(Theme of the year 2021: Montreal Protocol- keeping us, our food, our vaccines cool)

Webinar Report

SPA ENVIS RP on Human Settlements and Their Impact on Environment 

Hosted by School of Planning and Architecture

Webinar on the occasion of World Ozone Day was conducted on 18th September 2021 from 11:00 am to 12:30 pm by ENVIS Resource Partner on Human Settlements and their impact Environment, School of Planning and Architecture on a virtual platform. World Ozone Day is observed every year on 16th September to commemorate the signing of Montreal Protocol for the preservation of ozone layer and to phase out ozone depleting substances. To address the objectives of the webinar and to spread the awareness in this context, presentations and formal discussion session were executed by Key Speakers and distinguished guests from science and planning background. More than 15 attendees participated in the webinar and they included SPA faculty, students and SPA ENVIS RP staff.

Prof Dr. Meenakshi Dhote (HOD, Environmental Planning and Coordinator, ENVIS RP, SPA) welcomed the gathering and addressed the occasion briefed on the necessity of defending ozone layer. Dr. Anil Kumar (Environment Director, Heart Care Foundation of India) and Dr. Dipankar Saha (Former Head, Air Pollution Divison) were the honourable guests who graced the occasion with their valuable feedbacks. Dr. Shankar Aggarwal (Principal Scientist, National Physical Laboratory) and Dr. Anil Kumar Haritash (Professor, Department of Environmental Engineering, Delhi Technological University) were the eminent speakers who shared their expertise in the field of atmospheric science covering every aspect of Stratospheric and Tropospheric Ozone and related research.

Ms. Harsimran Kaur (Information Officer, SPA ENVIS RP) introduced the speaker and moderated the session.

Dr Shankar Aggarwal presented on the topic ‘Ambient Ozone and other Gas measurements and their Atmospheric Chemistry’ and highlighted on:

        ·         Atmospheric chemistry of ambient ozone formation and associated health effects
·         Important components of the measurement required in ambient air monitoring
·         Methods of measurements of criterion pollutants and predominantly focused on ambient ozone measurement
·         The gravimetric preparation of gas standards and gas metrology facilities at National Physical Laboratory.
·         The study of correlation between ambient Ozone and Nitrogen dioxide concentration observed during the period June 2019- April 2020. Nitrogen dioxide the main component considered in ground level ozone formation was analysed at lower level with subsequent rise in ambient ozone was observed during the monsoon period was one of the imperative outcomes of the ambient air monitoring at NPL.
·          Complex mechanisms behind the source and recipients of air pollutants, emphasizing the indispensable need of more versatile standards and instrumentation.
·         Graphical display of particle transport in respiratory system and defining the deposition of different particles size w.r.t the geometry of respiratory tract.

Dr Anil Kumar Haritash presented on the topic ‘Ozone Hole Formation’ and shared the science behind Stratospheric ozone destruction. He mainly emphasized on:

·         Physical and Chemical characteristics of Stratospheric Ozone.
·         Nature of ozone depleting substances and Ozone depletion cycle in Stratosphere.
·         Discovery of Ozone Hole and scientific activities on Ozone.
·        Role of Stratospheric ozone in the absorption and prevention of harmful high energy radiations to reach the earth.
·         Formation of ozone hole over Antarctica.
·         Effects of ozone hole on the biotic components of biosphere.
·       Control Strategies - International Environmental agreements and conventions for the protection of Ozone Layer.

At the end of the session Dr Dipankar Saha and Dr. Anil Kumar were invited for an open discussion and they provided their concluding contextual remarks. The webinar was concluded with a vote of thanks by Prof. Dr Meenakshi Dhote.

Glimpses of Webinar on WORLD OZONE DAY