Collections: global temperature datasets

Tim Osborn

Land temperatures

CRUTEM.  Gridded near-surface air temperatures over land, put together mostly by CRU, led by Phil Jones, with contributions from UK Met Office Hadley Centre.  No spatial interpolation to make them complete, though earlier versions had a coarser grid and some infilling between neighbouring boxes so coverage appeared more complete than it actually was.  Versions with variance adjusted to compensate for time-varying numbers of stations were introduced around 2001 (i.e. partway through the CRUTEM1 era through to present).

GISTEMP.  GISS Surface Temperature Analysis, put together by Goddard Institute for Space Studies, led by Jim Hansen.

NOAA/NCDC LST.  NOAA/NCDC produce global Land Surface Temperatures (LST) from GHCN station data, using the climate anomaly method (earlier versions used a first-difference type method to make use of stations without data during a reference period, but this approach was replaced by CAM around 2007-ish).  Smith, Reynolds and others have led this work.

BEST.  Berkeley Earth Surface Temperature Study, led by Richard Muller and Robert Rohde.  Assembled station database from multiple other databases.  Applied a statistical model that allows short or discontinuous records to be used as well as longer, continuous records; this also allows inhomogenous records to be split into multiple segments, with adjustments implicitly estimated and applied; to achieve this, a statistical model describing the spatial variation of average absolute temperature is assumed.

Ocean temperatures

HadSST.  Gridded SST data, put together by Met Office.  No spatial interpolation to make them complete.

HadISST.  Gridded SST and sea-ice coverage data, put together by Met Office.  With spatial interpolation to make them complete, even where no observations are available.

ERSST.  Gridded SST data, put together by NOAA using ICOADS.  Spatially complete via an EOF-type interpolation.

  • ERSST.v3b
  • ERSST.v3
    • Replaced ERSST.v2 with modified statistical method that reduces the damping of low-frequency changes (especially before 1930) and includes satellite data (the latter induces a cold bias).
  • ERSST.v2
    • This was the operational version from 2004 to 2008
  • ERSST.v1
    • This was the operational version from 2003 to 2004

Global Land + Ocean temperatures

HadCRUT.  Combination of CRUTEM near-surface air temperatures over land with HadSST sea surface temperatures.  A joint venture by CRU and UK Met Office Hadley Centre.

GISTEMP.  GISS Surface Temperature Analysis, put together by Goddard Institute for Space Studies, led by Jim Hansen.  Combines GISTEMP dTs over land with SST from HadISST1 and Reynold’s OISST.

NOAA/NCDC MLOST.  NOAA/NCDC Merged Land-Ocean Surface Temperature Analysis (MLOST) combines NOAA/NCDC LST over land with SSTs from ERSST.  Led by Smith, Reynolds, Peterson and Lawrimore.

Atmospheric temperatures

Hadley Centre radiosonde-based atmospheric temperatures.

Advertisements
%d bloggers like this: