John Lynch

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John Lynch

Postdoctoral Researcher

My research focuses on the climate impacts of agriculture, particularly livestock production.

Most agricultural climate assessments to date (in both the general media and scientific literature) are based on the 100-year Global Warming Potential (GWP100), a metric that describes emissions of different greenhouse gases (GHGs) as equivalent quantities of carbon dioxide (CO2). This metric can misrepresent the climate impacts of different gases, particularly those with short atmospheric lifespans (i.e. methane), and cannot be used to set targets based on specific temperatures or cumulative emissions budgets. As a large proportion of livestock emissions are not CO2, we must use alternative approaches to assess their climate impacts. My work addresses this topic using energy-balance climate models and an alternative application of the GWP metric, GWP*, that provides a better framework for equating different gases by considering changes in the rate of short-lived gases as equivalent to one-off releases of long-lived GHGs.