A5056648761- Climate change and permafrost
- Indigenous Studies and Ecology
- Cryospheric studies and observations
- Species Distribution and Climate Change
- Remote Sensing in Agriculture
- Botany and Plant Ecology Studies
- Lichen and fungal ecology
- Peatlands and Wetlands Ecology
- Rangeland and Wildlife Management
- Tree-ring climate responses
- Fire effects on ecosystems
- Rangeland Management and Livestock Ecology
- Geology and Paleoclimatology Research
- Atmospheric and Environmental Gas Dynamics
- Wildlife Ecology and Conservation
- Remote Sensing and LiDAR Applications
- Arctic and Antarctic ice dynamics
- Ecology and biodiversity studies
- Arctic and Russian Policy Studies
- Plant responses to elevated CO2
- Climate variability and models
- Plant Ecology and Soil Science
- Forest Ecology and Biodiversity Studies
- Plant Water Relations and Carbon Dynamics
- Soil and Water Nutrient Dynamics
Norwegian Institute for Nature Research
2016-2025
The FRAM Centre
2016-2025
NILU
2015-2024
Norwegian Polar Institute
2007
UiT The Arctic University of Norway
1984-2005
Northern Research Institute
1990-2005
Swedish Polar Research Secretariat
2005
Tromsø research foundation
2005
Abstract Global climate change is expected to shift species ranges polewards, with a risk of range contractions and population declines especially high‐Arctic species. We built distribution models for Svalbard‐nesting pink‐footed geese relate their occurrence environmental climatic variables, used the predict under warmer scenario. The most parsimonious model included mean May temperature, number frost‐free months proportion moist wet moss‐dominated vegetation in area. two variables are...
Monitoring and understanding climate-induced changes in the boreal arctic vegetation is critical to aid prognosticating their future. We used a 33 year (1982–2014) long record of satellite observations robustly assess metrics growing season (onset: SOS, end: EOS length: LOS) seasonal total gross primary productivity. Particular attention was paid evaluating accuracy these by comparing them multiple independent direct indirect productivity measures. These comparisons reveal that derived...
Summary 1. The Arctic is experiencing considerable change in climate, particularly winter, and a greater frequency of extreme climatic events expected. However, the impacts winter climate have received far less attention than season‐long summer warming. Here we report findings from observations following natural event experimental studies to show that short (<10 days) warming can cause major damage sub‐Arctic plant communities at landscape scales. 2. In observations, were assessed an...
Abstract Increased concentrations of dissolved organic carbon (DOC), often labelled “browning”, is a current trend in northern, particularly boreal, freshwaters. The browning has been attributed to the recent reduction sulphate (S) deposition during last 2 3 decades. Over century, climate and land use change have also caused an increasing vegetation cover (“greening”) this terrestrially fixed represents another potential source for export lakes rivers. impact greening on observed rivers...
The subarctic environment of northernmost Sweden has changed over the past century, particularly elements climate and cryosphere. This paper presents a unique geo-referenced record environmental ecosystem observations from area since 1913. Abiotic changes have been substantial. Vegetation include not only increases in growth range extension but also counterintuitive decreases, stability: all three possible responses. Changes species composition within major plant communities ranged between...
Abstract In recent years extreme winter warming events have been reported in arctic areas. These are characterized as extraordinarily warm weather episodes, occasionally combined with intense rainfall, causing ecological disturbance and challenges for societies infrastructure. Ground-ice formation due to rain or melting prevents ungulates from grazing, leads vegetation browning, impacts soil temperatures. The authors analyze changes frequency intensity of the Nordic region—northern Norway,...
The release of cold temperature constraints on photosynthesis has led to increased productivity (greening) in significant parts (32–39%) the Arctic, but much Arctic shows stable (57–64%) or reduced (browning, <4%). Summer drought and wildfires are best-documented drivers causing browning continental areas, factors dampening greening effect more maritime regions have remained elusive. Here we show how multiple anomalous weather events severely affected terrestrial during one water year...
Abstract Seasonality in photosynthetic activity is a critical component of seasonal carbon, water, and energy cycles the Earth system. This characteristic consequence plant's adaptive evolutionary processes to given set environmental conditions. Changing climate northern lands (>30°N) alters state climatic constraints on plant growth, therefore, changes seasonality carbon accumulation are anticipated. However, how evolved its current state, what role their variability played this process...
The migratory tundra caribou herds in North America follow decadal population cycles, and browsing from abundant could be expected to counteract the current climate-driven expansion of shrubs circumpolar biome. We demonstrate that sea ice cover Arctic Ocean has provided a strong signal for climate-induced changes on adjacent summer ranges, outperforming other climate indices explaining caribou-plant dynamics. found no evidence negative effect abundance vegetation biomass. On contrary, we...
Abstract According to some treatises, arctic and alpine sub‐biomes are ecologically similar, whereas others find them highly dissimilar. Most peculiarly, large areas of northern tundra highlands fall outside the two recent subdivisions biome. We seek an natural resolution this long‐standing far‐reaching problem. studied broad‐scale patterns in climate vegetation along gradient from Siberian via northernmost Fennoscandia habitats European middle‐latitude mountains, as well explored those...
The study focuses on vegetation changes in the Nordic mountain birch forest northern Norway, covering a period of more than 40 yr. area comprises municipalities Kautokeino and Karasjok Finnmarkskvidda; it is predominantly covered by lichen dwarf shrub vegetation. Sizes various classes were estimated use remote-sensing techniques ground surveys. A significant change cover during was registered whole area. Vegetation types dominated bilberry (Vaccinium myrtillus), wavy hair-grass (Deschampsia...
ABSTRACT Scientific studies of challenges climate change could be improved by including other sources knowledge, such as traditional ecological knowledge (TEK), in this case relating to the Sámi. This study focuses on local variations snow and ice conditions, effects first durable snow, long term changes conditions pre-requisites for understanding potential future changes. Firstly, we characterised types profiles based Sámi categories measured their density hardness. Regression analysis...
Abstract Aim The arctic forest–tundra boundary is expected to advance rapidly northwards in response climate warming. purpose of this study was: (1) analyse region‐wide changes the positions latitudinal forest line and tree since early 20th century; (2) calculate rates northward movement estimate uncertainties from different sources data; (3) how differ between two common species, Betula pubescens (downy birch) Pinus sylvestris (Scots pine); (4) place results context dynamic global...