In:
Journal of Geophysical Research: Atmospheres, American Geophysical Union (AGU), Vol. 101, No. D19 ( 1996-10-30), p. 23689-23697
Abstract:
In this paper we report on the first measurements of microbial soil emissions of nitric oxide (NO) and nitrous oxide (N 2 O) from the savannas in South Africa. In addition to natural, unperturbed emission measurements, we investigated the impact of natural rainfall, artificial irrigation, and fire on these emissions. Wetting and burning resulted in a significant enhancement in the emissions of NO. Mean background NO emissions from the dry sites ranged from 0.4 to 6.2 ng N m −2 s −1 and from the wetted sites ranged from 4.7 to 34.0 ng N m −2 s −1 . After burning, the mean NO emissions from the dry sites increased and ranged from 13.3 to 15.2 ng N m −2 s −1 and from the wetted sites increased, exceeding 60 ng N m −2 s −1 . Measurements of biogenic emissions of N 2 O were attempted, but emissions were not detected throughout the measurement period, indicating emissions below the minimum delectability of the instrumentation (2 ng N m −2 s −1 ).
Type of Medium:
Online Resource
ISSN:
0148-0227
Language:
English
Publisher:
American Geophysical Union (AGU)
Publication Date:
1996
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