Browsing University of Hertfordshire by Author "Chemel, C."

Now showing items 21-40 of 44

    • Interactions between downslope flows and a developing cold-air pool 

      Burns, Paul; Chemel, C. (2015-01-01)
      A numerical model has been used to characterize the development of a region of enhanced cooling in an alpine valley with a width of order (Formula presented.) km, under decoupled stable conditions. The region of enhanced ...

    • Local and non-local controls on a persistent cold-air pool in the Arve River Valley 

      Arduini, G.; Chemel, C.; Staquet, C. (2020-02-28)
      A numerical model is used to simulate a persistent cold-air pool (PCAP) event that occurred in the section of the Arve River Valley around Passy in the French Alps. During this period, an upper-level ridge from the Atlantic ...

    • Mechanisms responsible for the build-up of ozone over South East England during the August 2003 heatwave 

      Francis, X.V.; Chemel, C.; Sokhi, R.S.; Norton, E.G.; Ricketts, H.M.A.; Fisher, B.E.A. (2011-12-01)
      The Community Multiscale Air Quality (CMAQ) model is used in order to quantify reasons for the build-up of ozone over South East England during the August 2003 heatwave. Unlike previous studies, the effects of individual ...

    • Meteorology, air quality, and health in London : The ClearfLo project 

      Bohnenstengel, S.I.; Belcher, S.E.; Aiken, A.; Allan, J.D.; Allen, G.; Bacak, A.; Bannan, T.J.; Barlow, J.F.; Beddows, D.C.S.; Bloss, W.J.; Booth, A.M.; Chemel, C.; Coceal, O.; Di Marco, C.F.; Dubey, M.K.; Faloon, K.H.; Fleming, Z.L.; Furger, M.; Gietl, J.K.; Graves, R.R.; Green, D.C.; Grimmond, C.S.B.; Halios, C.H.; Hamilton, J. F.; Harrison, R.M.; Heal, M.R.; Heard, D. E.; Helfter, C.; Herndon, S.C.; Holmes, R.E.; Hopkins, J. R.; Jones, A.M.; Kelly, F.J.; Kotthaus, S.; Langford, B.; Lee, J.D.; Leigh, R.J.; Lewis, A.C.; Lidster, R.T.; Lopez-Hilfiker, F.D.; McQuaid, J.B.; Mohr, C.; Monks, P. S.; Nemitz, E.; Ng, N.L.; Percival, C.J.; Prévôt, A.S.H.; Ricketts, H.M.A.; Sokhi, R.; Stone, D.; Thornton, J.A.; Tremper, A.H.; Valach, A.C.; Visser, S.; Whalley, L.K.; Williams, L.R.; Xu, L.; Young, D.E.; Zotter, P. (2015-05)
      Capsule: The ClearfLo project provides integrated measurements of the meteorology, composition and particulate loading of London's urban atmosphere to improve predictive capability for air quality. Air quality and heat are ...

    • Model evaluation and ensemble modelling of surface-level ozone in Europe and North America in the context of AQMEII 

      Solazzo, Efisio; Bianconi, Roberto; Vautard, Robert; Appel, K. Wyat; Moran, Michael D.; Hogrefe, Christian; Bessagnet, Bertrand; Brandt, Jorgen; Christensen, Jesper H.; Chemel, C.; Coll, Isabelle; van der Gon, Hugo Denier; Ferreira, Joana; Forkel, Renate; Vazhappilly Francis, Xavier; Grell, George; Grossi, Paola; Hansen, Ayoe B.; Jericevic, Amela; Kraljevic, Luksa; Miranda, Ana Isabel; Nopmongcol, Uarporn; Pirovano, Guido; Prank, Marje; Riccio, Angelo; Sartelet, Karine N.; Schaap, Martijn; Silver, Jeremy D.; Sokhi, Ranjeet S.; Vira, Julius; Werhahn, Johannes; Wolke, Ralf; Yarwood, Greg; Zhang, Junhua; Rao, S. Trivikrama; Galmarini, Stefano (2012-06)
      More than ten state-of-the-art regional air quality models have been applied as part of the Air Quality Model Evaluation International Initiative (AQMEII). These models were run by twenty independent groups in Europe and ...

    • Modelling photochemistry in alpine valleys 

      Brulfert, G.; Chemel, C.; Chaxel, E.; Chollet, J.P. (2005)

    • Numerical Simulation of Photochemical Episodes in Alpine Valleys 

      Brulfert, G.; Chollet, J.P.; Chemel, C.; Kerbiriou, M.A. (2004)

    • Observations of the daytime boundary layer in deep alpine valleys 

      Chemel, C.; Chollet, J.P. (2006)

    • Odour-impact assessment around a landfill site from weather-type classification, complaint inventory and numerical simulation 

      Chemel, C.; Riesenmey, C.; Batton-Hubert, M.; Vaillant, H. (2012-01)
      Gases released from landfill sites into the atmosphere have the potential to cause olfactory nuisances within the surrounding communities. Landfill sites are often located over complex topography for convenience mainly ...

