Detecting Melt Pond Onset on Landfast Arctic Sea Ice Using a Dual C-Band Satellite Approach ...

The presence of melt ponds on the surface of Arctic sea ice affects its albedo, thermal properties, and overall melting rate, and thus, the detection of melt pond onset is of significant importance for understanding the Arctic's changing climate. This study investigates the utility of a novel m...

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Bibliographic Details
Main Author: Maknun, Syeda Shahida
Format: Article in Journal/Newspaper
Language:English
Published: Graduate Studies 2024
Subjects:
Canadian Arctic Archipelago
Sea ice
Melt ponds
Pond onset
Co-polarized ratio
Sentinel-1
ASCAT
Dual-sensor C-band
Snow
Remote Sensing
Physical Geography
Arctic
albedo
Arctic Archipelago
Online Access:https://dx.doi.org/10.11575/prism/46563
https://prism.ucalgary.ca/handle/1880/118967
Description
Summary:The presence of melt ponds on the surface of Arctic sea ice affects its albedo, thermal properties, and overall melting rate, and thus, the detection of melt pond onset is of significant importance for understanding the Arctic's changing climate. This study investigates the utility of a novel method for detecting the onset of melt ponds on sea ice using a satellite-based, dual-sensor C-band approach, whereby Sentinel-1 provides horizontally polarized (HH) data and Advanced SCATterometer (ASCAT) provides vertically polarized (VV) data. The co-polarized ratio (VV/HH) is used to detect the presence of melt ponds on landfast sea ice in the Canadian Arctic Archipelago in 2017 and 2018. ERA-5 air temperature, and wind speed reanalysis datasets are used to establish the VV/HH threshold for pond onset detection which have been further validated by Landsat-8 reflectance. Co-polarized ratio threshold of 3 standard deviations from late winter season (April) acquisitions is used for assessing pond onset detection ...

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