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Over 450 Argo profiling floats equipped with oxygen sensors have been deployed, but no quality control (QC) protocols have been adopted by the oceanographic community for use by Argo data centers. As a consequence, the growing float oxygen data set as a whole is not readily utilized for many types of biogeochemical studies. Here we present a simple procedure that can be used to correct first-order errors (offset and drift) in profiling float oxygen data by comparing float data to a monthly climatology (World Ocean Atlas 2009). Float specific correction terms for the entire array were calculated. This QC procedure was evaluated by (1) comparing the climatology-derived correction coefficients to those derived from discrete samples for 14 floats and (2) comparing correction coefficients for seven floats that had been calibrated twice prior to deployment (once in the factory and once in-house), with the second calibration ostensibly more accurate than the first. The corrections presented here constrain most float oxygen measurements to better than 3% at the surface.

Item Type:	Refereed Article
Keywords:	dissolved oxygen, oxygen sensor, profiling float, quality control
Research Division:	Earth Sciences
Research Group:	Climate change science
Research Field:	Climatology
Objective Division:	Environmental Management
Objective Group:	Air quality, atmosphere and weather
Objective Field:	Air quality, atmosphere and weather not elsewhere classified
UTAS Author:	Tilbrook, BD (Dr Bronte Tilbrook)
ID Code:	118959
Year Published:	2013
Web of Science® Times Cited:	66
Deposited By:	Zoology
Deposited On:	2017-07-24
Last Modified:	2017-10-16
Downloads:	129 View Download Statistics