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- 2016
1978~2014南极海冰边缘线长度时间序列变化
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Abstract:
基于SMMR和SSM/I海冰索引数据集，建立并分析了1978-11至2014-12月36 a的南极海冰边缘线长度时间序列。南极冰缘线长度增长速度为19.54±16.31 km/a（p<0.05）。每年海冰范围从3月开始增长，9月达到峰值然后下降；冰缘线长度也呈现稳定的周期性变化，在3~8月缓慢增长，继而略微下降，11月开始迅速增长，12月到达峰值后迅速下降。通常冰缘线长度最大值出现在12月，最小值在3月。冰缘线长度的变化与海冰范围和海冰形状FRAC指数相关，在3月、11月、12月，冰缘线长度的变化趋势与海冰形状FRAC指数一致，与海冰范围相反。在其他月份冰缘线长度的变化趋势则与海冰范围相同，与海冰形状FRAC指数相反。在5个地理分区中，印度洋区、罗斯海区冰缘线长度呈正增长趋势，别林斯高晋海区呈明显负增长趋势，西太平洋区、威德尔海区变化趋势不明显。5个地理分区的冰缘线长度都只在个别月份呈现明显的趋势变化，大部分时间没有明显趋势
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