A5024742380- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Climate change and permafrost
- Environmental DNA in Biodiversity Studies
- Methane Hydrates and Related Phenomena
- Landslides and related hazards
- Peatlands and Wetlands Ecology
- Isotope Analysis in Ecology
- Arctic and Antarctic ice dynamics
- Social Acceptance of Renewable Energy
- Aquatic Ecosystems and Phytoplankton Dynamics
- Risk and Safety Analysis
- Climate variability and models
- Plant Water Relations and Carbon Dynamics
- Coastal wetland ecosystem dynamics
- Hydrology and Watershed Management Studies
- Microbial Community Ecology and Physiology
- Occupational Health and Safety Research
- Conferences and Exhibitions Management
- Marine and environmental studies
- Climate Change Communication and Perception
- Archaeology and ancient environmental studies
UiT The Arctic University of Norway
2018-2024
Centre for Arctic Gas Hydrate, Environment and Climate
2020-2024
Stockholm University
2018-2022
Posten (Norway)
2019-2021
Arctic hotspots, local areas of high biodiversity, are potential key sites for conservation biodiversity. However, there is a need improved understanding their long-term resilience. The hotspot Ringhorndalen has the highest registered diversity vascular plants in Svalbard archipelago, including several remarkable and isolated plant populations located far north normal distribution range. Here we analyze lake sediment core from sedimentary ancient DNA (sedaDNA) geochemical proxies to detect...
Understanding patterns of colonisation is important for explaining both the distribution single species and anticipating how ecosystems may respond to global warming. Insular flora be especially vulnerable because oceans represent severe dispersal barriers. Here we analyse two lake sediment cores from Iceland ancient sedimentary DNA infer Holocene vegetation development. Our lakes Torfdalsvatn Nykurvatn span last c. 12,000 cal yr BP 8600 BP, respectively. With near-centennial resolution,...
Subarctic permafrost peatlands are important soil organic carbon pools, and improved knowledge about peat properties peatland sensitivity to past climate change is essential when predicting future response a warmer associated feedback mechanisms. In this study, Holocene development dynamics of four subarctic plateaus in Finnmark, northern Norway have been investigated through detailed analyses plant macrofossils geochemical properties. Peatland inception occurred around 9800 cal. yr BP 9200...
Abstract. During the Last Glacial Period (LGP), Greenland experienced approximately 30 abrupt warming phases, known as Dansgaard–Oeschger (D–O) events, followed by cooling back to baseline glacial conditions. Studies of mean climate change across transitions reveal indistinguishable phase offsets between shifts in temperature, dust, sea salt, accumulation, and moisture source, thus preventing a comprehensive understanding “anatomy” D–O cycles (Capron et al., 2021). One aspect that has not...
The deglaciation history and Holocene environmental evolution of northern Wijdefjorden, Svalbard, are reconstructed using sediment cores acoustic data (multibeam swath bathymetry sub‐bottom profiler data). Results reveal that the fjord mouth was deglaciated prior to 14.5±0.3 cal. ka BP occurred stepwise. Biomarker analyses show rapid variations in water temperature sea ice cover during deglaciation, cold conditions Younger Dryas, followed by minimum throughout Early Holocene, until c . 7...
Arctic precipitation is predicted to increase in the coming century, due a combination of enhanced northward atmospheric moisture transport and local surface evaporation from ice-free seas. However, large model uncertainties, limited long-term observations, high spatiotemporal variability limit our understanding these mechanisms, emphasizing need for paleoclimate records changes. Here we use lipid biomarkers lake sediments reconstruct seasonality northern Spitsbergen, Svalbard. We measured...
High-latitude lakes are sensitive to climate change and store information about large-scale circulation changes catchment-integrated processes. Lakes mainly recharged by meteoric water, meaning that some lake sediment proxies may indirectly archive the stable isotopic composition of hydrogen (δ2H) oxygen (δ18O) past precipitation. Yet, despite similar precipitation input, within a region exhibit wide range values due varying influence inflow seasonality evaporation. Moreover, relative...
The response of glaciers and ice caps to past climate change provides important insight into how they will react ongoing future global warming. In Svalbard, the Holocene glacial history has been studied for many cirque valley glaciers. However, little is known about larger in Svalbard responded Late Glacial changes. Here we use lake sediment cores geophysical data from Femmilsjøen, one Svalbard's largest lakes, reconstruct Åsgardfonna Ice Cap since last deglaciation. We find that Femmilsjøen...
Abstract Sediment cores from Kløverbladvatna, a threshold lake in Wahlenbergfjorden, Nordaustlandet, Svalbard were used to reconstruct Holocene glacier fluctuations. Meltwater Etonbreen spills over the lake, only when is significantly larger than at present. Lithological logging, loss-on-ignition, ITRAX scanning and radiocarbon dating of show that Kløverbladvatna became isolated Wahlenbergfjorden c. 5.4 cal. kyr BP due glacioisostatic rebound. During Late Holocene, laminated clayey gyttja...
