Values of key climate indicators
Indicator |
Time period |
Value |
Ranking |
Global mean surface-temperature anomaly (1981–2010 baseline) |
2017, |
+0.46°C |
Second-highest on record |
Global ocean heat content change, 0–700 metre layer |
2017, |
1.581 x 1023 J |
Highest on record |
Global mean CO2 surface mole fraction |
2016, |
403.3 parts per million |
Highest on record |
Global mean sea-level change since 1993 |
2017, December |
8.0 cm |
Highest on record |
Arctic sea-ice extent summer minimum |
2017, September |
4.64 million km2 |
Eighth-lowest on record |
Source: WMO Statement on the State of the Global Climate in 2017