ourclimate

The State of Our Climate

The site for up to date vital climate change indicators in images

ACCELERATING PLANETARY EMERGENCY SIGNS

Mean atmospheric
greenhouse gases
NOAA Mauna Loa
Nov 2021

CO2 417 ppm
CH4 1889 ppb
N2O 334.5 ppb

Already committed future warming and climate change

The radiative heat forcing of today's atmospheric GHGs commits the world to a global warming of 1.5C by 2030-2040 (IPCC AR5 WG1 Figure 11.6) and full equilibrium warming over 2.0C.

'The current RF(radiative forcing) from GHGs maintained indefinitely (i.e., the commitment from constant greenhouse gas concentrations) would correspond to approximately 2°C warming.'
(IPCC AR5 WG1 12.5.4.2)

Site maintained by Peter Carter

Mar 2016 Nature The terrestrial biosphere as a net source of greenhouse gases

CLIMATE SYSTEM EMERGENCY

> All GHG emissions increasing fast

> CO2 emissions accelerating
> All atmospheric GHGs increasing fast
> Atmospheric CO2 accelerating
> Global warming accelerating trend

> Ocean heat accelerating
> Ocean acidification accelerating
> Ocean de-oxygenation accelerating

Rate of warming headed for
10X faster than
the past 65 M years

Accelerating atmospheric CO2 at a 3-5 million year high, has been increasing at a rate over "the past 70 years of nearly 100 times larger than that at the end of the last ice age ... such abrupt changes in the atmospheric levels of CO2 have never before been seen".
WMO Oct 2017

2020 State of Climate
Aug. 2021 BAMS Bulletin American Met Society.
Most comprehensive

WMO ACCELERATING IMPACTS

High lights

March 2020 WMO State of Climate Pivotal year

NOAA l atmospheric
greenhouse gas trends
Accelerating

Expanded monthly indicator list by J. Hansen,
M. Sato (Columbia Earth0