Vitenskapelig foredrag

Towards a Safe and Sustainable Plastic Future: A Tiered Approach for Safety Assessment in the SSbD context

Sengupta, Tanima; Murugadoss, Sivakumar; Olsen, Ann-Karin Hardie; Yamani, Naouale El; Dusinska, Maria; Rundén-Pran, Elise; Longhin, Eleonora Marta

Towards Net Zero: Evaluating Combined Terrestrial and Marine CDR Approaches

Sathyanadh, Anusha; Esfandiari, Homa; Bourgeois, Timothée; Schwinger, Jörg; Muri, Helene; Tommi, Bergman,; A, Partanen,; M, Debolsky,; M., Seifert,; D, Keller,

With the global annual mean temperature in 2024 exceeding 1.5°C above preindustrial levels, there is an urgent need to investigate pathways for returning the Earth system to lower temperature levels. In addition to stringent emission reduction, we need portfolios of Carbon Dioxide Removal (CDR) techniques to achieve the net-zero emission target. Therefore, it is crucial to evaluate various land and ocean-based CDRs for their effectiveness, environmental risks, and additional benefits.
This study evaluates the CO₂ sequestration potential and efficacy of two prominent CDR methods—Bioenergy with Carbon Capture and Storage (BECCS) and Ocean Alkalinity Enhancement (OAE)—applied both individually and in combination. Using the Norwegian Earth System Model (NorESM2-LM), simulations were designed with ramped-up CDR deployment, targeting 5.2 million km² of bioenergy feedstock for BECCS and a CaO deployment rate of 2.7 Gt/year for OAE by 2100 across the exclusive economic zones of Europe, the United States, and China. The results reveal a nearly additive carbon removal effect of BECCS and OAE. Over the period 2030-2100, OAE sequestered a total of 7 ppm of CO2 with an accumulated 82.3 Gt CaO, achieving a CDR effectiveness of 0.08 ppm per Gt of CaO, while BECCS removes 23 ppm of CO2, with CDR effectiveness of 3.1 ppm per million km² of bioenergy crops. The combined BECCS-OAE simulation offsets anthropogenic CO₂ emissions of 5.4 Gt/year by 2100—equivalent to over 60% of current global transport sector emissions. However, the combined CDR scenario shows negligible effects on the global annual mean temperature, with no clear response detectable against the high internal variability. This underscores the limitations of current CDR approaches in addressing climate warming over the 21st century and emphasizes the need for substantial emissions reductions, supportive policies and diversified CDR strategies to facilitate a return to lower global temperatures.

Quantifying the Potential of Digital Innovations to Advance Circular Economy in Consumer and Industrial Goods

Boero, Riccardo; Hernandez, Miguel Las Heras; Bouman, Evert; Guerreiro, Cristina

Low concentrations of cyclic volatile methyl siloxanes in Antarctica

Durham, Jeremy; McNett, Debra; Plotzke, Kathy; Xu, Shihe; Seston, Rita; Nipen, Maja; Bohlin-Nizzetto, Pernilla; Gerhards, Reinhard; Bialik, Robert; Fudala, Katarzyna; Mateev, Dragomir; Dykyi, Evgen

Dust in the Arctic: Interactions between climate, dust, and ecosystems

Meinander, O.; Uppstu, A.; Walhauserova, P. Dagsson; Zwaaftink, Christine Groot; Jørgensen, C. J.; Baklanov, A.; Kristensson, A.; Massling, A.; Sofiev, M.

SHORT- AND MEDIUM-CHAIN CHLORINATED PARAFFINS IN AN ARCTIC MARINE FOOD CHAIN

Giebichenstein, Julia; Warner, Nicholas Alexander; Harju, Mikael; Routti, Heli Anna Irmeli; Varpe, Øystein; Gabrielsen, Geir W.; Borgå, Katrine

Wildfire Exposure Assessment Using a Satellite-Constrained Lagrangian Models: Insights from the 2024 Smokehouse Creek Fire

Jia, Yue; Hyndman, David W.; Pisso, Ignacio

Source apportionment of PM10 oxidative potential during the WeBaSOOP campaignes in Belgrade

Jovanović, M.; Petrović, B.; Davidović, M.; Stevanović, S.; Yttri, Karl Espen; Alastuey, A.; Bartonova, Alena; Jovašević-Stojanović, M.

Source apportionment of carbonaceous aerosol in Belgrade

Platt, Stephen Matthew; Davidović, M.; Bartonova, Alena; Ćirović, Ž.; Eckhardt, Sabine; Evangeliou, Nikolaos; Gundersen, Hans; Jovanović, M.; Jovašević-Stojanović, M.; Močnik, G.; Petrović, B.; Schneider, Philipp; Yttri, Karl Espen

Monitoring indoor environment in schools and what can we learn by asking occupants?

Bartonova, Alena; Høiskar, Britt Ann Kåstad; Fredriksen, Mirjam

From source to cell: Chemical driers of in vitro responses in Oslo's air pollution

Longhin, Eleonora Marta; Honza, Tatiana; Froment, Jean Francois; McFadden, Erin; Hudecova, Alexandra Misci; Hak, Claudia; Yttri, Karl Espen; Rundén-Pran, Elise

Large-scale atmospheric response to anomalies in the sea surface temperatures and sea ice in the 2021-22 winter

Nishii, Kazuaki; Taguchi, Bunmei; Nakamura, Hisashi; Orsolini, Yvan