کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5754922 1621202 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of satellite remote sensing albedo retrievals over the ablation area of the southwestern Greenland ice sheet
ترجمه فارسی عنوان
ارزیابی بازیابی آلبدو از طریق سنجش از دور ماهواره ای در منطقه تخلیه یخچال جنوب غربی گرینلند
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات کامپیوتر در علوم زمین
چکیده انگلیسی
Furthermore, we demonstrate that single 'point-to-pixel' methods alone are insufficient in characterizing and validating the variation of surface albedo displayed in the lower ablation area. This is true because the distribution of in situ data deviations from MODIS albedo show a substantial range, with the average values for the 10th and 90th percentiles being − 0.30 and 0.43 across all bands. Thus, if only single point is taken for ground validation, and is randomly selected from either distribution tails, the error would appear to be considerable. Given the need for multiple in-situ points, concurrent albedo measurements derived from existing AWSs, (low-flying vehicles (airborne or unmanned) and high-resolution imagery (WV-2)) are needed to resolve high sub-pixel variability in the ablation zone, and thus, further improve our characterization of Greenland's surface albedo.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Remote Sensing of Environment - Volume 198, 1 September 2017, Pages 115-125
نویسندگان
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