Research Area
Atmospheric Chemistry
Research Interests
My current research is focused on ensuring more sustainable interactions with our environment through evidence-based understanding of emissions, atmospheric chemistry and air quality feedbacks as well as source apportionment of gases and fine mode aerosol in megacities through field studies. The investigations combine experimental tools such as proton transfer reaction mass spectrometers, gas chromatography and spectroscopic techniques with satellite remote sensed data, chemical box models and chemical transport models for comprehensive understanding. I helped set up the state-of-the-art IISER Mohali Central Atmospheric Chemistry facility in the north-west Indo-Gangetic Plain where atmospheric composition and meteorology measurements for >100 chemical and physical parameters including VOCs at ultra-trace level (ppt-ppb) are being made continuously since 2011. Our laboratory specializes in measuring VOCs using proton transfer reaction mass spectrometry and was the first to apply this technology in India. Ozone chemistry, hydroxyl radical reactivity, molecular chemical fingerprinting of air-pollution sources, volatile organic compounds, mass spectrometric measurements of atmospheric chemical composition and development of India-wide VOC emission inventories using measured emission factors and updated activity data are some of his group’s recent contributions.
Since 2024 : Deputy Editor of Global Sustainability, a Cambridge University Press Journal
Since 2019 : Scientific Steering Committee Member of 65 year old International Commission on Atmospheric Chemistry and Global Pollution, Canada
Since 2022 : Member from India in Environmental Pollution and Atmospheric Chemistry Scientific Steering Committee (EPAC SSC) (Innovation and Research) of United Nation's World Meteorological Organization (WMO), Geneva, Switzerland
Since 2022 : Scientific Steering Committee Member of 32 year old International Global Atmospheric Chemistry (IGAC) Project under Future Earth, USA
2015 - 2020 : First Indian Co-chair (2017-2020) and member of the International Scientific Steering Committee of iLEAPS (Integrated Land Ecosystem-Atmosphere Processes Study), an ICSU, WCRP and Future Earth Global Research Project, IPO Office, Oxford, UK
2010 - 2020 : Editor (Subject: Atmospheric Chemistry and Physics) for Earth System Science Data, an international peer reviewed open access journal (Journal I.F: 11.3 in 2022) published by European Geophysical Union Copernicus Publications, Gottingen, Europe. https://www.earth-system-science-data.net/
June 2012 : Visiting Professor at Ecole Mines Douai, France
June 2013 : Visiting Professor at Max Planck Institute for Chemistry, Mainz, Germany
2011 - 2016 : Head of first Max Planck India Partner Group at IISER Mohali
2007 - 2010 : Post-Doctoral Research Scientist Max Planck Institute for Chemistry, Mainz, Germany
2004 - 2007 : PhD in Natural Sciences, Max Planck Institute for Chemistry, Mainz, Germany and University of Mainz, Germany
2022 - 2004 : M.Tech in Analytical Chemistry, IIT Delhi
1997 - 2022 : Integrated BS-MS in Chemistry, Sri Sathya Sai Institute of Higher Learning, Prashantinailayam, Andhra Pradesh, India
NASI-SCOPUS Young Scientist Award 2016: in the subject area of Earth, Atmospheric and Oceanic Sciences for contributions as described in the award citation:
“An Associate professor at the Indian Institute of Science Education and Research, Mohali , Dr.Vinayak Sinha, is recognized internationally for his contributions and expertise as an analytical and atmospheric chemist who has pioneered field measurements of hydroxyl radical reactivity and volatile organic compounds using proton transfer reaction mass spectrometry. His world famous scientific contribution is the Comparative Reactivity Method (CRM-OH reactivity instrument) developed in 2008 and improved further in 2014. The instrument developed by Dr. Sinha has been emulated by several labs in USA, France, Germany and China advancing global scientific understanding of atmospheric oxidation processes and the cleansing capacity of the atmosphere in varied ecosystems around the world. His current research objective is to understand mechanistic level radical and ozone photochemistry so as to quantify the atmospheric cleansing capacity over the Indian region and ascertain the role of biogenic emissions on regional climate. Dr. Sinha obtained his PhD at the Max Planck Institute for Chemistry and University of Mainz, Germany in 2007. Prior to his doctoral studies, he completed his BSc and MSc in Chemistry from Sri Sathya Sai Institute of Higher Learning and M.Tech in Analytical Chemistry from IIT Delhi.”
Best Teacher Award 2017 given by Indian Institute of Science Education and Research Mohali for best teaching contributions by a faculty under 40 years of age across all departments in the institute. The award citation reads as follows:
“The Best Teacher Award of IISER Mohali for the year 2017 is being awarded to Dr. Vinayak Sinha on Teacher’s Day, 2017 for his contributions to teaching.
Born on 10th June 1977, Dr Sinha is an Earth and Environmental Scientist working in the area of Atmospheric Chemistry and Physics. He obtained his PhD from the Max Planck Institute of Chemistry in Mainz in the year 2007 and was a Postdoctoral Fellow at the same place between 2007 and 2010.
