Land Ice Freshwater Budget of the Arctic and North Atlantic Oceans. Part I: Data, Methods and Results

Publication Date:
2018-02-21
Publisher:
Wiley-Blackwell
Print ISSN:
0148-0227
Topics:
Geosciences
Physics
Published by:
http://www.wiley.com/wiley-blackwell
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autor J.L. Bamber, A.J. Tedstone, M. D. King, I. M. Howat, E. M. Enderlin, M. R. van den Broeke, B. Noel
beschreibung The freshwater budget of the Arctic and sub-polar North Atlantic Oceans has been changing due, primarily, to increased river runoff, declining sea ice and enhanced melting of Arctic land ice. Since the mid 1990s this latter component has experienced a pronounced increase. We use a combination of satellite observations of glacier flow speed and regional climate modeling to reconstruct the land ice freshwater flux from the Greenland ice sheet and Arctic glaciers and ice caps for the period 1958-2016. The cumulative freshwater flux anomaly exceeded 6300±316 km 3 by 2016. This is roughly twice the estimate of a previous analysis that did not include glaciers and ice caps outside of Greenland and which extended only to 2010. From 2010 onward, the total freshwater flux is about 1300 km 3 /yr, equivalent to 0.04 Sv, which is roughly 40% of the estimated total runoff to the Arctic for the same time period. Not all of this flux will reach areas of deep convection or Arctic and Sub-Arctic seas. We note, however, that the largest freshwater flux anomalies, grouped by ocean basin, are located in Baffin Bay and Davis Strait. The land ice freshwater flux displays a strong seasonal cycle with summer time values typically around five times larger than the annual mean. This will be important for understanding the impact of these fluxes on fjord circulation, stratification, and the biogeochemistry of, and nutrient delivery to, coastal waters.
citation_standardnr 6170143
datenlieferant ipn_articles
feed_copyright American Geophysical Union (AGU)
feed_copyright_url http://www.agu.org/
feed_id 7529
feed_publisher Wiley-Blackwell
feed_publisher_url http://www.wiley.com/wiley-blackwell
insertion_date 2018-02-21
journalissn 0148-0227
publikationsjahr_anzeige 2018
publikationsjahr_facette 2018
publikationsjahr_intervall 7984:2015-2019
publikationsjahr_sort 2018
publisher Wiley-Blackwell
quelle Journal of Geophysical Research JGR - Oceans
relation http://onlinelibrary.wiley.com/resolve/doi?DOI=10.1002%2F2017JC013605
search_space articles
shingle_author_1 J.L. Bamber, A.J. Tedstone, M. D. King, I. M. Howat, E. M. Enderlin, M. R. van den Broeke, B. Noel
shingle_author_2 J.L. Bamber, A.J. Tedstone, M. D. King, I. M. Howat, E. M. Enderlin, M. R. van den Broeke, B. Noel
shingle_author_3 J.L. Bamber, A.J. Tedstone, M. D. King, I. M. Howat, E. M. Enderlin, M. R. van den Broeke, B. Noel
shingle_author_4 J.L. Bamber, A.J. Tedstone, M. D. King, I. M. Howat, E. M. Enderlin, M. R. van den Broeke, B. Noel
shingle_catch_all_1 Land Ice Freshwater Budget of the Arctic and North Atlantic Oceans. Part I: Data, Methods and Results
The freshwater budget of the Arctic and sub-polar North Atlantic Oceans has been changing due, primarily, to increased river runoff, declining sea ice and enhanced melting of Arctic land ice. Since the mid 1990s this latter component has experienced a pronounced increase. We use a combination of satellite observations of glacier flow speed and regional climate modeling to reconstruct the land ice freshwater flux from the Greenland ice sheet and Arctic glaciers and ice caps for the period 1958-2016. The cumulative freshwater flux anomaly exceeded 6300±316 km 3 by 2016. This is roughly twice the estimate of a previous analysis that did not include glaciers and ice caps outside of Greenland and which extended only to 2010. From 2010 onward, the total freshwater flux is about 1300 km 3 /yr, equivalent to 0.04 Sv, which is roughly 40% of the estimated total runoff to the Arctic for the same time period. Not all of this flux will reach areas of deep convection or Arctic and Sub-Arctic seas. We note, however, that the largest freshwater flux anomalies, grouped by ocean basin, are located in Baffin Bay and Davis Strait. The land ice freshwater flux displays a strong seasonal cycle with summer time values typically around five times larger than the annual mean. This will be important for understanding the impact of these fluxes on fjord circulation, stratification, and the biogeochemistry of, and nutrient delivery to, coastal waters.
J.L. Bamber, A.J. Tedstone, M. D. King, I. M. Howat, E. M. Enderlin, M. R. van den Broeke, B. Noel
Wiley-Blackwell
0148-0227
01480227
shingle_catch_all_2 Land Ice Freshwater Budget of the Arctic and North Atlantic Oceans. Part I: Data, Methods and Results
The freshwater budget of the Arctic and sub-polar North Atlantic Oceans has been changing due, primarily, to increased river runoff, declining sea ice and enhanced melting of Arctic land ice. Since the mid 1990s this latter component has experienced a pronounced increase. We use a combination of satellite observations of glacier flow speed and regional climate modeling to reconstruct the land ice freshwater flux from the Greenland ice sheet and Arctic glaciers and ice caps for the period 1958-2016. The cumulative freshwater flux anomaly exceeded 6300±316 km 3 by 2016. This is roughly twice the estimate of a previous analysis that did not include glaciers and ice caps outside of Greenland and which extended only to 2010. From 2010 onward, the total freshwater flux is about 1300 km 3 /yr, equivalent to 0.04 Sv, which is roughly 40% of the estimated total runoff to the Arctic for the same time period. Not all of this flux will reach areas of deep convection or Arctic and Sub-Arctic seas. We note, however, that the largest freshwater flux anomalies, grouped by ocean basin, are located in Baffin Bay and Davis Strait. The land ice freshwater flux displays a strong seasonal cycle with summer time values typically around five times larger than the annual mean. This will be important for understanding the impact of these fluxes on fjord circulation, stratification, and the biogeochemistry of, and nutrient delivery to, coastal waters.
J.L. Bamber, A.J. Tedstone, M. D. King, I. M. Howat, E. M. Enderlin, M. R. van den Broeke, B. Noel
Wiley-Blackwell
0148-0227
01480227
shingle_catch_all_3 Land Ice Freshwater Budget of the Arctic and North Atlantic Oceans. Part I: Data, Methods and Results
The freshwater budget of the Arctic and sub-polar North Atlantic Oceans has been changing due, primarily, to increased river runoff, declining sea ice and enhanced melting of Arctic land ice. Since the mid 1990s this latter component has experienced a pronounced increase. We use a combination of satellite observations of glacier flow speed and regional climate modeling to reconstruct the land ice freshwater flux from the Greenland ice sheet and Arctic glaciers and ice caps for the period 1958-2016. The cumulative freshwater flux anomaly exceeded 6300±316 km 3 by 2016. This is roughly twice the estimate of a previous analysis that did not include glaciers and ice caps outside of Greenland and which extended only to 2010. From 2010 onward, the total freshwater flux is about 1300 km 3 /yr, equivalent to 0.04 Sv, which is roughly 40% of the estimated total runoff to the Arctic for the same time period. Not all of this flux will reach areas of deep convection or Arctic and Sub-Arctic seas. We note, however, that the largest freshwater flux anomalies, grouped by ocean basin, are located in Baffin Bay and Davis Strait. The land ice freshwater flux displays a strong seasonal cycle with summer time values typically around five times larger than the annual mean. This will be important for understanding the impact of these fluxes on fjord circulation, stratification, and the biogeochemistry of, and nutrient delivery to, coastal waters.
J.L. Bamber, A.J. Tedstone, M. D. King, I. M. Howat, E. M. Enderlin, M. R. van den Broeke, B. Noel
Wiley-Blackwell
0148-0227
01480227
shingle_catch_all_4 Land Ice Freshwater Budget of the Arctic and North Atlantic Oceans. Part I: Data, Methods and Results
The freshwater budget of the Arctic and sub-polar North Atlantic Oceans has been changing due, primarily, to increased river runoff, declining sea ice and enhanced melting of Arctic land ice. Since the mid 1990s this latter component has experienced a pronounced increase. We use a combination of satellite observations of glacier flow speed and regional climate modeling to reconstruct the land ice freshwater flux from the Greenland ice sheet and Arctic glaciers and ice caps for the period 1958-2016. The cumulative freshwater flux anomaly exceeded 6300±316 km 3 by 2016. This is roughly twice the estimate of a previous analysis that did not include glaciers and ice caps outside of Greenland and which extended only to 2010. From 2010 onward, the total freshwater flux is about 1300 km 3 /yr, equivalent to 0.04 Sv, which is roughly 40% of the estimated total runoff to the Arctic for the same time period. Not all of this flux will reach areas of deep convection or Arctic and Sub-Arctic seas. We note, however, that the largest freshwater flux anomalies, grouped by ocean basin, are located in Baffin Bay and Davis Strait. The land ice freshwater flux displays a strong seasonal cycle with summer time values typically around five times larger than the annual mean. This will be important for understanding the impact of these fluxes on fjord circulation, stratification, and the biogeochemistry of, and nutrient delivery to, coastal waters.
J.L. Bamber, A.J. Tedstone, M. D. King, I. M. Howat, E. M. Enderlin, M. R. van den Broeke, B. Noel
Wiley-Blackwell
0148-0227
01480227
shingle_title_1 Land Ice Freshwater Budget of the Arctic and North Atlantic Oceans. Part I: Data, Methods and Results
shingle_title_2 Land Ice Freshwater Budget of the Arctic and North Atlantic Oceans. Part I: Data, Methods and Results
shingle_title_3 Land Ice Freshwater Budget of the Arctic and North Atlantic Oceans. Part I: Data, Methods and Results
shingle_title_4 Land Ice Freshwater Budget of the Arctic and North Atlantic Oceans. Part I: Data, Methods and Results
timestamp 2025-06-30T23:32:52.283Z
titel Land Ice Freshwater Budget of the Arctic and North Atlantic Oceans. Part I: Data, Methods and Results
titel_suche Land Ice Freshwater Budget of the Arctic and North Atlantic Oceans. Part I: Data, Methods and Results
topic TE-TZ
U
uid ipn_articles_6170143