Journal des sciences de la Terre et du changement climatique

Abstrait

Composition of the Atmosphere and Unravelling the Complexities of Earth's Breath

Dr. Prasenjit Agarwal

Atmospheric chemistry is a branch of science that investigates the chemical composition, reactions, and processes occurring in the Earth's atmosphere. It explores the interactions between various natural and anthropogenic sources of gases, particles, and other constituents, and their impact on air quality, climate, and the environment. The atmosphere is a complex system consisting of different layers with varying chemical compositions. Understanding the chemistry of the atmosphere is crucial for comprehending the factors that influence climate change, air pollution, and the ozone layer. It involves the study of trace gases, such as carbon dioxide, methane, and ozone, as well as aerosols, which are tiny particles suspended in the air. One key area of research in atmospheric chemistry is the identification and quantification of sources and sinks of different atmospheric species. Sources include natural processes like volcanic emissions, forest fires, and biogenic emissions from plants, as well as human activities such as the burning of fossil fuels, industrial processes, and agricultural practices. Sinks are mechanisms that remove these species from the atmosphere, including chemical reactions, deposition onto land and oceans, and uptake by vegetation. Researchers in atmospheric chemistry employ a combination of laboratory experiments, field measurements, and computer models to advance our understanding of the complex chemical reactions occurring in the atmosphere. They collaborate with atmospheric physicists, meteorologists, and environmental scientists to develop comprehensive models that can simulate and predict atmospheric processes. By improving our knowledge of atmospheric chemistry, scientists aim to develop strategies for mitigating air pollution, understanding climate change, and safeguarding the environment. This field of study is essential for informing policy decisions and developing sustainable solutions to the challenges posed by atmospheric composition and its impacts on the Earth system.