Dr. Sinha joined IISER Mohali as an Assistant Professor on 19th August 2010. He is currently an Associate Professor and Head of the Department of Earth and Environmental Sciences. Dr. Sinha has taught many interdisciplinary courses on Atmospheric Chemistry, Environmental Sciences and Analytical Chemistry, including core, elective and mandatory courses. He has taught theory and laboratory courses. He is a member of the outreach committee of the Institute.
Dr. Sinha is an inspiring teacher. He is genuinely concerned about the well being of his students. He invests a lot of time in mentoring them. He motivates his students to do quality work. He has excellent communication skills. He can explain complex ideas in an easy to grasp manner. His teaching can launch a life-long interest in science among his students.
Member of the Scientific Advisory Committee of the Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital, India from 2012-2017
PETROTECH-CII fellowship awarded by the then Honourable Prime Minister of India Shri A.B. Vajpayee for M.Tech studies at IIT Delhi in 2003.
Dr. Adivi Reddy Gold Medal for distinction as University topper in the BSc (Chem Hons) program in 2000.
Best Presentation Award at the Annual International Max Planck Research School (IMPRS) Meet in 2006
Reviewer for numerous international peer reviewed journals including: Geophysical Research Letters, Scientific Reports, Environmental Science and Technology, Journal of Geophysical Research, Atmospheric Chemistry and Physics, Atmospheric Environment, Atmospheric Measurement Techniques, Current Science, Environmental Chemistry, Advances in Meteorology
Reviewer for several national and international funding agencies including: European Research Council, Brussels, US-Israel Binational Science Foundation, Ministry of Earth Sciences (MOES), India and Ministry of Environment and Forests, India and DBT, India.
G Hayman, B Poulter, S D Ghude, E Blyth, V Sinha, S Archibald, K Ashworth, V Barlow, S Fares, G Feig, T Hiyama, J Jin, S Juhola, M Lee, S Leuzinger, M D Mahecha, X Meng, D Odee, G Purser, H Sato, P Saxena, V S Semeena, A Steiner, X Wang and S Wolff. Research into land atmosphere interactions supports the sustainable development agenda. Global Sustainability 7, 2024. URL, DOI M Shabin, P Khatarkar, H Hakkim, A Awasthi, S Mishra and V Sinha. Monsoon and post-monsoon measurements of 53 non-methane hydrocarbons (NMHCs) in megacity Delhi and Mohali reveal similar NMHC composition across seasons. Urban Climate 55, 2024. URL, DOI V Thilakan, D Pillai, J Sukumaran, C Gerbig, H Hakkim, V Sinha, Y Terao, M Naja and M V Deshpande. Potential of using CO2 observations over India in a regional carbon budget estimation by improving the modelling system. Atmospheric Chemistry and Physics 24(9):5315-5335, 2024. URL, DOI C Bharali, M Barth, R Kumar, S D Ghude, V Sinha and B Sinha. Role of atmospheric aerosols in severe winter fog over the Indo-Gangetic Plain of India: a case study. Atmospheric Chemistry and Physics 24(11):6635-6662, 2024. URL, DOI C Mogno, T J Wallington, P I Palmer, H Hakkim, B Sinha, V Sinha, A L Steiner and S Sharma. Impact of electric and clean-fuel vehicles on future PM2.5 and ozone pollution over Delhi. Environmental Research Communications 6(7), 2024. URL, DOI A Sarkar, V Shankar, V Singh, I Stewart, S Shekhar and V Sinha. Defining the ‘urban critical zone’ for global sustainable development. Current Science 125(8):824-830, 2023. URL, DOI P V Pawar, S D Ghude, G Govardhan, P Acharja, R Kulkarni, R Kumar, B Sinha, V Sinha, C Jena, P Gunwani, T K Adhya, E Nemitz and M A Sutton. Chloride (HCl / Cl-) dominates inorganic aerosol formation from ammonia in the Indo-Gangetic Plain during winter: modeling and comparison with observations. Atmospheric Chemistry and Physics 23(1):41-59, 2023. URL, DOI V Mahandran, H Hakkim, V Sinha and M Jain. Fruit scent as an indicator of ripeness status in ‘bat fruits’ to attract ‘fruit bats’: chemical basis of chiropterochory. Acta Ethologica 26(1):1-11, 2023. URL, DOI M F