WMO-assessed data sets

Observations
This page provides links to the Climate Explorer pages of key climate variables that have been assessed under supervision of the WMO. For more information of the assessment process and a list of the assessed datasets, see the WMO web pge.

Temperature and Precipitation (ECVs) and Climate Indices: fields
Temperature	1850-2018 anomalies: HadCRUT5 median, 1850-now HadCRUT4 median
	1880-now anomalies: NOAA v5
	1880-now anomalies: GISS 250km, 1200km
Precipitation	1891-2016: GPCC v2020 analysis (land) 2.5°, 1.0°, 0.5°,0.25°, only observations: 2.5°, 1.0°, 0.5°,0.25°, number of gauges 2.5°, 1.0°, 0.5°, 0.25°
	1986-now: 1° GPCC monitoring product + first guess (land); only observations, number of gauges
	1900-now: home-merged 1° GPCC v2020 + monitoring product V6 + first guess (land); 1°, 2.5°, only observations: 1°, 2.5°
Extreme indices	HadEX2 1901-2010 2.5° monthly: TXx, TXn, TX10p, TX90p, annual: TXx, TXn, TX10p, TX90p
	HadEX2 1901-2010 2.5° monthly: TNx, TNn, TN10p, TN90p, annual: TNx, TNn, TN10p, TN90p
	HadEX2 1901-2010 2.5° monthly: Rx1day, Rx5day, annual: Rx1day, Rx5day, R95p, R99p
Temperature and Precipitation (ECVs) and Climate Indices: time series
	NOAA/NCEI Global average temperature (land, ocean), (1880-now)
	NASA/GISS Ts+dSST Land-Ocean average temperature (ocean only), northern hemisphere, southern hemisphere (1880-now)
Hydrology and Marine
Run-off time series	GRDC does not allow their data here
Ocean surface	1800-now: 2° ICOADS v2.5 SST, number of obs
	1800-now: 2° ICOADS v2.5 Tair, number of obs
	1800-now: 2° ICOADS v2.5 SLP (sea), number of obs
	1800-now: 2° ICOADS v2.5 cloud cover (sea), number of obs
Wind	u, v 1800-now: 2° ICOADS v2.5 (sea)
Wind stress	taux, tauy 1800-1997: ICOADS v2.5 pseudostress
Wind speed	1800-1997: ICOADS v2.5 wind speed, wind speed cubed
Sea surface height	Copernicus 1/4° 1993-now sea-level anomalies, dynamic topography, u geostrophic current, v geostrophic current
	ESA CCI 1/4° 1993-2015
Sea level stations	GLOSS sea level stations with a name containing , or stations near °N, °E, or all stations in the region °N - °N, °E - °E with at least years of data
Subsurface ocean	The raw WOD13 data are incompatible with the CXlimate Explorer. Derived time series are below.
Ocean heat content	0-700m: Global upper ocean (NH, SH), Atlantic (N, S), Indian (N, S), Pacific (N, S) (1955-now, NODC) 0-2000m: Global upper ocean (NH, SH), Atlantic (N, S), Indian (N, S), Pacific (N, S) (2005-now, NODC)
Sea Ice & Ice Sheets & Glacier ECVs: fields
Sea ice concentration	1978-now: NSIDC Arctic, Antarctic (home-interpolated from v01, pre, nrt)
Gravity	2002-now: GRACE land all liquid water equivalent
Sea Ice & Ice Sheets & Glacier ECVs: indices
Sea ice	NH area, NH extent, SH area, SH extent (1978-now, NSIDC)
Land ice	GRACE Greenland, Antarctica, ocean mass changes (2002-now, NASA/JPL)