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    Simulation of the Wind-Forced Near-Surface Circulation in Knight Inlet: A Parameterization of the Roughness Length

    Source: Journal of Physical Oceanography:;1999:;Volume( 029 ):;issue: 006::page 1363
    Author:
    Stacey, Michael W.
    DOI: 10.1175/1520-0485(1999)029<1363:SOTWFN>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Month-long observations of along-channel velocity made close to the surface of Knight Inlet are used with a numerical model to estimate the roughness length z0 on the water side of the air?sea interface. In analogy with a very common parameterization for z0 on the air side of the air?sea interface, z0 is parameterized in the numerical model as z0 = au2?/g where u? = (τ/?)1/2 is the friction velocity, g is the acceleration due to gravity, τ is the wind stress, ? is the density of water, and a is an empirical constant. It is found that a ≈ O(105) for the dataset from Knight Inlet, a value four orders of magnitude larger than the value commonly used to estimate z0 on the air side of the air?sea interface. When compared to empirical estimates of the significant wave height Hs, it is found that z0 ≈ O(Hs). Further evidence is provided that a numerical model that uses the Mellor?Yamada level 2.5 turbulence closure scheme can simulate the near-surface, wind-forced circulation quite well.
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      Simulation of the Wind-Forced Near-Surface Circulation in Knight Inlet: A Parameterization of the Roughness Length

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4166233
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    contributor authorStacey, Michael W.
    date accessioned2017-06-09T14:53:30Z
    date available2017-06-09T14:53:30Z
    date copyright1999/06/01
    date issued1999
    identifier issn0022-3670
    identifier otherams-29049.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4166233
    description abstractMonth-long observations of along-channel velocity made close to the surface of Knight Inlet are used with a numerical model to estimate the roughness length z0 on the water side of the air?sea interface. In analogy with a very common parameterization for z0 on the air side of the air?sea interface, z0 is parameterized in the numerical model as z0 = au2?/g where u? = (τ/?)1/2 is the friction velocity, g is the acceleration due to gravity, τ is the wind stress, ? is the density of water, and a is an empirical constant. It is found that a ≈ O(105) for the dataset from Knight Inlet, a value four orders of magnitude larger than the value commonly used to estimate z0 on the air side of the air?sea interface. When compared to empirical estimates of the significant wave height Hs, it is found that z0 ≈ O(Hs). Further evidence is provided that a numerical model that uses the Mellor?Yamada level 2.5 turbulence closure scheme can simulate the near-surface, wind-forced circulation quite well.
    publisherAmerican Meteorological Society
    titleSimulation of the Wind-Forced Near-Surface Circulation in Knight Inlet: A Parameterization of the Roughness Length
    typeJournal Paper
    journal volume29
    journal issue6
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/1520-0485(1999)029<1363:SOTWFN>2.0.CO;2
    journal fristpage1363
    journal lastpage1367
    treeJournal of Physical Oceanography:;1999:;Volume( 029 ):;issue: 006
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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