Sökning: id:"swepub:oai:DiVA.org:su-188912" >
Source Quantificati...
Source Quantification of South Asian Black Carbon Aerosols with Isotopes and Modeling
-
- Dasari, Sanjeev (författare)
- Stockholms universitet,Institutionen för miljövetenskap
-
- Andersson, August (författare)
- Stockholms universitet,Institutionen för miljövetenskap
-
Stohl, Andreas (författare)
-
visa fler...
-
Evangeliou, Nikolaos (författare)
-
- Bikkina, Srinivas (författare)
- Stockholms universitet,Institutionen för miljövetenskap
-
- Holmstrand, Henry (författare)
- Stockholms universitet,Institutionen för miljövetenskap
-
- Budhavant, Krishnakant (författare)
- Stockholms universitet,Institutionen för miljövetenskap,Maldives Meteorological Service, Republic of the Maldives; Indian Institute of Science, India
-
Salam, Abdus (författare)
-
- Gustafsson, Örjan (författare)
- Stockholms universitet,Institutionen för miljövetenskap
-
visa färre...
-
(creator_code:org_t)
- 2020-09-04
- 2020
- Engelska.
-
Ingår i: Environmental Science and Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 54:19, s. 11771-11779
- Relaterad länk:
-
https://doi.org/10.1...
-
visa fler...
-
https://pubs.acs.org...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- Black carbon (BC) aerosols perturb climate and impoverish air quality/ human health-affecting similar to 1.5 billion people in South Asia. However, the lack of source-diagnostic observations of BC is hindering the evaluation of uncertain bottom-up emission inventories (EIs) and thereby also models/policies. Here, we present dual-isotope-based (Delta C-14/delta C-13) fingerprinting of wintertime BC at two receptor sites of the continental outflow. Our results show a remarkable similarity in contributions of biomass and fossil combustion, both from the site capturing the highly populated highly polluted Indo-Gangetic Plain footprint (IGP; Delta C-14-f(biomass) = 50 +/- 3%) and the second site in the N. Indian Ocean representing a wider South Asian footprint (52 +/- 6%). Yet, both sites reflect distinct delta C-13-fingerprints, indicating a distinguishable contribution of C-4-biomass burning from peninsular India (PI). Tailored-model-predicted seasonaveraged BC concentrations (700 +/- 440 ng m(-3)) match observations (740 +/- 250 ng m(-3)), however, unveiling a systematically increasing model-observation bias (+19% to -53%) through winter. Inclusion of BC from open burning alone does not reconcile predictions (f(biomass) = 44 +/- 8%) with observations. Direct source-segregated comparison reveals regional offsets in anthropogenic emission fluxes in EIs, overestimated fossil-BC in the IGP, and underestimated biomass-BC in PI, which contributes to the model-observation bias. This ground-truthing pinpoints uncertainties in BC emission sources, which benefit both climate/air-quality modeling and mitigation policies in South Asia.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas