The State of Our Climate
The State of Our Climate System
The site for vital climate data in monthly images
ACCELERATING PLANETARY EMERGENCY SIGNS
Mean atmospheric
greenhouse gases
July 2020
CO2 414.38 ppm
CH4 1880 ppb
N2O 332 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
Mar 2016 Nature The terrestrial biosphere as a net source of greenhouse gases
December 2020
CO2
CH4
N2O
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
NASA
2017
Bulletin of the
American Meteorology
Society. BAMS Aug 2020
State 2019 Global Climate
D.
March 2019
CO2 Eq. 2019: 500 ppm
Abrupt Global Heating, Feb.2020,pdf
2019 year of record surface heating (Copernicus)
August 2020 PDF All climate change indicators, getting worse faster
4 Aug 2020 Cumulative CO2 emissions tracking the very worst case scenario
BAMS Aug 2020
NOAA Sept 2020 Record
N. hemisphere summer heat
