Remotely sensed measurements of interannual variability in the timing and magnitude of Alaskan North Slope primary productivity
- Alaska Science Center, Anchorage, AK (United States)
Accurate detection and modeling of the influences of global climate change on existing habitats require measurement instruments that can integrate the combined effects of external forces on vegetation at a spatial scale adequate for resolving the influences of climate. Advanced very high resolution radiometers (AVHRR) aboard NOAA polar orbiting satellites were used to develop a GIS of primary productivity indices (NDVI) for the growing season over the North slope of Alaska for 1990-1992. Plots of NDVI through the growing season as the response variable, differences were detected between years, watersheds, and ecoregions. An early onset of growing conditions in 1990 appeared to be responsible for high overall primary productivity, while the late onset of growing conditions in 1992 appears to have limited productivity. Differences in annual integrated NDVI appear to be related to length of season not peak productivity levels which were similar in all years. Continuing research will include extending the timeline and testing for linkages between climatic variables and NDVI patterns.
- OSTI ID:
- 107093
- Report Number(s):
- CONF-9507129--
- Journal Information:
- Bulletin of the Ecological Society of America, Journal Name: Bulletin of the Ecological Society of America Journal Issue: 3 Vol. 76; ISSN BECLAG; ISSN 0012-9623
- Country of Publication:
- United States
- Language:
- English
Similar Records
Assessment of regional biomass-soil relationships using vegetation indexes
Monitoring phenological changes in lake ice as a robust indicator of regional climate change using the AVHRR