Hi Watched a video with Doug (cc) today.
https://www.youtube.com/live/_JBLMsXNmhs?si=3qoDl1RNLS4zb_zc A personal highlight was listening to his concerns about Make Sunsets (bcc). If I'm not mistaken, the logic is as follows 1) MS release lifting gas alongside S-compounds 2) MS plan to use H2 3) H2 is an indirect GHG, GWP100 is ~11 https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1067144/atmospheric-implications-of-increased-hydrogen-use.pdf https://www.nature.com/articles/s43247-023-00857-8 4) stratospheric H2 decomposes to H2O, a GHG I'm unclear on the following A) does the indirect GWP100 of H2 increase if it's directly released into the stratosphere? Common sense suggests so, but I can't see figures anywhere B) if stratospheric wetting is a problem, why isn't jet exhaust a problem? It's very wet - C8H18 + 12 1/2O2 => 8CO2 + 9H2O. So in thin air ~1/3 of the engine oxygen intake ends up as water. This applies to both commercial and geoengineering flights. C) is the above effect enough to net off the SAI? It doesn't seem so, SO2 is a very strong negative forcing agent in the stratosphere I'd welcome comments Andrew Lockley -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to geoengineering+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/geoengineering/CAJ3C-07G31fxurF78VAhdz-cG6hGV5Nkd1pdQF4HudKV8hOpVQ%40mail.gmail.com.
