TY - JOUR
T1 - Influence of high-model grid resolution on photochemical modelling in very complex terrains
AU - Jiménez, Pedro
AU - Jorba, Oriol
AU - Parra, René
AU - Baldasano, José M.
PY - 2005
Y1 - 2005
N2 - The study of photochemical pollution in very complex terrains, such as the Northeastern Iberian Peninsula (NEIP), is primarily influenced by local topography. This kind of study demands a high spatial resolution. In order to illustrate the influence of the grid resolution on tropospheric ozone levels, several simulations were carried out with MM5-EMICAT2000-CMAQ model using horizontal resolutions ranging from 8, 4 and 2 km and with 6 or 16 vertical layers during an episode of photochemical pollution (13-16 August 2000). High resolutions lead to improve discrete and categorical statistical parameters when evaluating the model against meteorological and air quality data. Results show that coarser grids tend to present a homogeneous and smoothened behaviour of wind flows. Also, results do not manage to describe the particularities of the circulations of the region. Coarser simulations underestimate maximum ozone levels since the grid resolution highly influences the formation and loss processes of ozone.
AB - The study of photochemical pollution in very complex terrains, such as the Northeastern Iberian Peninsula (NEIP), is primarily influenced by local topography. This kind of study demands a high spatial resolution. In order to illustrate the influence of the grid resolution on tropospheric ozone levels, several simulations were carried out with MM5-EMICAT2000-CMAQ model using horizontal resolutions ranging from 8, 4 and 2 km and with 6 or 16 vertical layers during an episode of photochemical pollution (13-16 August 2000). High resolutions lead to improve discrete and categorical statistical parameters when evaluating the model against meteorological and air quality data. Results show that coarser grids tend to present a homogeneous and smoothened behaviour of wind flows. Also, results do not manage to describe the particularities of the circulations of the region. Coarser simulations underestimate maximum ozone levels since the grid resolution highly influences the formation and loss processes of ozone.
KW - Air quality modelling
KW - Grid resolution
KW - Model evaluation
KW - Very complex terrains
UR - http://www.scopus.com/inward/record.url?scp=23844471305&partnerID=8YFLogxK
U2 - 10.1504/IJEP.2005.007393
DO - 10.1504/IJEP.2005.007393
M3 - Artículo
AN - SCOPUS:23844471305
SN - 0957-4352
VL - 24
SP - 180
EP - 200
JO - International Journal of Environment and Pollution
JF - International Journal of Environment and Pollution
IS - 1-4
ER -