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SUMMARY:Using and Developing the Weather Research and Forecasting model wi
 th Chemistry (WRF-Chem) - Dr Scott Archer-Nicholls\, Cambridge University
DTSTART:20170320T141500Z
DTEND:20170320T151500Z
UID:TALK70629@talks.cam.ac.uk
CONTACT:Paul Griffiths
DESCRIPTION:Short-lived pollutants in the troposphere\, including carbon m
 onoxide\, volatile organic compounds\, oxides of nitrogen\, and particulat
 e matter\, have many impacts on air-quality\, human health and climate\, a
 cting from regional to global scales. Exposure to fine particulate matter 
 is linked with serious cardio-pulmonary health outcomes\, causing an estim
 ated 5.5 million premature deaths per year globally. Aerosol particles can
  be directly emitted from many anthropogenic and natural sources\, or form
 ed in the atmosphere through complex multiphase chemistry. Tropospheric ae
 rosol also affects the radiative budget\, both directly through scattering
  and absorbing radiation\, and indirectly through influencing cloud proper
 ties. To fully simulate these processes\, it is necessary to conduct onlin
 e 3D simulations\, whereby the chemical and aerosol model components are i
 ntegrated at the same time as the physical components\, enabling represent
 ation of feedbacks.  Due to the spatial heterogeneity of short-lived speci
 es\, and the complex interactions with clouds and other multiphase process
 es\, it can be beneficial to compliment global simulations with nested hig
 h-resolution regional models. \n\nThis talk presents three applications to
  use and develop the regional\, ‘online’\, Weather Research and Foreca
 sting model with Chemistry (WRF-Chem\, https://ruc.noaa.gov/wrf/wrf-chem/)
  to tackle various scientific problems in different environments. The firs
 t looks at night-time chemistry over UK\, in particular the NO3 radical\, 
 it’s dependency on N2O5 heterogeneous chemistry\, and its importance for
  the nighttime oxidation budget. The second focuses on the radiative effec
 ts of biomass burning emissions in Brazil\, using high-resolution nested d
 omains to investigate aerosol-radiation-cloud interactions. Finally\, we a
 pplied WRF-Chem to investigate the impacts of residential combustion emiss
 ions on air quality and health in China\, and the local radiative effects 
 of this high black-carbon source. Lessons learnt from these studies and fu
 ture directions will be further discussed.\n
LOCATION:Pfizer Lecture Theatre\, Department of Chemistry
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