IPCC Seventh Assessment Report Drafting Meeting

Scientists from over 190 countries are gathering in Hangzhou, China, to begin drafting the Intergovernmental Panel on Climate Change’s (IPCC) Seventh Assessment Report. However, notable absentees include experts from the US, such as NASA chief scientist Katherine Calvin, due to a veto by the Trump administration.

Impact of US Withdrawal

• The report is expected in 2029, but interim findings could precede the 2028 UNFCCC Global Climate Stocktake.
• The absence of US experts might affect the IPCC’s input into this stocktake.
• Uncertainty looms over US participation in the IPCC, potentially leading to financial withdrawal, reminiscent of the lack of support during Trump's first presidency.
• The Biden administration had restored funding, contributing nearly a quarter of the IPCC's budget.

Effects on IPCC Operations

• Restrictions are now placed on the technical team previously assembled by Trump.
• NASA and NOAA's contributions are vital, and their absence could impact the quality of the assessment, especially on global warming mitigation.

Continuity of IPCC Work

Despite previous disengagement by the US under Trump, the IPCC managed to produce the Sixth Assessment Report, with significant support from other nations and institutions.

The ongoing meeting in Hangzhou may establish new procedures to address the challenges posed by the US's non-participation.