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US Phenology / Drought Monitoring

Select Bibliography:

Brown, J.F., 2010, Drought Monitoring with VegDRI: U.S. Geological Survey Fact Sheet 2010-3114, 2p. http://pubs.usgs.gov/fs/2010/3114

Wardlow, B.D., Tadesse, T., Brown, J.F., Callahan, C., Swain, S., and Hunt, E., 2012, The Vegetation Drought Response Index (VegDRI): An integration of satellite, climate, and biophysical data, in Wardlow, B.D. and others, eds., Remote sensing for drought: Innovative monitoring approaches: CRC Press/Taylor & Francis, Boca Raton, FL, p. 51-74.

Pervez, M.S. and Brown, J.F., 2010, Mapping irrigated lands at 250-m scale by merging MODIS data and national agricultural statistics, Remote Sensing, 2(10), 2388-2412; doi:10.3390/rs2102388.

Vegetation Dynamics

The Vegetation Drought Response Index, or VegDRI, is a weekly hybrid drought monitoring and mapping tool that integrates satellite observations of vegetation status and climate data with information on land cover, soil characteristics, and other environmental factors.
The Vegetation Drought Response Index, or VegDRI, is a weekly hybrid drought monitoring and mapping
tool that integrates satellite observations of vegetation status and climate data with information on
land cover, soil characteristics, and other environmental factors.
This project addresses the identification, monitoring, and understanding of broad climate-related events (i.e., phenological phenomena and drought). Specific objectives include providing early warning of anomalous events or adverse impacts, tracking variability and identifying trends, assessing and understanding causes and consequences, and operational implementation of products. We advance remote sensing imagery, products, and services for the above purposes. Several project services, a) a suite of national geospatial phenological indicators and b) a near-real time national indicator of drought stress on vegetation (Vegetation Drought Response Index), are produced regularly and provided openly though the project website.

Human populations, and the ecosystems they depend on, are increasingly vulnerable to a variety of pressures as a consequence of environmental change driven by both natural and anthropogenic processes. Phenology, or the tracking of dynamic biological events, is said to provide some of the most compelling evidence of climate change on Earth’s ecosystems. In addition, preparedness, early warning, and emergency response require geographic characterization of current conditions, hazard potential, and vulnerability to assess risk and/or impact. Research is needed to develop and implement geographic monitoring and modeling methods to track variability and identify trends, reduce environmental degradation, and mitigate loss of life and property.

Principal Investigator: Jesslyn Brown, jbrown@usgs.gov, EROS Center, Sioux Falls, SD

Project Team: Gretchen Meier, Ross Evelsizer, Danny Howard, Shahriar Pervez

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