Change search
ReferencesLink to record
Permanent link

Direct link
Sources and light absorption of water-soluble organic carbon aerosols in the outflow from northern China
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM).
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM).
Show others and affiliations
2014 (English)In: Atmospheric Chemistry And Physics, ISSN 1680-7316, E-ISSN 1680-7324, Vol. 14, no 3, 1413-1422 p.Article in journal (Refereed) Published
Abstract [en]

High loadings of anthropogenic carbonaceous aerosols in Chinese air influence the air quality for over one billion people and impact the regional climate. A large fraction (17-80 %) of this aerosol carbon is water-soluble, promoting cloud formation and thus climate cooling. Recent findings, however, suggest that water-soluble carbonaceous aerosols also absorb sunlight, bringing additional direct and indirect climate warming effects, yet the extent and nature of light absorption by this water-soluble brown carbon and its relation to sources is poorly understood. Here, we combine source estimates constrained by dual carbon isotopes with light-absorption measurements of water-soluble organic carbon (WSOC) for a March 2011 campaign at the Korea Climate Observatory at Gosan (KCOG), a receptor station in SE Yellow Sea for the outflow from northern China. The mass absorption cross section at 365 nm (MAC(365)) of WSOC for air masses from N. China were in general higher (0.8-1.1 m(2) g(-1)), than from other source regions (0.3-0.8 m(2) g(-1)). However, this effect corresponds to only 2-10% of the radiative forcing caused by light absorption by elemental carbon. Radiocarbon constraints show that the WSOC in Chinese outflow had significantly higher fraction fossil sources (30-50 %) compared to previous findings in S. Asia, N. America and Europe. Stable carbon (delta C-13) measurements were consistent with aging during long-range air mass transport for this large fraction of carbonaceous aerosols.

Place, publisher, year, edition, pages
2014. Vol. 14, no 3, 1413-1422 p.
National Category
Meteorology and Atmospheric Sciences
URN: urn:nbn:se:su:diva-102493DOI: 10.5194/acp-14-1413-2014ISI: 000332384900017OAI: diva2:710471
Formas, 214-2009-970Knut and Alice Wallenberg Foundation


Other Funding agencies:

STINT Foundation 2010/072; Korean Center for Atmospheric and Earthquake Research;  Swedish Royal Academy of Sciences through Knut and Alice Wallenberg Foundation 

Available from: 2014-04-07 Created: 2014-04-07 Last updated: 2014-04-07Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Kirillova, ElenaAndersson, AugustGustafsson, Örjan
By organisation
Department of Applied Environmental Science (ITM)
In the same journal
Atmospheric Chemistry And Physics
Meteorology and Atmospheric Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 18 hits
ReferencesLink to record
Permanent link

Direct link