Matches in SemOpenAlex for { <https://semopenalex.org/work/W4297887695> ?p ?o ?g. }
Showing items 1 to 57 of
57
with 100 items per page.
- W4297887695 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> Radiocarbon (<sup>14</sup>C) analysis of carbonaceous aerosols is used for source apportionment, separating the carbon content into fossil vs. non-fossil origin, and is particularly useful when applied to subfractions of total carbon (TC), i.e., elemental carbon (EC), organic carbon (OC), water-soluble OC (WSOC), and water-insoluble OC (WINSOC). However, this requires an unbiased physical separation of these fractions, which is difficult to achieve. Separation of EC from OC using thermal-optical analysis (TOA) can cause EC loss during the OC removal step and form artificial EC from pyrolysis of OC (i.e., so-called charring), both distorting the <sup>14</sup>C analysis of EC. Previous work showed that water extraction reduces charring. Here, we apply a new combination of a WSOC extraction and <sup>14</sup>C analysis method with an optimised OC/EC separation that is coupled with a novel approach of thermal-desorption modelling for compensation of EC losses. As water-soluble components promote the formation of pyrolytic carbon, water extraction was used to minimise the charring artefact of EC, and the eluate subjected to chemical wet oxidation to CO<sub>2</sub> before direct <sup>14</sup>C analysis in a gas-accepting accelerator mass spectrometer (AMS). This approach was applied to 13 aerosol filter samples collected at the Arctic Zeppelin Observatory (Svalbard) in 2017 and 2018, covering all seasons, which bear challenges for a simplified <sup>14</sup>C source apportionment due to their low loading and the large portion of pyrolysable species. Our approach provided a mean EC yield of 0.87 ± 0.07 and reduced the charring to 6.5 % of the recovered EC amounts. The mean Fraction Modern (F<sup>14</sup>C) over all seasons was 0.85 ± 0.17 for TC, 0.61 ± 0.17 and 0.66 ± 0.16 for EC before and after correction with the thermal-desorption model, respectively, and 0.81 ± 0.20 for WSOC." @default.
- W4297887695 created "2022-10-01" @default.
- W4297887695 date "2022-09-21" @default.
- W4297887695 modified "2023-10-17" @default.
- W4297887695 title "Comment on egusphere-2022-625" @default.
- W4297887695 doi "https://doi.org/10.5194/egusphere-2022-625-rc2" @default.
- W4297887695 hasPublicationYear "2022" @default.
- W4297887695 type Work @default.
- W4297887695 citedByCount "0" @default.
- W4297887695 crossrefType "peer-review" @default.
- W4297887695 hasBestOaLocation W42978876951 @default.
- W4297887695 hasConcept C104779481 @default.
- W4297887695 hasConcept C107872376 @default.
- W4297887695 hasConcept C113196181 @default.
- W4297887695 hasConcept C140205800 @default.
- W4297887695 hasConcept C150394285 @default.
- W4297887695 hasConcept C159985019 @default.
- W4297887695 hasConcept C162711632 @default.
- W4297887695 hasConcept C178790620 @default.
- W4297887695 hasConcept C185592680 @default.
- W4297887695 hasConcept C192562407 @default.
- W4297887695 hasConcept C2781059571 @default.
- W4297887695 hasConcept C36759035 @default.
- W4297887695 hasConcept C43617362 @default.
- W4297887695 hasConcept C4725764 @default.
- W4297887695 hasConcept C73546260 @default.
- W4297887695 hasConceptScore W4297887695C104779481 @default.
- W4297887695 hasConceptScore W4297887695C107872376 @default.
- W4297887695 hasConceptScore W4297887695C113196181 @default.
- W4297887695 hasConceptScore W4297887695C140205800 @default.
- W4297887695 hasConceptScore W4297887695C150394285 @default.
- W4297887695 hasConceptScore W4297887695C159985019 @default.
- W4297887695 hasConceptScore W4297887695C162711632 @default.
- W4297887695 hasConceptScore W4297887695C178790620 @default.
- W4297887695 hasConceptScore W4297887695C185592680 @default.
- W4297887695 hasConceptScore W4297887695C192562407 @default.
- W4297887695 hasConceptScore W4297887695C2781059571 @default.
- W4297887695 hasConceptScore W4297887695C36759035 @default.
- W4297887695 hasConceptScore W4297887695C43617362 @default.
- W4297887695 hasConceptScore W4297887695C4725764 @default.
- W4297887695 hasConceptScore W4297887695C73546260 @default.
- W4297887695 hasLocation W42978876951 @default.
- W4297887695 hasOpenAccess W4297887695 @default.
- W4297887695 hasPrimaryLocation W42978876951 @default.
- W4297887695 hasRelatedWork W1982653185 @default.
- W4297887695 hasRelatedWork W1982981469 @default.
- W4297887695 hasRelatedWork W2032336941 @default.
- W4297887695 hasRelatedWork W2309703545 @default.
- W4297887695 hasRelatedWork W2370289452 @default.
- W4297887695 hasRelatedWork W3011510707 @default.
- W4297887695 hasRelatedWork W3146224411 @default.
- W4297887695 hasRelatedWork W3146255294 @default.
- W4297887695 hasRelatedWork W4289522784 @default.
- W4297887695 hasRelatedWork W4312412197 @default.
- W4297887695 isParatext "false" @default.
- W4297887695 isRetracted "false" @default.
- W4297887695 workType "peer-review" @default.