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    Coherent Resonant Millennial-Scale Climate Oscillations Triggered by Massive Meltwater Pulses

    Source: Journal of Climate:;2003:;volume( 016 ):;issue: 015::page 2569
    Author:
    Timmermann, Axel
    ,
    Gildor, Hezi
    ,
    Schulz, Michael
    ,
    Tziperman, Eli
    DOI: 10.1175/1520-0442(2003)016<2569:CRMCOT>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The role of mean and stochastic freshwater forcing on the generation of millennial-scale climate variability in the North Atlantic is studied using a low-order coupled atmosphere?ocean?sea ice model. It is shown that millennial-scale oscillations can be excited stochastically, when the North Atlantic Ocean is fresh enough. This finding is used in order to interpret the aftermath of massive iceberg surges (Heinrich events) in the glacial North Atlantic, which are characterized by an excitation of Dansgaard?Oeschger events. Based on model results, it is hypothesized that Heinrich events trigger Dansgaard?Oeschger cycles and that furthermore the occurrence of Heinrich events is dependent on the accumulated climatic effect of a series of Dansgaard?Oeschger events. This scenario leads to a coupled ocean?ice sheet oscillation that shares many similarities with the Bond cycle. Further sensitivity experiments reveal that the timescale of the oscillations can be decomposed into stochastic, linear, and nonlinear deterministic components. A schematic bifurcation diagram is used to compare theoretical results with paleoclimatic data.
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      Coherent Resonant Millennial-Scale Climate Oscillations Triggered by Massive Meltwater Pulses

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4204312
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    • Journal of Climate

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    contributor authorTimmermann, Axel
    contributor authorGildor, Hezi
    contributor authorSchulz, Michael
    contributor authorTziperman, Eli
    date accessioned2017-06-09T16:12:28Z
    date available2017-06-09T16:12:28Z
    date copyright2003/08/01
    date issued2003
    identifier issn0894-8755
    identifier otherams-6332.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4204312
    description abstractThe role of mean and stochastic freshwater forcing on the generation of millennial-scale climate variability in the North Atlantic is studied using a low-order coupled atmosphere?ocean?sea ice model. It is shown that millennial-scale oscillations can be excited stochastically, when the North Atlantic Ocean is fresh enough. This finding is used in order to interpret the aftermath of massive iceberg surges (Heinrich events) in the glacial North Atlantic, which are characterized by an excitation of Dansgaard?Oeschger events. Based on model results, it is hypothesized that Heinrich events trigger Dansgaard?Oeschger cycles and that furthermore the occurrence of Heinrich events is dependent on the accumulated climatic effect of a series of Dansgaard?Oeschger events. This scenario leads to a coupled ocean?ice sheet oscillation that shares many similarities with the Bond cycle. Further sensitivity experiments reveal that the timescale of the oscillations can be decomposed into stochastic, linear, and nonlinear deterministic components. A schematic bifurcation diagram is used to compare theoretical results with paleoclimatic data.
    publisherAmerican Meteorological Society
    titleCoherent Resonant Millennial-Scale Climate Oscillations Triggered by Massive Meltwater Pulses
    typeJournal Paper
    journal volume16
    journal issue15
    journal titleJournal of Climate
    identifier doi10.1175/1520-0442(2003)016<2569:CRMCOT>2.0.CO;2
    journal fristpage2569
    journal lastpage2585
    treeJournal of Climate:;2003:;volume( 016 ):;issue: 015
    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
    yabeshDSpacePersian