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Evaluating the Climate and Air Quality Impacts of Short-Lived Pollutants
EC | FP7 | SP1 | ENV
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  • Multi-model simulations of aerosol and ozone radiative forcing for the period 1990-2015

    Myhre, Gunnar; Aas, Wenche; Cherian, Ribu; Collins, William; Faluvegi, Greg; Flanner, Mark; Forster, Piers; Hodnebrog, Øivind; Klimont, Zbigniew; Mülmenstädt, Johannes; Myhre, Cathrine Lund; Olivié, Dirk; Prather, Michael; Quaas, Johannes; Samset, Bjørn H.;... (2017)
    Projects: EC | ECLIPSE (282688)
    Over the past decades, the geographical distribution of emissions of substances that alter the atmospheric energy balance has changed due to economic growth and pollution regulations. Here, we show the resulting changes to aerosol and ozone abundances and their radiative forcing, using recently updated emission data for the period 1990–2015, as simulated by seven global atmospheric composition models. The models broadly reproduce the large-scale changes in surface aerosol and ozone based on o...

    Regional temperature change potentials for short-lived climate forcers based on radiative forcing from multiple models

    B. Aamaas; T. K. Berntsen; T. K. Berntsen; J. S. Fuglestvedt; K. P. Shine; W. J. Collins (2017)
    Projects: EC | ECLIPSE (282688)
    We calculate the absolute regional temperature change potential (ARTP) of various short-lived climate forcers (SLCFs) based on detailed radiative forcing (RF) calculations from four different models. The temperature response has been estimated for four latitude bands (90–28° S, 28° S–28° N, 28–60° N, and 60–90° N). The regional pattern in climate response not only depends on the relationship between RF and surface temperature, but also on where and when emissions occurred...

    Radiative forcing and climate metrics for ozone precursor emissions: the impact of multi-model averaging

    MacIntosh, Claire R; Shine, Keith P; Collins, W J (2015)
    Projects: EC | ECLIPSE (282688)
    Multi-model ensembles are frequently used to assess understanding of the response of ozone and methane lifetime to changes in emissions of ozone precursors such as NOx, VOCs (volatile organic compounds) and CO. When these ozone changes are used to calculate radiative forcing (RF) (and climate metrics such as the global warming potential (GWP) and global temperature-change potential (GTP)) there is a methodological choice, determined partly by the available c...

    Intercomparison of shortwave radiative transfer schemes in global aerosol modeling: results from the AeroCom Radiative Transfer Experiment

    Randles , Cynthia A.; Kinne , Stefan; Myhre , G.; Schulz , M.; Stier , P.; Fischer , J.; Doppler , Lionel; Highwood , E.; Ryder , C.; Harris , B.; Huttunen , J.; Ma , Y.; Pinker , R. T.; Mayer , B.; Neubauer , D.;... (2013)
    Projects: EC | ECLIPSE (282688)
    In this study we examine the performance of 31 global model radiative transfer schemes in cloud-free conditions with prescribed gaseous absorbers and no aerosols (Rayleigh atmosphere), with prescribed scattering-only aerosols, and with more absorbing aerosols. Results are compared to benchmark results from high-resolution, multi-angular line-by-line radiation models. For purely scattering aerosols, model bias relative to the line-by-line models in the top-of-the atmosphere aerosol radiative f...

    The influence of cruise ship emissions on air pollution in Svalbard - a harbinger of a more polluted Arctic?

    Eckhardt, Sabine; Hermansen, Ove; Grythe, Henrik; Fiebig, Markus; Stebel, Kerstin; Cassiani, Massimo; Bäcklund, Are; Stohl, Andreas (2013)
    Projects: EC | ECLIPSE (282688)
    In this study we have analyzed whether tourist cruise ships have an influence on measured sulfur dioxide (SO2), ozone (O3), Aitken mode particle and equivalent black carbon (EBC) concentrations at Ny Ålesund and Zeppelin Mountain on Svalbard in the Norwegian Arctic during summer. We separated the measurement data set into periods when ships were present and periods when ships were not present in the Kongsfjord area, according to a long-term record of the number of passengers visiting Ny Ålesu...

    Evaluation of black carbon emission inventories using a Lagrangian dispersion model – a case study over southern India

    H. S. Gadhavi; K. Renuka; V. Ravi Kiran; A. Jayaraman; A. Stohl; Z. Klimont; G. Beig (2015)
    Projects: EC | ECLIPSE (282688)
    We evaluated three emission inventories of black carbon (BC) using Lagrangian particle dispersion model simulations and BC observations from a rural site in southern India (Gadanki; 13.48 degrees N, 79.18 degrees E) from 2008 to 2012. We found that 93 to 95% of the BC load at the observation site originated from emissions in India and the rest from the neighbouring countries and shipping. A substantial fraction (33 to 43%) of the BC was transported from northern India. Wet deposition is fo...

    Evaluating the climate and air quality impacts of short-lived pollutants

    Stohl , A.; Aamaas , B.; Amann , M.; Baker , L. H.; Bellouin , N.; Berntsen , T. K.; Boucher , Olivier; Cherian , R.; Collins , W.; Daskalakis , Nikolaos; Dusinska , M.; Eckhardt , S.; Fuglestvedt , J. S.; Harju , M.; Heyes , C.;... (2015)
    Projects: EC | ECLIPSE (282688)
    This paper presents a summary of the work done within the European Union's Seventh Framework Programme project ECLIPSE (Evaluating the Climate and Air Quality Impacts of Short-Lived Pollutants). ECLIPSE had a unique systematic concept for designing a realistic and effective mitigation scenario for short-lived climate pollutants (SLCPs; methane, aerosols and ozone, and their precursor species) and quantifying its climate and air quality impacts, and this paper presents the re...

    Metrics for linking emissions of gases and aerosols to global precipitation changes

    Shine, K. P.; Allan, R.P.; Collins, William J.; Fuglestvedt, Jan S. (2015)
    Projects: EC | ECLIPSE (282688)
    Recent advances in understanding have made it possible to relate global precipitation changes directly to emissions of particular gases and aerosols that influence climate. Using these advances, new indices are developed here called the Global Precipitation-change Potential for pulse (GPPP) and sustained (GPPS) emissions, which measure the precipitation change per unit mass of emissions. The GPP can be used as a metric to compare the effects of different emissions. Th...

    Variation in emission metrics due to variation in CO2 and temperature impulse response functions

    Olivié, D. J. L.; Peters, G. P. (2013)
    Projects: EC | ECLIPSE (282688)
    Emission metrics are used to compare the climate effect of the emission of different species, such as carbon dioxide (CO2) and methane (CH4). The most common metrics use linear impulse response functions (IRFs) derived from a single more complex model. There is currently little understanding on how IRFs vary across models, and how the model variation propagates into the metric values. In this study, we first derive CO2 and temperature IRFs for a large number of comple...

    Black carbon in the Arctic: the underestimated role of gas flaring and residential combustion emissions

    Stohl, A.; Klimont, Z.; Eckhardt, S.; Kupiainen, K.; Shevchenko, V. P.; Kopeikin, V. M.; Novigatsky, A. N. (2013)
    Projects: EC | ECLIPSE (282688)
    Arctic haze is a seasonal phenomenon with high concentrations of accumulation-mode aerosols occurring in the Arctic in winter and early spring. Chemistry transport models and climate chemistry models struggle to reproduce this phenomenon, and this has recently prompted changes in aerosol removal schemes to remedy the modeling problems. In this paper, we show that shortcomings in current emission data sets are at least as important. We perform a 3 yr model simulation of black carbon (BC) with ...
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