Dr Xavier Vazhappilly Francis

Dr Xavier Vazhappilly Francis

Senior Software Developer- Server-side Programming (Linux)



2015-Present   Senior Software Developer (UAE-Ocean Project)

2008-2015 Air pollution and Meteorological Modeller at University of Hertfordshire
2004-2008 PhD Atmospheric Physics (IIT Kharagpur, India)


Phd Atmospheric Sciences

Teaching interests


Atmospheric Modelling

Research interests

Overthe past seven years his research has to provide a better understanding andmodelling of atmospheric processes that drive the destiny of atmosphericcomponents and their impacts on environment, human health and future climate. This involves theoretical modelling,analysis of detailed numerical model simulations of physical processes, anddirect analyses of observations. This work underpins the development ofstate-of-the-science numerical models, which integrate understanding of thevarious processes. In the current position he develops modelvalidation strategies, data assimilation methodologies in NEMO model and maintainssoftware on the HPC cluster forming part of the UAEOcean project funded by thegovernment of the United Arab Emirates.

Dr Xavier Francis has been involved inseveral national and international research collaborations. He co-ordinatedand lead the WRF-CMAQ air quality forecasting system funded by NCAS ( https://sci.ncas.ac.uk/airquality/ ),UK (July 2014 – July 2015). He worked as Co-principal Investigator of the CMAQdevelopment for National modelling at the University of Hertfordshire incollaboration with Kings College, London, which co-ordinated by RICARDO-AEA andfunded by DEFRA (2011-2015). He had experience in working with Europeancommission FP7 projects such as MEGAPOLI ( http://megapoli.dmi.dk/ ) co-ordinatedby DMI, Denmark, (2008-2010) and TRANSPHORM ( http://www.transphorm.eu/ ) co-ordinatedby University of Hertfordshire, UK, 2009-2014 as a primary contact for regionalmesoscale modelling. He worked closely with Environment Agency, UK byparticipating in CREMO ( http://www.cremo.org/ ) andestimates using the comprehensive model CMAQ of PM2.5 reductions under futureregulation project. He actively participated in DEFRA’s Model Inter-comparison Exerciseas well as in Air Quality Modelling Evaluation International Initiatives (AQMEII, http://aqmeii.jrc.ec.europa.eu/ )which promote research on regional air quality model evaluation across Europeanand North American atmospheric modelling communities.

Marje Prank,Mikhail Sofiev, Svetlana Tsyro, Carlijn Hendriks, Valiyaveetil Semeena, XavierVazhappilly Francis, Tim Butler, HugoDenier van der Gon, Rainer Friedrich, Johannes Hendricks, XinKong, Mark Lawrence, Mattia Righi, Zissis Samaras, Robert Sausen, JaakkoKukkonen, and Ranjeet Sokhi Evaluation of the performance of four chemicaltransport models in predicting the aerosol chemical composition in Europe in2005, Atmos. Chem. Phys, 16, pp 6041-6070, 2016

BernardE.A. Fisher., Charles Chemel , Ranjeet S. Sokhi , Xavier V. Francis ,Keith J. Vincent , Anthony J. Dore , Stephen Griffiths ,Paul Sutton , andRaymond D. Wright ; Regional air quality models and the regulation ofatmospheric emissions, Quarterly Journal of the Hungarian MeteorologicalService Vol. 119, No. 3, 2015, pp. 355–378

Derwent, R. G.; Beevers, S.; Chemel, C.;Cooke, S.; Francis, X. V. ; Fraser, A.; Heal, M. R.; Kitwiroon, N.; Lingard, J.; Redington, A.; Sokhi, R.S.; Vieno, M.; Analysis of  UK  and European  NOx  and VOC  emission scenarios  in the  Defra  model intercomparison exercise. Atmos. Environ., 94, 249Q257, 2014

Chemel, C.; Fisher, B. E. A.; Kong, X.; Francis, X. V . ; Sokhi, R. S.;Good, N.; Collins,  W.  J.; Folberth, G.  A.; Application  of chemical  transport  model CMAQ  to  policy decisions  regarding  PM2.5 in  the  UK.  Atmos.Environ.,  82, 410Q417, [doi:10.1016/j.atmosenv.2013.10.001] 2014

Solazzo,  E.; Bianconi,  R.;  Pirovano, G.;  Moran,  M.  D.;  Vautard, R.;  Hogrefe,  C.; Appel,  K.  W.; Matthias,  V.; Grossi,  P.; Bessagnet,  B.;  Brandt, J.;  Chemel,  C.; Christensen,  J.  H.; Forkel,  R.;  Francis,  X.  V . ;  Hansen, A.  B.; McKeen,  S.; Nopmongcol, U.; Prank, M.; Sartelet, K. N.; Segers, A.; Silver, J. D.;Yarwood, G.;  Werhahn,  J.; Zhang, J.;  Rao,  S.  T.; Galmarini,  S.;  Evaluating the  capability  of regional scale air quality models to capture the vertical distributionof pollutants.  Geosci. Model Dev., 6,791Q818, [doi:10.5194/gmdQ6Q791Q2013] 2013

