Ammonia emissions from a Cape fur seal colony, Cape Cross, Namibia
Article first published online: 11 FEB 2006
Copyright 2006 by the American Geophysical Union.
Geophysical Research Letters
Volume 33, Issue 3, February 2006
How to Cite
2006), Ammonia emissions from a Cape fur seal colony, Cape Cross, Namibia, Geophys. Res. Lett., 33, L03812, doi:10.1029/2005GL024384., , , , , and (
- Issue published online: 11 FEB 2006
- Article first published online: 11 FEB 2006
- Manuscript Accepted: 23 NOV 2005
- Manuscript Revised: 20 OCT 2005
- Manuscript Received: 12 AUG 2005
 Large animal colonies are significant sources of atmospheric NH3 that can potentially increase the nitrogen status of nearby ecosystems. Atmospheric NH3 concentrations were measured at different distances from a Cape fur seal colony at Cape Cross, northwest coast of Namibia, and an atmospheric dispersion model was applied inversely to estimate the total NH3 emission. Mean concentrations ranged from 354 to 0.01 μg NH3 m−3 at 0.01 and 26 km from the source, respectively. The model simulations suggest that the colony emits 25–70 tonnes of NH3-N yr−1, c. 3% of the total N excreted by the seals.