Recent Research:
1) Global Chemistry-Climate Modeling
Ojha, N. et al., Secondary ozone peaks in the troposphere over the Himalayas, Atmos. Chem. Phys. Discuss., 2016 Link to PDF
2) Regional Chemistry Transport Modeling
a) For South Asian Region
Ojha, N. et al., Ozone and carbon monoxide over India during the summer monsoon: regional emissions and transport, Atmos. Chem. Phys., 2016. Link to PDF
Sharma, A*., Ojha, N*. et al.: WRF-Chem simulated surface ozone over South Asia during the pre-monsoon: Effects of emission inventories and chemical mechanisms, Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2016-1083, in review, 2016. Link to PDF
Girach, I.*, Ojha, N*. et al.: Variations in O3, CO, and CH4 over the Bay of Bengal during the summer monsoon season: shipborne measurements and model simulations, Atmos. Chem. Phys., 17, 257-275, doi:10.5194/acp-17-257-2017, 2017. Link to PDF
b) For European Region
Mar. K. A., Ojha, N., Pozzer A., and T. M. Butler, Ozone air quality simulations with WRF-Chem (v3.5.1) over Europe: model evaluation and chemical mechanism comparison, Geosci. Model Dev., 9, 3699-3728, doi:10.5194/gmd-9-3699-2016, 2016. Link to PDF
Research work during PhD:
1) Balloon-borne measurements
Ojha, N. et al., On the processes influencing the vertical distribution of ozone over the central Himalayas: Analysis of yearlong ozonesonde observations, Atmospheric Environment, 2014. contact me for PDF file
2)Ground-based measurements and Chemical Box Modeling
Ojha, N. et al., Variabilities in ozone at a semi-urban site in the Indo-Gangetic Plain region: Association with the meteorology and regional processes, J. Geophys. Res., 2012.contact me for PDF file