Publications

Inverse modeling of halocarbons: sensitivity to the baseline definition

Vojta, Martin; Thompson, Rona Louise; Zwaaftink, Christine Groot; Stohl, Andreas

Inverse constraints for emission fluxes of atmospheric tracers estimated from concentration measurements and Lagrangian transport.

Pisso, I.; Patra, P.; Breivik, K.

Inventory review 2005. Emission data reported to LRTAP Convention and NEC Directive. Initial review for HMs and POPs. EMEP/MSC-W Technical report, 1/2005

Vestreng, V.; Breivik, K.; Adams, M.; Wagner, A.; Goodwin, J.; Rozovskaya, O.; Pacyna J.M.

Intuitively tuned elastic bias correction of atmospheric inversion using Gaussian process prior: Application to accidental radioactive emissions

Brožová, Antonie; Šmídl, Václav; Tichý, Ondřej; Evangeliou, Nikolaos

Precise estimation of atmospheric pollutant releases is crucial for assessing the impact of environmental accidents. Atmospheric inversion typically relies on a linear model with a source–receptor sensitivity (SRS) matrix, which may contain significant errors or even completely fail to capture the real magnitude of the event. We propose a correction of the SRS matrix formulated as slight shifts in the observation locations, effectively warping the sensitivity field. To constrain these shifts and ensure data-driven corrections, we model them using a Gaussian process prior. This prior not only enforces smoothness and sparsity, but also enables posterior prediction of shifts at previously unseen locations. This key feature provides a mechanism for hyper-parameter tuning: the predicted shift field can be visualized on a map and assessed by an expert. We present a user-friendly framework that combines a Bayesian inversion model with correction and a tuning algorithm based on L-curve-like plots and the maps of predicted shifts. The proposed method is demonstrated on three case studies: the ETEX-I experiment, the 137Cs emissions during the 2020 Chernobyl wildfires, and the 106Ru release in 2017.

Introduksjon om samarbeidet i Framsenteret og flaggskipet Miljøgifter. NILU F

Heimstad, E.S.

Introduction: geoscientific knowledgebase of Chernobyl and Fukushima.

Yamauchi, M.; Voitsekhovych, O.; Korobova, E.; Stohl, A.; Wotawa, G.; Kita, K.; Aoyama, M.; Yoshida, N.

Introduction to WP2 – Exposure

Hanssen, Linda

Introduction to workshop on national AQMS system for South Africa. NILU F

Endregard, G.

Introduction to the European Monitoring and Evaluation Programme (EMEP) and observed atmospheric composition change during 1972-2009.

Tørseth, K.; Aas, W.; Breivik, K.; Fjæraa, A.M.; Fiebig, M.; Hjellbrekke, A.-G.; Lund Myhre, C.; Solberg, S.; Yttri, K.E.

Introduction to special section on 'East Asia Climate and Environment'.

Isaksen, I.S.A.; Dalsøren, S.; Li, L.; Wang, W.-C.

Introduction to recent EMEP activities of relevance for EANET. Powerpoint presentation. NILU F

Tørseth, K.

Introduction to PM monitoring methods. Powerpoint presentation. NILU F

Marsteen, L.

Introduction to hCOMET special issue, 'Comet assay in vitro'

Dusinska, Maria; Costa, Solange; Collins, Andrew