Abstract
Climate change remains a pressing global concern, with aerosols emerging as pivotal elements that wield substantial influence over the Earth’s climate dynamics. Aerosols, minuscule solid or liquid particles suspended in the atmosphere, exhibit a size range spanning from nanometers to tens of micrometers. Their impact on the atmosphere’s temperature is dual, engendering either warming or cooling effects, contingent upon the aerosol type. Consequently, it becomes imperative to comprehensively grasp the intricacies of aerosols and their inherent characteristics. In this study, we center our attention on the investigation of key aerosol optical properties, specifically the asymmetry parameter (ASY), aerosol optical depth (AOD), and single scattering albedo (SSA). Our research delves into the spatio-temporal distribution patterns of these aerosol optical properties across four distinct locations within India, namely Gandhi College, Kanpur, Jaipur, and Pune. These selected sites encompass the major classifications of aerosols, encompassing both anthropogenic and natural sources. Within the purview of these available aerosol optical properties, we endeavor to quantify the direct aerosol radiative forcing (DARF). To further enhance the rigor of our findings, we employ the control variable method to assess the uncertainty associated with direct aerosol radiative forcing concerning aerosol optical properties. Our results underscore that the asymmetry parameter (ASY) exerts a relatively minor influence on DARF, while single scattering albedo (SSA) and aerosol optical depth (AOD) wield substantial impact. Furthermore, this influence is contingent upon the specific aerosol type and exhibits notable regional variations, as different parameters manifest diverse effects contingent upon their respective geographical contexts.
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Abbreviations
- AOP:
-
Aerosol Optical Properties
- SSA:
-
Single scattering albedo
- ASY:
-
Asymmetry parameter
- AOD:
-
Aerosol Optical Depth
- AERONET:
-
Aerosol Robotic Network
- DARF:
-
Direct Aerosol Radiative Forcing
- TOA:
-
Top of the atmosphere
- SUR:
-
At the surface
- ATM:
-
At/within the atmosphere
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Acknowledgements
The researchers are grateful for the support and assistance from the Karunya Institute of Technology and Sciences, TN, India, in submitting the work. The AERONET team (http://aeronet.gsfc.nasa.gov/), which provided the data on aerosol optical characteristics, has our sincere gratitude. Each site used in this research was established and is kept up by the (PI(s)/Co-I(s)) and their team, for which we are grateful.
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Gautam, S., Blessy, A., Abhilash, P. et al. Exploring radiative forcing sensitivity to aerosol optical properties across varied geographical regions in India. Air Qual Atmos Health (2024). https://doi.org/10.1007/s11869-024-01537-y
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DOI: https://doi.org/10.1007/s11869-024-01537-y