|COMMUNITY WHITE PAPER||10.5270/OceanObs09.cwp.32|
Argo - A Decade of Progress
Howard J. Freeland(1), Dean Roemmich(2), Silvia L. Garzoli(3), Pierre-Yves LeTraon(4), Muthalagu Ravichandran(5), Stephen Riser(6), Virginie Thierry(7), Susan Wijffels(8), Mathieu Belbéoch(9), John Gould(10), Fiona Grant(11), Mark Ignazewski(12), Brian King(13), Birgit Klein(14), Kjell Arne Mork(15), Breck Owens(16), Sylvie Pouliquen(17), Andreas Sterl(18), Toshio Suga(19), Moon-Sik Suk(20), Philip Sutton(21), Ariel Troisi(22), Pedro Joaquin Vélez-Belchi (23), Jianping Xu(24)
Download this paper »
The primary goal of Argo, as enunciated in the original prospectus (, page 5), was to create a global network of instruments integrated with other elements of the climate observing system:
-? to detect climate variability on seasonal to decadal time-scales. The targeted variability includes changes in the large-scale distribution of temperature and salinity and in the transport of these properties by large-scale ocean circulation.
-? to deliver information needed for calibration of satellite measurements, and
-? to provide data for initialization and constraint of climate models.
To accomplish this it was proposed to deploy a large array of profiling floats measuring temperature and salinity to 2000 metres and reporting in real-time every 10 days. The proposal suggested a global spacing of 3° ? 3° which was based on (i) previous design studies from the global XBT networks, (ii) spatial statistics from satellite altimetry, and (iii) sampling experiments using WOCE hydrographic sections. The 3° ? 3° network would yield a formal error of estimation for near surface temperature of less than 0.5°C, which was equivalent to an error in bimonthly surface heat fluxes of 15 W/m2. Such spacing required an array of 3300 instruments between 60°S and 60°N. The instruments were planned to sample every 10 days, a choice informed by a need for many independent samples on seasonal and longer time-scales, knowledge of ocean variability and the existence of a satellite altimeter already sampling at 10-day intervals. A decade later, how well have these initial objectives been met?
Correspondence should be addressed to E-mail: email@example.com
This paper shall be cited as:
Freeland, H. & Co-Authors (2010). "Argo - A Decade of Progress" in Proceedings of OceanObs’09: Sustained Ocean Observations and Information for Society (Vol. 2), Venice, Italy, 21-25 September 2009, Hall, J., Harrison, D.E. & Stammer, D., Eds., ESA Publication WPP-306, doi:10.5270/OceanObs09.cwp.32
Rights to reproduction of individual articles are held by the authors. The source of the article (these proceedings) shall be cited.