Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Light absorption enhancement of black carbon from urban haze in Northern China winter
Visa övriga samt affilieringar
Antal upphovsmän: 62017 (Engelska)Ingår i: Environmental Pollution, ISSN 0269-7491, E-ISSN 1873-6424, Vol. 221, s. 418-426Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Atmospheric black carbon (BC) is an important pollutant for both air quality and Earth's energy balance. Estimates of BC climate forcing remain highly uncertain, e.g., due to the mixing with non-absorbing components. Non-absorbing aerosols create a coating on BC and may thereby act as a lens which may enhance the light absorption. However, this absorption enhancement is poorly constrained. To this end a two-step solvent dissolution protocol was employed to remove both organic and inorganic coatings, and then investigate their effects on BC light absorption. Samples were collected at a severely polluted urban area, Jinan, in the North China Plain (NCP) during February 2014. The BC mass absorption cross-section (MAC) was measured for the aerosol samples before and after the solvent-decoating treatment, and the enhancement of MAC (E-MAC) from the coating effect was defined as the ratio. A distinct diurnal pattern for the enhancement was observed, with EMAC 1.3 +/- 0.3 (1 S.D.) in the morning, increasing to 2.2 +/- 1.0 in the afternoon, after that dropping to 1.5 +/- 0.8 in the evening-night. The BC absorption enhancement primarily was associated with urban-scale photochemical production of nitrate and sulfate aerosols. In addition to that, regional-scale haze plume with increasing sulfate levels strengthened the absorption enhancement. These observations offer direct evidence for an increased absorption enhancement of BC due to severe air pollution in China.

Ort, förlag, år, upplaga, sidor
2017. Vol. 221, s. 418-426
Nyckelord [en]
Black carbon, Aerosol mixing states, Radiative absorption, Lens effect, Urban air pollution
Nationell ämneskategori
Geovetenskap och miljövetenskap
Identifikatorer
URN: urn:nbn:se:su:diva-140295DOI: 10.1016/j.envpol.2016.12.004ISI: 000392767900044PubMedID: 27939628OAI: oai:DiVA.org:su-140295DiVA, id: diva2:1081267
Tillgänglig från: 2017-03-13 Skapad: 2017-03-13 Senast uppdaterad: 2017-11-29Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltextPubMed

Sök vidare i DiVA

Av författaren/redaktören
Andersson, AugustGustafsson, Örjan
Av organisationen
Institutionen för miljövetenskap och analytisk kemi
I samma tidskrift
Environmental Pollution
Geovetenskap och miljövetenskap

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
pubmed
urn-nbn

Altmetricpoäng

doi
pubmed
urn-nbn
Totalt: 84 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf