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    Glacial Meltwater Identification in the Amundsen Sea

    Source: Journal of Physical Oceanography:;2017:;Volume( 047 ):;issue: 004::page 933
    Author:
    Biddle, Louise C.
    ,
    Heywood, Karen J.
    ,
    Kaiser, Jan
    ,
    Jenkins, Adrian
    DOI: 10.1175/JPO-D-16-0221.1
    Publisher: American Meteorological Society
    Abstract: ine Island Ice Shelf, in the Amundsen Sea, is losing mass because of warm ocean waters melting the ice from below. Tracing meltwater pathways from ice shelves is important for identifying the regions most affected by the increased input of this water type. Here, optimum multiparameter analysis is used to deduce glacial meltwater fractions from water mass characteristics (temperature, salinity, and dissolved oxygen concentrations), collected during a ship-based campaign in the eastern Amundsen Sea in February?March 2014. Using a one-dimensional ocean model, processes such as variability in the characteristics of the source water masses on shelf and biological productivity/respiration are shown to affect the calculated apparent meltwater fractions. These processes can result in a false meltwater signature, creating misleading apparent glacial meltwater pathways. An alternative glacial meltwater calculation is suggested, using a pseudo?Circumpolar Deep Water endpoint and using an artificial increase in uncertainty of the dissolved oxygen measurements. The pseudo?Circumpolar Deep Water characteristics are affected by the under ice shelf bathymetry. The glacial meltwater fractions reveal a pathway for 2014 meltwater leading to the west of Pine Island Ice Shelf, along the coastline.
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      Glacial Meltwater Identification in the Amundsen Sea

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4227300
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    contributor authorBiddle, Louise C.
    contributor authorHeywood, Karen J.
    contributor authorKaiser, Jan
    contributor authorJenkins, Adrian
    date accessioned2017-06-09T17:22:27Z
    date available2017-06-09T17:22:27Z
    date copyright2017/04/01
    date issued2017
    identifier issn0022-3670
    identifier otherams-84011.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4227300
    description abstractine Island Ice Shelf, in the Amundsen Sea, is losing mass because of warm ocean waters melting the ice from below. Tracing meltwater pathways from ice shelves is important for identifying the regions most affected by the increased input of this water type. Here, optimum multiparameter analysis is used to deduce glacial meltwater fractions from water mass characteristics (temperature, salinity, and dissolved oxygen concentrations), collected during a ship-based campaign in the eastern Amundsen Sea in February?March 2014. Using a one-dimensional ocean model, processes such as variability in the characteristics of the source water masses on shelf and biological productivity/respiration are shown to affect the calculated apparent meltwater fractions. These processes can result in a false meltwater signature, creating misleading apparent glacial meltwater pathways. An alternative glacial meltwater calculation is suggested, using a pseudo?Circumpolar Deep Water endpoint and using an artificial increase in uncertainty of the dissolved oxygen measurements. The pseudo?Circumpolar Deep Water characteristics are affected by the under ice shelf bathymetry. The glacial meltwater fractions reveal a pathway for 2014 meltwater leading to the west of Pine Island Ice Shelf, along the coastline.
    publisherAmerican Meteorological Society
    titleGlacial Meltwater Identification in the Amundsen Sea
    typeJournal Paper
    journal volume47
    journal issue4
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/JPO-D-16-0221.1
    journal fristpage933
    journal lastpage954
    treeJournal of Physical Oceanography:;2017:;Volume( 047 ):;issue: 004
    contenttypeFulltext
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