Sachchida Nand Tripathi

PhD (Reading University, UK)

Email: snt[AT]iitk.ac.in

Office Phone: 0512-259-7845

Professor
Department of Civil Engineering with Joint appointment in Department of Sustainable Energy Engineering

Specialization

Air Quality, Climate Change

Research Interest

Aerosol Science and Technology, Low-Cost Sensors for Air Quality Monitoring, Air pollution source identification in near real-time, Aerosol-Land Use-Rainfall-Climate coupling, Large-Scale Chamber Aerosol Experiments for Reactor Safety.

Education

PhD, (Environmental Engineering), University of Reading, UK (2000)
M.Tech, (Environmental Engineering), MNIT-Allahabad (1995)
B.Tech, (Civil Engineering), IIT-BHU (1992)

Website(s)

Homepage

CV

+ - Teaching Area Click to collapse

Air Pollution and its Control
Earth and Environment
Atmospheric Physics and Chemistry
Fate and Transport of Contaminants in Natural Systems
Environmental Quality and Pollution
Computational Methods in Engineering
Advanced Mathematics for Civil Engineers
Modeling of Natural Systems

+ - Recent Publications Click to collapse

Talukdar, S., S.N. Tripathi et al., 2021, Air Pollution in New Delhi during Late Winter: An Overview of a Group of Campaign Studies Focusing on Composition and Sources, Atmosphere, 12, 1432, DOI: 10.3390/atmos12111432.
Ginn, O., S.N. Tripathi et al., 2021, Detection and quantification of enteric pathogens in aerosols near open wastewater canals in cities with poor sanitation, Environmental Science and Technology, 55, 14758-14771, DOI: 10.1101/2021.02.14.21251650.
Khattri, P., S.N. Tripathi et al., 2021, Aerosol Loading and Radiation Budget Perturbations in Densely Populated and Highly Polluted Indo-Gangetic Plain by COVI D-19: Influences on Cloud Properties and Air Temperature, Geophysical Research Letters, 48, DOI: 10.1029/2021GL093796.
Jha, S.K., Mohit Kumar, S.N. Tripathi, et al., 2021, Domain adaptation based deep calibration of low-cost PM2.5 sensors, IEEE Sensor Journal, DOI: 10.1109/JSEN.2021.3118454.
Thamban, N., S.N. Tripathi et al., 2021, Evolution of size and composition of fine particulate matter in the Delhi megacity during later winter, Atmospheric Environment, 207, 118752, DOI: 10.1016/j.atmosenv.2021.118752
Niranjan, R., K.P. Mishra, S.N. Tripathi and A.K. Thakur, 2021, Proliferation of lung Epithelial cells is regulated by the mechanisms of autophagy upon exposure of soots, Frontiers in Cell and Developmental Biology, 9:662597, DOI: 10.3389/fcell.2021.662597.
Shukla, A.K., V. Lalchandani, S.N. Tripathi et al., 2021, Real-time quantification and source apportionment of fine particulate matter including organics and elements in Delhi during summertime, Atmospheric Environment, 261, 118598, DOI: 10.1016/j.atmosenv.2021.118598.
Rastogi, N., Rangu Satish, S.N. Tripathi et al., 2021, Diurnal variability in the spectral characteristics and sources of water-soluble brown carbon aerosols over Delhi, Science of the Total Environment, 794, 148589, DOI: 10.1016/j.scitotenv.2021.148589.
Mishra, G., S.N. Tripathi et al., 2021, Interaction of cesium bound fission product compounds (CsI and CsOH) with abundant inorganic compounds of atmosphere: Effect on hygroscopic growth properties, Journal of Hazardous Materials, 418, 126356, DOI: 10.1016/j.jhazmat.2021.126356.
Ghosh K., S.N. Tripathi et al., 2021, Effect of charge on aerosol microphysics of particles emitted from a hot wire generator: Theory and experiments, Aerosol Science & Technology, DOI: 10.1080/02786826.2021.1931011.

