Thule, NW Greenland Site name Thule, NW Greenland   Name Heidi Steltzer and Jeff Welker Title Research Scientists Organization Natural Resource Ecology Laboratory and University of Alaska, Anchorage URL none   Type of optical sampling field reflectance Type of flux measurements CO2 flux using chambers   Latitude 76° 33' N Longitude 68 ° 34' W Type of ecosystem High Arctic, prostrate dwarf shrub herb tundra Starting data June 2004 Additional comments The measurements of spectral reflectance and ecosystem CO2 exchange are being conducted in a climate change experiment.  The experiment includes multiple levels of warming and a 50% increase in summer precipitation.  Measurements are made throughout the growing season since 2004.  We have also developed an NDVI-LAI model for this ecosystem (Steltzer and Welker 2006, Ecology 87:2765-2772).