HR: 0800h
AN: B51B-0373
TI: A New National MODIS-Derived Phenology Data Set Every 16 Days, 2002 through 2006
AU: * Hargrove, W W
EM: hnw@geobabble.org
AF: USDA Forest Service, Eastern Forest Threat Assessment Center, Southern Research Station, 200 WT Weaver Blvd., Asheville, NC 28804-3454, United States
AU: Spruce, J
EM: joseph.p.spruce@nasa.gov
AF: Science Systems & Applications, Inc., Bldg. 1105, Rm. 117G, Stennis Space Center, MS 39529, United States
AU: Gasser, G
EM: gerald.e.gasser@lmco.com
AF: Lockheed Martin Mission Services, Bldg 5100, Stennis Space Center, MS 39529, United States
AU: Hoffman, F M
EM: forrest@climatemodeling.org
AF: Computational Earth Sciences Group, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6016, United States
AU: Lee, D
EM: dclee@fs.fed.us
AF: USDA Forest Service, Eastern Forest Threat Assessment Center, Southern Research Station, 200 WT Weaver Blvd., Asheville, NC 28804-3454, United States
AB: A new national phenology data set has been developed, comprised of a series of seamless 231m national maps, every 16 days from 2001 through 2006. The data set was developed jointly by the Eastern Forest Environmental Threat Assessment Center (EFETAC) of the USDA Forest Service, and contractors of the NASA Stennis Space Center. The data are available now for dissemination and use. The first half of the National Phenology Data Set is the cumulative area under the NDVI curve since Jan 1, and increases monotonically every 16 days until the end of the year. These cumulative data values "latch" in the event of clouds or snow, remaining at the value when we last saw this cell. The second half is a set of diagnostic parameters fit to the annual NDVI function. The spring minimum, the 20% rise, the 80% rise, the leaf-on maximum, the 80% fall, the 20% fall, and the trailing fall minimum are determined for each map cell. For each parameter, we produce both a national map of the NDVI value, and a map of the day-of-year when that NDVI value was reached. Length of growing season, as the difference between the spring and fall 20% DOYs, and date of middle of growing season can be mapped as well. The new dataset has permitted the development of a set of national phonological ecoregions, and has also proven useful for mapping Gypsy Moth defoliation, simultaneously delineating the aftermath of three Gulf Coast hurricanes, and quantifying suburban/ex-urban development surrounding metro Atlanta.
UR: http://seychelles.nemac.unca.edu/website/phenology
DE: 0434 Data sets
DE: 0439 Ecosystems, structure and dynamics (4815)
DE: 0476 Plant ecology (1851)
DE: 0480 Remote sensing
DE: 1632 Land cover change
SC: Biogeosciences [B]
MN: 2008 Fall Meeting