+ - Research Group Click to collapse

Current Ph.D. Students
Ashutosh Shukla	Cont.	Source apportionment using UMR and PMF and network analysis
Sidyant Kumar Rao (Jointly with Dr. Sanjay Kumar, AE)	Cont.	Study of shock wave and droplet interaction
Manish Kumar	Cont.	Study of Aerosol deposition in piping system during severe nuclear accident and its validation with ASTEC
Vipul Lalchandani	Cont.	Vipul Lalchandani Cont. Chemical characterization of particulate matter, and understanding organic aerosol sources and evolution at downwind location of Delhi during winter season
Suneeti Mishra	Cont.	Aerosol size distribution and chemical analysis in Indian cities
Mithun Krishnan K.V.	Cont.	Seasonal and annual variations of surface energy fluxes, parameters and it’s modeling using weather research forecast models over Indo-Gangetic basin
Himadri Sekhar Bhowmik	Cont.	Chemical characterization and source appointment of aerosols using real time instruments
Vaishali Jain	Cont.	Chemical characterization and source appointment of aerosols using real-time instruments
Current M.Tech. Students
Parmesh Lawani	Cont.	Calibration of low cost sensor
Himanshu Patel	Cont.	Source Apportionment
Ravi Prakash Maurya	Cont.	WRF-Chem Modelling
Sant Kumar Jha	Cont.	WRF-Chem Modelling

Project Members

Veerendra Sahu	Post Doc Fellow	Air quality monitoring using low cost sensor of Delhi.
Sandeep Madhwal	Post Doc Fellow	Air quality monitoring using low cost sensor in Lucknow
Mohit Kumar	Post Doc Fellow	Deep learning based calibration of air quality sensors
Vishnu Murari	Post Doc Fellow	Identification of aerosol source at different locations in India
Shamitaksha Talukdar	Post Doc Fellow	Source apportionment study in Delhi
P. Pranav Kumar	Project Associate	Calibration of air quality sensors
Amit Vishvakarma	Project Associate	Calibration of air quality sensors
Ravi Sahu	Post Doc
Harish C. Vishwakarma	Assistant Project Manager	AERONET and MPLNET site maintenance, Technical work and official work for Projects.
Hari Shankar	Sr. Project Mechanic	Technical work and official work for Project and Lab.

Past Members

Ph.D. Thesis Student

Gaurav Mishra	2021	Growth characteristics of cesium compound aerosols under various saturation conditions. Current position: Research Associate under my guidance in Department of Civil Engineering Indian Institute of Technology-Kanpur
Kunal Ghosh	2021	Role of ion in aerosol microphysical processes (modeling and experimental studies). Current position: Postdoctoral Fellow, under my guidance in Department of Civil Engineering, Indian Institute of Technology-Kanpur
Navaneeth M.Thamban	2021	Evolution of size, composition and mixing state of carbonaceous aerosols in Indo-Gangetic Plain. Current position: Postdoctoral Fellow, University of Manchester, UK
Anil Kumar Mandaria	2021	Impact of ambient relative humidity on the growth and evolution of organic aerosol. Current position: Postdoctoral, CESAM Chamber, CNRS - LISA, Créteil, France
Anubhav Dwivedi (Jointly with Dr. Naveen Tiwari, CHE)	2020	Aerosol nucleation in mixing chamber under various flow conditions Current Position: Postdoctoral Fellow, Aarhus University, Denmark
Manish Joshi	2018	Formation and evolution characteristics of nuclei mode particles in dense atmospheric and confined aerosol environments. Current position: Scientific Officer 'E', BARC, Mumbai Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Shamjad P.M.	2017	Impact of carbonaceous aerosol absorption and mixing state on direct radiative forcing in Kanpur-India. Current position: Postdoctoral Fellow, Aarhus University, Denmark Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Chandan Sarangi	2017	Understanding aerosolsurfacecloudrainfall interactions within Indian summer monsoon region. Current position: Postdoctoral Fellow, Pacific Northwest National Laboratory, Washington, USA Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Abhishek Chakraborty	2016	Fog and organic aerosols interactions: processing, sources, and composition. Current position: Postdoctoral Fellow, Douai School of Engineering, Douai, France Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Deepika Bhattu	2016	Effect of aerosol size, chemical composition, mixing state and volatility on cloud condensation nuclei activity in the ambient atmosphere. Current position: Postdoctoral Fellow, Paul Scherrer Institute, Switzerland Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Chiranjib Chaudhari	2015	Characteristics of historical climate change over Indo- Gangetic basic: Observational analysis and numirical modeling. Current position: Catastrophe Modeler at Risk Management Solution, New Delhi Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Daya Shankar Kaul	2014	Understanding the formation of organic aerosol in urban environment during foggy and nonfoggy episodes. Current position: Postdoctoral Fellow, Hong Kong, China Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
J. Jaidevi	2012	Effects of fine particulate matter on human health and climate. Current position: Assistant Professor, IITRAM, Ahmedabad Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Sumit Kumar Mishra	2011	Numerical estimation of optical properties of pure and polluted mineral dust particle. Current Position: Scientist, Radio and Atmospheric Sciences Division, National Physical Laboratory, New Delhi Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Sagnik Dey	2008	Aerosol radiative effects in Kanpur in the Indo-Gangetic basin, northern India. Current position: Assistant Professor, Dept. of CAS, I.I.T. Delhi Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