Solazzo,  E.; Bianconi,  R.;  Pirovano, G.;  Matthias,  V.; Vautard,  R.;  Moran, M.  D.;  Appel, K.  W.;  Bessagnet, B.;  Brandt,  J.; Christensen,  J.  H.; Chemel,  C.;  Coll, I.;  Ferreira, J.; Forkel, R.; Francis, X. V . ; Grell, G.; Grossi, P.; Hansen, A. B.; Miranda,  A. I.; Nopmongcol, U.; Prank, M.; Sartelet,K. N.; Schaap, M.; Silver, J. D.; Sokhi, R. S.; Vira, J.; Werhahn, J.; Wolke, R.; Yarwood, G.; Zhang, J.; Rao, S.T.; Galmarini, S.;  Operational modelevaluation for particulate matter in Europe and North America  in the  context  of the  AQMEII  project. Atmos.Environ.  75Q92,  [doi:10.1016/j.atmosenv.2012.02.045] 2012

Solazzo,  E.; Bianconi,  R.;  Vautard, R.;  Appel,  K. W.;  Moran,  M. D.;  Hogrefe,  C.; Bessagnet,  B.;  Brandt, J.;  Christensen,  J. H.;  Chemel,  C.; Coll,  I.;  Denier van  der  Gon, H.; Ferreira, J.; Forkel, R.; Francis, X. V. ; Grell, G.; Grossi, P.;Hansen, A. B.;  Jericevic, A.; Kraljevic,L.; Miranda, A. I.; Nopmongcol, U.; Pirovano, G.; Prank, M.;  Riccio, A.; Sartelet, K. N.; Schaap, M.;Silver, J. D.; Sokhi, R. S.; Vira, J.; Werhahn, J.;  Wolke, R.; Yarwood, G.; Zhang, J.; Rao, S.T.; Galmarini, S.; Model evaluation and ensemble  modelling  of surfaceQlevel  ozone  in Europe and  North  America in  the  context of AQMEII. Atmos. Environ. 60Q74,[doi:10.1016/j.atmosenv.2012.01.003] 2012

Appel, K. W.;Chemel, C.; Roselle, S. J.; Francis, X. V . ; Hu, R. QM.; Sokhi, R.S.; Rao,  S. T.; Galmarini, S.;Examination of the Community Multiscale Air Quality (CMAQ)  model performance  over  the North  American  and European  domains.  Atmos. Environ., 53, 142Q155, [doi:10.1016/j.atmosenv.2011.11.016] 2012

Francis, X. V . ; Chemel, C.; Sokhi, R. S.; Norton, E. G.; Ricketts, HMA; Fisher, B.E.  A.;  Mechanisms responsible  for  the build-up  of  ozone over  South  East England  during  the August  2003  heatwave. Atmos.  Environ., 45, 6880Q6890, [doi:10.1016/j.atmosenv.2011.04.035]2011

V. F. Xavier , A. Chandrasekar, HasiburRahman, Dev Niyogi and K.  Alapaty;  The effect  of  satellite and  conventional  meteorological  data assimilation  on  the mesoscale modeling of monsoon depressionsover India, Meteorological and Atmospheric Physics (DOI: 10.1007/s00703Q008Q0314Q7) 2008

V. F. Xavier , A. Chandrasekar  and  Devendra Singh;  The  impact of  assimilation  of satellite  derived  wind observations  for  the prediction  of  a monsoon  depression over Indiausing a mesoscale model, International Journal of Remote Sensing, 29,  no. 24, 7225 – 7250, 2008

V. F.  Xavier , A. Chandrasekar, R. Singh and B. Simon;  The impact  of  assimilation of  MODIS  data for  the  prediction of a  tropical  low pressure system over India using a mesoscale model : Int. J Rem Sens.27:4655Q 4676. 2006.

V. F. Xavier , A. Chandrasekar, B. Simon; The effect ofassimilation of satellite and regular meteorological data for the prediction ofa well-marked low pressure over Arabian Sea using a mesoscale model, IJED4:15Q29, 2006.

V. F. Xavier , S. Sandeep, A. Chandrasekar, B. Simon; Impactof assimilation of  MODIS  and IMD  data  on the  prediction  of tropical  cyclones  using a  mesoscale  model (2006) J. Mar. Atmos. Res, 3: 29Q58,2006.