Project Principal Investigators (PIs)

Lead UK PI: Professor Ranjeet Sokhi (University of Hertfordshire)
Lead Indian PI: Dr. Gufran Beig (Indian Institute of Tropical Meteorology (IITM))

UK Principal Investigating Partners

  • Ranjeet Sokhi (PI) - is Director of the Centre for Atmospheric and Instrumentation Research (CAIR) and a PI for NCAS. He has nearly 200 publications in major international journals, conference proceedings and reports. His research is focussed on physical and chemical processes affecting air quality and its impacts on local to regional scales. He coordinates UK air quality forecasting for NCAS ( with WRF-CMAQ and has coordinated or participated in more than 25 multi-partner projects funded by NERC, EC, UK Government and Industry. He is an advisor for DEFRA, WHO, PHE and is the chair of the International Conferences on Air Quality. He is a member of the UK Government’s Air Quality Modelling Steering Group. In addition to acting as the joint PI (with Beig) for promote, Sokhi will also lead the integration of modelling prediction and analysis across the APHH programme.
  • Charles Chemel is a member of CAIR and an NCAS Atmospheric Physics Researcher with research interests in interactions between air quality and boundary layer processes based on field observations and modelling analysis with WRF-CMAQ and WRF-Chem. He is developing the NCAS National Capability Programme on Boundary Layer Processes, focussing on stable boundary layers, haze and fog.

  • Gordon McFiggans has 153 peer-reviewed publications. His current and recent projects include 8 NERC consortia, 2 EU consortia and one EU Network of Infrastructures. He has expertise in regional multiphase chemistry modelling of gas-particle processes. His team is responsible for the atmospheric chemical forecast capability in the ManUniCast educational resource ( He led a Defra-funded review of secondary aerosols (2015).
  • Hugh Coe is Professor of Atmospheric Composition with over 20 years’ experience in measuring the physical and chemical characterisation of aerosol particles. He has published 208 peer reviewed publications and currently holds 10 research grants. He is currently the NCAS member of the FAAM Aircraft Operations Committee. He is the PI of the VOCALS-UK and is NCAS Co-Director for airborne measurements and the Project PI for the NERC SAMBBA consortium project.
  • David Topping is NCAS research scientist and senior research fellow with extensive expertise in developing numerical aerosol models across scales. He has been PI for 7 NERC grants and is CoI on 10. He has 48 peer-reviewed papers and a book chapter on aerosol thermodynamics.
  • Paul Williams is NCAS AMF instrument scientist with extensive experience in aerosol instrumentation. He has been PI on 10 grants and CoI on a further 14 and has 67 peer-reviewed publications.

  • Alex Archibald is a member of NCAS Climate and is based at the Centre for Atmospheric Science. He specialises in the mechanisms of chemistry in the atmosphere, interactions between the biosphere and atmosphere and coupling between climate and atmospheric composition using observations and the UKCA chemistry-climate model, of which he sits on the executive committee.

  • Oliver Wild is Reader in Atmospheric Science and has more than 20 years’ experience in developing and applying models of atmospheric chemistry and transport. He has led or contributed to international assessments of atmospheric composition change via HTAP, ACCENT and IPCC. His interests include ozone and oxidants in Asia, regional and megacity air pollution, and he leads UK modelling contributions to the AIRPRO and AIRPOLL projects on air quality in Beijing.

  • Ruth Doherty is Professor in Atmospheric Sciences at Univ. Edinburgh with research interests in modelling atmospheric composition at regional and urban scales and impacts of air quality on human health. She is PI on NERC funded projects studying air pollution in London and Glasgow.

  • Martyn Chipperfield is a member of the Institute for Climate and Atmospheric Science. His research specialism is in analysis of satellite data and chemistry-climate interactions, satellite and regional aircraft/ground-based data, and WRF-Chem modelling, to quantify the contribution of long-range transport. He has participated in a number of NERC and EU funded projects and is a member of several committees of WMO/UNEP and NERC.
  • Ken Carslaw is the head of the Aerosol Research group and is the PI of the GLOMAP global aerosol model and the HadGEM-UKCA aerosol-climate model. His research interests are in aerosol model robustness and sensitivity and in uncertainty analysis of complex model predictions.

Indian Principal Investigating Partners

  • Gufran Beig (PI) has more than 30 years of experience in the impact of climate and air quality on health and changing climate. He and his team have developed India’s first System of Air Quality and Weather Forecasting and Research (SAFAR) for Delhi and other cities. As a project director for SAFAR, he has established an Early Warning System for health advisories, Environmental Information System (ENVIS) center and a framework to generate research outcomes for “National Air Quality Action Plan”.
  • Dilip Chate is a Deputy Chief Project Scientist and has experience of field measurements of aerosols distribution.

  • Sachin Gunthe is the head of group and is focused on investigating fundamental physical, chemical, and biological properties of atmospheric aerosols including biological aerosols and their interaction with the biosphere under contrasting environments over India. His research employs a combination of field measurements, mathematical models, and laboratory experiments.

