A5032507027- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Vehicle emissions and performance
- Advanced Chemical Physics Studies
- Quantum, superfluid, helium dynamics
- Air Quality Monitoring and Forecasting
- Computational Drug Discovery Methods
- Botany and Plant Ecology Studies
- Atomic and Molecular Physics
- Machine Learning in Materials Science
- Theoretical and Computational Physics
- Spectroscopy and Quantum Chemical Studies
- Inorganic Fluorides and Related Compounds
- Molecular spectroscopy and chirality
- Social and Educational Sciences
- Environmental Policies and Emissions
- Ecology and Vegetation Dynamics Studies
- Wind and Air Flow Studies
- Climate Change Policy and Economics
- Crystallography and molecular interactions
- Atmospheric aerosols and clouds
- Chemical Thermodynamics and Molecular Structure
- Forest Ecology and Biodiversity Studies
UiT The Arctic University of Norway
2014-2024
Norwegian Meteorological Institute
2014-2024
Rice University
2023
University of Latvia
2023
Aarhus University
2003-2020
Université Toulouse III - Paul Sabatier
1998-2004
Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes
2004
University of Oxford
1992
Bernhard Nocht Institute for Tropical Medicine
1988
Abstract. The Meteorological Synthesizing Centre-West (MSC-W) of the European Monitoring and Evaluation Programme (EMEP) has been performing model calculations in support Convention on Long Range Transboundary Air Pollution (CLRTAP) for more than 30 years. EMEP MSC-W chemical transport is still one key tools within air pollution policy assessments. Traditionally, covered all Europe with a resolution about 50 km × km, extending vertically from ground level to tropopause (100 hPa). changed...
Understanding the surface O 3 response over a “receptor” region to emission changes foreign “source” is key evaluating potential gains from an international approach abate ozone (O ) pollution. We apply ensemble of 21 global and hemispheric chemical transport models estimate spatial average east Asia (EA), Europe (EU), North America (NA), south (SA) 20% decreases in anthropogenic emissions precursors, NO x , NMVOC, CO (individually combined), each these regions. find that mean concentrations...
Abstract. The EMEP4UK modelling system is a high resolution (5×5 km2) application of the EMEP chemistry-transport model, designed for scientific and policy studies in UK. We demonstrate use performance through study ground-level ozone (O3) during extreme August 2003 heat-wave. Meteorology generated by Weather Research Forecast (WRF) nudged every six hours with reanalysis data. focus on SE England, where hourly average O3 reached up to 140 ppb accurately reproduces elevated much its...
Abstract. The impact of climate change on surface ozone over Europe was studied using four offline regional chemistry transport models (CTMs) and one online integrated climate-chemistry model (CCM), driven by the same global projection future under SRES A1B scenario. Anthropogenic emissions precursors from RCP4.5 for year 2000 were used simulations both present periods in order to isolate assess robustness results across different models. sensitivity simulated changes between 2000–2009...
Abstract. The impact of climate and emissions changes on the deposition reactive nitrogen (Nr) over Europe was studied using four offline regional chemistry transport models (CTMs) driven by same global projection future period 2000–2050. Anthropogenic for years 2005 2050 were used simulations both present periods in order to isolate change, hemispheric boundary conditions emissions, assess robustness results across different models. from these CTMs clearly show that main driver N-deposition...
Abstract. The wet deposition of nitrogen and sulfur in Europe for the period 1990–2010 was estimated by six atmospheric chemistry transport models (CHIMERE, CMAQ, EMEP MSC-W, LOTOS-EUROS, MATCH MINNI) within framework EURODELTA-Trends model intercomparison. simulated its trends two 11-year periods (1990–2000 2000–2010) were evaluated using data from observations European monitoring network. For annual oxidised (WNOx), bias 30 % average most models. There a tendency to underestimate reduced...
Abstract. The EURODELTA-Trends multi-model chemistry-transport experiment has been designed to facilitate a better understanding of the evolution air pollution and its drivers for period 1990–2010 in Europe. main objective is assess efficiency pollutant emissions mitigation measures improving regional-scale quality. present paper formulates scientific questions policy issues being addressed by modelling with an emphasis on how design technical features answer these questions. three tiers,...
