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 USGS:605e1916d34ec5fa65ee5d09
metadata_type geospatial
modified 20210426
old-spatial -124.75, 31.35, -102.05, 49
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash b5cc206312bbb7e78acae5f4e7eca944bab26eba
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spatial {"type": "Polygon", "coordinates": [[[-124.75, 31.35], [-124.75, 49], [ -102.05, 49], [ -102.05, 31.35], [-124.75, 31.35]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • arizona
  • biota
  • 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 Tabitha Graves
maintainer_email tgraves@usgs.gov
metadata_created 2025-11-22T13:38:45.076257
metadata_modified 2025-11-22T13:38:45.076262
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 28
title Historical trend analysis of phenology dates across the Western US from 1982 to 2016