For ERA-interim, the prescribed lower boundary conditions are taken from different sources depending on the dates of the reanalyses:
- January 1989–June 2001: NCEP 2D-Var sea surface temperature (NCEP 2DVar)
- July 2001–December 2001: NOAA Optimum Interpolation Sea Surface Temperature v2 (NCEP OISST v2)
- January 2002–January 2009: NCEP Real-Time Global sea surface temperature
(NCEP RTG)
- From February 2009 onward: Met Office Operational Sea Surface Temperature and Sea-Ice Analysis (OSTIA) (see: http://ghrsst-pp.metoffice.com/pages/latest_analysis/docs/Stark_et_al_OSTIA_description_Oceans07.pdf)
For MERRA, SSTs are derived from the weekly 1 degree "Reynolds" sea surface temperature product (see: Reynolds, R. W., N. A. Rayner, T. M. Smith, D. C. Stokes, and W. Wang, 2002: An improved in situ and satellite SST analysis for climate. J. Climate, 15, 1609–1625.)
For ERA-interim, the prescribed lower boundary conditions are taken from different sources depending on the dates of the reanalyses:
- January 1989–June 2001: NCEP 2D-Var sea surface temperature (NCEP 2DVar)
- July 2001–December 2001: NOAA Optimum Interpolation Sea Surface Temperature v2 (NCEP OISST v2)
- January 2002–January 2009: NCEP Real-Time Global sea surface temperature
(NCEP RTG)
- From February 2009 onward: Met Office Operational Sea Surface Temperature and Sea-Ice Analysis (OSTIA) (see: http://ghrsst-pp.metoffice.com/pages/latest_analysis/docs/Stark_et_al_OSTIA_description_Oceans07.pdf)
For MERRA, SSTs are derived from the weekly 1 degree "Reynolds" sea surface temperature product (see: Reynolds, R. W., N. A. Rayner, T. M. Smith, D. C. Stokes, and W. Wang, 2002: An improved in situ and satellite SST analysis for climate. J. Climate, 15, 1609–1625.)