Recent Declines in Warming and Vegetation Greening Trends over Pan-Arctic Tundra. - Uma S. Bhatt; Donald A. Walker; Martha K. Raynolds; Peter A. Bieniek; Howard E. Epstein; Josefino C. Comiso; Jorge E. Pinzón; Compton J. Tucker; Igor V. Polyakov (Remote. Sens., 2013)

Ground-Based Hyperspectral Characterization of Alaska Tundra Vegetation along Environmental Gradients. - Marcel Buchhorn; Donald A. Walker; Birgit Heim; Martha K. Raynolds; Howard E. Epstein; Marcel Schwieder (Remote. Sens., 2013)