Temporal and regional variability of Arctic sea-ice coverage from satellite data
نویسندگان
چکیده
منابع مشابه
30-Year satellite record reveals contrasting Arctic and Antarctic decadal sea ice variability
[1] A 30-year satellite record of sea ice extents derived mostly from satellite microwave radiometer observations reveals that the Arctic sea ice extent decreased by 0.30 ± 0.03 10 km/10 yr from 1972 through 2002, but by 0.36 ± 0.05 10km/10yr from 1979 through 2002, indicating an acceleration of 20% in the rate of decrease. In contrast, the Antarctic sea ice extent decreased dramatically over t...
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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 trendsmore in line with the high-magnitude negativeArctic tr...
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Satellite altimeters have been used to monitor Arctic sea ice thickness since the early 2000s. In order to estimate sea ice thickness from satellite altimeter data, leads (i.e., cracks between ice floes) should first be identified for the calculation of sea ice freeboard. In this study, we proposed novel approaches for lead detection using two machine learning algorithms: decision trees and ran...
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The use of temporal mixture analysis (TMA) for creating a long-term baseline, or environmental ‘‘normal’’ is described. TMA is a promising analysis method derived from the hyperspectral image processing technique of spectral mixture analysis (SMA). TMA is algebraically identical to SMA, except that it is applied to temporal spectra rather than to electromagnetic spectra. TMA has particular pote...
متن کاملDecadal to seasonal variability of Arctic sea ice albedo
[1] A controlling factor in the seasonal and climatological evolution of the sea ice cover is its albedo a. Here we analyze Arctic data from the Advanced Very High Resolution Radiometer (AVHRR) Polar Pathfinder and assess the seasonality and variability of broadband albedo from a 23 year daily record. We produce a histogram of daily albedo over ice covered regions in which the principal albedo ...
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ژورنال
عنوان ژورنال: Annals of Glaciology
سال: 2017
ISSN: 0260-3055,1727-5644
DOI: 10.1017/aog.2017.32