Radiative efficiencies and global warming potentials of agricultural fumigants

Shine, K. P. ORCID: https://orcid.org/0000-0003-2672-9978 and Kang, Y. ORCID: https://orcid.org/0000-0001-9850-3981 (2023) Radiative efficiencies and global warming potentials of agricultural fumigants. Environmental Research Communications, 5 (5). 051007. ISSN 2515-7620 doi: 10.1088/2515-7620/acd511

Abstract/Summary

A rounded assessment of the environmental impacts of fumigants used within the agricultural sector must consider the potential climate impacts of their release into the atmosphere. Within policy settings, the 100-year Global Warming Potential (GWP100) is the most commonly used metric. While GWP100 values are available for the widely used fumigant sulfuryl fluoride, no estimates are available for 4 alternative fumigants: ethyl formate, cyanogen, hydrogen cyanide and phosphine. Existing laboratory measurements of the infrared spectra and reaction rate coefficients of these gases are used to produce new estimates of their radiative efficiencies and atmospheric lifetimes, and the first estimates of their GWP100 and other climate emission metrics. Although uncertainties are considerable, their GWP100 values are estimated to be no more than 2% of the GWP100 value of sulfuryl fluoride. These new estimates will enable informed estimates of the climate impact of the use of these fumigants, which must account for the differing usage and release rates to achieve the same fumigant efficacy.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/112038
Identification Number/DOI	10.1088/2515-7620/acd511
Refereed	Yes
Divisions	Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
Publisher	IOP Science
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