In my closing comment on the above post, I mused about the possibility of a connection between mag levels and glacier existence, but did not have any information on the connection at that time.

If you look at the graphic posted up here (and a nearly identical one for another tarn in the original article) and applied the methodologies of Polissar et al, one would conclude that glaciers did not exist for most of the history of the tarn and were merely episodic.

The other thing that I wonder about here is the lack of any LIA radiocarbon-dated materials. We know that glaciers grew in the LIA. So there should be evidence of high-mag sediments near the top of the core or at the top of the core from the LIA? Where is it? I wonder whether there’s a reservoir effect in the radiocarbon and whether the high-mag sediments at the top of the core actually come from the LIA? If not, why aren’t there any LIA sediments here?

Indeed. In some tropical locations besides this part of Africa, essentially the ONLY source of precipitation is monsoons. Once again, the Hockey Team attempt to change a precipitation proxy into a temperature proxy. Even on Mann’s own homepage at Penn he’s got a link to an Article on the UVA website about the seeming correlation between tree ring widths and preciption at Monticello. Harumph!

on the equator (and 20 km south of it), however, the sun is right above your head in march and september, so december and june are both cooler season.

winter does not exist in the tropics.

20 km south of the Equator?

Academic?

I suspect not.

I have enough practical experience from flying in helicopters and etc that increasing altitude results in extreme coldness.

Of course one must keep in mind that opponents of climate scepticism refuse to give up their, ass drawn, trailers despite that this ancient mode of transportation has little relevance to the concentration of biological oxidation of carbon,

Steve did not call me on anything. I’m aware of the monsoon effect (read other post). Just trying to think through. I think he’s clarified his point, now. It has nothing to do with “summer”, per se. It has to do with precip.