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 339

Sea Level Greenhouse Climate Change Atmosphere 339

Real Climate

AUGUST 9, 2021

On their own, our greenhouse gas emissions would have caused a much higher warming, were it not for the masking effect of aerosol pollution. That’s also in line with earlier research (Henley and King, 2017) on the high RCP8.5 2 of the Paris Agreement as “pursuing efforts to limit the temperature increase to 1.5ºC”.

Paris Agreement 363

Paris Agreement 2030 2018 2015 363

HumanNature

APRIL 10, 2023

Scientists used satellite data of ship tracks and climate models to estimate that, globally, changes in low-level clouds due to human-caused (anthropogenic) pollution has a cooling effect that is equivalent to about 25-33% of the anthropogenic warming caused by greenhouse gases , or approximately 1 Watt of energy per square meter.

Climate Change 52

Climate Change Paris Agreement Atmosphere Cooling 52