M.Tech Thesis students

Saurabh Kukreti	2020	Impact of variability in initial and boundary conditions of meteorology on the simulated particulate matter concentrations over Delhi during winters using WRF-Chem.
Pratapaditya Ghosh	2020	Understanding the non-local and local contributions during a high PM2.5 loading winter episode over the megacity of Delhi using WRF-Chem
Shubham Naresh	2019	Spatial and temporal variability in ionic and metal composition of PM2.5, across five sites of Gangetic plain; seasonality in secondary inorganic aerosol and preliminary source apportionment. Current position: Environmental Engineer, THDC India Limited, Tishikesh, Uttarakhand Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Himadri Sekhar Bhowmik	2019	Inter and Intra seasonality in carbonaceous species (EC, OC) of PM2.5 aerosol over five sites of Indo-Gangetic plain, preliminary source apportionment and case study on multi-day regional SOA formation during winter at Faridabad. Current position: Pursuing PhD under my guidance in Department of Civil Engineering, Indian Institute of Technology-Kanpur
Saad Ahmed	2018	Application of microwave radiometer in nowcasting of convective activity. Current position: Senior Engineer, Tata Consulting Engineers, Noida
Mithun Krishnan	2017	Seasonal dynamics of surface energy balance over a semi-natural grassland in central Indo-Gangetic Basin. Current position: Pursuing PhD under my guidance in Department of Civil Engineering, IIT Kanpur
Geet George	2017	Characterisation of cloud vertical structure (CVS) and cloud radiative forcing (CRF) over Kanpur. Current position: PhD Student, Max Planck Institute for Meteorology, Hamburg, Germany
Bhuvana Joshi	2016	Real time size resolved analysis of organics in Kanpur city: A comparative study between fog and no-fog periods. Current position: Research Scholar, under my guidance in Department of Civil Engineering, IIT Kanpur
Kuntamukkala Pavan Kumar	2016	Black carbon aerosol microphysical properties variation and electron microscopy study of PM205 in Kanpur. Current position:
Bharath Kumar Dual B. Tech - M. Tech	2015	Source apportionment of sub micron aerosol over Kanpur. Current position: Business Analyst, ZS Associates, Gurgaon
Karn Vohra Dual B. Tech - M. Tech	2015	A chamber study to understand aerosol deposition phenomena. Current position: Gurgaon
Tirthankar Chakraborty	2015	Understanding urban micrometeorology and its impact on the heat island of greater Kanpur. Current Position: Ph.D. Student, Yale University, USA
Kundan Kumar	2015	Aerosol direct radiative forcing over Indo-Gangetic basin during pre-mansoon season using WRF-CHEM. Current Position: Assistant Executive Engineer, Office of the Panchayat Raj Superintendent Engineer, Panchayat Raj Circle Adilabad, Tilangana
Vipul Lalchandani	2014	The need for site-, season- and instrument-specific calibrations of a photo-reference method for determining aerosol Black Carbon concentrations and examining color signal of Organic carbon particles. Current Position: Pursuing PhD under my guidance in Department of Civil Engineering, IIT Kanpur
Amit Sharma	2014	Quantifying health benefits of reducing PM2.5 & ozone concentration using WRF-CHEM model. Current position: Ahmedabad
Alabhya Mishra Dual B. Tech - M. Tech	2014	Electrical properties of Titan and Earth atmospheres. Current position: Bangalore
Arun Yadav Dual B. Tech - M. Tech	2013	An evaluation of WRF-Chem model over the Indian Domain Current position: Flipkart, Bangalore
Anubhav Dwivedi	2013	Investigation of activation kinetics of laboratory generated and ambient particles Current position: Postdoctoral Fellow, Aarhus University, Denmark
Rosalin Dalai	2013	Role of aerosol type and mixing state on CCN activity Current position: IIT Bhubneshwar
Akhilesh Rawal Dual B. Tech - M. Tech	2012	Study of ion-aerosol near-cloud mechanism to explain cosmic ray-cloud-climate conundrum Current position: in New Delhi
Shamjad P.M.	2011	Hygroscopicity, mixing state and enhanced absorption of aerosols Current position: Pursuing PhD under my guidance in Department of Civil Engineering, IIT Kanpur
Priya Choudhry	2011	Validation of MODIS-retrieved AOD over Indo-Gangetic Plain Current position: Evalueserve, New Delhi
Monika Srivastava	2011	Aircraft-based CCN Closure Current position: BBD University, Lucknow
Pawan Kumar Bharti	2010	A study of inter and intra variation seasonal of surface Cloud Condensation Nuclei and chemical closure in Kanpur Current position: SIDBI, Ludhiana
Vishnu Patidar	2009	First surface, spatial and vertical measurements of Cloud Condensation Nuclei (CCN)over Indian CTCZ region. Current position: Environmental Engineer
Jariwala Chinmay G.	2009	An observational and laboratory study on the effects of Cloud Condensation Nuclei and black carbon aerosol on fog persistence. Current position: Environmental Engineer, Dar AL-Handasah, Pune
Vivek Pratap Singh	2008	An experimental investigation of the effects of environmental and fog condensationnuclei parameters on rate of fog dissipation. Current position: Engineer, Manali
Sanjay Prakash Baxla	2008	A study of ambient ultra fine aerosols using SMPS.
Anirban Roy	2008	Measurement and simulation of particulate aerosols. Current Position: Ph.D. Student, Carnegi Mellon University, USA
Anilkumar D. Vanga	2007	A numerical study of new particle formation in cirrus cloud. Current Position: Engineer, Jones LangLaSalle, Mumbai
Sudip Chakraborty	2006	Long term changes in surface and columnar water vapor over North India. Current Position: Ph.D. Student, The University of Texas at Austin, USA
Abani Patnaik	2006	Climatology of cloud and aerosol over the Indian subcontinent and adjoining oceans. Current Position: Offshore Structural Engineer, L&T, Mumbai
Roma Srivastava	2006	Study of trace gas concentration over Kanpur region. Current Position: Lecturer, Hindustan College of Engineering, Agra. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Parul Sharma	2006	Study of aerosol chemical composition over Kanpur region. Current Position: Software Engineer, WIPRO, Bangalore, Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tanveer Ahmed	2005	Charging of radioactive aerosols containment wall of pressurized water reactor. Current Position: Post-Doctoral Fellow, Scripps Institute of Oceanography, San Diego, USA
Nagesh Chinnam	2005	Analysis of ambient particles by high volume sampler and PM10
Shyam Kishor	2005	Investigation into seasonal and diurnal formation of atmospheric nitrate.