Khokhar, M S Anjum, A Salam, V Sinha, M Naja, K Ram, H Tanimoto, J H Crawford and M I Mead. Recurring South Asian smog episodes: Call for regional cooperation and improved monitoring. Atmospheric Environment 295, 2023. URL, DOI S D Ghude, R K Jenamani, R Kulkarni, S Wagh, N G Dhangar, A N Parde, P Acharja, P Lonkar, G Govardhan, P Yadav, A Vispute, S Debnath, D M Lal, D S Bisht, C Jena, P V Pawar, S S Dhankhar, V Sinha, D M Chate, P D Safai, N Nigam, M Konwar, A Hazra, T Dharmaraj, V Gopalkrishnan, B Padmakumari, I Gultepe, M Biswas, A K Karipot, T Prabhakaran, R S Nanjundiah and M Rajeevan. WiFEX Walk into the Warm Fog over Indo-Gangetic Plain Region. Bulletin of the American Meteorological Society 104(5):E980-E1005, 2023. URL, DOI D Pandey, K Sharps, D Simpson, B Ramaswami, R Cremades, N Booth, C Jamir, P Büker, V Sinha, B Sinha and L D Emberson. Assessing the costs of ozone pollution in India for wheat producers, consumers, and government food welfare policies. Proceedings of the National Academy of Sciences of the United States of America 120(32), 2023. URL, DOI X Lyu, K Li, H Guo, L Morawska, B Zhou, Y Zeren, F Jiang, C Chen, A H Goldstein, X Xu, T Wang, X Lu, T Zhu, X Querol, S Chatani, M T Latif, D Schuch, V Sinha, P Kumar, B Mullins, R Seguel, M Shao, L Xue, N Wang, J Chen, J Gao, F Chai, I Simpson, B Sinha and D R Blake. A synergistic ozone-climate control to address emerging ozone pollution challenges. One Earth 6(8):964-977, 2023. URL, DOI M Shabin, A Kumar, H Hakkim, Y Rudich and V Sinha. Sources, sinks, and chemistry of Stabilized Criegee Intermediates in the Indo-Gangetic Plain. Science of the Total Environment 896, 2023. URL, DOI C Paton-Walsh, R Subramanian, J H Crawford, L Dawidowski, H Langley DeWitt, L Emberson, L Emmons, R M Garland, Y Kanaya, A Mbandi, K A Pratt, N Y Rojas, A Salam, K Šindelářová, V Sinha, N E Touré, L E Yu and M Zheng. The International Global Atmospheric Chemistry project comments on the revised WHO air quality guidelines. Environmental Research Letters 18(11), 2023. URL, DOI P Acharja, S D Ghude, B Sinha, M Barth, G Govardhan, R Kulkarni, V Sinha, R Kumar, K Ali, I Gultepe, J -E Petit and M N Rajeevan. Thermodynamical framework for effective mitigation of high aerosol loading in the Indo-Gangetic Plain during winter. Scientific Reports 13(1), 2023. URL, DOI R Singh, B Sinha, H Hakkim and V Sinha. Source apportionment of volatile organic compounds during paddy-residue burning season in north-west India reveals large pool of photochemically formed air toxics. Environmental Pollution 338, 2023. URL, DOI H Hakkim, A Kumar, B Sinha and V Sinha. Air pollution scenario analyses of fleet replacement strategies to accomplish reductions in criteria air pollutants and 74 VOCs over India. Atmospheric Environment: X 13, 2022. URL, DOI P Acharja, K Ali, S D Ghude, V Sinha, B Sinha, R Kulkarni, I Gultepe and M N Rajeevan. Enhanced secondary aerosol formation driven by excess ammonia during fog episodes in Delhi, India. Chemosphere 289, 2022. URL, DOI D Meidan, S S Brown, V Sinha and Y Rudich. Nocturnal Atmospheric Oxidative Processes in the Indo-Gangetic Plain and Their Variation During the COVID-19 Lockdowns. Geophysical Research Letters 49(7), 2022. URL, DOI P Chaudhary, R Singh, M Shabin, A Sharma, S Bhatt, V Sinha and B Sinha. Replacing the greater evil: Can legalizing decentralized waste burning in improved devices reduce waste burning emissions for improved air quality?. Environmental Pollution 311, 2022. URL, DOI D P Patnana, B P Chandra, P Chaudhary, B Sinha and V Sinha. Optimized LC-MS/MS method for simultaneous determination of endocrine disruptors and PAHs bound to PM2.5: Sources and health risk in Indo-Gangetic Plain. Atmospheric Environment 290, 2022. URL, DOI A K Mishra, B Sinha, R Kumar, M Barth, H Hakkim, V Kumar, A Kumar, S Datta, A Guenther and V Sinha. Cropland trees need to be included for accurate model simulations of land-atmosphere heat fluxes, temperature, boundary layer height, and ozone. Science of the Total Environment 751, 