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Southwest Alaska remote sensing Lake ice phenology for 17 lakes and lake clusters for 2002-2016 water years

Published by National Park Service | Department of the Interior | Metadata Last Checked: January 25, 2026 | Last Modified: 2024-05-21T00:00:00Z
The need for establishing a record of lake ice phenology for Alaska’s maritime regions has been recognized by the U.S. National Park Service Southwest Alaska Network Inventory and Monitoring Program (SWAN). The lakes of the Southwest Alaska region are critical habitat to many species, including the world’s largest Sockeye Salmon fishery, and they provide livelihood to many communities through transportation, subsistence and recreational opportunities. Reed et al. (2009) used an interpretation dataset provided by the MODIS Rapid Response System (Rapidfire images) for detecting the lake ice phenology of five large freshwater lakes for 2000-2008 in southwest Alaska and established the optical properties of open water and ice in various phases of formation and break-up for the region. Rapidfire imagery products were recognized as useful due to their high temporal frequency for this location, however they can be limited by persistent cloud cover in the region. In this study, we use the methods developed by Reed et.al (2009) to establish a 15-year lake ice phenology record from water year 2002 to 2016 of 17 freshwater lakes in southwest Alaska and report the results in this data series. Reed, B.; Budde, M.; Spencer, P.; Miller, A.E. 2009. Integration of MODIS-derived metrics to assess interannual variability in snowpack, lake ice, and NDVI in southwest Alaska. Remote Sensing of Environment. 113: 1443-1452. doi:10.1016/j.rse.2008.07.020.

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