The seasonality of Antarctic sea ice trends
The seasonality of Antarctic sea ice trends
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DOI：
10.1002/2014gl060172
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发表时间：
2014-06-28
影响因子：
5.2
通讯作者：
Holland, Paul R.
中科院分区：
文献类型：
--
作者：
Holland, Paul R.
南极海冰的面积总体上增长微弱，这是相反的区域趋势的残余。这项研究考虑了它们的季节性模式。除了传统的冰浓度和总冰面积，这些量的时间导数进行了研究（“强化”和“扩展”，分别）。这对趋势的归属至关重要，因为强迫的变化直接影响冰面积的变化（而不是冰面积）。各种区域趋势都对总体增长作出了重大贡献。威德尔和阿蒙森-别林斯高晋地区的趋势在幅度和季节性方面得到了补偿。秋季的最大浓度趋势实际上是由春季的强化趋势造成的。在大多数地方，秋季强化趋势与秋季浓度趋势直接相反，似乎是冰和海洋反馈的结果。春季趋势与风的趋势是一致的，但需要进一步研究春季融化季节的变化，以揭示南极海冰的增加。
Antarctic sea ice is experiencing a weak overall increase in area that is the residual of opposing regional trends. This study considers their seasonal pattern. In addition to traditional ice concentration and total ice area, temporal derivatives of these quantities are investigated ("intensification" and "expansion," respectively). This is crucial to the attribution of trends, since changes in forcing directly affect ice areal change (rather than ice area). Diverse regional trends all contribute significantly to the overall increase. Trends in the Weddell and Amundsen-Bellingshausen regions compensate in magnitude and seasonality. The largest concentration trends, in autumn, are actually caused by intensification trends during spring. Autumn intensification trends directly oppose autumn concentration trends in most places, seemingly as a result of ice and ocean feedbacks. Springtime trends are reconcilable with wind trends, but further study of changes during the spring melting season is required to unravel the Antarctic sea ice increase.