Real Climate

NOVEMBER 29, 2023

It is 33 years now since the IPCC in its first report in 1990 concluded that it is “certain” that greenhouse gas emissions from human activities “will enhance the greenhouse effect, resulting on average in an additional warming of the Earth’s surface.” It’s not hard to understand.

Greenhouse 301

Greenhouse Radiation Cooling Carbon Dioxide 301

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

OCTOBER 12, 2021

Last week, the Nobel physics prize was (half) awarded to Suki Manabe and Klaus Hasselmann for their work on climate prediction and the detection and attribution of climate change. This came as quite a surprise to the climate community – though it was welcomed warmly. But let’s go back to the beginning.

Atmosphere 317

Atmosphere Ocean Greenhouse Climate Change 317

Frontiers

AUGUST 7, 2023

Writing as part of Frontiers’ guest editorials series, the study’s lead author – Prof Martin Siegert, deputy vice chancellor of the University of Exeter (Cornwall) – discusses how without there being a rapid shift to net-zero greenhouse gas emissions by 2050, the Antarctic environment will experience ever more drastic changes.

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Ocean Fossil Fuels Radiation Environmental Science 98

Physics World

OCTOBER 6, 2021

Long term, climate change is a greater threat than the COVID-19 pandemic. Without human-induced climate change, that heat would be at least 150 times rarer. On balance, clouds nearer the stratosphere warm us, whereas low-lying clouds tend to cool us because their greenhouse effect is smaller.

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Cooling Atmosphere Climate Change Greenhouse 133

HumanNature

APRIL 10, 2023

But this simplified pathway misses a key step in cloud formation–and one that could help us combat climate change. Altering cloud properties influences Earth’s climate On sunny days, it’s clear that clouds leave shadows on the landscape. Without these changes to clouds, the Earth would already be warmer.

Climate Change 52

Climate Change Paris Agreement Atmosphere Cooling 52

Real Climate

AUGUST 9, 2021

As climate scientists we tend to look at the IPCC reports a little differently than the general public might. Here are a few things that mark this report out from previous versions that relate to issues we’ve discussed here before: Extreme events are increasingly connected to climate (duh!) 1981) which can be seen here.

Sea Level 341

Sea Level 2012 Radiation Ocean 341