North American Phenology from Satellite and PhenoCam Fusion, 2019-2020

2019 and 2020 data provides a reference of land surface phenology at 30-meter resolution for 78 regions across North America. The dataset was created by fusing Harmonized Landsat 8 and Sentinel-2 (HLS) data with near-surface PhenoCam time-series imagery. It includes synthetic gap-free EVI2 time series and four key phenological transition dates with an accuracy of five days or better.

Use Cases

• Analyzing the timing of greenup onset, maturity onset, senescence onset, and dormancy onset across diverse North American ecosystems.
• Validating satellite-derived phenology models using high-frequency near-surface PhenoCam Green Chromatic Coordinate (GCC) observations.
• Studying vegetation response to climate using the 3-day synthetic gap-free EVI2 time series.
• Comparing phenological patterns across 78 distinct 10x10 km regions spanning a wide range of ecological and climatic conditions.

Strengths

• Provides four key phenological transition dates with a reported accuracy of five days or less.
• Covers 78 distinct 10x10 km regions across a wide range of North American ecological and climatic zones.
• Fuses satellite data (HLS) with high-frequency, near-surface PhenoCam observations to create gap-free time series.

Limitations

• Conflicting last updated dates: one source states 2026-03-12, another states 2020-12-31.
• Specific row counts, column names, and dataset size are not provided by any source.
• Spatial coverage is limited to the 78 selected regions in North America for the years 2019-2020.

Provenance

Source

ORNL_CLOUD

Collection Method

Data derived by fusing Harmonized Landsat 8 and Sentinel-2 (HLS) observations with PhenoCam time series using a Spatiotemporal Shape Matching Model (SSMM) and a hybrid piecewise logistic model (HPLM).

Time Range

2019-2020

Freshness

2026-03-12 22:40:08.969245

Geography

78 regions of 10 x 10 km2 across a wide range of ecological and climatic regions in North America (CONUS and Alaska).