Project Employees

Kuldeep Dixit	Current Position: Project Scientist, CAS, IIT Delhi Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Jitendra Kumar Meher	Current Position: Kreate Energy (I) Pvt. Ltd., Kreate Global, Vaishali, Ghaziabad, UP Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Dinesh Nath	Current Position: Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Shilpa Shirodkar	Current Position: IIT Kanpur Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Pravin Kumar Verma	Current Position: Mumbai Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Vijay Kanawade	Current Position: UGC-Assistant Professor, Centre for Earth and Space Sciences (UCESS), University of Hyderabad, Prof C R Rao Road, Gachibowli, Hyderabad, Telangana - 500 046 Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
M S Gandhi	Current Position: Pennagaram, Dharmapuri, Tamil Nadu Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Mary Michael	Current Position: Trivandrum Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Beena Umrao	Current Position: New Delhi Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Bhola N. Singh	Current Position: Branch Manager, SBI, Lucknow Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
A.R. Ragi	Current Position: Ph.D. Student, Department of CAS, IIT Delhi Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Arindam Ghosh	Current Position: Postdoctoral Fellow, Japan Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tanmay Dhar	Current Position: Research Scholar, Department of Civil Engineering, IIT Bombay Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Litty Thomas	Current Position: Kerala
Desh Deepak	Current Position: Mumbai
Nikita Tripathi	Current Position: Chandigarh
Bodhaditya Santra	Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Rishi Jain	Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
M. S. Modgil	Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Sanjeev Kumar	Current Position: Self-Employed Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Rina Dutta	Current Position: Doctoral Student, IIT Kharagpur (WB)
Manoj K. Sagar	Current Position: Bangalore
Saurav Dayal	Current Position: Research Engineer Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Nimisha Srivastava	Current Position: Research Engineer Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Narayan	Current Position: Doctoral Student, Mississippi State University, USA Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Praveen Pandey	Current Position: Doctoral Student, Katholik University of Leuven, Belgium Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Atul Srivastava	Current Position: Scientist, Indian Institute of Tropical Meteorology, New Delhi Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Subhash Tiwari	Current Position: Self employe Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

