ourclimate

The State of Our Climate

The site for vital climate data in monthly images

ACCELERATING PLANETARY EMERGENCY SIGNS

Mean atmospheric
greenhouse gases
NOAA Mauna Loa
April 2021

CO2 416.14 ppm
CH4 1882 ppb
N2O 334.5 ppb

Already committed future warming
and climate change

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

Atmospheric CO2 is att a 23 million year high and rising at an unprecedented rate

The 1992 UN climate change convention requires safe levels of atmospheric greenhouse gases

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

Carbon clock

EARTH GHG EMERGENCY

> All GHG emissions increasing fast

> CO2 emissions accelerating
> All atmospheric GHGs increasing fast
> Accelerating atmospheric CO2
> Accelerating global (& recent increase) warming

> Accelerating ocean heat
> Accelerating ocean acidification
> Accelerating ocean de-oxygenation

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

CO2

Feb 2020 WMO State of the Climate in 2019

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

Bulletin of the
American Meteorology
Society. BAMS Aug 2020
State 2019 Global Climate

WMO ACCELERATING IMPACTS

High lights

March 2020 WMO State of Climate Pivotal year