Declining Arctic Cryosphere Extent: A Two-Decade Assessment Using Sentinel-1 SAR and NASA NSIDC Climate Indicators
Kata Kunci:
Cryosphere decline, Arctic sea ice, remote sensing, climatological reports, climate change.Abstrak
This study examines the long-term decline of the Arctic cryosphere by integrating remote-sensing analysis with authoritative climatological reports, providing a comprehensive and validated assessment of sea-ice changes over the past two decades. Multi-temporal observations derived from Sentinel-1 SAR imagery were combined with metrics reported in the NASA NSIDC Annual Arctic Sea Ice Reports, NOAA Arctic Report Cards, and EUMETSAT Polar Ice Monitoring Summaries to ensure robust cross-verification of spatial and temporal trends. The methodological framework included radiometric calibration, terrain correction, feature extraction, and statistical harmonization to align satellite-derived indicators with report-based climate datasets. Findings reveal a persistent reduction in sea-ice extent, progressive thinning of ice layers, and increasingly irregular seasonal anomalies, collectively reflecting the intensifying influence of atmospheric and oceanic warming across polar regions. These converging lines of evidence reinforce the consensus on accelerated Arctic cryosphere degradation and emphasize the growing need for strengthened monitoring systems, improved modelling tools, and more assertive mitigation strategies. Overall, the study demonstrates that integrating satellite observations with official climatological reporting significantly enhances the precision and reliability of cryosphere assessments, supporting more informed policy responses to global climate change.
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Hak Cipta (c) 2025 Sahal Hanafi, Muhammad Irfan Fatkhun Niam (Author)
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