A5071717323- Oceanographic and Atmospheric Processes
- Arctic and Antarctic ice dynamics
- Marine and environmental studies
- Marine Biology and Ecology Research
- Marine and fisheries research
- Coastal and Marine Dynamics
- Methane Hydrates and Related Phenomena
- Climate variability and models
- Cryospheric studies and observations
- Marine Bivalve and Aquaculture Studies
- Winter Sports Injuries and Performance
- Lipid Membrane Structure and Behavior
- Plant and Biological Electrophysiology Studies
- Isotope Analysis in Ecology
- Geological Studies and Exploration
- Underwater Acoustics Research
- Ocean Waves and Remote Sensing
- Hydrology and Sediment Transport Processes
- Climate change and permafrost
- Soil erosion and sediment transport
- Meteorological Phenomena and Simulations
- Neurobiology and Insect Physiology Research
- Aeolian processes and effects
- Marine and coastal ecosystems
Stockholm University
2021-2024
Luleå University of Technology
2024
Swedish Polar Research Secretariat
2024
Foundation for Baltic and East European Studies
2022-2023
Swedish Meteorological and Hydrological Institute
2022
Bolin Centre for Climate Research
2020
TU Dortmund University
2018
Abstract The processes controlling advance and retreat of outlet glaciers in fjords draining the Greenland Ice Sheet remain poorly known, undermining assessments their dynamics associated sea-level rise a warming climate. Mass loss has increased six-fold over last four decades, with discharge melt from comprising key components this loss. Here we acquired oceanographic data multibeam bathymetry previously uncharted Sherard Osborn Fjord northwest where Ryder Glacier drains into Arctic Ocean....
Bottom trawling is known to affect benthic faunal communities but its effects on sediment suspension and seabed biogeochemistry are less well described. In addition, few studies have been carried out in the Baltic Sea, despite decades of this unique brackish environment frequent occurrence areas where hypoxia low variable salinity already act as ecosystem stressors. We measured physical biogeochemical impacts an otter trawl a muddy seabed. Multibeam bathymetry revealed 36 m-wide track,...
Abstract Stratified oceanic turbulence is strongly intermittent in time and space, therefore generally underresolved by currently available situ observational approaches. A promising tool to at least partly overcome this constraint are broadband acoustic observations of turbulent microstructure that have the potential provide mixing parameters orders magnitude higher resolution compared conventional Here, we discuss applicability, limitations, measurement uncertainties approach for some...
Abstract Diapycnal mixing impacts vertical transport rates of salt, heat, and other dissolved substances, essential for the overturning circulation ecosystem functioning in marine systems. While most studies have focused on induced by individual obstacles tidal flows, we investigate net effect non‐tidal flow over multiple small‐scale (<1 km) bathymetric features penetrating a strongly‐stratified density interface coastal region. We combine high‐resolution broadband acoustic observations...
Abstract Record-high air temperatures were observed over Greenland in the summer of 2019 and melting northern Ice Sheet was particularly extensive. Here we show, through direct measurements, that near surface ocean Sherard Osborn Fjord, Greenland, reached 4 °C August 2019, while neighboring Petermann they never exceeded 0 °C. We show this disparity temperature between two fjords occurred because thick multi-year sea ice at entrance Fjord trapped waters inside fjord, which led to formation a...
Abstract Knowledge about seafloor depth, or bathymetry, is crucial for various marine activities, including scientific research, offshore industry, safety of navigation, and ocean exploration. Mapping the central Arctic Ocean challenging due to presence perennial sea ice, which limits data collection icebreakers, submarines, drifting ice stations. The International Bathymetric Chart (IBCAO) was initiated in 1997 with goal updating bathymetric portrayal. project team has since released four...
Abstract. Turbulent diapycnal mixing is important for the estuarine circulation between basins of Baltic Sea as well its local ecosystems, in particular with regard to eutrophication and anoxic conditions. While interior overall relatively calm, stratified flow over steep bathymetric features known a source strong turbulent mixing. Yet, current situ observations often cannot capture spatio-temporal development dynamic intermittent related overflows rough bathymetry. We present observational...
Transitions periods between seasons in the Arctic are phases when atmosphere-sea ice-ocean interactions heightened, especially during these of exceptional warming.&#160; These transition may be accompanied by shifts atmospheric transport patterns, distribution sea ice and extreme events, such as rivers.&#160; Atmospheric Rivers act accelerants melt its redistribution, leading to spatial complexity ice-ocean-atmosphere exchanges mass energy.As part an interdisciplinary team aboard I/B...
Abstract Marine extremes are recognized to cause severe ecosystem and socioeconomic impacts. However, in polar regions, such as the Barents Sea, driving mechanisms of these remain poorly understood require careful consideration observed long-term ocean warming. Here we show that on short time scales a few days, marine heatwaves cold spells dynamically driven by dipole atmospheric circulation pattern between Nordic Seas Sea. Importantly, dipole’s eastern component determines anomalies...
We investigate the effect of extremely rough bathymetry on energy dissipation and mixing in a coastal region characterized by small-scale seafloor features penetrating strongly-stratified density interface comparable vertical scale. Our data from non-tidal Baltic Sea include shear microstructure measurements observations broadband echosounder, here used to resolve extreme variability intermittency stratified turbulence vicinity obstacles. Scale analysis acoustic imaging turbulent motions...
Abstract. Turbulent diapycnal mixing is important for the estuarine circulation between basins of Baltic Sea as well its local ecosystems, in particular with regard to eutrophication and anoxic conditions. While interior overall relatively calm, stratified flow over steep bathymetric features known a source strong turbulent mixing. Yet, current situ observations often cannot capture dynamic intermittent related overflow rough bathymetry. We present observational oceanographic data together...