Real Climate

NOVEMBER 11, 2023

A friend asked me if a discussion paper published on Statistics Norway’s website, ‘ To what extent are temperature levels changing due to greenhouse gas emissions? ’, was purposely timed for the next climate summit ( COP28 ). I don’t know the answer to his question. But this discussion paper is problematic for sure.

Sea Level 293

Sea Level Greenhouse Climate Change Atmosphere 293

Real Climate

AUGUST 12, 2021

And since the first IPCC estimates published in 2013, we have learned a lot and have gotten much better at estimating remaining carbon budgets. IPCC reported carbon budgets for the first time in 2013. in 2018, but they represent a significant update since AR5 in 2013. In the 2018 IPCC Special Report on Global Warming of 1.5°C

2018 329

2018 Climate Change 2013 2014 329

Physics World

OCTOBER 6, 2021

As air sunk through the atmosphere, it got squeezed and heated. This figure will increase to nearly half of the world’s population by the end of the century, the authors say, even with drastic reductions in greenhouse-gas emissions. Taken together, however, clouds in today’s atmosphere have an overall net cooling effect.

Cooling 133

Cooling Atmosphere Climate Change Greenhouse 133

Real Climate

AUGUST 9, 2021

The radiative forcing bar chart has gone full circle: Almost every IPCC report has a version of the radiative bar chart showing the contributions over the historical period of all the different forcings (greenhouse gases, aerosols, solar, etc.). Oddly enough this is most reminiscent of the very first bar chart that appeared in Hansen et al.

Sea Level 341

Sea Level 2012 Radiation Ocean 341