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N 2 O/ 222 Rn ‐ soil flux calibration in the stable nocturnal surface layer
Author(s) -
Conen Franz,
Neftel Albrecht,
Schmid Martin,
Lehmann Bernhard E.
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2001gl013429
Subject(s) - flux (metallurgy) , nocturnal , physics , surface layer , analytical chemistry (journal) , atmospheric sciences , layer (electronics) , chemistry , environmental chemistry , organic chemistry , astronomy
Concentration changes of N 2 O and 222 Rn were monitored in the surface layer above a grass sward during the first half of two calm nights. N 2 O flux on a local or field scale was then estimated from the ratio of the concentration differences between 0.1m and 0.4m height and the directly measured 222 Rn flux. This estimate (∼7 g N 2 O‐N ha −1 d −1 ) was between the N 2 O flux on a larger scale (∼4.5 g N 2 O‐N ha −1 d −1 ), as estimated from changes in the N 2 O/ 222 Rn ratio over time, and the small scale flux on the grass plot (∼50 g N 2 O‐N ha −1 d −1 ) as measured with closed chambers.