• Temperature and vegetation seasonality diminishment over northern lands 

      Xu, L.; Myneni, R.B.; Chapin III, F.S.; Callaghan, T.V.; Pinzon, J.E.; Tucker, Compton J.; Zhu, Z.; Bi, J.; Ciais, P.; Tømmervik, Hans; Euskirchen, E.S.; Forbes, B. C.; Piao, S.L.; Anderson, B.T.; Ganguly, S.; Nemani, R.R.; Goetz, S.J.; Beck, P.S.A.; Bunn, A.G.; Cao, C.; Stroeve, J.C. (Journal article; Peer reviewed, 2013)
      Global temperature is increasing, especially over Northern lands (>50 N), owing to positive feedbacks. As this increase is most pronounced in winter, temperature seasonality (ST)—conventionally defined as the difference ...
    • Vole and lemming activity observed from space 

      Olofsson, Johan; Tømmervik, Hans; Callaghan, T.V. (Journal article; Peer reviewed, 2012)
      Predicting the impacts of present global warming requires an understanding of the factors controlling plant biomass and production. The extent to which they are controlled by bottom-up drivers such as climate, nutrient and ...