Original scientific paper
MODELLING SURFACE OZONE DURING THE 2003 HEAT WAVE IN THE UK
M. Vieno
; The University of Edinburgh, King's Buildings, Edinburgh EH9 3JN, UK;Centre for Ecology and Hydrology, Penicuik, Midlothian EH26 9HF, UK
A.J. Dore
; Centre for Ecology and Hydrology, Penicuik, Midlothian EH26 9HF, UK
D.S. Stevenson
; The University of Edinburgh, King's Buildings, Edinburgh EH9 3JN, UK
R. Doherty
; The University of Edinburgh, King's Buildings, Edinburgh EH9 3JN, UK
M. Heal
; The University of Edinburgh, King's Buildings, Edinburgh EH9 3JN, UK
S. Reis
; Centre for Ecology and Hydrology, Penicuik, Midlothian EH26 9HF, UK
S. Hallsworth
; Centre for Ecology and Hydrology, Penicuik, Midlothian EH26 9HF, UK
L. Tarrasón
; Norwegian Meteorological Institute, .O. Box 43, N-0313 Oslo, Norway
P. Wind
; Norwegian Meteorological Institute, .O. Box 43, N-0313 Oslo, Norway
M.A. Sutton
; Centre for Ecology and Hydrology, Penicuik, Midlothian EH26 9HF, UK
Abstract
The EMEP Unified model, normally applied to the European domain at 50 km horizontal resolution, has been applied to
the UK at a finer resolution of 5 km. This new application is called EMEP4UK. The EMEP4UK model is driven by meteorology
from the Weather Research and Forecast model (WRF) and emissions from the National Atmospheric Emissions Inventory (NAEI).
The WRF model has been nudged every six hours using NCEP/NCAR GFS reanalysis in order to properly represent the ‘real’
meteorology observed during a particular time period. The present paper focuses on the simulation of surface ozone concentrations
during August 2003, when large parts of Europe, including the UK, experienced extremely high temperatures and surface ozone
concentrations.
The evaluation in this paper focuses on comparison of model results with measurements taken during the TORCH campaign in
August 2003, based in Writtle, SE England. EMEP4UK was able to accurately simulate most of the ozone peaks which occurred
during 2003 and in particular those during August. Measured maximum hourly means reached 130 pbb, while modelled values
reached 120 ppb. We conducted a series of model sensitivity runs, varying individual model parameters (e.g., temperature, isoprene,
precursor emissions, and ozone deposition) in order to isolate the sensitivity of ozone concentrations during the heat wave to each of
these. The two factors which control surface ozone concentration at Writtle have been found to be ozone dry deposition and NOx
emissions.
Keywords
Ozone; heat-wave; air pollution; health
Hrčak ID:
64168
URI
Publication date:
12.12.2008.
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