Global Sea Ice Coverage from Satellite Data: Annual Cycle and 35-Yr Trends
Global Sea Ice Coverage from Satellite Data: Annual Cycle and 35-Yr Trends
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DOI：
10.1175/jcli-d-14-00605.1
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发表时间：
2014-12-01
影响因子：
4.9
通讯作者：
Parkinson, Claire L.
中科院分区：
文献类型：
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作者：
Parkinson, Claire L.
由卫星获得的成熟的北极和南极海冰范围结合起来，形成了1979-2013年35年间海冰范围及其变化的全球图景。结果表明，全球海冰年循环更符合南极的高幅度年循环，而不是北极的低幅度年循环，但趋势更符合北极的高幅度负趋势，而不是南极的低幅度正趋势。在全球范围内，每月海冰面积在2月最小，通常在10月或11月最大。在35年期间，12个月的趋势均为负，其中9月的趋势幅度最大，为-68 200 +/- 10 500 km(2) yr(-1)（-2.62% +/- 0.40% 10年（-1）），年平均趋势为-35 000 +/- 5900km(2) yr(-1)（21.47% +/- 0.25% 10年（-1））。
Well-established satellite-derived Arctic and Antarctic sea ice extents are combined to create the global picture of sea ice extents and their changes over the 35-yr period 1979-2013. Results yield a global annual sea ice cycle more in line with the high-amplitude Antarctic annual cycle than the lower-amplitude Arctic annual cycle but trends more in line with the high-magnitude negative Arctic trends than the lower-magnitude positive Antarctic trends. Globally, monthly sea ice extent reaches a minimum in February and a maximum generally in October or November. All 12 months show negative trends over the 35-yr period, with the largest magnitude monthly trend being the September trend, at -68 200 +/- 10 500 km(2) yr(-1) (-2.62% +/- 0.40% decade(-1)), and the yearly average trend being -35 000 +/- 5900km(2) yr(-1) (21.47% +/- 0.25% decade(-1)).