A5020688394- Methane Hydrates and Related Phenomena
- Arctic and Antarctic ice dynamics
- Marine and coastal ecosystems
- Ocean Acidification Effects and Responses
- Atmospheric and Environmental Gas Dynamics
- Geological Studies and Exploration
- Climate change and permafrost
- Oceanographic and Atmospheric Processes
- Marine Biology and Ecology Research
- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Marine and environmental studies
- Arctic and Russian Policy Studies
- Hydrocarbon exploration and reservoir analysis
- Marine Bivalve and Aquaculture Studies
- CO2 Sequestration and Geologic Interactions
- Marine and fisheries research
- Crystallization and Solubility Studies
- Chemical and Physical Properties in Aqueous Solutions
- Analytical Chemistry and Sensors
- Underwater Acoustics Research
- Isotope Analysis in Ecology
- Groundwater and Isotope Geochemistry
- Polar Research and Ecology
- Water Quality Monitoring and Analysis
University of Gothenburg
2014-2024
University of Utah
2023
Chalmers University of Technology
1988-2011
University of Bergen
2001-2002
The recent warming in the Arctic is affecting a broad spectrum of physical, ecological, and human/cultural systems that may be irreversible on century time scales have potential to cause rapid changes earth system. response carbon cycle climate major issue global concern, yet there has not been comprehensive review status contemporary its change. This designed clarify key uncertainties vulnerabilities ongoing climatic While it clear are substantial stocks Arctic, also significant associated...
Fresh water from summer ice melt and the total freshwater content of Arctic Ocean column above thermocline are estimated vertical profiles temperature salinity observed on I/B Oden 1991 cruise. The seasonal ranges 0.5 m to slightly 1 is moderately uniform over observation area. Regions lower melting seen Morris Jesup Plateau. calculated relative just north Barents Sea. increases toward interior Ocean, showing that fresh advected other regions into different separated by fronts Nansen‐Gakkel...
The hypothesis of a km-thick ice shelf covering the entire Arctic Ocean during peak glacial conditions was proposed nearly half century ago. Floating shelves preserve few direct traces after their disappearance, making reconstructions difficult. Seafloor imprints should, however, exist where grounded along flow paths. Here we present new evidence ice-shelf groundings on bathymetric highs in central Ocean, resurrecting concept an extending over at least one previous age. New and previously...
The Arctic Ocean has experienced rapid warming and sea ice loss in recent decades, becoming the first open-ocean basin to experience widespread aragonite undersaturation [saturation state of (Ωarag) < 1]. However, its trend toward long-term ocean acidification underlying mechanisms remain undocumented. Here, we report there, with rates three four times higher than other basins, attribute it changing coverage on a decadal time scale. Sea melt exposes seawater atmosphere promotes uptake...
Profiles of chemical constituents in seawater above the Alpha Ridge central Arctic Ocean obtained during Canadian Expedition to Study (CESAR) support a model which halocline is maintained by dense, saline water produced on continental shelves within formation sea ice. It argued that nutrient regeneration largely accounts for maximum has been observed upper over wide region Ocean, and while Bering Sea North Altantic can be recognized as origins water, masses from these regions undergo...
The Atlantic and Pacific oceans provide source waters for the Arctic Ocean that can be distinguished by their differing nitrate phosphate concentration relationships. Using these relationships, we estimate amount of in surface layer (top 30 m) Ocean. water is dominant most Eurasian Basin present significant amounts Makarov north East Siberian Sea. Canadian Amundsen Greenland. We deduce circulation patterns from distributions conclude flow within differs ice drift along North American...
In the Arctic Ocean, Pacific source water can be distinguished from Atlantic by nitrate‐phosphate concentration relationships, with having higher phosphate concentrations relative to those of nitrate. Furthermore, water, originally inflow through Bering Strait, is clearly recognizable in outflows low‐salinity waters Ocean northern North Canadian Archipelago and Fram Strait. Archipelago, we observe that almost all flowing Lancaster Jones sounds, most top 100 m Smith Sound (containing flow...
