Parent Layer: Remote Sensing

Name: Sentinel_1_12_day_Median_VV_Coherence_c

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Description: We have included a 100 m resolution mosaic of Sentinel-1 12-daily median coherence image. This mosaic was generated from 12 daily pairs of all the Sentinel-1 images acquired over the study area in the summer (June-August) of 2019. The source data is accessible at: https://asf.alaska.edu/datasets/derived/global-seasonal-sentinel-1-interferometric-coherence-and-backscatter-dataset/. Radar coherence is a measure that is sensitive to surface changes (dunes activity, vegetation, construction). The dunes have low coherence values and appear in dark shades in the provided coherence image. This dataset offers a unique perspective on the slower, cumulative changes affecting dune landscapes by providing median coherence measurements at 12-day repeat intervals, specifically during the summer months. It is invaluable for studying the broader patterns of dune migration, seasonal variations in sand deposition, and the long-term impacts of climate change on desertification processes.

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