Articles | Volume 15, issue 22
Atmos. Chem. Phys., 15, 12823–12843, 2015
https://doi.org/10.5194/acp-15-12823-2015
Atmos. Chem. Phys., 15, 12823–12843, 2015
https://doi.org/10.5194/acp-15-12823-2015

Research article 19 Nov 2015

Research article | 19 Nov 2015

Global evaluation of ammonia bidirectional exchange and livestock diurnal variation schemes

L. Zhu et al.

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Short summary
We implement new diurnal variation scheme for ammonia livestock emissions and bidirectional exchange scheme and its adjoint in the GEOS-Chem global chemical transport model. Updated diurnal variability improves modeled-to-hourly in situ measurements comparison. The ammonium soil pool in the bidirectional exchange model largely extends the ammonia lifetime in the atmosphere. Large model biases remain as livestock emissions are still underestimated.
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