Sea surface temperature (SST) measurements are required by operational ocean and atmospheric forecasting systems to constrain modeled upper ocean circulation and thermal structure. The Global Ocean Data Assimilation Experiment (GODAE) High Resolution SST Pilot Project (GHRSST-PP) was initiated to address these needs by coordinating the provision of accurate, high-resolution, SST products for the global domain. The pilot project is now complete, but activities continue within the Group for High Resolution SST (GHRSST). The pilot project focused on harmonizing diverse satellite and in situ data streams that were indexed, processed, quality controlled, analyzed, and documented within a Regional/Global Task Sharing (R/GTS) framework implemented in an internationally distributed manner. Data with meaningful error estimates developed within GHRSST are provided by services within R/GTS. Currently, several terabytes of data are processed at international centers daily, creating more than 25 gigabytes of product. Ensemble SST analyses together with anomaly SST outputs are generated each day, providing confidence in SST analyses via diagnostic outputs. Diagnostic data sets are generated and Web interfaces are provided to monitor the quality of observation and analysis products. GHRSST research and development projects continue to tackle problems of instrument calibration, algorithm development, diurnal variability, skin temperature deviation, and validation/verification of GHRSST products. GHRSST also works closely with applications and users, providing a forum for discussion and feedback between SST users and producers on a regular basis. All data within the GHRSST R/GTS framework are freely available. This paper reviews the progress of GHRSST-PP, highlighting achievements that have been fundamental to the success of the pilot project.

Donlon, C.J., K.S. Casey, I.S. Robinson, C.L. Gentemann, R.W. Reynolds, I. Barton, O. Arino, J. Stark, N. Rayner, P. LeBorgne, D. Poulter, J. Vazquez-Cuervo, E. Armstrong, H. Beggs, D. Llewellyn-Jones, P.J. Minnett, C.J. Merchant, and R. Evans. 2009. The GODAE High-Resolution Sea Surface Temperature Pilot Project. Oceanography 22(3):34–45, https://doi.org/10.5670/oceanog.2009.64.

Blower, J.D., F. Blanc, M. Clancy, P. Cornillon, C. Donlon, P. Hacker, K. Haines, S.C. Hankin, T. Loubrieu, S. Pouliquen, and others. 2009. Serving GODAE data and products to the ocean community. Oceanography 22(3):70–79.
1. Donlon, C.J. 2002. Proceedings from the Second GODAE High Resolution SST Pilot Project Workshop. NASDA/EORC, Tokyo, Japan, May 13–16, 2002, 88 pp. Available online at: http://www.ghrsst-pp.org/documents.htm?parent=68 (accessed July 4, 2009).
2. Donlon, C.J. 2003. Proceedings from the Third GODAE High Resolution SST Pilot Project Workshop. ESA/ESRIN, Frascati, Italy, December 2–4, 2003, International GHRSST-PP Project Office, Exeter UK, 141 pp. Available online at: http://www.ghrsst-pp.org/documents.htm?parent=68 (accessed July 4, 2009).
3. Donlon, C.J., and the GHRSST-PP Science Team. 2006. The GHRSST-PP Data Processing Specification Version 1.6. 41 pp. Available online at: http://www.ghrsst-pp.org/documents.htm?parent=50 (accessed July 4, 2009).
4. Donlon, C.J., and the GHRSST-PP Science Team. 2007. The Global Ocean Data Assimilation Project (GODAE) High Resolution Sea Surface Temperature Pilot Project (GHRSST-PP). Bulletin of the American Meteorological Society 88:1,197–1,213.
5. GCOS (Global Climate Observing System). 2004. Implementation Plan for the Global Observing System for Climate in Support of the UNFCCC. World Meteorological Organization, Geneva, Switzerland, GCOS-92, WMO/TD No. 1219, 153 pp. Available online at: http://www.wmo.int/pages/prog/gcos/index.php?name=GCOSReportstoUNFCCC (accessed July 4, 2009).
6. Reynolds, R.W., and T.M. Smith. 1994. Improved global sea surface temperature analyses using optimum interpolation. Journal of Climate 7:929–948.
7. Reynolds, R.W., T.M. Smith, C. Liu, D.B. Chelton, K.S. Casey, and M.G. Schlax. 2007. Daily high-resolution blended analyses for sea surface temperature. Journal of Climate 20:5,473–5,496.
8. Smith, N.R. 2000. A GODAE workshop: Prospectus for a GODAE High Resolution SST Pilot Project. Report from European Commission Joint Research Centre, Ispra, Italy, October 30–November 1, 2000. Available from the International GHRSST Project Office, http://www.ghrsst-pp.org.
9. Smith, N.R., and C. Koblinsky. 2001. The ocean observing system for the 21st Century: A consensus statement. Pp. 1–25 in Observing the Oceans in the 21st Century. C. Koblinsky and N.R. Smith, eds, GODAE Project Office, Bureau of Meteorology, Melbourne, Australia.

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