Publication Date:
2016-06-22
Description:
Simultaneous observations of atmospheric potential oxygen (APO=O 2 +1.1×CO 2 ) and air–sea O 2 flux, derived from dissolved oxygen in surface seawater, were carried out onboard the research vessel MIRAI in the northern North Pacific and the Arctic Ocean in the autumns of 2012–2014. A simulation of the APO was also carried out using a three-dimensional atmospheric transport model that incorporated a monthly air–sea O 2 flux climatology. By comparing the observed and simulated APO, as well as the observed and climatological air–sea O 2 fluxes, it was found that the large day-to-day variation in the observed APO can be attributed to the day-to-day variation in the local air–sea O 2 fluxes around the observation sites. It was also found that the average value of the observed air–sea O 2 fluxes was systematically higher than that of the climatological O 2 flux. This could explain the discrepancy between the observed and simulated seasonal APO cycles widely seen at various northern hemispheric observational sites in the fall season. Keywords: atmospheric potential oxygen, air-sea O 2 flux, ship observation (Published: 21 June 2016) Citation: Tellus B 2016, 68, 29972, http://dx.doi.org/10.3402/tellusb.v68.29972
Print ISSN:
0280-6509
Electronic ISSN:
1600-0889
Topics:
Geography
,
Physics
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