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dc.contributor.author
Gruber, Nicolas
dc.contributor.author
Doney, Scott C.
dc.contributor.author
Emerson, Steven R.
dc.contributor.author
Gilbert, Denis
dc.contributor.author
Kobayashi, Taiyo
dc.contributor.author
Körtzinger, Arne
dc.contributor.author
Johnson, Gregory C.
dc.contributor.author
Johnson, Kenneth S.
dc.contributor.author
Riser, Stephen C.
dc.contributor.author
Ulloa, Osvaldo
dc.date.accessioned
2017-06-08T17:52:48Z
dc.date.available
2017-06-08T17:52:48Z
dc.date.issued
2007
dc.identifier.uri
http://hdl.handle.net/20.500.11850/7670
dc.description.abstract
This white paper justifies and outlines a new international joint Argo-Oxygen program in order to determine, on a global-scale, seasonal to decadal time-scale variations in sub-surface dissolved oxygen concentrations. We propose to achieve this goal by adding dissolved oxygen sensors to the floats of the successful Argo array, thus extending its measurement capabilities. This Argo-Oxygen program is motivated by the fact that oceanic dissolved oxygen concentration is a key quantity for ocean ecology and biogeochemistry. It permits study and quantification of a diverse and crucial set of processes. These processes include the detection of the oceanic impact of global warming on ocean biogeochemistry and circulation, the addition of unprecedented constraints on the export of biologically formed organic matter, and improved estimates of the oceanic uptake of anthropogenic CO2. The addition of oxygen to the currently measured suite of temperature and salinity on Argo will represent a revolutionary step in our ability to observe the ocean’s evolution over time, integrating biogeochemical and physical observations. This prospect is made possible by the success of the Argo program and the recent development of dissolved oxygen sensors that are both precise and stable over extended periods and can be easily integrated with the currently used Argo floats. Achieving the main goal of the Argo-Oxygen program does not require any appreciable changes in the deployment and operating strategies of the current Argo program and can therefore be implemented without significant negative impacts on the Argo core mission. Experience with the more than 70 Argo floats that have already been deployed with dissolved oxygen sensors suggests that the technology is ready for a first large-scale experiment, but that further evaluation and testing is needed before a global implementation is possible. We therefore propose that the Argo-Oxygen program be implemented in two phases. In the pilot phase, one or two test regions will be seeded extensively with floats, many of which will contain two oxygen sensors. The region’s oxygen distribution will then be repeatedly sampled using shipboard measurements over a period of two years in order to determine accurately the long-term changes in sensor accuracy and precision. Network optimization studies as well as first attempts at ingesting the data into diagnostic models will complete the pilot phase. The global implementation will build on the experiences gathered during this pilot phase and will take advantage of the network optimization studies aimed at determining the optimal number of oxygen sensors required to achieve the scientific goals. The costs of the proposed Argo-Oxygen program must be fully borne by new funds that will have to be raised over and above the core funding of Argo. The cost will depend on the yet-to-be-determined size of the program (the number of floats with oxygen sensors) and the additional costs per Argo float with an oxygen sensor. The latter costs are determined by the cost of the oxygen sensor, as well as the costs that arise from the increased energy demand affecting the float life time, the costs associated with the likely required calibration of the oxygen sensor, and the costs of communication, data handling, data quality control, and data storage. Based on current technology and experience, the total lifetime cost of an Argo float with oxygen is estimated to be roughly 40% higher than that of a standard Argo float. The proposed program will add substantial value to Argo by significantly broadening the scientific scope and expanding the number of Argo data users, as well as by creating new synergies between the physical and the biogeochemical ocean research communities. The new observations will also contribute to the activities of various international networks and partnerships for Earth Observing Systems, such as the Climate Observing System/Global Ocean Observing System GCOS/ GOOS.
dc.language.iso
en
dc.publisher
International Ocean Colour Coordinating Group
dc.title
The ARGO-Oxygen Program
dc.type
Working Paper
ethz.title.subtitle
A white paper to promote the addition of oxygen sensors to the international Argo float program
ethz.size
60 p.
ethz.notes
.
ethz.publication.place
Unknown
ethz.publication.status
published
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02721 - Inst. f. Biogeochemie u. Schadstoffdyn. / Inst. Biogeochem. and Pollutant Dynamics::03731 - Gruber, Nicolas / Gruber, Nicolas
ethz.leitzahl
03267 - Imboden, Dieter
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02721 - Inst. f. Biogeochemie u. Schadstoffdyn. / Inst. Biogeochem. and Pollutant Dynamics::03731 - Gruber, Nicolas / Gruber, Nicolas
ethz.leitzahl.certified
03267 - Imboden, Dieter
ethz.identifier.url
http://www.ioccg.org/groups/Oxygen_Argo_whitepaper_15feb07_r.pdf
ethz.date.deposited
2017-06-08T17:53:06Z
ethz.source
ECIT
ethz.identifier.importid
imp59364bb79f80356029
ethz.ecitpid
pub:18259
ethz.eth
yes
ethz.availability
Metadata only
ethz.rosetta.installDate
2017-07-15T08:45:14Z
ethz.rosetta.lastUpdated
2019-02-02T04:26:50Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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