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IJMS Vol.33(1) [March 2004] >


Title: Air-sea exchange of nitrous oxide and methane in the Arabian Sea: A simple model of the seasonal variability
Authors: Bange, Hermann W.
Keywords: Nitrous oxide
Methane
Arabian Sea
Air-sea exchange
Box model
Issue Date: Mar-2004
Publisher: CSIR
IPC CodeInt. Cl. ⁷ C09K 3/30
Abstract: With a simple box model the seasonal variability of N₂O and CH₄ were simulated in surface layers in the central and western Arabian Sea. The model was able to reproduce the N₂O measurements except for times when cold water filaments occur (i.e., during the SW monsoon). Based on the comparison of model results and measurements, it is concluded that the saturation of N₂O in the surface layer of the Arabian Sea is mainly controlled by (i) the wind-driven air-sea exchange during the SW monsoon, (ii) entrainment of N₂O from the subsurface layer, and (iii) sea surface temperature variability. However, the contribution of the factors listed above to the seasonality of the N₂O saturations is different in the selected areas. The overall good agreement of model results and the majority of N₂O measurements suggest that N₂O formation in the surface layer of the Arabian Sea is negligible. The comparison of model’s results and CH₄ measurements revealed a more complex situation, partly due to considerable inconsistencies in the available CH₄ data. Thus, the situation for CH₄ remains unresolved and inconclusive.
Page(s): 77-83
ISSN: 0379-5136
Source: IJMS Vol.33(1) [March 2004]

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