2021. URL, DOI W Wang, J Qi, J Zhou, B Yuan, Y Peng, S Wang, S Yang, J Williams, V Sinha and M Shao. The improved comparative reactivity method (ICRM): Measurements of OH reactivity under high-NO<i>x</i> conditions in ambient air. Atmospheric Measurement Techniques 14(3):2285-2298, 2021. URL, DOI V Sinha. Paul Josef Crutzen (1933–2021). Current Science 120(6):1102-1106, 2021. URL K Ravindra, T Singh, V Sinha, B Sinha, S Paul, S D Attri and S Mor. Appraisal of regional haze event and its relationship with PM2.5 concentration, crop residue burning and meteorology in Chandigarh, India. Chemosphere 273, 2021. URL, DOI G Puri, S Meena, V Sinha, A Hazarika, H Hakkim, A Sharma, K Kajal and N Dogra. Quantitative assessment of nitrous oxide levels in room air of operation theaters and recovery area: An observational study. Indian Journal of Occupational and Environmental Medicine 25(3):147-151, 2021. URL, DOI I De Smedt, G Pinardi, C Vigouroux, S Compernolle, A Bais, N Benavent, F Boersma, K -L Chan, S Donner, K -U Eichmann, P Hedelt, F Hendrick, H Irie, V Kumar, J -C Lambert, B Langerock, C Lerot, C Liu, D Loyola, A Piters, A Richter, C Rivera Cárdenas, F Romahn, R G Ryan, V Sinha, N Theys, J Vlietinck, T Wagner, T Wang, H Yu and M Van Roozendael. Comparative assessment of TROPOMI and OMI formaldehyde observations and validation against MAX-DOAS network column measurements. Atmospheric Chemistry and Physics 21(16):12561-12593, 2021. URL, DOI H Hakkim, A Kumar, S Annadate, B Sinha and V Sinha. RTEII: A new high-resolution (0.1° × 0.1°) road transport emission inventory for India of 74 speciated NMVOCs, CO, NOx, NH3, CH4, CO2, PM2.5 reveals massive overestimation of NOx and CO and missing nitromethane emissions by existing inventories. Atmospheric Environment: X 11, 2021. URL, DOI M F Khokhar, M S Anjum, A Salam, V Sinha, M Naja, H Tanimoto, J H Crawford and M I Mead. Countries of the Indo-Gangetic Plain must unite against air pollution. Nature 598(7881):415, 2021. URL, DOI C Lerot, F Hendrick, M Van Roozendael, L M A Alvarado, A Richter, I De Smedt, N Theys, J Vlietinck, H Yu, J Van Gent, T Stavrakou, J -F Müller, P Valks, D Loyola, H Irie, V Kumar, T Wagner, S F Schreier, V Sinha, T Wang, P Wang and C Retscher. Glyoxal tropospheric column retrievals from TROPOMI -multi-satellite intercomparison and ground-based validation. Atmospheric Measurement Techniques 14(12):7775-7807, 2021. URL, DOI A Kumar, H Hakkim, S D Ghude and V Sinha. Probing wintertime air pollution sources in the Indo-Gangetic Plain through 52 hydrocarbons measured rarely at Delhi & Mohali. Science of the Total Environment 801, 2021. URL, DOI L Vettikkat, V Sinha, S Datta, A Kumar, H Hakkim, P Yadav and B Sinha. Significant emissions of dimethyl sulfide and monoterpenes by big-leaf mahogany trees: Discovery of a missing dimethyl sulfide source to the atmospheric environment. Atmospheric Chemistry and Physics 20(1):375-389, 2020. URL, DOI S H Kulkarni, S D Ghude, C Jena, R K Karumuri, B Sinha, V Sinha, R Kumar, V K Soni and M Khare. How Much Does Large-Scale Crop Residue Burning Affect the Air Quality in Delhi?. Environmental science & technology 54(8):4790-4799, 2020. URL, DOI K Kreher, M Van Roozendael, F Hendrick, A Apituley, E Dimitropoulou, U Frieß, A Richter, T Wagner, J Lampel, N Abuhassan, L Ang, M Anguas, A Bais, N Benavent, T Bösch, K Bognar, A Borovski, I Bruchkouski, A Cede, K Lok Chan, S Donner, T Drosoglou, C Fayt, H Finkenzeller, D Garcia-Nieto, C Gielen, L Gómez-Martín, N Hao, B Henzing, J Herman, C Hermans, S Hoque, H Irie, J Jin, P Johnston, J Khayyam Butt, F Khokhar, T Koenig, J Kuhn, V Kumar, C Liu, J Ma, A Merlaud, A Mishra, M Müller, M Navarro-Comas, M Ostendorf, A Pazmino, E Peters, G Pinardi, M Pinharanda, A Piters, U Platt, O Postylyakov, C Prados-Roman, O Puentedura, R Querel, A Saiz-Lopez, A Schönhardt, S Schreier, V Sinha, E Spinei, K Strong, F Tack, X Tian, M Tiefengraber, J Van Gent, R Volkamer, M Vrekoussis, S Wang, Z Wang, M Wenig, F Wittrock, P Xie, J Xu, M Yela, C Zhang and X