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    Recent Variations of Sea Ice and Air Temperature in High Latitudes

    Source: Bulletin of the American Meteorological Society:;1993:;volume( 074 ):;issue: 001::page 33
    Author:
    Chapman, William L.
    ,
    Walsh, John E.
    DOI: 10.1175/1520-0477(1993)074<0033:RVOSIA>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Feedbacks resulting from the retreat of sea ice and snow contribute to the polar amplification of the greenhouse warming projected by global climate models. A gridded sea-ice database, for which the record length is now approaching four decades for the Arctic and two decades for the Antarctic, is summarized here. The sea-ice fluctuations derived from the dataset are characterized by 1) temporal scales of several seasons to several years and 2) spatial scales of 30°?180° of longitude. The ice data are examined in conjunction with air temperature data for evidence of recent climate change in the polar regions. The arctic sea-ice variations over the past several decades are compatible with the corresponding air temperatures, which show a distinct warming that is strongest over northern land areas during the winter and spring. The temperature trends over the subarctic seas are smaller and even negative in the southern Greenland region. Statistically significant decreases of the summer extent of arctic ice are apparent in the sea-ice data, and new summer minima have been achieved three times in the past 15 years. There is no significant trend of ice extent in the Arctic during winter or in the Antarctic during any season. The seasonal and geographical changes of sea-ice coverage are consistent with the more recent greenhouse experiments performed with coupled atmosphere?ocean models.
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      Recent Variations of Sea Ice and Air Temperature in High Latitudes

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4161111
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    contributor authorChapman, William L.
    contributor authorWalsh, John E.
    date accessioned2017-06-09T14:41:09Z
    date available2017-06-09T14:41:09Z
    date copyright1993/01/01
    date issued1993
    identifier issn0003-0007
    identifier otherams-24439.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4161111
    description abstractFeedbacks resulting from the retreat of sea ice and snow contribute to the polar amplification of the greenhouse warming projected by global climate models. A gridded sea-ice database, for which the record length is now approaching four decades for the Arctic and two decades for the Antarctic, is summarized here. The sea-ice fluctuations derived from the dataset are characterized by 1) temporal scales of several seasons to several years and 2) spatial scales of 30°?180° of longitude. The ice data are examined in conjunction with air temperature data for evidence of recent climate change in the polar regions. The arctic sea-ice variations over the past several decades are compatible with the corresponding air temperatures, which show a distinct warming that is strongest over northern land areas during the winter and spring. The temperature trends over the subarctic seas are smaller and even negative in the southern Greenland region. Statistically significant decreases of the summer extent of arctic ice are apparent in the sea-ice data, and new summer minima have been achieved three times in the past 15 years. There is no significant trend of ice extent in the Arctic during winter or in the Antarctic during any season. The seasonal and geographical changes of sea-ice coverage are consistent with the more recent greenhouse experiments performed with coupled atmosphere?ocean models.
    publisherAmerican Meteorological Society
    titleRecent Variations of Sea Ice and Air Temperature in High Latitudes
    typeJournal Paper
    journal volume74
    journal issue1
    journal titleBulletin of the American Meteorological Society
    identifier doi10.1175/1520-0477(1993)074<0033:RVOSIA>2.0.CO;2
    journal fristpage33
    journal lastpage47
    treeBulletin of the American Meteorological Society:;1993:;volume( 074 ):;issue: 001
    contenttypeFulltext
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