Publikasjoner

A European aerosol phenomenology – 9: Light absorption properties of carbonaceous aerosol particles across surface Europe

Rovira, Jordi; Savadkoohi, Marjan; Močnik, Griša; Chen, Gang I.; Aas, Wenche; Alados-Arboledas, Lucas; Artiñano, Begoña; Aurela, Minna; Backman, John; Banerji, Sujai; Beddows, David; Brem, Benjamin T.; Chazeau, Benjamin; Coen, Martine Collaud; Colombi, Cristina; Conil, Sébastien; Costabile, Francesca; Coz, Esther; De Brito, Joel F.; Eleftheriadis, Kostas; Platt, Stephen Matthew; Yttri, Karl Espen; Pandolfi, Marco

Carbonaceous aerosols (CA), composed of black carbon (BC) and organic matter (OM), significantly impact the climate. Light absorption properties of CA, particularly of BC and brown carbon (BrC), are crucial due to their contribution to global and regional warming. We present the absorption properties of BC (bAbs,BC) and BrC (bAbs,BrC) inferred using Aethalometer data from 44 European sites covering different environments (traffic (TR), urban (UB), suburban (SUB), regional background (RB) and mountain (M)). Absorption coefficients showed a clear relationship with station setting decreasing as follows: TR > UB > SUB > RB > M, with exceptions. The contribution of bAbs,BrC to total absorption (bAbs), i.e. %AbsBrC, was lower at traffic sites (11–20 %), exceeding 30 % at some SUB and RB sites. Low AAE values were observed at TR sites, due to the dominance of internal combustion emissions, and at some remote RB/M sites, likely due to the lack of proximity to BrC sources, insufficient secondary processes generating BrC or the effect of photobleaching during transport. Higher bAbs and AAE were observed in Central/Eastern Europe compared to Western/Northern Europe, due to higher coal and biomass burning emissions in the east. Seasonal analysis showed increased bAbs, bAbs,BC, bAbs,BrC in winter, with stronger %AbsBrC, leading to higher AAE. Diel cycles of bAbs,BC peaked during morning and evening rush hours, whereas bAbs,BrC, %AbsBrC, AAE, and AAEBrC peaked at night when emissions from household activities accumulated. Decade-long trends analyses demonstrated a decrease in bAbs, due to reduction of BC emissions, while bAbs,BrC and AAE increased, suggesting a shift in CA composition, with a relative increase in BrC over BC. This study provides a unique dataset to assess the BrC effects on climate and confirms that BrC can contribute significantly to UV–VIS radiation presenting highly variable absorption properties in Europe.

Elsevier

Understanding the origins of urban particulate matter pollution based on high-density vehicle-based sensor monitoring and big data analysis

Liang, Yiheng; Wang, Xiaohua; Dong, Zhongzhen; Wang, Xinfeng; Wang, Shidong; Si, Shuchun; Wang, Jing; Liu, Hai Ying; Zhang, Qingzhu; Wang, Qiao

Sentinel and Copernicus powered Arctic Wildfire Knowledge System “Arctic Peat-And Forest-fire Information System”

Stebel, Kerstin; Eckhardt, Sabine; Evangeliou, Nikolaos; Kaiser, Johannes; Schneider, Philipp; Sollum, Espen; Aun, Margit; George, Jan-Peter

Source regions of fire emission observed during aircraft campaigns and in-situ networks

Eckhardt, Sabine; Evangeliou, Nikolaos; Sollum, Espen; Stebel, Kerstin

Long-term and night-time aerosol optical depth measurements at Ny-Ålesund using sun and lunar precision filterradiometers

Kouremeti, Natalia; Kazadzis, Stelios; Gröbner, Julian; Stebel, Kerstin; Hansen, Georg Heinrich; Mazzola, Mauro; Wehrli, Christoph

An Introduction to prismAId

Boero, Riccardo

A Quantitative Model of Endogenous Climate Adaptation: Data Challenges, Validation, and Applications

Boero, Riccardo

Kunstige juletrær kan være «pyntet» med helseskadelige stoffer

Gundersen, Cathrine Brecke; Nipen, Maja

Exploring the Influence of Local Urban and Industrial Carbon-Based Pollutant Sources on Total Column Concentration Enhancements in Houston, Texas during TRACER

Spicer, Elizabeth; Crowell, Sean; Xu, Feng; Klein, Petra; Honeycutt, Wesley T.; Jacobs, Nicole; Miller, Timothy; Shearer, Andrew S.; Kadiyala, Vishnu Priyatamkumar; Smith, Elizabeth N.; Flynn, Connor J.; Krishnankutty, Nalini; Livingstone, Lucas; Flynn, James H.; Moreira, Maria Eugenia Velasco; Bell, Tyler M.; Keeler, Evan; Kyrouac, Jenni; Ermold, Brian

Arctic peat fire emissions estimated from satellite observations of fire radiative power

Kaiser, Johannes; Stebel, Kerstin; Schneider, Philipp; Huijnen, Vincent

An efficient use of a Lagrangian transport model for atmospheric inversions using satellite observations: case study using TROPOMI to estimate CH4 emissions over Siberia

Krishnankutty, Nalini; Thompson, Rona Louise; Pisso, Ignacio; Schneider, Philipp; Stebel, Kerstin; Sasakawa, Motoki; Platt, Stephen Matthew

Forurensning

Heimstad, Eldbjørg Sofie