8yMDIwamMwMTYzMDU |
| imprint | American Geophysical Union (AGU), 2020 |
| imprint_str_mv | American Geophysical Union (AGU), 2020 |
| institution | DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1, DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-Zwi2, DE-D161 |
| issn | 2169-9275, 2169-9291 |
| issn_str_mv | 2169-9275, 2169-9291 |
| language | English |
| last_indexed | 2024-03-01T16:37:46.109Z |
| match_str | bett2020theimpactoftheamundsenseafreshwaterbalanceonoceanmeltingofthewestantarcticicesheet |
| mega_collection | American Geophysical Union (AGU) (CrossRef) |
| physical | |
| publishDate | 2020 |
| publishDateSort | 2020 |
| publisher | American Geophysical Union (AGU) |
| record_format | ai |
| recordtype | ai |
| series | Journal of Geophysical Research: Oceans |
| source_id | 49 |
| spelling | Bett, David T. Holland, Paul R. Naveira Garabato, Alberto C. Jenkins, Adrian Dutrieux, Pierre Kimura, Satoshi Fleming, Andrew 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/10.1029/2020jc016305 <jats:title>Abstract</jats:title><jats:p>The Amundsen Sea has the highest thinning rates of ice shelves in Antarctica. This imbalance is caused by changes in ocean melting induced by warm Circumpolar Deep Water (CDW) intrusions. The resulting changing freshwater balance could affect the on‐shelf currents and mixing. However, a clear understanding of the sources and sinks of freshwater in the region is lacking. Here we use a model of the Amundsen Sea, with passive freshwater tracers, to investigate the relative magnitudes and spatial distributions of the different freshwater components. In the surface layer and as a depth average, all freshwater tracer concentrations are of comparable magnitude, though on a depth average, sea ice and ice shelf are largest. The total freshwater tracer distribution is similar to that of the ice‐shelf tracer field. This implies a potential for ice‐shelf meltwater feedbacks, whereby abundant ice‐shelf meltwater alters the ocean circulation and stratification, affecting melting. Ice‐shelf and sea‐ice freshwater fluxes have the largest interannual variability. The effect of including grounded icebergs and iceberg freshwater flux are studied in detail. The presence of icebergs increases CDW intrusions that reach the base of ice shelves. This suggests another possible feedback mechanism, whereby more icebergs induce greater ice‐shelf melting and hence more icebergs. However, the strength of this potential feedback is dependent on poorly constrained sea‐ice model parameters. These results imply that poorly constrained parameters relating to the ocean freshwater balance, such as those relating to icebergs and sea ice, impact predictions for melting of the West Antarctic Ice Sheet.</jats:p> The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet Journal of Geophysical Research: Oceans |
| spellingShingle | Bett, David T., Holland, Paul R., Naveira Garabato, Alberto C., Jenkins, Adrian, Dutrieux, Pierre, Kimura, Satoshi, Fleming, Andrew, Journal of Geophysical Research: Oceans, The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet, Earth and Planetary Sciences (miscellaneous), Space and Planetary Science, Geochemistry and Petrology, Geophysics, Oceanography |
| title | The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet |
| title_full | The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet |
| title_fullStr | The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet |
| title_full_unstemmed | The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet |
| title_short | The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet |
| title_sort | the impact of the amundsen sea freshwater balance on ocean melting of the west antarctic ice sheet |
| title_unstemmed | The Impact of the Amundsen Sea Freshwater Balance on Ocean Melting of the West Antarctic Ice Sheet |
| topic | Earth and Planetary Sciences (miscellaneous), Space and Planetary Science, Geochemistry and Petrology, Geophysics, Oceanography |
| url | http://dx.doi.org/10.1029/2020jc016305 |