A Decadal, Temporal and Seasonal Variation of Black Carbon Aerosol at High Altitude Region of Ooty, Tamil Nadu, India

Climate change is accelerating at an unprecedented pace due to escalating greenhouse gas emissions, emphasizing the urgency of understanding its drivers. Aerosols present in the atmosphere, play an significant role in the intricate climate system. In this study, we examine the temporal and seasonal trends of black carbon aerosol, a significant contributor to warming, in the high-altitude locale of Ooty, Tamil Nadu, India. Utilizing the Aethalometer instrument, this research presents a comprehensive analysis of black carbon concentrations over a decade (2013-2023). Observations reveal distinct patterns, with higher concentrations during certain months and seasons. Specifically, April consistently exhibited the highest concentrations, while the monsoon season recorded the lowest. The exceptional decline in 2020, attributed to COVID-19 lockdown measures, highlights the significant role of anthropogenic activities.

These findings underscore the significance of proactive black carbon monitoring in regions like Ooty. The study contributes valuable insights into the complex interplay between black carbon aerosols and climate systems, especially in high-altitude environments. It underscores the need for continued research to comprehensively understand black carbon's implications on local and global climate dynamics. In conclusion, this research establishes a foundation for grasping the intricate dynamics of black carbon aerosols in Ooty and serves as a stepping stone for broader insights into their role in shaping climate patterns and effects. By addressing these critical knowledge gaps, we can better inform mitigation strategies and policy decisions aimed at tackling climate change.