Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 45, Issue 9, Pages 4410-4418Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2018GL077517
Keywords
aerosol; direct radiative forcing; air quality; feedback
Categories
Funding
- Research Grants Council of Hong Kong [CUHK24301415]
- National Key Basic Research Program of China [2015CB954103]
- Improvement on Competitiveness in Hiring New Faculties Fund of The Chinese University of Hong Kong [4930059]
- Vice-Chancellor's Discretionary Fund of The Chinese University of Hong Kong [4930744]
- MIT Greater China Fund for Innovation
Ask authors/readers for more resources
Literature has reported the remarkable aerosol impact on low-level cloud by direct radiative forcing (DRF). Impacts on middle-upper troposphere cloud are not yet fully understood, even though this knowledge is important for regions with a large spatial heterogeneity of emissions and aerosol concentration. We assess the aerosol DRF and its cloud response in June (with strong convection) in Pearl River Delta region for 2008-2012 at cloud-resolving scale using an air quality-climate coupled model. Aerosols suppress deep convection by increasing atmospheric stability leading to less evaporation from the ground. The relative humidity is reduced in middle-upper troposphere due to induced reduction in both evaporation from the ground and upward motion. The cloud reduction offsets 20% of the aerosol DRF. The weaker vertical mixing further increases surface aerosol concentration by up to 2.90 mu g/m(3). These findings indicate the aerosol DRF impact on deep convection and in turn regional air quality.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available