Ammonia emissions from seabirds

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• Dr Stuart Riddick (Cambridge)
• Monday 02 June 2014, 14:15-15:30
• Unilever Lecture Theatre, Department of Chemistry.

If you have a question about this talk, please contact Dr Amanda Maycock.

Significant amounts of nitrogen are deposited on to land in various forms of excreta and the subsequent volatilization may result in substantial emissions of atmospheric ammonia (NH3). As a model system, the global NH3 emission of seabirds was calculated to examine the effects of climate on NH3 volatilization. To do this, a contemporary seabird database was used in conjunction with a seabird NH3 model (GUANO) to estimate NH3 emissions from seabirds in a range of climates. Field measurements of NH3 emissions at seabird colonies in various climates were used to validate model output. The results present a range of excreted nitrogen that volatilizes (Pv) of 0.4 to 70.6 in response to climatic differences. This model is further developed to estimate NH3 emission from agricultural animal manure and to characterize the effect of climate on Pv globally.

This talk is part of the Centre for Atmospheric Science seminars, Chemistry Dept. series.

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