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-now anomalies: HadCRUT4 median,
	1880-now anomalies: NOAA v4.0.1
	1880-now anomalies: GISS 250km, 1200km
Precipitation	1891-2016: GPCC V2018 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 V2018 + 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
Global temperature	HadCRUT4 Global average temperature (ocean only), northern hemisphere (ocean only), southern hemisphere (ocean only), tropics (ocean only) (1850-now Hadley Centre)
	HadCRUT4 Global average temperature ensemble, northern hemisphere ensemble, southern hemisphere ensemble, tropics ensemble (1850-now Hadley Centre)
	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° 1993-2018 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 ocean 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 mass changes (2002-2017, NASA/JPL)