Hi Reddit! We are a group of scientists whose work entails weighing the world's climate pledges. Our aim is to not only understand whether the country-by-country climate commitments are sufficient to meet the world's warming goals, but to also assess the potential pathways we can take to realize those goals. By using one of the key models utilized by the Intergovernmental Panel on Climate Change, we seek to understand what socioeconomic consequences could flow from the pathways on offer. With COP28 and the Global Stocktake starting in just two days, we wanted to answer any questions you have on the meeting and the global project of slowing climate change.

We hail mostly from the Joint Global Change Research Institute (JGCRI), a partnership institute between the Pacific Northwest National Laboratory (PNNL) and the University of Maryland (UMD). We are Gokul Iyer (PNNL), Haewon McJeon (KAIST Graduate School of Green Growth), Yang Ou (Peking University), and Yiyun 'Ryna' Cui (UMD).

In past work, we've shown that the world's climate pledges may be enough to avoid the worst of global warming. Yet we are still not on track for a 1.5-degree world. Our most recent work points to three major efforts that could get us back there. How much carbon dioxide must we remove from Earth's atmosphere to meet our goals, and by when? What about greenhouse gasses other than carbon dioxide? Will planting trees really help? Should I stop eating beef? All fair questions, which we're happy to answer from 1-3pm PST (4-6 PM EST, 21:00 UTC) today!

Username: /u/PNNL