The deglaciation of the Svalbard-Barents Sea Ice Sheet was driven by relative sea-level rise, incursion North Atlantic waters around Spitsbergen, and increasing summer insolation. However, ice retreat interrupted asynchronous re-advances that occurred into high seas, during a period associated with warm regional elevated temperatures. Better understanding this complex style dynamic response to warming climate can serve as an important analogue for modern today's sheets. We present evidence...
Climate change is amplified in the Arctic, and establishing baseline data for its current character important. Here we present a map of geomorphology Femmilsjøen area, Spitsbergen, northern Svalbard. The regional physiography characterised by low-relief, high elevation mountain plateau, high-relief steep slopes, low-relief coastal lowlands. results indicate that glaciers were most likely warm-based erosive low terrain, whereas there are signatures colder, less ice on plateaus during Late...
Large rock slope failures are temporal processes which act to modify the landscape after glacial retreat. The failure process often shows a lag time of thousands years deglaciation, with multiple events possible. While global datasets constrain this from extensive mapping and dating paraglacial avalanches, timeline is poorly refined in northern Norway. We present case study multiphase at Skredkallen on Vanna, one group coastal islands Troms, site contains an actively deforming above large...
Abstract. During the Last Glacial Period (LGP), Greenland experienced approximately thirty abrupt warming phases, known as Dansgaard-Oeschger (D-O) Events, followed by cooling back to baseline glacial conditions. Studies of mean climate change across transitions reveal indistinguishable phase-offsets between shifts in temperature, dust, sea salt, accumulation and moisture source, thus preventing a comprehensive understanding “anatomy” D-O cycles (Capron et al,. 2021). One aspect that has not...
Svalbard spans large climate gradients, associated with atmospheric circulation patterns and variations in ocean heat content sea ice cover. Future precipitation increases are projected to peak the northeast mainly occur winter, but uncertainties underscore need for reconstructions of long‐term spatial temporal amounts seasonality. We use lipid biomarkers from four sedimentary lake records along a climatic gradient western northeastern reconstruct Holocene water cycle changes. measured leaf...
The Sjuøyane archipelago is the northernmost land area of Svalbard; thus, it provides a window to study terrestrial glacial history and dynamics Svalbard–Barents Sea Ice Sheet complement marine geological studies in region. To reconstruct Sjuøyane, we describe coastal sedimentary sections Quaternary sediments constrain their chronology by radiocarbon optically stimulated luminescence ages. Erratic boulders bedrock are sampled for 10 Be cosmogenic exposure dating, aiming determine...
The system of safety associated with lab and fieldwork at UiT Arctic University Norway’s Tromsø campus is in serious need improvement. A volunteer working group employees evaluated current conditions NT-faculty beyond, found a wide range issues many overlapping causes. This report contains their findings related to three overarching problem areas: communication, accountability, training; as well topical areas such chemicals, fieldwork, biohazards. concludes that significant reform needed...
Constraining the hydrological response to past climate change can improve model predictions. These constraints are most useful when provided in variables that native models (e.g., precipitation or soil water isotope values during a defined season). Leaf wax hydrogen isotopes extracted from lake sediments valuable proxies reconstruct cycle. In some lakes, multiple leaf compounds may provide information about different aspects of system seasonality, growing season evaporation, etc.),...
Sediment cores from Kløverbladvatna, a threshold lake in Wahlenbergfjorden, Nordaustlandet, Svalbard were used to reconstruct Holocene glacier fluctuations.Meltwater Etonbreen spills over the lake, only when is significantly larger than at present.Lithological logging, loss-on-ignition, ITRAX scanning and radiocarbon dating of show that Kløverbladvatna became isolated Wahlenbergfjorden c. 5.4 cal.kyr BP due glacioisostatic rebound.During Late Holocene, laminated clayey gyttja lacustrine...
Abstract Understanding patterns of colonisation is important for explaining both the distribution single species and anticipating how ecosystems may respond to global warming. Insular flora be especially vulnerable because oceans represent severe dispersal barriers. Here we analyse two lake sediment cores from Iceland ancient sedimentary DNA infer Holocene vegetation development. Our lakes Torfdalsvatn Nykurvatn span last c . 12,000 cal. yr BP 8600 BP, respectively. With near-centennial...
<p>Understanding patterns of colonisation is important for explaining both the distribution single species and anticipating how ecosystems may respond to global warming. Insular flora be especially vulnerable because oceans represent severe dispersal barriers. Here we analyse two lake sediment cores from Iceland ancient sedimentary DNA infer Holocene vegetation development. Our lakes Torfdalsvatn Nykurvatn span last c. 12,000 cal. yr BP 8600 BP, respectively. With...