Historical trend analysis of phenology dates across the Western US from 1982 to 2016

These data represent key phenology trends across the western United States from 1982-2016. Using two remote sensing datasets, CMGLSP and VIPPHEN-EVI2, trends were calculated for four phenology variables: Start of Season (SOS), Peak Instantaneous Rate of Green-Up Date (PIRGd), Peak of Season (POS), and End of Season (EOS). The Theil-Sen slope was applied to the phenology metrics, as well as the standard deviation, to give an indication of how phenology dates, as well as variations, are changing throughout time. The Mann-Kendall test was also applied to give an indication of trend significance. Lastly, we include the mean and standard deviation of each metric across the time period.

Data and Resources

Field Value
accessLevel public
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identifier 9663cb8b-288f-47ab-bdea-5c9ac4777610
metadata_type geospatial
modified 2021-04-26
old-spatial {"type": "Polygon", "coordinates": [[[-124.75, 31.35], [-102.05, 31.35], [-102.05, 49.0], [-124.75, 49.0], [-124.75, 31.35]]]}
publisher Climate Adaptation Science Centers
resource-type Dataset
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spatial {"type": "Polygon", "coordinates": [[[-124.75, 31.35], [-102.05, 31.35], [-102.05, 49.0], [-124.75, 49.0], [-124.75, 31.35]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • arizona
  • california
  • ckan
  • colorado
  • end-of-season
  • geo
  • geoss
  • green-up
  • idaho
  • montana
  • national
  • nevada
  • new-mexico
  • north-america
  • oregon
  • peak-instantaneous-rate-of-green-up-date
  • peak-of-season
  • phenology
  • start-of-season
  • trend
  • united-states
  • usgs-605e1916d34ec5fa65ee5d09
  • utah
  • washington
  • wyoming
isopen False
license_id notspecified
license_title License not specified
maintainer U.S. Geological Survey (Point of Contact)
maintainer_email tgraves@usgs.gov
metadata_created 2025-11-20T18:10:00.983476
metadata_modified 2025-11-20T18:10:00.983480
notes These data represent key phenology trends across the western United States from 1982-2016. Using two remote sensing datasets, CMGLSP and VIPPHEN-EVI2, trends were calculated for four phenology variables: Start of Season (SOS), Peak Instantaneous Rate of Green-Up Date (PIRGd), Peak of Season (POS), and End of Season (EOS). The Theil-Sen slope was applied to the phenology metrics, as well as the standard deviation, to give an indication of how phenology dates, as well as variations, are changing throughout time. The Mann-Kendall test was also applied to give an indication of trend significance. Lastly, we include the mean and standard deviation of each metric across the time period.
num_resources 2
num_tags 27
title Historical trend analysis of phenology dates across the Western US from 1982 to 2016