Blar i forfatter Norges arktiske universitetsmuseum "Tømmervik, Hans"

Viser treff 1-2 av 2

    • Alpine garden plants from six continents show high vulnerability to ice encasement 

      Bjerke, Jarle W.; Elvebakk, Arve; Tømmervik, Hans (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-27)
      Icy surfaces impose challenges for northern societies, wildlife and agriculture. However, there have been relatively few studies of the impacts of anoxic ground ice on non-agricultural plants. During the winter of 2009–2010, an extreme winter warming event led to thick ground-ice layer development in the world’s northernmost botanical garden in Tromsø, in subarctic Norway, due to much rain on ...

    • Changes in Onset of Vegetation Growth on Svalbard, 2000–2020 

      Karlsen, Stein Rune; Elvebakk, Arve; Tømmervik, Hans; Belda, Santiago; Stendardi, Laura (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-15)
      The global temperature is increasing, and this is affecting the vegetation phenology in many parts of the world. The most prominent changes occur at northern latitudes such as our study area, which is Svalbard, located between 76300N and 80500N. A cloud-free time series of MODIS-NDVI data was processed. The dataset was interpolated to daily data during the 2000–2020 period with a 231.65 m pixel ...