Abstract. The evaluation and intercomparison of air quality models is key to reducing model errors uncertainty. projects AQMEII3 EURODELTA-Trends, in the framework Task Force on Hemispheric Transport Air Pollutants Measurements Modelling, respectively (both task forces under UNECE Convention Long Range Pollution, LTRAP), have brought together various regional analyze their performance terms concentrations wet deposition, as well address other specific objectives.This paper jointly examines...
Abstract. The implementation of European emission abatement strategies has led to a significant reduction in the emissions ozone precursors during last decade. Ground-level is also influenced by meteorological factors such as temperature, which exhibit interannual variability and are expected change future. impacts climate on air quality usually investigated through air-quality models that simulate interactions between emissions, meteorology chemistry. Within multi-model assessment, this...
Fifteen chemistry‐transport models are used to quantify, for the first time, export of oxidised nitrogen (NO y ) and from four regions (Europe, North America, South Asia, East Asia), estimate uncertainty in results. Between 12 24% NO x emitted is exported each region annually. The strongest impact source on a foreign is: Europe America Europe, Asia America. exports most , least. receives other regions. 8 15% transported over distances larger than 1000 km, with 3–10% ultimately deposited
Abstract. A multi-model study of the long-range transport ozone and its precursors from major anthropogenic source regions was coordinated by Task Force on Hemispheric Transport Air Pollution (TF HTAP) under Convention Long-range Transboundary (LRTAP). Vertical profiles at 12-h intervals 2001 are available twelve models contributing to this compared here with observed ozonesondes. The contributions each region analysed for selected sondes, analysis is supplemented retroplume calculations...
Abstract. In the framework of EURODELTA-Trends (EDT) modeling experiment, several chemical transport models (CTMs) were applied for 1990–2010 period to investigate air quality changes in Europe as well capability reproduce observed long-term trends. Five CTMs have provided modeled data 21 continuous years using emission scenarios prepared by International Institute Applied Systems Analysis/Greenhouse Gas – Air Pollution Interactions and Synergies (IIASA/GAINS) corresponding year-by-year...
Abstract. Eleven of the world's 20 most polluted cities are located in India and poor air quality is already a major public health issue. However, anthropogenic emissions predicted to increase substantially short-term (2030) medium-term (2050) futures India, especially if no further policy efforts made. In this study, EMEP/MSC-W chemical transport model has been used predict changes surface ozone (O3) fine particulate matter (PM2.5) for world changing climate. The reference scenario (for...
Abstract. A description of the new air quality downscaling model – urban EMEP (uEMEP) and its combination with MSC-W (European Monitoring Evaluation Programme Meteorological Synthesising Centre West) is presented. uEMEP based on well-known Gaussian modelling principles. The uniqueness system in “local fraction” calculation contained within it. This allows to be imbedded can carried out anywhere domain, without any double counting emissions, if appropriate proxy data are available that...
Abstract. Atmospheric pollution has many profound effects on human health, ecosystems, and the climate. Of concern are high concentrations deposition of reactive nitrogen (Nr) species, especially reduced N (gaseous NH3, particulate NH4+). chemistry transport models (ACTMs) crucial to understanding sources impacts Nr its potential mitigation. Here we undertake first evaluation global version EMEP MSC-W ACTM driven by WRF meteorology (1∘×1∘ resolution), with a focus surface wet S species...
Benchmarking molecular properties with Gaussian-type orbital (GTO) basis sets can be challenging, because one has to assume that the computed property is at complete set (CBS) limit, without a robust measure of error. Multiwavelet (MW) bases systematically improved controllable error, which eliminates need for such assumptions. In this work, we have used MWs within Kohn-Sham density functional theory compute static polarizabilities 92 closed-shell and 32 open-shell species. The results are...
MRChem is a code for molecular electronic structure calculations, based on multiwavelet adaptive basis representation. We provide description of our implementation strategy and several benchmark calculations. Systems comprising more than thousand orbitals are investigated at the Hartree–Fock level theory, with an emphasis scaling properties. With design, terms that formally scale quadratically system size in effect have better because implicit screening introduced by inherent adaptivity...