Temporal and Spatial Variability of Great Lakes Ice Cover, 1973–2010*
Temporal and Spatial Variability of Great Lakes Ice Cover, 1973–2010*
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DOI：
10.1175/2011jcli4066.1
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发表时间：
2012-02
影响因子：
4.9
通讯作者：
Jia Wang;X. Bai;Haoguo Hu;A. Clites;M. Colton;B. Lofgren
中科院分区：
文献类型：
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作者：
Jia Wang;X. Bai;Haoguo Hu;A. Clites;M. Colton;B. Lofgren
摘要在这项研究中，时间和空间变化的冰盖在五大湖调查使用历史卫星测量1973年至2010年。为所有湖泊（包括圣克莱尔湖）构建了冰盖的季节性循环。在季节周期中发现的一个独特特征是标准偏差（即，变化）的冰盖大于气候平均值为每个湖泊。这表明，五大湖的冰盖经历了巨大的变化，以应对主要的自然气候强迫，并具有很差的可预测性。谱分析表明，湖冰具有约8年和约4年的准十年周期和年际周期。从1973年到现在，所有湖泊的冰层覆盖率都有明显的下降趋势，其中安大略湖最大，伊利湖和圣克莱尔湖最小。在整个38年的记录中，湖冰的总损失从圣克莱尔湖的37%（最少）到安大略的88%（最多）不等。孩子...
AbstractIn this study, temporal and spatial variability of ice cover in the Great Lakes are investigated using historical satellite measurements from 1973 to 2010. The seasonal cycle of ice cover was constructed for all the lakes, including Lake St. Clair. A unique feature found in the seasonal cycle is that the standard deviations (i.e., variability) of ice cover are larger than the climatological means for each lake. This indicates that Great Lakes ice cover experiences large variability in response to predominant natural climate forcing and has poor predictability. Spectral analysis shows that lake ice has both quasi-decadal and interannual periodicities of ~8 and ~4 yr. There was a significant downward trend in ice coverage from 1973 to the present for all of the lakes, with Lake Ontario having the largest, and Lakes Erie and St. Clair having the smallest. The translated total loss in lake ice over the entire 38-yr record varies from 37% in Lake St. Clair (least) to 88% in Lake Ontario (most). The tot...