I’m tired already and just got here. I flew in from Toronto yesterday getting up about 5 am Toronto time, arrived at AGU about 2 pm San Fran time and caught about helf the day. I mainly go to the Paleo sessions, where, among other things, I’m scouting for new high-resolution series covering the past millennium. This year there are quite a few speleothems. Paleo matters today were mostly on the monsoon.
Julia Cole has a new speleothem at Cave of the Bells in the U.S. monsoon rgion, which she contasted to the following proxies: Chahancanab Hodell), Cariaco Ti (Cariaco alreday discussed here), a new Galapagos % sand proxy (Conroy, sub QSR), Soreq Cave in Israel, Dongge Cave in China, Qunf Cave in Oman. She attributed changes to N-S movements of ITCZ and also argued/noted the idea hat the zonal gradient across the Pacific had changed during the Holocene.
Biondi talked about detailed climate at a tropical treeline site at Nevado de Colima in Mexico. Spring temperatures were warmer than summer temperatures as the arrival of the monsoon moderated temperatures (and increased moisture),
Shanahan had a high-reslutino lake sediment record fom ake Bosumtivi in Ghana, which was said to be a proxy for the monsoon. His comparanda were deMonocal 658 SST(Loehle used this), Dongge Cave, Qunf Cave.
Poster 1416 showed that the unusual dO18 in a 1980 storm at Mt Wrangell could be traced to a different water source – Siberia instead of the PAcific.
Poster 1420 – a Korean speleothem (Yongcheon Cave – K Woo et al ) was decadal resolution and showed elevated modern monsoon levels with highish “MWP” levels in the 14th century.
Core MD02-2494 was sampled at 1.5 cm but was only 15th cenury and earlier due to top core loss.
Poster 1419 (Isono, Yamamoto…) showed a graient in the N Pacific in the mid-Holocene (MD01-2421).
Buckley reported that they had developed tree ring chronologies from high conifers in SE Asia (where an annual signal could be recovered due to altitude.)
I have a few more notes but I’m off this instant to see a session on aerosols, Schwartz is speaking at 8.05.