Spatiotemporal dependence of Antarctic sea ice variability to dynamic and thermodynamic forcing: a coupled ocean–sea ice model study
Spatiotemporal dependence of Antarctic sea ice variability to dynamic and thermodynamic forcing: a coupled ocean–sea ice model study
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南极海冰变化对动态和热力学强迫的时空依赖性：海洋-海冰耦合模型研究
DOI：
10.1007/s00382-018-4348-3
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发表时间：
2018
期刊：
影响因子：
4.6
通讯作者：
H. Hasumi
中科院分区：
文献类型：
--
作者：
K. Kusahara;Guy D. Williams;R. Massom;P. Reid;H. Hasumi
自1979年以来，卫星推算的南极海冰范围略有上升，但具有很强的时间和区域变化性--人们对其驱动因素知之甚少。在这里，我们进行数值实验与现实的大气表面边界条件驱动的环南极海洋海冰冰架模型，以研究在观测到的南极海冰变化的时间和空间模式的因素。该模型成功地再现了观测到的海冰总面积的季节性和年际变化以及1979-2014年海冰集中和季节性（前进和后退的天数和实际结冰天数）的时空格局。进行敏感性实验，其中忽略风应力或热力表面强迫的年际变化，描绘他们的贡献南极海冰场。结果表明：（1）热力强迫对海冰面积的年际变化和季节变化起着关键作用，（2）只有在罗斯海，风应力才成为海冰面积变化的主要驱动力，（3）热力强迫主要控制海冰前进时间的年际变化，而风应力主要控制海冰后退时间;（4）虽然风应力和热力强迫对海冰总体积的变化都有贡献，但风应力对近海岸带海冰体积的变化起主导作用。
Satellite-derived Antarctic sea ice extent has displayed a slight upward since 1979, but with strong temporal and regional variability—the drivers of which are poorly understood. Here, we conduct numerical experiments with a circum-Antarctic ocean–sea ice–ice shelf model driven by realistic atmospheric surface boundary conditions to examine the factors responsible for the temporal and spatial patterns in observed Antarctic sea ice variability. The model successfully reproduces observed seasonal and interannual variability in total sea ice extent and the temporal/spatial patterns of sea ice concentration and seasonality (days of advance and retreat and actual ice days) for 1979–2014. Sensitivity experiments are performed, in which the interannual variability in wind stress or thermodynamic surface forcing is ignored, to delineate their contributions to Antarctic sea ice fields. The results demonstrate that: (1) thermodynamic forcing plays a key role in driving interannual variability in sea ice extent and seasonality in most Antarctic sectors; (2) only in the Ross Sea the wind stress does become the main driver of sea ice extent variability; (3) thermodynamic forcing largely regulates interannual variability in the timing of sea ice advance, while wind stress largely controls the timing of the sea ice retreat; and (4) although both wind stress and thermodynamic forcing contribute to variability in total sea ice volume, the wind stress plays a dominant role in regulating sea ice volume variability in the near-coastal zone.
影响因子：
4.6
作者：
J. Turner;J. Hosking;G. Marshall;T. Phillips;T. Bracegirdle
通讯作者：
J. Turner;J. Hosking;G. Marshall;T. Phillips;T. Bracegirdle
影响因子：
8
作者：
Raphael, M. N.;Marshall, G. J.;Hobbs, W. R.
通讯作者：
Hobbs, W. R.