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    Formulation of an Explicit-Multiple-Time-Step Time Integration Method for Use in a Global Primitive Equation Grid Model

    Source: Monthly Weather Review:;1982:;volume( 110 ):;issue: 011::page 1603
    Author:
    Chao, Winston C.
    DOI: 10.1175/1520-0493(1982)110<1603:FOAEMT>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: With appropriate modifications, a recently proposed explicit-multiple-time-step scheme (EMTSS) is incorporated into the UCLA model. In this scheme, the linearized terms in the governing equations that generate the gravity waves are split into different vertical modes. Each mode is integrated with an optimal time step, and at periodic intervals these modes are recombined. The other terms are integrated with a time step dictated by the CFL condition for low-frequency waves. This large time step requires a special modification of the advective terms in the polar region to maintain stability. Test runs for 72 h show that EMTSS is a stable, efficient and accurate scheme.
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      Formulation of an Explicit-Multiple-Time-Step Time Integration Method for Use in a Global Primitive Equation Grid Model

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    contributor authorChao, Winston C.
    date accessioned2017-06-09T16:04:03Z
    date available2017-06-09T16:04:03Z
    date copyright1982/11/01
    date issued1982
    identifier issn0027-0644
    identifier otherams-60139.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4200776
    description abstractWith appropriate modifications, a recently proposed explicit-multiple-time-step scheme (EMTSS) is incorporated into the UCLA model. In this scheme, the linearized terms in the governing equations that generate the gravity waves are split into different vertical modes. Each mode is integrated with an optimal time step, and at periodic intervals these modes are recombined. The other terms are integrated with a time step dictated by the CFL condition for low-frequency waves. This large time step requires a special modification of the advective terms in the polar region to maintain stability. Test runs for 72 h show that EMTSS is a stable, efficient and accurate scheme.
    publisherAmerican Meteorological Society
    titleFormulation of an Explicit-Multiple-Time-Step Time Integration Method for Use in a Global Primitive Equation Grid Model
    typeJournal Paper
    journal volume110
    journal issue11
    journal titleMonthly Weather Review
    identifier doi10.1175/1520-0493(1982)110<1603:FOAEMT>2.0.CO;2
    journal fristpage1603
    journal lastpage1617
    treeMonthly Weather Review:;1982:;volume( 110 ):;issue: 011
    contenttypeFulltext
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