Journal of Remote Sensing & GIS

Robert Crabtree

Publications

• Research Article
  Changes in Alaskan Tundra Ecosystems Estimated from MODIS Greenness Trends, 2000 to 2010
  Author(s): Christopher Potter*, Shuang Li and Robert CrabtreeChristopher Potter*, Shuang Li and Robert Crabtree
  
  Trends in the monthly moderate resolution Imaging Spectroradiometer (MODIS) Enhanced Vegetation Index (EVI) time-series were analyzed for tundra ecosystems of Alaska over the past decade. Results showed that 10% of all tundra-dominated areas in Alaska were detected with significant (p<0.05) positive or negative MODIS growing season EVI trends from 2000 to 2010. Nearly three-quarters of these pixel areas were detected with significant positive growing season EVI trends. This 3:1 ratio of positive to negative EVI trends was consistent across both wetland and nonwetland tundra cover categories. Ecoregions of Alaska that revealed the highest density of positive areas for tundra growing season EVI slope were along the Pacific coast, namely the western Arctic Foothills, the Seward Peninsula, and the southern coastal plain. Associations between annual temperature and moisture patterns and.. View More»
  DOI: 10.4172/2169-0049.1000107

  Abstract PDF