Format:
Online-Ressource
ISSN:
1680-7324
Content:
Abstract M rBC ng m - 3 and a relatively constant rBC core mass-equivalent diameter of about 180 nm, which are typical values for remote mountain sites. Combining the M rBC rBC) of 9.2 ± m 2 g - 1 at λ = 880 nm has been obtained, which corresponds to an absorption enhancement (E abs ∼ 2.2 compared to that of bare rBC particles with equal rBC core size distribution. A significant reduction in the Δ M rBC/Δ CO E abs M rBC E abs M rBC E abs M rBC M rBC Δ M rBC/Δ CO M rBC E abs E abs ∼ 2.9 observed at midday. We suggest that this daily variation may result from a photochemical process driving the rBC mixing state rather than a change in BC emission sources. Such direct 2-year observations of BC properties provide quantitative constraints for both regional and global climate models and have the potential to close the gap between model-predicted and observed effects of BC on the regional radiation budget and climate. The results demonstrate the complex influence of BC emission sources, transport pathways, atmospheric dynamics and chemical reactivity in driving the light absorption of BC.
In:
volume:24
In:
number:3
In:
year:2024
In:
pages:1801-1824
In:
extent:24
In:
Atmospheric chemistry and physics, Katlenburg-Lindau : EGU, 2001-, 24, Heft 3 (2024), 1801-1824 (gesamt 24), 1680-7324
Language:
English
DOI:
10.5194/acp-24-1801-2024
URN:
urn:nbn:de:101:1-2024021503361601823988
URL:
https://doi.org/10.5194/acp-24-1801-2024
URL:
https://nbn-resolving.org/urn:nbn:de:101:1-2024021503361601823988
URL:
https://d-nb.info/1319423108/34
URL:
https://acp.copernicus.org/articles/24/1801/2024/acp-24-1801-2024.pdf
URL:
https://acp.copernicus.org/articles/24/1801/2024/