Zhao. Intercomparison of NO2, O4, O3 and HCHO slant column measurements by MAX-DOAS and zenith-sky UV-visible spectrometers during CINDI-2. Atmospheric Measurement Techniques 13(5):2169-2208, 2020. URL, DOI A Kumar, V Sinha, M Shabin, H Hakkim, B Bonsang and V Gros. Non-methane hydrocarbon (NMHC) fingerprints of major urban and agricultural emission sources for use in source apportionment studies. Atmospheric Chemistry and Physics 20(20):12133-12152, 2020. URL, DOI V Kumar, S Beirle, S Dörner, A K Mishra, S Donner, Y Wang, V Sinha and T Wagner. Long-term MAX-DOAS measurements of NO2, HCHO, and aerosols and evaluation of corresponding satellite data products over Mohali in the Indo-Gangetic Plain. Atmospheric Chemistry and Physics 20(22):14183-14235, 2020. URL, DOI A K Mishra and V Sinha. Emission drivers and variability of ambient isoprene, formaldehyde and acetaldehyde in north-west India during monsoon season. Environmental Pollution 267, 2020. URL, DOI K Debnath, S Roy, T Bose, S Adhikari, V Sinha and V Rabha. A Study of Chemical Treatment of Natural Fibers and Its Effect on the Mechanical Properties of Developed Composites. Materials Horizons: From Nature to Nanomaterials, pages 65-80, 2019. URL, DOI G Sharma, B Sinha, Pallavi, H Hakkim, B P Chandra, A Kumar and V Sinha. Gridded Emissions of CO, NOx, SO2, CO2, NH3, HCl, CH4, PM2.5, PM10, BC, and NMVOC from Open Municipal Waste Burning in India. Environmental Science and Technology 53(9):4765-4774, 2019. URL, DOI H Hakkim, V Sinha, B P Chandra, A Kumar, A K Mishra, B Sinha, G Sharma, H Pawar, B Sohpaul, S D Ghude, P Pithani, R Kulkarni, R K Jenamani and M Rajeevan. Volatile organic compound measurements point to fog-induced biomass burning feedback to air quality in the megacity of Delhi. Science of the Total Environment 689:295-304, 2019. URL, DOI L M David, A R Ravishankara, J F Brewer, B Sauvage, V Thouret, S Venkataramani and V Sinha. Tropospheric ozone over the Indian subcontinent from 2000 to 2015: Data set and simulation using GEOS-Chem chemical transport model. Atmospheric Environment 219, 2019. URL, DOI Pallavi, B Sinha and V Sinha. Source apportionment of volatile organic compounds in the northwest Indo-Gangetic Plain using a positive matrix factorization model. Atmospheric Chemistry and Physics 19(24):15467-15482, 2019. URL, DOI B P Chandra, V Sinha, H Hakkim, A Kumar, H Pawar, A K Mishra, G Sharma, Pallavi, S Garg, S D Ghude, D M Chate, P Pithani, R Kulkarni, R K Jenamani and M Rajeevan. Odd-even traffic rule implementation during winter 2016 in Delhi did not reduce traffic emissions of VOCs, carbon dioxide, methane and carbon monoxide. Current Science 114(6):1318-1325, 2018. URL, DOI G Mills, H Pleijel, C S Malley, B Sinha, O R Cooper, M G Schultz, H S Neufeld, D Simpson, K Sharps, Z Feng, G Gerosa, H Harmens, K Kobayashi, P Saxena, E Paoletti, V Sinha and X Xu. Tropospheric ozone assessment report: Present-day tropospheric ozone distribution and trends relevant to vegetation. Elementa 6, 2018. URL, DOI V Kumar, B P Chandra and V Sinha. Large unexplained suite of chemically reactive compounds present in ambient air due to biomass fires. Scientific Reports 8(1), 2018. URL, DOI S D Ghude, G S Bhat, T Prabhakaran, R K Jenamani, D M Chate, P D Safai, A K Karipot, M Konwar, P Pithani, V Sinha, P S P Rao, S A Dixit, S Tiwari, K Todekar, S Varpe, A K Srivastava, D S Bisht, P Murugavel, K Ali, U Mina, M Dharua, Y Jaya Rao, B Padmakumari, A Hazra, N Nigam, U Shende, D M Lal, B P Chandra, A K Mishra, A Kumar, H Hakkim, H Pawar, P Acharja, R Kulkarni, C Subharthi, B Balaji, M Varghese, S Bera and M Rajeevan. Winter fog experiment over the Indo-Gangetic plains of India. Current Science 112(4):767-784, 2017. URL, DOI M G Schultz, S Schröder, O Lyapina, O R Cooper, I Galbally, I Petropavlovskikh, E Von Schneidemesser, H Tanimoto, Y Elshorbany, M Naja, R J Seguel, U Dauert, P Eckhardt, S Feigenspan, M Fiebig, A -G Hjellbrekke, Y -D Hong, P C Kjeld, H Koide, G Lear, D Tarasick, M Ueno, M Wallasch, D Baumgardner, M -T Chuang, R