+ - Professional Experience Click to collapse

Nov 2019 onwards	Adjunct Professor, Centre of Excellence for Research on Clean Air (CERCA), Indian Institute of Technology-Delhi, Delhi, India
August 2018 onwards	Higher Administrative Grade Professor (HAG) Professor, Civil Engineering, Indian Institute of Technology-Kanpur, Kanpur, India
June 2018–May 2021	Head, Department of Civil Engineering, Indian Institute of Technology-Kanpur, Kanpur, India
Dec 2015	Visiting Professor, School of Civil Environmental Engineering, Georgia Institute of Technology, USA.

Nov 2014-Oct 2017 Coordinator, Centre for Environmental Science & Engineering, IIT Kanpur
Nov 2014 onwards Adjunct Professor, Department of Earth Sciences, IIT Kanpur
June-July 2014 Visiting Professor, School of Civil Environmental Engineering,Georgia Institute of Technology, USA.
May-July 2012 Professor, Laboratoire de Physique etChimie de Environnement, University of Orleans, France.
April 2012-till date Professor, Department of Civil Engineering and Centre for Environmental Science & Engineering, Indian Institute of Technology-Kanpur, Kanpur, India.
Aug 2009-July 2010 Senior Fellow, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA.
Jan 2008-Mar 2012 Associate Professor, Department of Civil Engineering and Centre for Environmental Science & Engineering, Indian Institute of Technology-Kanpur, Kanpur, India.
May-July 2006 Visiting Associate Professor, Centre for Climate System Research, The University of Tokyo, Japan.
June 2004 Visiting Researcher, NOAA Aeronomy Laboratory, Boulder, USA.
July 2003-Dec 2007 Assistant Professor, Department of Civil Engineering, Indian Institute of Technology-Kanpur, Kanpur.
Jan 2002-July 2003 Post Doctoral Research Assistant, Atmospheric, Oceanic and Planetary Physics, Department of Physics, University of Oxford, UK.
Dec 2000-Dec 2001 Visiting Scientist, Environmental Assessment Division, Bhabha Atomic Research Centre, Mumbai, India.

+ - Awards & Fellowships Click to collapse

Fellow, Institute of Advanced Sustainability Studies, Potsdam, Germany, 2021-2022
J C Bose National Fellow, awarded by SERB, Department of Science & Technology, 2021-26
Arjun Dev Joneja Faculty Chair, IIT-Kanpur, 2021-24
Elected Fellow, Indian National Science Academy (2020)
UP Ratna Award, Government of Uttar Pradesh (2018)
Distinguished Alumnus Award, Banaras Hindu University (2015)
Elected Fellow, The National Academy of Sciences, India (2015)
Rajeeva and Sangeeta Lahri Chair Professor (2015-2018)
Elected Fellow, Indian National Academy of Engineering (2015)
Shanti Swarup Bhatnagar Prize in Earth, Atmosphere, Ocean and Planetary Sciences (2014)
Sir M. Visvesaraya Research Fellowship for excellence in teaching and Research (2009-2012)
NASA Senior Fellowship (2009-2010)
NASI-SCOPUS Young Scientist Award for highest citation in Earth Sciences (2009)
All India Council of Technical Education, Young Teacher Career Award (2003)
Taiwan Aerosol Society award to attend the above conference (2002)
Locky award to attend Sixth international aerosol conference in Taiwan (2002)
Royal Meteorological Society grant to attend Int. aerosol conference in Taiwan (2002)
Aerosol Society Bursary to attend European Aerosol Conference (2000)
Lech award in the final year of Ph.D. (2000)
FELIX award during Ph.D. (Fee waiver and maintenance allowance) (1996-2000)

+ - Contact Information Click to collapse

Office

FB-314,
Departement of Civil Engineering
IIT Kanpur,
Kanpur 208016

Office Phone: 0512-259-7845 (O)

Email: snt[AT]iitk.ac.in

+ - Keywords Click to collapse

Aerosol Direct Effects, Aerosol Indirect Effects, Laboratory Simulation of Fog, Planetary Atmospheres