Differences in nitrous oxide distribution patterns between the Bering Sea basin and Indian Sector of the Southern Ocean

CHEN Liqi; ZHANG Jiexia; ZHAN Liyang; LI Yuhong; SUN Heng

doi:10.1007/s13131-014-0484-8

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Article Navigation > Acta Oceanologica Sinica > 2014 > 33(6): 9-19

CHEN Liqi, ZHANG Jiexia, ZHAN Liyang, LI Yuhong, SUN Heng. Differences in nitrous oxide distribution patterns between the Bering Sea basin and Indian Sector of the Southern Ocean[J]. Acta Oceanologica Sinica, 2014, 33(6): 9-19. doi: 10.1007/s13131-014-0484-8

Citation:

CHEN Liqi, ZHANG Jiexia, ZHAN Liyang, LI Yuhong, SUN Heng. Differences in nitrous oxide distribution patterns between the Bering Sea basin and Indian Sector of the Southern Ocean[J]. Acta Oceanologica Sinica, 2014, 33(6): 9-19. doi: 10.1007/s13131-014-0484-8

Citation:

CHEN Liqi, ZHANG Jiexia, ZHAN Liyang, LI Yuhong, SUN Heng. Differences in nitrous oxide distribution patterns between the Bering Sea basin and Indian Sector of the Southern Ocean[J]. Acta Oceanologica Sinica, 2014, 33(6): 9-19. doi: 10.1007/s13131-014-0484-8

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Differences in nitrous oxide distribution patterns between the Bering Sea basin and Indian Sector of the Southern Ocean

doi: 10.1007/s13131-014-0484-8

1.
College of Ocean and Earth Science, Xiamen University, Xiamen 361005, China;Key Laboratory of Global Change and Marine-Atmospheric Chemistry of State Oceanic Administration, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China
2.
Key Laboratory of Global Change and Marine-Atmospheric Chemistry of State Oceanic Administration, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China

Received Date: 2013-03-30
Rev Recd Date: 2013-06-28

Abstract

Abstract

Nitrous oxide (N₂O) distribution patterns in the Bering Sea basin (BSB) and Indian Sector of the Southern Ocean (ISSO) were described and compared. In both sites, the waters were divided into four layers: surface layer, subsurface layer, N₂O maximum layer, and deep water. Simulations were made to find out the most important factors that regulate the N₂O distribution patterns in different layers of both sites. The results showed that in the surface water, N₂O was more understaturated in the ISSO than the BSB. This phenomenon in the surface water of ISSO may result from ice melt water intrusion and northeastward transport of the Antarctic surface water. Results of the rough estimation of air-sea fluxes during the expedition were (-0.34±0.07)-(-0.64±0.13) μmol/(m²·d) and (-1.47±0.42)-(-1.77±0.51) μmol/(m²·d) for the BSB and the ISSO, respectively. Strongly stratified surface layer and temperature minimum layer restricted exchange across the thermocline. The N₂O maximum existed in higher concentration and deeper in the BSB than the ISSO, but their contribution to the upper layer by eddy diffusions was negligible. In deep waters, a concentration difference of 5 nmol/L N₂O between these two sites was found, which suggested that N₂O production occurred during thermohaline circulation. N₂O may be a useful tracer to study important large-scale hydrographic processes.
- nitrous oxide,
- Bering Sea basin,
- Southern Ocean,
- distribution

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References(61)

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