Gillett, M Lee, S Molloy, R Moolla, T Wang, K Sharps, J A Adame, G Ancellet, F Apadula, P Artaxo, M E Barlasina, M Bogucka, P Bonasoni, L Chang, A Colomb, E Cuevas-Agulló, M Cupeiro, A Degorska, A Ding, M Fröhlich, M Frolova, H Gadhavi, F Gheusi, S Gilge, M Y Gonzalez, V Gros, S H Hamad, D Helmig, D Henriques, O Hermansen, R Holla, J Hueber, U Im, D A Jaffe, N Komala, D Kubistin, K -S Lam, T Laurila, H Lee, I Levy, C Mazzoleni, L R Mazzoleni, A McClure-Begley, M Mohamad, M Murovec, M Navarro-Comas, F Nicodim, D Parrish, K A Read, N Reid, L Ries, P Saxena, J J Schwab, Y Scorgie, I Senik, P Simmonds, V Sinha, A I Skorokhod, G Spain, W Spangl, R Spoor, S R Springston, K Steer, M Steinbacher, E Suharguniyawan, P Torre, T Trickl, L Weili, R Weller, X Xiaobin, L Xue and M Zhiqiang. Tropospheric Ozone Assessment Report: Database and metrics data of global surface ozone observations. Elementa 5, 2017. URL, DOI A Novelli, K Hens, C T Ernest, M Martinez, A C Nölscher, V Sinha, P Paasonen, T Petäjä, M Sipilä, T Elste, C Plass-Dülmer, G J Phillips, D Kubistin, J Williams, L Vereecken, J Lelieveld and H Harder. Estimating the atmospheric concentration of Criegee intermediates and their possible interference in a FAGE-LIF instrument. Atmospheric Chemistry and Physics 17(12):7807-7826, 2017. URL, DOI C Sarkar, V Sinha, B Sinha, A K Panday, M Rupakheti and M G Lawrence. Source apportionment of NMVOCs in the Kathmandu Valley during the SusKat-ABC international field campaign using positive matrix factorization. Atmospheric Chemistry and Physics 17(13):8129-8156, 2017. URL, DOI B P Chandra, V Sinha, H Hakkim and B Sinha. Storage stability studies and field application of low cost glass flasks for analyses of thirteen ambient VOCs using proton transfer reaction mass spectrometry. International Journal of Mass Spectrometry 419:11-19, 2017. URL, DOI V Kumar, C Sarkar and V Sinha. Influence of post-harvest crop residue fires on surface ozone mixing ratios in the N.W. IGP analyzed using 2years of continuous in situ trace gas measurements. Journal of Geophysical Research 121(7):3619-3633, 2016. URL, DOI S Garg, B P Chandra, V Sinha, R Sarda-Esteve, V Gros and B Sinha. Limitation of the Use of the Absorption Angstrom Exponent for Source Apportionment of Equivalent Black Carbon: A Case Study from the North West Indo-Gangetic Plain. Environmental Science and Technology 50(2):814-824, 2016. URL, DOI B P Chandra and V Sinha. Contribution of post-harvest agricultural paddy residue fires in the N.W. Indo-Gangetic Plain to ambient carcinogenic benzenoids, toxic isocyanic acid and carbon monoxide. Environment International 88:187-197, 2016. URL, DOI C Sarkar, V Sinha, V Kumar, M Rupakheti, A Panday, K S Mahata, D Rupakheti, B Kathayat and M G Lawrence. Overview of VOC emissions and chemistry from PTR-TOF-MS measurements during the SusKat-ABC campaign: High acetaldehyde, isoprene and isocyanic acid in wintertime air of the Kathmandu Valley. Atmospheric Chemistry and Physics 16(6):3979-4003, 2016. URL, DOI P K Misztal, C N Hewitt, J Wildt, J D Blande, A S D Eller, S Fares, D R Gentner, J B Gilman, M Graus, J Greenberg, A B Guenther, A Hansel, P Harley, M Huang, K Jardine, T Karl, L Kaser, F N Keutsch, A Kiendler-Scharr, E Kleist, B M Lerner, T Li, J Mak, A C Nölscher, R Schnitzhofer, V Sinha, B Thornton, C Warneke, F Wegener, C Werner, J Williams, D R Worton, N Yassaa and A H Goldstein. Atmospheric benzenoid emissions from plants rival those from fossil fuels. Scientific Reports 5, 2015. URL, DOI B Sinha, K Singh Sangwan, Y Maurya, V Kumar, C Sarkar, B P Chandra and V Sinha. Assessment of crop yield losses in Punjab and Haryana using 2 years of continuous in situ ozone measurements. Atmospheric Chemistry and Physics 15(16):9555-9576, 2015. URL, DOI C Sarkar, V Sinha, V Kumar, M Rupakheti, A Panday, K S Mahata, D Rupakheti, B Kathayat and M G Lawrence. Overview of VOC emissions and chemistry from PTR-TOF-MS measurements during the SusKat-ABC campaign: high acetaldehyde, isoprene and isocyanic acid in wintertime air