Journal
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
Volume 1, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41612-018-0056-2
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Funding
- COLOSSAL COST action [CA16109]
- EU-FP7 [262254, 654109]
- French Research Council (CNRS)
- French ministry of Environment and the reference laboratory for air quality monitoring (LCSQA)
- China Scholarship Council (CSC)
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Atmospheric black carbon (BC) has a strong positive, but still controversial, effect on global warming. In particular, BC absorption enhancement (E-abs) due to internal mixing with other chemical species-so-called lensing effect-is poorly assessed. This bottleneck partly relies on the lack of long-term in situ measurements of both the optical and chemical properties of BC-containing particles. Here, we present experimental and computational results showing a significant E-abs increase with the aerosol photochemical aging. This was associated with the production of highly oxidized secondary organic aerosols (SOA), especially at summertime. The 3-year-long continuous aerosol chemical and optical measurements used for the present study was obtained in the Paris region, France, which might be representative of near-future air quality within developing countries. These findings suggest that SOA could represent one of the most critical chemical species to be considered within climate models.
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