  • Vikas Singh is a scientist with expertise in the use of WRF-Chem and WRF-CMAQ for air quality modelling and forecasting to study role of physical and chemical mechanisms on trace gases and aerosols and its impacts over the Indian region. He has worked with Prof. Sokhi to develop the NCAS air quality forecasting system for UK. Recently, as part of the NARL weather forecast team, he has developed air quality forecasting system for India ( for research and development.
  • Jyoti Bhate conducts research related to mesoscale modelling, atmospheric dynamics and real time weather forecasting. Developed assimilation techniques for 3DVAR, 4DVAR assimilation system and is involved in daily weather forecast activities and ISRO’s satellite launching activities.
  • Chaithanya D Jain is a Scientist at NARL and currently developing new instruments for measuring chemical species that are important for atmospheric chemistry research. He has research interests are atmospheric chemistry measurements and analysis.
  • Amit P Kesarkar heads the WCRG group at NARL. His research involves mesoscale dynamics, parameterizations in weather and climate models, High Performance Computing and development of real time NARL weather forecast (
  • Sunil Peshin is a meteorologist at the India Meteorological Department (Delhi) and actively collaborated with NARL. He has experience of air quality and meteorological observations. He will collaborate with NARL scientists on local logistics and measurements in Delhi.

  • Jyoti Kirit Parikh is the Executive Director of IRADe. Her Specialism is in developing methodology for socio-economic analysis, frameworks for calculating economic losses, designing scenarios for cost effective solutions and policy analysis & recommendations. Her experience spans local and global issues of urban infrastructure and sustainability, environment and climate change with emphasis on policy analysis.
  • Rohit Magotra is an Assistant Director with specialism in project execution, stakeholder engagement and consultations, technical and financial reporting, analysis of mitigation options, policy briefs and communication strategies. He is also experienced in air pollution, hazard management, urban resilience, environment & climate change, natural resource management & sustainable development, policy research and analysis & capacity building.
  • Sharad Verma is the Assistant Director of IRADe with experience in designing questionnaires, survey design, information collection and liaison, stakeholder consultations, mitigation options and interventions, organizing workshops.
  • Probal Ghosh is head of the modelling group with experience in econometric estimation of a planning model as an in house model of the perspective plan division for the 11th plan and policies relating to energy and economy.
  • Asha Kaushik is a research associate with expertise in resilient cities, natural resource management and climate change (mitigation, adaptation) and pollution research.
  • Mohit Kumar is Research associate in analysis of Fog/Smog data, spatial mapping of the areas affected by air pollution (NCR), identification of vulnerable locations and vulnerable groups, scientific analysis of data.
  • Ajit Tyagi will contribute to the impacts of air quality on health and policy analysis.
  • Pushkar Pandey will contribute on field questionnaires and socio-economic surveys.


  • David Carruthers is a director of Cambridge Environmental Research Consultants (CERC) and responsible for the development of the ADMS-Urban high-resolution model for urban air quality. He has wide experience applying this model and is participating in the CUREAIR and AIRPRO projects nesting urban and regional-scale models. He is a member of the UK Government’s Air Quality Expert Group (AQEG) and recently of its Air Quality Modelling Steering Group.

Other Project Partners

  • Fiona O'Connor is the Scientific Manager of the Atmospheric Composition and Climate Team at the Met Office's Hadley Centre and is involved in the development of the UK Chemistry and Aerosol model, UKCA. Her interests are in global and regional atmospheric composition, chemistry-climate interactions and Earth System feedbacks.

  • Georg A Grell is a senior scientist in NOAA’s Earth Modelling Branch. He has been the pioneer of online coupled models, especially the development of WRF-Chem. He has collaborated previously with Sokhi, under the COST 728 Action on mesoscale modelling.

  • Rahul A Zaveri is a scientist at the Atmospheric Science and Global Change Division of PNNL. He is involved in the development of aerosol process representations into a range of global and regional models including WRF-Chem and has implemented a Volatility Basis Set (VBS) scheme in MOSAIC in order to represent size resolved secondary organic aerosol formation and transformation. He actively collaborates with McFiggans on aerosol representation in models.

  • Rohit Mathur is the head of the Computation Exposure Division at the USEPA. He and his team have developed the CMAQ model which is used world-wide for air quality research and assessment. He has been collaborating with Sokhi on improving the performance of CMAQ especially for fine particulate matter.

  • Alexander Baklanov has been leading the international development of online coupled models for many years. He was the coordinator of COST Action ES1004 on online coupled models and was the lead on FP7 project MEGAPOLI. He has recently been involved in developing and improving air quality forecasting capability for cities as part of the WMO/GURME programme including Delhi. Baklanov and Sokhi have been collaborating on the use of multiscale air quality modelling as part of FP7 projects, MEGAPOLI and TRANSPHORM, and Cost Actions 728 and ES1004.