TY - GEN T1 - Snowmelt Timing Maps Derived from MODIS for North America, Version 2, 2001-2018 AU - O'Leary III, D. AU - Hall, D.K. AU - Medler, M. AU - Matthews, R. AU - Flower, A. DO - 10.3334/ORNLDAAC/1712 UR - https://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1712 AB - This data set provides snowmelt timing maps (STMs), cloud interference maps, and a map with the count of calculated snowmelt timing values for North America. The STMs are based on the Moderate Resolution Imaging Spectroradiometer (MODIS) standard 8-day composite snow-cover product MOD10A2 collection 6 for the period 2001-01-01 to 2018-12-31. The STMs were created by conducting a time-series analysis of the MOD10A2 snow maps to identify the DOY of snowmelt on a per-pixel basis. Snowmelt timing (no-snow) was defined as a snow-free reading following two consecutive snow-present readings for a given 500-m pixel. The count of STM values is also reported, which represents the number of years on record in the STMs from 2001-2018. KW - CRYOSPHERE > SNOW/ICE > SNOW MELT KW - TERRESTRIAL HYDROSPHERE > SNOW/ICE > SNOW MELT KW - Terra > MODIS KW - mapped data KW - snowpack KW - cloud interference KW - snow-covered pixels KW - MOD10A2 Version 6 KW - Normalized Difference Snow Index (NDSI) KW - time-series analysis PY - 2020 PB - ORNL Distributed Active Archive Center LA - en SN - https://daac.ornl.gov/cgi-bin/dataset_lister.pl?p=5 ER -