||Dr. Raymond A. Duraiswami
||Volcanic stratigraphy of the Deccan Traps: physical volcanological and geochemical approach
||Born on 13th January 1970, Dr. Raymond A. Duraiswami completed his graduation from Nowrosjee Wadia College, Pune in 1992 and post graduation and Ph.D. from the Department of Geology, University of Pune in 1994 and 2008 respectively. He worked as Project Assistant (1994-96), DST-JRF (1996-98) and CSIR SRF (1998-2000) before joining Groundwater Surveys and Development Agency, GoM as Junior Geologist (2000-2009). He presently works as Assistant Professor at the Department of Geology Savitribai Phule Pune University, Pune and has varied interests in igneous petrology, physical volcanology and hydrogeochemistry of groundwaters from the Deccan Traps and associated formations. He has co-edited 5 books and has published 63 papers in national and international journals. His interests include Physical volcanology and hydrogeology of the Deccan Traps, India and study of ophiolites from Himalayas and Andaman and Nicorbar Islands. In India, he has worked in diverse terrains such as the Higher Himalayas of Ladkah and Karakoram, Sikkim, Andaman Islands, Thar dessert and salt flats of Kutch. He has also visited countries like Malawi, Iran, Norway, Sweden and Georgia in connections with geological mapping of volcanic terrains. He is Fellow and Life Member of Professional organizations like Geological Society of India, Bangalore, Indian Science Congress Association, Calcutta, Gondwana Geological Society, Nagpur, Wadia Institute of Himalayan Geology, Dehradun, and Indian Society of Geometrics. At present 8 Ph.D. research scholars working on diverse volcanological topics are registered under his guidance.
||Feb 06, 2019
||Professor Chandra Venkataraman
||Source influence on emission pathways and ambient PM-2.5 pollution in India (2015-2050)
||India currently experiences degraded air quality, with future economic development leading to challenges for air quality management. In this collaborative study, under the Global Burden of Disease-Major Air Pollution Sources (GBD-MAPS) project, we developed detailed emissions of fine particulate matter and its precursors for 2015 and projections to 2050, under specific pathways of diffusion of cleaner and more energy efficient technologies. The impacts of
individual source-sectors on PM-2.5 concentrations were assessed through air-quality simulations using the GEOS-Chem model. A systematic analysis of emissions from all sources and their impact on ambient air pollution exposure, in this study, found significant regional background PM-2.5 levels (largest influence from residential biomass use followed by agricultural residue burning and industrial coal). This underlies PM-2.5 pollution from local sources (like transportation, brick kilns, trash burning). The study finds that PM-2.5 pollution is a national problem, with a regional character, not limited to urban areas or megacities. Under present day emissions, modelled air pollution levels in most states exceeded the national PM-2.5 standard (40 µg/m3). Largest modelled concentrations occur in north India. Future evolution of emissions under regulations set at current levels and promulgated levels, yielded deterioration in
future air-quality in 2030 and 2050. Only under a scenario of ambitious, prospective measures, yet to be formulated, was an overall reduction in PM2.5 concentrations achieved. In this scenario, concentrations in 20 states and six union territories were simulated to fall below the national standard in 2030 and 2050. Effective mitigation of future air pollution in India requires adoption of aggressive prospective regulation, for a three-pronged switch away from (i) biomass-fuelled traditional technologies, (ii) industrial coal-burning and (iii) open burning of agricultural residues. Early action is essential on residential clean energy and the control of agricultural residue burning to improve north India air quality.
||Feb 22, 2018
||Professor Philip K. Hopke
||There is More to Global Warming than CO2: The Role of Short-Term Climate Forcers
||There has been a great deal of emphasis on the role of CO2 in driving climate change and the need for controlling CO2 emissions. However, CO2 represents less than half of the positive radiation forcing that is driving rising temperatures. There is an important role of short-term climate forcers particularly black carbon (BC) particles, methane, and ozone. These species combined represent about as much positive forcing as CO2. Thus, their control would have immediate benefits for climate because of their shorter lifetime in the atmosphere and because
they represent serious air pollutants that induce a variety of adverse effects including human mortality and morbidity. In this talk, the nature of these atmospheric constituents will be discussed and their role relative to other drivers of climate changed will be presented. The problem of CO2 still needs to be addressed, but immediate attention to the short-lived forcers could provide some time to work on developing alternative energy systems that can support the
ever-growing human population.
||Feb 22, 2018
||Prof. Hugh Sinclair
||How Storms and Earthquakes Built the Himalaya
||The growth of the Himalayan mountain chain is a direct response to the collision of India into the Asian plate at a speed of around 20mm/yr. However, the simple act of continental collision causes crust to thicken, and elevations to increase, but in order to generate the world’s highest mountains, erosion must play its role. Whilst this seems counter-intuitive, as erosion should remove mountains, but, in order to generate the high peaks and steep valleys, rivers and glaciers have to incise into the underlying rocks. In this talk, I will discuss how extreme events such as earthquakes and storms are the principle mechanism by which erosion takes place over the Himalaya. I will present examples of extreme erosion events in Ladakh, Uttarakhand and Nepal, and consider their role in defining the mountain chain. Lastly, I will discuss the importance of understanding these processes for considering flood hazards in the Ganga Plains which represents home to nearly 10% of the global population.
||Oct 30, 2017
||Prof Hugh Sinclair
||Mountain belts/Foreland basin systems
||Prof Sinclair will be delivering a lecture between 10 AM and 11 AM in L2. This lecture is mandatory for all ESP students. Faculty members and other students are welcome to attend.
||Nov 29, 2017