Blar i NORCE vitenarkiv på forfatter "Tømmervik, Hans"
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175 years of adaptation: North Scandinavian Sámi reindeer herding between government policies and winter climate variability (1835–2010)
Riseth, Jan Åge; Tømmervik, Hans; Bjerke, Jarle W. (Peer reviewed; Journal article, 2016)Unmanaged wild reindeer populations tend to follow cyclical behaviour, and domesticatedreindeer populations often show cyclical behaviour, too. In this contribution, we intendto use the long-term development of two areas ... -
Changes in Onset of Vegetation Growth on Svalbard, 2000–2020
Karlsen, Stein Rune; Elvebakk, Arve; Tømmervik, Hans; Belda, Santiago; Stendardi, Laura (Journal article; Peer reviewed, 2022)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 ... -
Complexity revealed in the greening of the Arctic
Myers-Smith, Isla H.; Kerby, Jeffrey T.; Phoenix, Gareth K.; Bjerke, Jarle W.; Epstein, Howard E.; Assmann, Jakob J.; John, Christian; Andreu-Hayles, Laia; Angers-Blondin, Sandra; Beck, Pieter S. A.; Berner, Logan T.; Bhatt, Uma S.; Bjorkman, Anne D.; Blok, Daan; Bryn, Anders; Christiansen, Casper Tai; Cornelissen, J. Hans C.; Cunliffe, Andrew M.; Elmendorf, Sarah C.; Forbes, Bruce C.; Goetz, Scott J.; Hollister, Robert D.; de Jong, Rogier; Loranty, Michael M.; Macias-Fauria, Marc; Maseyk, Kadmiel; Normand, Signe; Olofsson, Johan; Parker, Thomas C.; Parmentier, Frans-Jan W.; Post, Eric; Schaepman-Strub, Gabriela; Stordal, Frode; Sullivan, Patrick F.; Thomas, Haydn J.D.; Tømmervik, Hans; Treharne, Rachael; Tweedie, Craig E.; Walker, Donald A.; Wilmking, Martin; Wipf, Sonja (Peer reviewed; Journal article, 2020)As the Arctic warms, vegetation is responding, and satellite measures indicate widespread greening at high latitudes. This ‘greening of the Arctic’ is among the world’s most important large-scale ecological responses to ... -
Finnmarksvidda – kartlegging og overvåking av reinbeiter – STATUS - 2018. (1/2019)
Johansen, Bernt; Tømmervik, Hans; Bjerke, Jarle W.; Davids, Corine (Research report, 2019) -
Finnmarksvidda – kartlegging og overvåking av reinbeiter – status 2013
Johansen, Bernt; Tømmervik, Hans; Bjerke, Jarle W.; Karlsen, Stein Rune (Research report, 2014)Reindriftsforvaltningen i Alta startet i 1998 opp et program for overvåking av vår-/høst- og vinterbeitene i Indre Finnmark. Hensikten med dette programmet var å framskaffe dokumentasjon i om endringer beiteforholdene for ... -
Klimautfordringer og arealforvalting for reindrifta i Norge. Kunnskapsstatus og forslag til tiltak – eksempler fra Troms (6/2017)
Riseth, Jan Åge; Tømmervik, Hans (Research report, 2017)Fylkesmannen i Troms er i samarbeid med Miljødirektoratet og andre parter i gang med et landsomfattende prosjekt knyttet til klimaendringenes påvirkning på natur og miljø. Målet er å framskaffe ett kunnskapsgrunnlag til ... -
Multi-Sensor Analysis of Snow Seasonality and a Preliminary Assessment of SAR Backscatter Sensitivity to Arctic Vegetation: Limits and Capabilities
Stendardi, Laura; Karlsen, Stein Rune; Malnes, Eirik; Nilsen, Lennart; Tømmervik, Hans; Cooper, Elisabeth J.; Notarnicola, Claudia (Peer reviewed; Journal article, 2022)Snow melt timing and the last day of snow cover have a significant impact on vegetation phenology in the Svalbard archipelago. The aim of this study is to assess the seasonal variations of the snow using a multi-sensor ... -
SAU OG REIN - BEITEBRUK OG DRIFTSFORMER. FOR FEMUND REINBEITEDISTRIKTS ANKESAK FOR HØYESTERETT.
