The Trump administration has halted the participation of U.S. scientists in key U.N. climate change assessments, two sources familiar with the situation told Reuters, part of its broader withdrawal from climate change mitigation efforts and multilateral cooperation. [emphasis, links added]
The stop-work order affects staff members of the U.S. Global Change Research Program and the National Oceanic and Atmospheric Administration (NOAA) who engage with a key working group of the Intergovernmental Panel on Climate Change (IPCC).
It means the U.S. will not attend a major IPCC plenary meeting in Hangzhou, China, next week, to plan the seventh global climate assessment, said one of the sources.
The White House declined to comment and the State Department did not respond to a request for comment.
“The power of the IPCC is that governments, businesses, and global institutions can operate with shared conclusions. The U.S. being completely removed from that process is concerning,” said Delta Merner of the Union of Concerned Scientists.
While American scientists will be in attendance and continue to work on climate research used by the IPCC, the absence of the U.S. in the IPCC process will be felt.
The Hangzhou meeting from 24-28 February is expected to make a few key decisions that will shape the outcomes of the next climate assessment, including the role of carbon removal and capture technology.
China’s foreign ministry said on Thursday it was unaware of the withdrawal of U.S. participants.
The U.S. is a co-chair along with Malaysia of a working group on climate mitigation, or ways to reduce greenhouse gas emissions.
The U.S. had also pledged around $1.5 million to support the IPCC, though that money had not yet been appropriated by Congress.
Withdrawal of the U.S. from the IPCC does not come as a surprise to climate scientists, given President Donald Trump’s moves to withdraw the U.S. again from the Paris climate agreement, claw back U.S. global climate finance, and sever international partnerships on climate.
“This would align with Trump’s signals around climate action,” said Kathryn Bowen, a professor at Melbourne University and a lead author on the IPCC’s sixth assessment report published last year.
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