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Analysis on the Morphological Characteristics of Arctic Leads Based on Satellite Imageries
Pages: 8-13
Year: Issue:  2
Journal: Journal of Ocean Technology

Keyword:  satellite imagerymorphological characteristics of leadsChukchi SeaBeaufort Sea;
Abstract: As global warming progresses, the Arctic sea ice area is gradually decreasing, with ice thickness becoming thiner. The more fragile sea ice influenced by the waves is conducive to the lead formation process which contributes to Arctic passage navigation. Moreover, the lead is one of the most important channels through which the air and the sea exchange heat and momentum. Therefore, the analysis on the morphological characteristics of the lead is significant for research of the momentum and heat balance in the Arctic and prediction of the navigation in the Arctic passage under the pretext of global warming. The distribution characteristics of the lead orientation, lead length and the lead spacing near the Chukchi and Beaufort Seas are analyzed in September based on Landsat8 imageries with the Hilditch Skeleton Method. The research results show that the distribution of the lead orientation is between 74° and 114°, but the length and spacing of the lead vary remarkably, ranging from 2 km to 3 km and from 50 m to 220 m, respectively. The lead length has more discrepancies among different images, compared with the spacing and the orientation.
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