[en] Abstract Approximately 600 water samples from the South China Sea (SCS) and 250 water samples from the West Philippines Sea (WPS) were collected during seven cruises from August 2003 to July 2007 to determine nitrous oxide (N2O) distributions between the surface and a maximum depth of 4250 m. In the SCS, the average surface \{N2O\} concentration exceeded the atmospheric equilibrium concentration (on average 132 ± 23%); however in the WPS, the surface \{N2O\} concentration was lower than the atmospheric equilibrium concentration (on average 90 ± 22%). The \{N2O\} concentration reached a maximum (~23 nmol L−1) in the \{WPS\} at 800–1000 m, and (~28 nmol L−1) at a shallower depth of around 600–800 m in the SCS, owing to vertical mixing and intensive upwelling in the SCS. In the SCS, the surface \{N2O\} concentration was 7.59 ± 1.32 nmol L−1 and the calculated sea-to-air flux was 5.5 ± 3.9 μmol m−2 d−1. The surface \{N2O\} concentration in the WPS, 5.19 ± 1.26 nmol L−1, was lower than that in the SCS.
Research center :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Tseng, Hsiao-Chun
Chen, Chen-Tung Arthur
Borges, Alberto ; Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Chemical Oceanography Unit (AGO)
DelValls, T. Angel
Lai, Chao-Ming
Chen, Ting-Yu
Language :
English
Title :
Distributions and Sea-to-air Fluxes of Nitrous Oxide in the South China Sea and the West Philippines Sea
Publication date :
2016
Journal title :
Deep-Sea Research. Part I, Oceanographic Research Papers
ISSN :
0967-0637
eISSN :
1879-0119
Publisher :
Pergamon Press - An Imprint of Elsevier Science, Oxford, United Kingdom
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