An approach to sulfate geoengineering with surface emissions of carbonyl sulfide

Abstract SO 2 Tg - S yr - 1 artificial global flux of COS, which is geographically distributed following the present-day anthropogenic COS surface emissions (SG-COS-SRF) or a 6 Tg - S yr - 1 injection of COS in the tropical upper troposphere (SG-COS-TTL). The budget of COS and sulfur species is discussed, as are the effects of both SG-COS strategies on the stratospheric sulfate aerosol optical depth (∼ Δ τ = 0.080 in the years 2046–2055), aerosol effective radius (0.46 µ m), surface SO x + + ∼ - 1.5  W m - 2 in all-sky conditions in both SG-COS experiments). Indirect effects on ozone, methane and stratospheric water vapour are also considered, along with the COS direct contribution. According to our model results, the resulting net RF is - W m - 2, for SG-COS-SRF, and - W m - 2, for SG-COS-TTL, and it is comparable to the corresponding RF of - W m - 2 obtained with a sustained injection of 4 Tg - S yr - 1 in the tropical lower stratosphere in the form of SO 2 ∼ 5  DU versus + - - - + 5.8 % increase in the SG-SO2 experiment). Overall, we find that an increase in COS emissions may be feasible and produce a more latitudinally uniform forcing without the need for the deployment of stratospheric aircraft. However, our assumption that the rate of COS uptake by soils and plants does not vary with increasing COS concentrations will need to be investigated in future work, and more studies are needed on the prolonged exposure effects to higher COS values in humans and ecosystems.

Objekt anzeigen

• Standort: Deutsche Nationalbibliothek Frankfurt am Main
• Umfang: Online-Ressource
• Sprache: Englisch

Verweise und Beziehungen

• Erschienen in: An approach to sulfate geoengineering with surface emissions of carbonyl sulfide ; volume:22 ; number:9 ; year:2022 ; pages:5757-5773 ; extent:17 ; Atmospheric chemistry and physics ; 22, Heft 9 (2022), 5757-5773 (gesamt 17)

Beteiligte, Orts- und Zeitangaben

• Urheber: Quaglia, Ilaria ; Visioni, Daniele ; Pitari, Giovanni ; Kravitz, Ben

Weitere Informationen

• DOI: 10.5194/acp-22-5757-2022
• URN: urn:nbn:de:101:1-2022050505160541126633
• Rechteinformation: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.