of the Kathmandu Valley. Atmospheric Chemistry and Physics Discussions 15(17):25021-25087, 2015. URL, DOI N Zannoni, S Dusanter, V Gros, R Sarda Esteve, V Michoud, V Sinha, N Locoge and B Bonsang. Intercomparison of two comparative reactivity method instruments inf the Mediterranean basin during summer 2013. Atmospheric Measurement Techniques 8(9):3851-3865, 2015. URL, DOI R F Hansen, M Blocquet, C Schoemaecker, T Léonardis, N Locoge, C Fittschen, B Hanoune, P S Stevens, V Sinha and S Dusanter. Intercomparison of the comparative reactivity method (CRM) and pump-probe technique for measuring total OH reactivity in an urban environment. Atmospheric Measurement Techniques 8(10):4243-4264, 2015. URL, DOI J A Adame, M Martínez, M Sorribas, P J Hidalgo, H Harder, J -M Diesch, F Drewnick, W Song, J Williams, V Sinha, M A Hernández-Ceballos, J Vilà-Guerau De Arellano, R Sander, Z Hosaynali-Beygi, H Fischer, J Lelieveld and B De La Morena. Meteorology during the DOMINO campaign and its connection with trace gases and aerosols. Atmospheric Chemistry and Physics 14(5):2325-2342, 2014. URL, DOI V Sinha, V Kumar and C Sarkar. Chemical composition of pre-monsoon air in the Indo-Gangetic Plain measured using a new air quality facility and PTR-MS: High surface ozone and strong influence of biomass burning. Atmospheric Chemistry and Physics 14(12):5921-5941, 2014. URL, DOI K Hens, A Novelli, M Martinez, J Auld, R Axinte, B Bohn, H Fischer, P Keronen, D Kubistin, A C Nölscher, R Oswald, P Paasonen, T Petäjä, E Regelin, R Sander, V Sinha, M Sipilä, D Taraborrelli, C Tatum Ernest, J Williams, J Lelieveld and H Harder. Observation and modelling of HOx radicals in a boreal forest. Atmospheric Chemistry and Physics 14(16):8723-8747, 2014. URL, DOI V Kumar and V Sinha. VOC-OHM: A new technique for rapid measurements of ambient total OH reactivity and volatile organic compounds using a single proton transfer reaction mass spectrometer. International Journal of Mass Spectrometry 374:55-63, 2014. URL, DOI C Sarkar, V Kumar and V Sinha. Massive emissions of carcinogenic benzenoids from paddy residue burning in North India. Current Science 104(12):1703-1709, 2013. URL M D Andrés-Hernández, D Kartal, J N Crowley, V Sinha, E Regelin, M Martínez-Harder, V Nenakhov, J Williams, H Harder, H Bozem, W Song, J Thieser, M J Tang, Z Hosaynali Beigi and J P Burrows. Diel peroxy radicals in a semi-industrial coastal area: Nighttime formation of free radicals. Atmospheric Chemistry and Physics 13(11):5731-5749, 2013. URL, DOI B J H Van Stratum, J Vilá-Guerau De Arellano, H G Ouwersloot, K Van Den Dries, T W Van Laar, M Martinez, J Lelieveld, J -M Diesch, F Drewnick, H Fischer, Z Hosaynali Beygi, H Harder, E Regelin, V Sinha, J A Adame, M Sörgel, R Sander, H Bozem, W Song, J Williams and N Yassaa. Case study of the diurnal variability of chemically active species with respect to boundary layer dynamics during DOMINO. Atmospheric Chemistry and Physics 12(12):5329-5341, 2012. URL, DOI A C Nölscher, J Williams, V Sinha, T Custer, W Song, A M Johnson, R Axinte, H Bozem, H Fischer, N Pouvesle, G Phillips, J N Crowley, P Rantala, J Rinne, M Kulmala, D Gonzales, J Valverde-Canossa, A Vogel, T Hoffmann, H G Ouwersloot, J Vilà-Guerau De Arellano and J Lelieveld. Summertime total OH reactivity measurements from boreal forest during HUMPPA-COPEC 2010. Atmospheric Chemistry and Physics 12(17):8257-8270, 2012. URL, DOI V Sinha, J Williams, J M Diesch, F Drewnick, M Martinez, H Harder, E Regelin, D Kubistin, H Bozem, Z Hosaynali-Beygi, H Fischer, M D Andrés-Hernández, D Kartal, J A Adame and J Lelieveld. Constraints on instantaneous ozone production rates and regimes during DOMINO derived using in-situ OH reactivity measurements. Atmospheric Chemistry and Physics 12(15):7269-7283, 2012. URL, DOI C Dolgorouky, V Gros, R Sarda-Esteve, V Sinha, J Williams, N Marchand, S Sauvage, L Poulain, J Sciare and B Bonsang. Total OH reactivity measurements in Paris during the 2010 MEGAPOLI winter campaign. Atmospheric Chemistry and Physics 