Tag Archives: lawdome

An Unpublished Law Dome Series

Oxygen isotope series are the backbone of deep-time paleoclimate. The canonical 800,000 year comparison of CO2 and temperature uses O18 values from Vostok, Antarctica to estimate temperature. In deep time, O18 values are a real success story: they clearly show changes from the LGM to the Holocene that cohere with glacial moraines. On its face, […]

Law Dome in Mann et al 2008

As mentioned yesterday, the Law Dome series has been used from time to time in IPCC multiproxy studies, with the most remarkable use occurring, needless to say, in Mann et al 2008. As noted yesterday, despite Law Dome being very high resolution (indeed, as far as I know, the highest resolution available ice core) and […]

Gergis’ Two Medieval Proxies

IPCC AR5 (First Draft) cited Gergis et al as follows: New paleo records from Australasia provide evidence of MCA warming around 1250–1330 CE, [my bold] somewhat later than maximum medieval warmth described from many Northern Hemisphere regions (Gergis et al., submitted). Following peak medieval warmth in the early 1300s, a cooling trend reaching a temperature […]

IPCC and the Law Dome Graphic

Re-reading Climategate and AR4 Review Comments, I noticed an interesting discussion about handling the Law Dome O18 record – a series used in Mann and Jones (2003) and Jones and Mann (2004) with a very elevated MWP.

MWP Non-Dendro Proxies #2

OK, I’m starting to get the feel of the new proxy network and have some ideas of what the new Mannomatic is doing. The manouevres have a lot of similarities to the moves in MBH98 and I think that a few main components can be singled out: 1. Once again, as in MBH98-99, the “proxies”, […]

Some Ice Cores in NAS – Antarctic

Now that I’ve caught my breath a little, just for fun, I’m parsing through sections of the NAS report on areas not directly involving the MM-MBH battle. In the press conference, I recall Cuffey placing a lot of emphasis on the "regional" MWP, and that it wasn’t in the Antarctic ice core data (although it […]

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