Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
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TY - JOUR
T1 - Downscaling global anthropogenic emissions for high-resolution urban air quality studies
AU - Valencia, Victor H.
AU - Levin, Gregor
AU - Ketzel, Matthias
PY - 2022/10
Y1 - 2022/10
N2 - This study presents a method for “downscaling” aggregated global emissions of CO, NOx, and PM2.5 based on georeferenced information (spatial proxies). We distribute ECLIPSE-CLE emissions for Quito, Ecuador, in 2015 and 2017. The study area is a grid of 0.5 × 0.5 km2 cells over a 110 × 110 km2 area. The emission sectors (proxies in parenthesis) are agricultural (land-use maps), domestic (land-use and population density), energy, industry, and waste disposal (point source location from local inventory), and transport (population, vehicle traffic, and road density). Emission distribution quality is satisfactorily evaluated (graphically and statistically) by implementing them in the UBM model and comparing modeled concentrations with observations. This study also explores an alternative proxy set-up for main road emissions based on road density, which, for some modeling sites, results in a better agreement with the observations. Finally, this methodology is applied for comparing air pollution due to two urban growth types for Quito in 2040: sprawl and densification. Both scenarios lead to lower concentrations than in 2017, except for O3. Although the two scenarios attain similar concentrations, urban sprawl presents, in general, noticeably higher values for NOx and NO2.
AB - This study presents a method for “downscaling” aggregated global emissions of CO, NOx, and PM2.5 based on georeferenced information (spatial proxies). We distribute ECLIPSE-CLE emissions for Quito, Ecuador, in 2015 and 2017. The study area is a grid of 0.5 × 0.5 km2 cells over a 110 × 110 km2 area. The emission sectors (proxies in parenthesis) are agricultural (land-use maps), domestic (land-use and population density), energy, industry, and waste disposal (point source location from local inventory), and transport (population, vehicle traffic, and road density). Emission distribution quality is satisfactorily evaluated (graphically and statistically) by implementing them in the UBM model and comparing modeled concentrations with observations. This study also explores an alternative proxy set-up for main road emissions based on road density, which, for some modeling sites, results in a better agreement with the observations. Finally, this methodology is applied for comparing air pollution due to two urban growth types for Quito in 2040: sprawl and densification. Both scenarios lead to lower concentrations than in 2017, except for O3. Although the two scenarios attain similar concentrations, urban sprawl presents, in general, noticeably higher values for NOx and NO2.
UR - http://www.scopus.com/inward/record.url?scp=85137302571&partnerID=8YFLogxK
U2 - 10.1016/j.apr.2022.101516
DO - 10.1016/j.apr.2022.101516
M3 - Journal article
AN - SCOPUS:85137302571
VL - 13
JO - Atmospheric Pollution Research
JF - Atmospheric Pollution Research
SN - 1309-1042
IS - 10
M1 - 101516
ER -