YaBeSH Engineering and Technology Library

    • Journals
    • PaperQuest
    • YSE Standards
    • YaBeSH
    • Login
    View Item 
    •   YE&T Library
    • AMS
    • Journal of Physical Oceanography
    • View Item
    •   YE&T Library
    • AMS
    • Journal of Physical Oceanography
    • View Item
    • All Fields
    • Source Title
    • Year
    • Publisher
    • Title
    • Subject
    • Author
    • DOI
    • ISBN
    Advanced Search
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Archive

    Estimates of Eddy Heat Flux Crossing the Antarctic Circumpolar Current from Observations in Drake Passage

    Source: Journal of Physical Oceanography:;2016:;Volume( 046 ):;issue: 007::page 2103
    Author:
    Watts, D. Randolph
    ,
    Tracey, Karen L.
    ,
    Donohue, Kathleen A.
    ,
    Chereskin, Teresa K.
    DOI: 10.1175/JPO-D-16-0029.1
    Publisher: American Meteorological Society
    Abstract: he 4-yr measurements by current- and pressure-recording inverted echo sounders in Drake Passage produced statistically stable eddy heat flux estimates. Horizontal currents in the Antarctic Circumpolar Current (ACC) turn with depth when a depth-independent geostrophic current crosses the upper baroclinic zone. The dynamically important divergent component of eddy heat flux is calculated. Whereas full eddy heat fluxes differ greatly in magnitude and direction at neighboring locations within the local dynamics array (LDA), the divergent eddy heat fluxes are poleward almost everywhere. Case studies illustrate baroclinic instability events that cause meanders to grow rapidly. In the southern passage, where eddy variability is weak, heat fluxes are weak and not statistically significant. Vertical profiles of heat flux are surface intensified with ~50% above 1000 m and uniformly distributed with depth below. Summing poleward transient eddy heat transport across the LDA of ?0.010 ± 0.005 PW with the stationary meander contribution of ?0.004 ± 0.001 PW yields ?0.013 ± 0.005 PW. A comparison metric, ?0.4 PW, represents the total oceanic heat loss to the atmosphere south of 60°S. Summed along the circumpolar ACC path, if the LDA heat flux occurred at six ?hot spots? spanning similar or longer path segments, this could account for 20%?70% of the metric, that is, up to ?0.28 PW. The balance of ocean poleward heat transport along the remaining ACC path should come from weak eddy heat fluxes plus mean cross-front temperature transports. Alternatively, the metric ?0.4 PW, having large uncertainty, may be high.
    • Download: (4.641Mb)
    • Show Full MetaData Hide Full MetaData
    • Item Order
    • Go To Publisher
    • Price: 5000 Rial
    • Statistics

      Estimates of Eddy Heat Flux Crossing the Antarctic Circumpolar Current from Observations in Drake Passage

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4227172
    Collections
    • Journal of Physical Oceanography

    Show full item record

    contributor authorWatts, D. Randolph
    contributor authorTracey, Karen L.
    contributor authorDonohue, Kathleen A.
    contributor authorChereskin, Teresa K.
    date accessioned2017-06-09T17:22:01Z
    date available2017-06-09T17:22:01Z
    date copyright2016/07/01
    date issued2016
    identifier issn0022-3670
    identifier otherams-83897.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4227172
    description abstracthe 4-yr measurements by current- and pressure-recording inverted echo sounders in Drake Passage produced statistically stable eddy heat flux estimates. Horizontal currents in the Antarctic Circumpolar Current (ACC) turn with depth when a depth-independent geostrophic current crosses the upper baroclinic zone. The dynamically important divergent component of eddy heat flux is calculated. Whereas full eddy heat fluxes differ greatly in magnitude and direction at neighboring locations within the local dynamics array (LDA), the divergent eddy heat fluxes are poleward almost everywhere. Case studies illustrate baroclinic instability events that cause meanders to grow rapidly. In the southern passage, where eddy variability is weak, heat fluxes are weak and not statistically significant. Vertical profiles of heat flux are surface intensified with ~50% above 1000 m and uniformly distributed with depth below. Summing poleward transient eddy heat transport across the LDA of ?0.010 ± 0.005 PW with the stationary meander contribution of ?0.004 ± 0.001 PW yields ?0.013 ± 0.005 PW. A comparison metric, ?0.4 PW, represents the total oceanic heat loss to the atmosphere south of 60°S. Summed along the circumpolar ACC path, if the LDA heat flux occurred at six ?hot spots? spanning similar or longer path segments, this could account for 20%?70% of the metric, that is, up to ?0.28 PW. The balance of ocean poleward heat transport along the remaining ACC path should come from weak eddy heat fluxes plus mean cross-front temperature transports. Alternatively, the metric ?0.4 PW, having large uncertainty, may be high.
    publisherAmerican Meteorological Society
    titleEstimates of Eddy Heat Flux Crossing the Antarctic Circumpolar Current from Observations in Drake Passage
    typeJournal Paper
    journal volume46
    journal issue7
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/JPO-D-16-0029.1
    journal fristpage2103
    journal lastpage2122
    treeJournal of Physical Oceanography:;2016:;Volume( 046 ):;issue: 007
    contenttypeFulltext
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian
     
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian