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Remote Sensing Phenology

Phenology is the study of plant and animal life cycles in relation to the seasons. EROS maintains a set of nine annual phenological metrics for the conterminous United States, all curated from satellite data. Taken together, the metrics represent a powerful tool for documenting life cycle trends and the impacts of climate change on ecosystems.

News

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Remote Sensing Phenology Metrics for 2020 Released

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Remote Sensing Phenology Metrics for 2019 Released

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Remote Sensing Phenology Metrics for 2018 Released

Publications

Optimizing a remote sensing production efficiency model for macro-scale GPP and yield estimation in agroecosystems

Earth observation data are increasingly used to provide consistent eco-physiological information over large areas through time. Production efficiency models (PEMs) estimate Gross Primary Production (GPP) as a function of the fraction of photosynthetically active radiation absorbed by the canopy, which is derived from Earth observation. GPP can be summed over the growing season and adjusted by a cr

Exploring relationships of spring green-up to moisture and temperature across Wyoming, U.S.A

Vegetation green-up signals the timing of available nutritious plants and shrubs providing high-quality forage for ungulates. In this study, we characterized spatial and temporal patterns of spring phenology and explored how they were related to preceding temperature and moisture conditions. We tested correlations between late winter weather and indicators of the onset and the length of the spring

Multi-year data from satellite- and ground-based sensors show details and scale matter in assessing climate’s effects on wetland surface water, amphibians, and landscape conditions

Long-term, interdisciplinary studies of relations between climate and ecological conditions on wetland-upland landscapes have been lacking, especially studies integrated across scales meaningful for adaptive resource management. We collected data in situ at individual wetlands, and via satellite for surrounding 4-km2 landscape blocks, to assess relations between annual weather dynamics, snow durat

Science

Spring Arriving at EROS

Temperatures are slowly getting warmer and it looks like our long winter is coming to an end. Volunteers at the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center will soon mobilize to monitor and observe the timing of nature's calendar (events like bud burst, flowering, and leaf drop) in conjunction with the USA National Phenology Network. This seasonal activity...
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Spring Arriving at EROS

Temperatures are slowly getting warmer and it looks like our long winter is coming to an end. Volunteers at the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center will soon mobilize to monitor and observe the timing of nature's calendar (events like bud burst, flowering, and leaf drop) in conjunction with the USA National Phenology Network. This seasonal activity...
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EROS Phenocam - Live

In September 2014, the USGS Earth Resources Observation and Science (EROS) Center established a near-ground automated digital camera and joined over 100 other core sites in the PhenoCam Network. Following the protocols of the network, the USGS-EROS camera regularly captures digital imagery and data used to better understand vegetation cycles. As part of a scientific network of automated cameras...
link

EROS Phenocam - Live

In September 2014, the USGS Earth Resources Observation and Science (EROS) Center established a near-ground automated digital camera and joined over 100 other core sites in the PhenoCam Network. Following the protocols of the network, the USGS-EROS camera regularly captures digital imagery and data used to better understand vegetation cycles. As part of a scientific network of automated cameras...
Learn More

Validation

Documenting the effectiveness of the phenology metrics is difficult given the current scarcity of ground verification data at the appropriate scale (i.e., vegetation-canopy phenology). However, current efforts by the National Phenology Network to build and organize ground observation databases will go far toward addressing these shortcomings. In the meantime, two examples of coincident ground...
link

Validation

Documenting the effectiveness of the phenology metrics is difficult given the current scarcity of ground verification data at the appropriate scale (i.e., vegetation-canopy phenology). However, current efforts by the National Phenology Network to build and organize ground observation databases will go far toward addressing these shortcomings. In the meantime, two examples of coincident ground...
Learn More