Black Carbon's Dance with the Weather
The Role of Black Carbon in Weather Changes: A Study on India's Monsoons
Understanding Black Carbon (BC) and Its Impact
In India, the role of black carbon (BC) in weather changes, particularly its influence on monsoons, fog, and heatwaves, has been largely unexplored. This study aims to bridge that gap by examining how BC interacts with rain during the monsoon's active and break phases—critical periods for farming, water supplies, and weather patterns.
Key Findings from Rural and Urban Data
- Diurnal Patterns: BC levels exhibit significant fluctuations throughout the day.
- Peak Times:
- Evening: 8 PM to 11 PM
- Morning: 7 AM to 9 AM
Likely influenced by human activities and weather conditions.
- Seasonal Variations:
- Lowest Levels: During the monsoon, as rain washes away aerosols.
- Highest Levels: Post-monsoon, primarily due to agricultural burning.
Weather Factors Influencing BC Dynamics
- Temperature: Higher temperatures increase BC levels.
- Humidity: Lower humidity correlates with higher BC levels.
- Rain: Reduces BC levels by washing away aerosols.
- Wind: Aids in the dispersion of BC, affecting its concentration and distribution.
Impact on Weather Events
The study also investigated the role of BC in:
- Pre-monsoon heatwaves
- Winter fog
- Monsoon conditions
It was found that local weather factors such as temperature inversions and wind patterns significantly influence how BC affects weather.
Implications for Air Quality and Policy
This research underscores the importance of considering meteorological factors in air quality management and policymaking. It paves the way for targeted strategies to mitigate the harmful effects of BC on health and the environment in India.