Tømmervik, Hans; Holand, Øystein (Report, 2018) -
SIOS’s Earth Observation (EO), Remote Sensing (RS), and operational activities in response to COVID-19
Jawak, Shridhar D.; Andersen, Bo N.; Pohjola, Veijo; Godøy, Øystein; Hübner, Christiane E.; Jennings, Inger; Ignatiuk, Dariusz; Holmen, Kim; Sivertsen, Agnar; Hann, Richard; Tømmervik, Hans; Kääb, Andreas; Błaszczyk, Małgorzata; Salzano, Roberto; Luks, Bartłomiej; Høgda, Kjell Arild; Storvold, Rune; Nilsen, Lennart; Salvatori, Rosamaria; Krishnan, Kottekkatu Padinchati; Chatterjee, Sourav; Lorentzen, Dag Arne; Erlandsson, Rasmus; Lauknes, Tom Rune; Malnes, Eirik; Karlsen, Stein Rune; Enomoto, Hiroyuki; Fjæraa, Ann Mari; Zhang, Jie; Marty, Sabine; Nygård, Knut Ove; Lihavainen, Heikki (Journal article; Peer reviewed, 2021)Svalbard Integrated Arctic Earth Observing System (SIOS) is an international partnership of research institutions studying the environment and climate in and around Svalbard. SIOS is developing an efficient observing system, ... -
Spreading or Gathering? Can Traditional Knowledge be a Resource to Tackle Reindeer Diseases Associated with Climate Change?
Riseth, Jan Åge; Tømmervik, Hans; Tryland, Morten (Peer reviewed; Journal article, 2020)This paper inquires whether reindeer herders’ traditional knowledge (TK) provides a reservoir of precaution and adaptation possibilities that may be relevant to counteract climate change. As our core example, we used the ... -
Time-series of cloud-free sentinel-2 ndvi data used in mapping the onset of growth of central spitsbergen, svalbard
Karlsen, Stein Rune; Stendardi, Laura; Tømmervik, Hans; Nilsen, Lennart; Arntzen, Ingar; Cooper, Elisabeth J. (Peer reviewed; Journal article, 2021)The Arctic is a region that is expected to experience a high increase in temperature. Changes in the timing of phenological phases, such as the onset of growth (as observed by remote sensing), is a sensitive bio-indicator ... -
Tundra greenness
Epstein, H.; Bhatt, Uma S.; Raynolds, M.; Walker, D.; Forbes, B.; Phoenix, G.; Bjerke, Jarle W.; Tømmervik, Hans; Karlsen, Stein Rune; Myneni, R.; Park, T.; Goetz, S.; Jia, G. (Other type of Report, 2018) -
Yield Estimates by a Two-Step Approach Using Hyperspectral Methods in Grasslands at High Latitudes
Murguzur, Francisco Javier Ancin; Taff, Gregory; Davids, Corine; Tømmervik, Hans; Mølmann, Jørgen; Jørgensen, Marit (Peer reviewed; Journal article, 2019)Ruminant fodder production in agricultural lands in latitudes above the Arctic Circle is constrained by short and hectic growing seasons with a 24-hour photoperiod and low growth temperatures. The use of remote sensing to ... -
Økonomiske tap for reindrifta knyttet til veganlegg på E8 Sørbotn-Laukslett og i Lavangsdalen. Tromsdalen–Mauken reinbeitedistrikt, Tromsø kommune
Riseth, Jan Åge; Tømmervik, Hans (Research report, 2022)Rapporten er et oppdrag for Statens Vegvesen, bygd på vedtatte planer og utredninger. Mandatet angir at rapporten skal være et mest mulig objektivt grunnlag for forhandlinger om minnelige løsninger mellom reinbeitedistriktet ...