Black Carbon and its Impacts on Climate

Black Carbon and its Impacts on Climate

Geethapriyan. G1, Sathyamoorthy. G. L2

1PG student, Dept of civil Engineering, Kumaraguru college of technology, Coimbatore-641049, India 2professor, Dept of civil Engineering, Kumaraguru college of technology, Coimbatore-641049, India

Abstract

Black carbon, a form of fine particulate matter composed of soot and other carbonaceous particles, is generated through the incomplete combustion of fossil fuels, biomass, and biofuels. As a short-lived climate pollutant, black carbon has gained significant attention due to its detrimental effects on climate change and human health. This abstract aims to provide an overview of the key aspects surrounding black carbon and its impacts on the Earth's climate system. Black carbon exerts both direct and indirect influences on the climate. As a direct radiative forcing agent, it absorbs sunlight and traps heat in the atmosphere, contributing to the warming of the planet. Furthermore, black carbon particles deposited on snow and ice surfaces decrease their albedo, accelerating melting and reducing the Earth's overall reflectivity. These effects have implications for regional and global climate patterns, altering temperature profiles, precipitation patterns, and atmospheric circulation. In addition to its radiative properties, black carbon also plays a role in atmospheric chemistry. When emitted into the atmosphere, it interacts with other pollutants, modifying their lifetimes and impacts. Black carbon particles can act as cloud condensation nuclei, affecting cloud formation and properties, thus influencing the Earth's energy balance. Moreover, the deposition of black carbon on land and water surfaces can disrupt ecosystems and contribute to the acidification of oceans.

Key words: Black carbon, climate change, radiative forcing, optical depth