20.500.12556/RUNG-5652
Substantial brown carbon emissions from wintertime residential wood burning over France
Brown carbon (BrC) is known to absorb light at subvisible wavelengths but its optical properties and sources are still poorly documented, leading to large uncertainties in climate studies. Here, we show its major wintertime contribution to total aerosol absorption at 370 nm (18–42%) at 9 different French sites. Moreover, an excellent correlation with levoglucosan (r2 = 0.9 and slope = 22.2 at 370 nm), suggesting important contribution of wood burning emissions to ambient BrC aerosols in France. At all sites, BrC peaks were mainly observed during late evening, linking to local intense residential wood burning during this time period. Furthermore, the geographic origin analysis also highlighted the high potential contribution of local and/or small-regional emissions to BrC. Focusing on the Paris region, twice higher BrC mass absorption efficiency value was obtained for less oxidized biomass burning organic aerosols (BBOA) compared to more oxidized BBOA (e.g., about 4.9 ± 0.2 vs. 2.0 ± 0.1 m2 g−1, respectively, at 370 nm). Finally, the BBOA direct radiative effect was found to be 40% higher when these two BBOA fractions are treated as light-absorbing species, compared to the non-absorbing BBOA scenario.
Brown carbon
Multi sites
Residential wood burning
Mass absorption efficiency
France
true
true
false
Angleški jezik
Ni določen
Delo ni kategorizirano
2020-07-12 15:29:34
2020-07-20 08:43:26
2023-06-09 03:39:41
0000-00-00 00:00:00
2020
0
0
11
743
2020
0000-00-00
Zaloznikova
NiDoloceno
NiDoloceno
0000-00-00
0000-00-00
0000-00-00
22976259
10.1016/j.scitotenv.2020.140752
URN:SI:UNG:REP:STBSMUPJ
Univerza v Novi Gorici
0
1
0