Inter-comparison of melt pond products from optical satellite imagery
Inter-comparison of melt pond products from optical satellite imagery
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DOI：
10.1016/j.rse.2023.113920
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发表时间：
2024-02
影响因子：
13.5
通讯作者：
Sanggyun Lee;Julienne Stroeve;Melinda Webster;Niels Fuchs;D. Perovich
中科院分区：
文献类型：
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作者：
Sanggyun Lee;Julienne Stroeve;Melinda Webster;Niels Fuchs;D. Perovich
鉴于融化池对夏季海冰能量平衡的重要性，已作出若干努力，利用卫星数据开发泛北极数据集。在这里，我们相互比较三个融化池的数据集，依赖于多频光学卫星数据。早在融化季节，这三个数据集有类似的空间格局，在融化池分数，但这种协议减弱融化季节的进展，尽管相对较高的年际相关性之间的数据产品的池塘分数。大多数数据集并没有表现出增加的趋势，从2002年到2011年，尽管整体北极变暖和更早的融化开始。进一步的比较，对更高的分辨率的光学数据，以评估相对精度。这些比较揭示了从粗分辨率卫星数据中检索融化池的挑战，以及需要更好地区分铅，小型开放水域和融化池。最后，我们评估融化池的数据集作为冰的类型的函数，以及它们与表面的相关性如何。正如预期的那样，融化池分数与表面反射率呈负相关，尽管相关性的强度因产品和地区而异。总的来说，第一年的冰比多年的冰有更大的融化池分数。
Given the importance that melt ponds have on the energy balance of summer sea ice, there have been several efforts to develop pan-Arctic datasets using satellite data. Here we intercompare three melt pond data sets that rely on multi-frequency optical satellite data. Early in the melt season, the three data sets have similar spatial patterns in melt pond fraction, but this agreement weakens as the melt season progresses despite relatively high interannual correlations in pond fractions between the data products. Most of the data sets do not exhibit trends towards increased melt pond fractions from 2002 to 2011 despite overall Arctic warming and earlier melt onset. Further comparisons are made against higher resolution optical data to assess relative accuracy. These comparisons reveal the challenges in retrieving melt ponds from coarse resolution satellite data, and the need to better discriminate between leads, small open water areas and melt ponds. Finally, we assess melt pond data sets as a function of ice type and how well they correlate with surface albedo. As expected, melt pond fractions are negatively correlated with surface albedo, though the strength of the correlation varies across products and regions. Overall, first-year ice has larger melt pond fractions than multi-year ice.