    • Operational model evaluation for particulate matter in Europe and North America in the context of AQMEII 

      Solazzo, Efisio; Bianconi, Roberto; Pirovano, Guido; Matthias, Volker; Vautard, Robert; Moran, Michael D.; Appel, K. Wyat; Bessagnet, Bertrand; Brandt, Jorgen; Christensen, Jesper H.; Chemel, C.; Coll, Isabelle; Ferreira, Joana; Forkel, Renate; Vazhappilly Francis, Xavier; Grell, Georg; Grossi, Paola; Hansen, Ayoe B.; Miranda, Ana Isabel; Nopmongcol, Uarporn; Prank, Marje; Sartelet, Karine N.; Schaap, Martijn; Silver, Jeremy D.; Sokhi, Ranjeet S.; Vira, Julius; Werhahn, Johannes; Wolke, Ralf; Yarwood, Greg; Zhang, Junhua; Rao, S. Trivikrama; Galmarini, Stefano (2012-06)
      Ten state-of-the-science regional air quality (AQ) modeling systems have been applied to continental-scale domains in North America and Europe for full-year simulations of 2006 in the context of Air Quality Model Evaluation ...

    • Ozonesonde profiles from the West Pacific Warm Pool: measurements and validation 

      Newton, R.; Vaughan, G.; Ricketts, H.M.A.; Pan, L. L.; Weinheimer, A. J.; Chemel, C. (2016-01-20)
      We present a series of ozonesonde profiles measured from Manus Island, Papua New Guinea, during February 2014, with new insights on the calibration of ozonesondes for measurements in the tropical troposphere. The experiment ...

    • Pollutant dispersion in a developing valley cold-air pool 

      Chemel, C.; Burns, Paul (2015-03-01)
      Pollutants are trapped and accumulate within cold-air pools, thereby affecting air quality. A numerical model is used to quantify the role of cold-air-pooling processes in the dispersion of air pollution in a developing ...

    • Predictions of UK regulated power station contributions to regional air pollution and deposition : A model comparison exercise 

      Chemel, C.; Sokhi, Ranjeet S.; Dore, Anthony J.; Sutton, Paul; Vincent, K.J.; Griffiths, Stephen J.; Hayman, Garry D.; Wright, Raymond D.; Baggaley, Matthew; Hallsworth, Stephen; Prain, H. Douglas; Fisher, Bernard E. A. (2011-11)
      Contributions of the emissions from a U.K. regulated fossil-fuel power station to regional air pollution and deposition are estimated using four air quality modeling systems for the year 2003. The modeling systems vary in ...

    • Production of ozone in the Chamonix Valley (France) 

      Chaxel, E.; Chollet, J.P.; Brulfert, G.; Chemel, C. (2005)

    • Quantifying the imprint of a severe Hector thunderstorm during ACTIVE/SCOUT-O3 onto the water content in the upper troposphere/lower stratosphere 

      Chemel, C.; Russo, M.R.; Pyle, J.A.; Sokhi, R.S.; Schiller, C. (2009)
      The development of a severe Hector thunderstorm that formed over the Tiwi Islands, north of Australia, during the Aerosol and Chemical Transport in Tropical Convection/Stratospheric-Climate Links with Emphasis on the Upper ...

    • Regional air quality models and the regulation of atmospheric emissions 

      Fisher, Bernard E. A.; Chemel, C.; Sokhi, Ranjeet S.; Vazhappilly Francis, Xavier; Vincent, Keith J.; Dore, Anthony J.; Griffiths, Stephen J.; Sutton, Paul; Wright, Raymond D. (2015-09-01)
      This paper investigates regional air quality model performance and the regulation of atmospheric emissions. Although evaluation of regional models cannot be reduced to a set of rules, the paper shows ways of developing ...

    • Representation of tropical deep convection in atmospheric models - Part 1 : Meteorology and comparison with satellite observations 

      Russo, M.R.; Marecal, V.; Hoyle, C.R.; Arteta, J.; Chemel, C.; Chipperfield, M.P.; Dessens, O.; Feng, W.X.; Hosking, J.S.; Telford, P.J.; Wild, O.; Yang, X.; Pyle, J.A. (2011)
      Fast convective transport in the tropics can efficiently redistribute water vapour and pollutants up to the upper troposphere. In this study we compare tropical convection characteristics for the year 2005 in a range of ...

    • Representation of tropical deep convection in atmospheric models - Part 2: Tracer transport 

      Hoyle, C. R.; Marecal, V.; Russo, M. R.; Allen, G.; Arteta, J.; Chemel, C.; Chipperfield, M. P.; D'Amato, F.; Dessens, O.; Feng, W.; Hamilton, J. F.; Harris, N. R. P.; Hosking, J. S.; Lewis, A. C.; Morgenstern, O.; Peter, T.; Pyle, J. A.; Reddmann, T.; Richards, N. A. D.; Telford, P. J.; Tian, W.; Viciani, S.; Volz-Thomas, A.; Wild, O.; Yang, X.; Zeng, G. (2011)
      The tropical transport processes of 14 different models or model versions were compared, within the framework of the SCOUT-O3 (Stratospheric-Climate Links with Emphasis on the Upper Troposphere and Lower Stratosphere) ...

    • Response of London's urban heat island to a marine air intrusion in an easterly wind regime 

      Chemel, C.; Sokhi, Ranjeet S. (2012-07)
      Numerical simulations are conducted using the Weather Research and Forecast numerical model to examine the effects of a marine air intrusion (including a sea-breeze front), in an easterly wind regime on 7 May 2008, on the ...

    • A risk based application of the regional model CMAQ to policy decisions 

      Fisher, Bernard; Chemel, C.; Sokhi, Ranjeet; Timmis, Roger (2016-01)
      A risk based approach to assessing compliance with EU limit values is described, using the advanced chemical transport model CMAQ to determine the regional component of NO2 and particulate matter under various conditions ...