12(20):9593-9612, 2012. URL, DOI A C Nölscher, V Sinha, S Bockisch, T Klüpfel and J Williams. Total OH reactivity measurements using a new fast gas chromatographic photo-ionization detector (GC-PID). Atmospheric Measurement Techniques 5(12):2981-2992, 2012. URL, DOI D Mogensen, S Smolander, A Sogachev, L Zhou, V Sinha, A Guenther, J Williams, T Nieminen, M K Kajos, J Rinne, M Kulmala and M Boy. Modelling atmospheric OH-reactivity in a boreal forest ecosystem. Atmospheric Chemistry and Physics 11(18):9709-9719, 2011. URL, DOI J Williams, J Crowley, H Fischer, H Harder, M Martinez, T Petäjä, J Rinne, J Bäck, M Boy, M Dal Maso, J Hakala, M Kajos, P Keronen, P Rantala, J Aalto, H Aaltonen, J Paatero, T Vesala, H Hakola, J Levula, T Pohja, F Herrmann, J Auld, E Mesarchaki, W Song, N Yassaa, A Nölscher, A M Johnson, T Custer, V Sinha, J Thieser, N Pouvesle, D Taraborrelli, M J Tang, H Bozem, Z Hosaynali-Beygi, R Axinte, R Oswald, A Novelli, D Kubistin, K Hens, U Javed, K Trawny, C Breitenberger, P J Hidalgo, C J Ebben, F M Geiger, A L Corrigan, L M Russell, H G Ouwersloot, J Vilá-Guerau De Arellano, L Ganzeveld, A Vogel, M Beck, A Bayerle, C J Kampf, M Bertelmann, F K̈llner, T Hoffmann, J Valverde, D González, M -L Riekkola, M Kulmala and J Lelieveld. The summertime Boreal forest field measurement intensive (HUMPPA-COPEC-2010): An overview of meteorological and chemical influences. Atmospheric Chemistry and Physics 11(20):10599-10618, 2011. URL, DOI D B Millet, A Guenther, D Siegel, N Nelson, H Singh, J De Gouw, C Warneke, J Williams, G Eerdekens, V Sinha, T Karl, F Flocke, E Apel, D D Riemer, P I Palmer and M Barkley. Global atmospheric budget of acetaldehyde: 3-D model analysis and constraints from in-situ and satellite observations. Atmospheric Chemistry and Physics 10(7):3405-3425, 2010. URL, DOI V Sinha, J Williams, J Lelieveld, T M Ruuskanen, M K Kajos, J Patokoski, H Hellen, H Hakola, D Mogensen, M Boy, J Rinne and M Kulmala. OH reactivity measurements within a boreal forest: Evidence for unknown reactive emissions. Environmental Science and Technology 44(17):6614-6620, 2010. URL, DOI G Eerdekens, L Ganzeveld, J V -G De Arellano, T Klüpfel, V Sinha, N Yassaa, J Williams, H Harder, D Kubistin, M Martinez and J Lelieveld. Flux estimates of isoprene, methanol and acetone from airborne PTR-MS measurements over the tropical rainforest during the GABRIEL 2005 campaign. Atmospheric Chemistry and Physics 9(13):4207-4227, 2009. URL, DOI G Eerdekens, N Yassaa, V Sinha, P P Aalto, H Aufmhoff, F Arnold, V Fiedler, M Kulmala and J Williams. VOC measurements within a boreal forest during spring 2005: On the occurrence of elevated monoterpene concentrations during night time intense particle concentration events. Atmospheric Chemistry and Physics 9(21):8331-8350, 2009. URL, DOI V Sinha, T G Custer, T Kluepfel and J Williams. The effect of relative humidity on the detection of pyrrole by PTR-MS for OH reactivity measurements. International Journal of Mass Spectrometry 282(3):108-111, 2009. URL, DOI L Ganzeveld, G Eerdekens, G Feig, H Fischer, H Harder, R Königstedt, D Kubistin, M Martinez, F X Meixner, H A Scheeren, V Sinha, D Taraborrelli, J Williams, J Vilà-Guerau De Arellano and J Lelieveld. Surface and boundary layer exchanges of volatile organic compounds, nitrogen oxides and ozone during the GABRIEL campaign. Atmospheric Chemistry and Physics 8(20):6223-6243, 2008. URL, DOI V Sinha, J Williams, J N Crowley and J Lelieveld. The comparative reactivity method - A new tool to measure total OH Reactivity in ambient air. Atmospheric Chemistry and Physics 8(8):2213-2227, 2008. URL, DOI V Sinha, J Williams, M Meyerhöfer, U Riebesell, A I Paulino and A Larsen. Air-sea fluxes of methanol, acetone, acetaldehyde, isoprene and DMS from a Norwegian fjord following a phytoplankton bloom in a mesocosm experiment. Atmospheric Chemistry and Physics 7(3):739-755, 2007. URL, DOI V Sinha, S Byravan and R A Mashelkar. Issues in Indian science [3] (multiple letters). Science 309(5734):557-558, 2005. URL, DOI