Imperial College London
Portrait Picture

DrDavidDajnak

Faculty of Medicine, School of Public Health

Deputy Head of ERG Modelling Group
 
 
 
//

Contact

 

d.dajnak

 
 
//

Location

 

Sir Michael Uren HubWhite City Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Drysdale:2022:10.5194/acp-22-9413-2022,
author = {Drysdale, WS and Vaughan, AR and Squires, FA and Cliff, SJ and Metzger, S and Durden, D and Pingintha-Durden, N and Helfter, C and Nemitz, E and Grimmond, CSB and Barlow, J and Beevers, S and Stewart, G and Dajnak, D and Purvis, RM and Lee, JD},
doi = {10.5194/acp-22-9413-2022},
journal = {Atmospheric Chemistry and Physics},
pages = {9413--9433},
title = {Eddy covariance measurements highlight sources of nitrogen oxide emissions missing from inventories for central London},
url = {http://dx.doi.org/10.5194/acp-22-9413-2022},
volume = {22},
year = {2022}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - During March–June 2017 emissions of nitrogen oxides were measured via eddy covariance at the British Telecom Tower in central London, UK. Through the use of a footprint model the expected emissions were simulated from the spatially resolved National Atmospheric Emissions Inventory for 2017 and compared with the measured emissions. These simulated emissions were shown to underestimate measured emissions during the daytime by a factor of 1.48, but they agreed well overnight. Furthermore, underestimations were spatially mapped, and the areas around the measurement site responsible for differences in measured and simulated emissions were inferred. It was observed that areas of higher traffic, such as major roads near national rail stations, showed the greatest underestimation by the simulated emissions. These discrepancies are partially attributed to a combination of the inventory not fully capturing traffic conditions in central London and both the spatial and temporal resolution of the inventory not fully describing the high heterogeneity of the urban centre. Understanding of this underestimation may be further improved with longer measurement time series to better understand temporal variation and improved temporal scaling factors to better simulate sub-annual emissions.
AU  - Drysdale,WS
AU  - Vaughan,AR
AU  - Squires,FA
AU  - Cliff,SJ
AU  - Metzger,S
AU  - Durden,D
AU  - Pingintha-Durden,N
AU  - Helfter,C
AU  - Nemitz,E
AU  - Grimmond,CSB
AU  - Barlow,J
AU  - Beevers,S
AU  - Stewart,G
AU  - Dajnak,D
AU  - Purvis,RM
AU  - Lee,JD
DO  - 10.5194/acp-22-9413-2022
EP  - 9433
PY  - 2022///
SN  - 1680-7316
SP  - 9413
TI  - Eddy covariance measurements highlight sources of nitrogen oxide emissions missing from inventories for central London
T2  - Atmospheric Chemistry and Physics
UR  - http://dx.doi.org/10.5194/acp-22-9413-2022
UR  - https://acp.copernicus.org/articles/22/9413/2022/
UR  - http://hdl.handle.net/10044/1/98603
VL  - 22
ER  -
Download