EGU2020-19775, updated on 02 Dec 2024
https://doi.org/10.5194/egusphere-egu2020-19775
EGU General Assembly 2020
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Evaluating Tropospheric Nitrogen Dioxide over South and East Asia in UKCA using OMI Satellite data

Alok Pandey1, David Stevenson1, Alcide Zhao1, Richard Pope2, and Krishan Kumar3
Alok Pandey et al.
  • 1School of GeoSciences, The University of Edinburgh, Edinburgh, UK
  • 2School of Earth and Environment, University of Leeds, Leeds, UK
  • 3School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India

We compare tropospheric nitrogen dioxide (NO2) in the United Kingdom Chemistry and Aerosol (UKCA) model v11.0 with satellite measurements from NASA Earth Observing System (EOS) Aura satellite Ozone Monitoring Instrument (OMI) troposphere NO2 data over South and East Asia (S/A). UKCA is the atmospheric composition component of the UK Earth System Model (UKESM). UKCA has been run on ARCHER (UK National Supercomputing Service) with (a) nudged hourly outputs over S/A as well as monthly outputs globally and (b) free run monthly globally output for 2005-2015. OMI satellite Averaging Kernels (AK) has been applied on the model hourly outputs for accurate model satellite comparison for 2005 - 2015. OMI and UKCA data has been analysed spatially and temporally. Background UKCA and OMI tropospheric column NO2 typically ranges between 0-3 x 1015 molecules/cm2. Model is overestimating tropospheric NO2 over the S/A predominantly during winter by a factor of ~2.5. 

How to cite: Pandey, A., Stevenson, D., Zhao, A., Pope, R., and Kumar, K.: Evaluating Tropospheric Nitrogen Dioxide over South and East Asia in UKCA using OMI Satellite data, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-19775, https://doi.org/10.5194/egusphere-egu2020-19775, 2020.