The Oden 91 North Pole expedition obtained Oceanographic measurements on four sections in the Nansen and Amundsen basins of Eurasian Basin Makarov Canadian Basin, thereby proving feasibility carrying out a typical program using an icebreaker Arctic Ocean. data show greater spatial variability water structure circulation than was apparent from previous data. results that clear front exists between such upper halocline is almost absent Basin. lower produced Barents‐Kara Sea region permeates...
The suitability of total carbonate production instead oxygen consumption as a measure benthic respiration has been investigated. In situ fluxes carbonate, oxygen, calcium, alkalinity, nutrients, and sulfide across the sediment‐water interface were measured in diver‐operated flux chambers. Two chambers run parallel to test influence pH levels on production. one, kept constant near ambient levels; other, was allowed deplete lower pH. We found that corrected for CaCO 3...
Abstract. Carbon dioxide (CO2) is, next to water vapour, considered be the most important natural greenhouse gas on Earth. Rapidly rising atmospheric CO2 concentrations caused by human actions such as fossil fuel burning, land-use change or cement production over past 250 years have given cause for concern that changes in Earth's climate system may progress at a much faster pace and larger extent than during 20 000 years. Investigating global carbon cycle pathways finding suitable adaptation...
The Arctic Ocean constitutes a large body of water that is still relatively poorly surveyed because logistical difficulties, although the importance for global circulation and climate widely recognized. For instance, concentration inventory anthropogenic CO 2 ( C ant ) in are not properly known despite its volume well‐ventilated waters. In this work, we have synthesized available transient tracer measurements (e.g., CFCs SF 6 made during more than two decades by authors. data used to...
Climate change is expected to have a strong effect on the Eastern Siberian Arctic Shelf (ESAS) region, which includes 40% of shelves and comprises Laptev East seas. The largest organic carbon pool, dissolved (DOC), may significantly due changes in both riverine inputs transformation rates; however, present DOC inventories patterns are poorly understood. Using samples from International Study 2008, this study examines for first time removal shelf waters with residence times that range months...
The Global Ocean Ship-Based Hydrographic Investigations Program (GO-SHIP) provides a globally coordinated network and oversight of 55 sustained decadal repeat hydrographic reference (core) lines as part the global ocean/climate observing systems (GOOS/GCOS) for study physical oceanography, ocean carbon, oxygen nutrient cycles, marine biogeochemistry. GO-SHIP enables assessment sequestration heat changing circulation ventilation patterns, their effects on health Earth's climate. Rapid quality...
The Siberian shelf seas cover large shallow areas that receive substantial amounts of river discharge. runoff contributes nutrients promote marine primary production, but also dissolved and particulate organic matter. coastal regions are built up matter in permafrost thaws result erosion addition to the sea. Hence there multiple sources through microbial decomposition high partial pressures CO 2 seas. By evaluating data collected from Laptev East Seas summer 2008 we compute an excess DIC...
Abstract. Shelf seas are among the most active biogeochemical marine environments and East Siberian Sea is a prime example. This sea supplied by seawater from both Atlantic Pacific Oceans has substantial input of river runoff. All these waters contribute chemical constituents, dissolved particulate, but different signatures. ice formation during winter season melting in summer major impact on physical as well conditions. The internal circulation water mass distribution significantly...
Every year, the oceans absorb about 30% of anthropogenic carbon dioxide (CO2) leading to a re-equilibration marine carbonate system and decreasing seawater pH. Today, there is increasing awareness that these changes-summarized by term ocean acidification (OA)-could differentially affect competitive ability organisms, thereby provoking restructuring ecosystems biogeochemical element cycles. In winter 2013, we deployed ten pelagic mesocosms in Gullmar Fjord at Swedish west coast order study...