Comments on: The MWP and LIA in Kenya and South Africa

By: The Trouet Ocean Proxies « Climate Audit

The Trouet Ocean Proxies « Climate Audit — Sat, 11 Sep 2010 15:34:24 +0000

[...] sediment series, mentioned in passing in connection with Mann et al 2008 here , also here. The data set was also used in the discussion of a warm Warm Pool MWP by Newton et al 2006 (See CA [...]

By: Henrik

Henrik — Wed, 04 Oct 2006 12:11:05 +0000

Antartic is not the place to start comparing temperatures between current warm period and medieval warm period. As Nasa satellites tell us, Antartic has had cooling trend for a long time. I’m not surprised if there is correlation between cooling Antartic and warming NH especially Europe and N.America.

It could be possible and “global” cooling or warming happens or have happened in past mostly only in NH. There is quite strong “concensus” with european paleoclimatology that top MWP temperatures were higher than current peak temperatures. Treelines (oak, pine, spruce ) in Scandinavia, Alps and icecores are the best proxies. It tells MWP (about 1000-1200 AD) temperatures were about 1 degree higher than late 1900′s. I’m not impressed of any isotope proxies, cause these are problems with timings and so on. They have some risks.

By: bender

bender — Mon, 07 Aug 2006 14:39:56 +0000

Please do!! Thanks KevinUK!

By: KevinUK

KevinUK — Mon, 07 Aug 2006 14:36:27 +0000

#19 and 20

John A, Is this side effect of long URLs at the start of a post down to WordPress or is the index rendering code yours?

I presume its the former, if the latter then I’d be happy to help solve the prolem.

KevinUK

By: fFreddy

fFreddy — Mon, 07 Aug 2006 12:27:53 +0000

JillB, this arises when people put URLs early in their posts so that they appear in the recent posts section at the top right. The problem only applies to MS Internet Explorer users, because of the non-standard way MS tries to do things. The best solution is to use Firefox, which is much better for a whole host of reasons.

By: JillB

JillB — Mon, 07 Aug 2006 12:10:57 +0000

A site index has turned up on the left hand site of the page,I haven’t seen it before in the previous 6 or so weeks when i have dipped in. It obscures most of the text even though i have put the font to smallest. How do i get rid of this index so i can read the blogging.

By: TCO

TCO — Sun, 18 Sep 2005 05:48:57 +0000

I’m not sure how useful it is to show this kind of study. It begs the question of “is this proxy representative of a majority or minority”? Also, its not being exposed to the same full court press of looking for confounding factors as the bristlecones, etc. are. There’s also a comment by JohnA about looking at studies all over the world to get some idea if MWP occured or not (in essence an overarching study). However, that does not seem to have been done. Instead snippets that support one position are brought forward.

Then there is the blablabla about heat islands jacking the thread…

By: Louis Hissink

Louis Hissink — Sun, 06 Mar 2005 04:40:23 +0000

Hans,

is not the layering principally one of indiuvidual snow storms, of which many might occur in one year? I recall reading elsewhere (references are 3000 km away in Sydney which I will get my hands on over Easter) relating to this very issue. I have to leave this particular topic until I refresh my memory on the particulars – but I do recall the debate was pretty acrimonious, neither side giving in. In the meantime I might have another obscure reference to it somewhere in Perth, which I’ll search.

By: Hans Erren

Hans Erren — Fri, 04 Mar 2005 14:39:30 +0000

Louis,

IMHO using lithostatigraphy in a seasonally determined sedimentation regime is justified. Please show us the caveats of this assumption.

By: Louis Hissink

Louis Hissink — Fri, 04 Mar 2005 13:00:55 +0000

Andre,

That is how it was calculated?.

Visual classification of ice core classes these layers into events, more probably related to depositional ones, rather than chronological.

Tends to confirm my initial interpretation that the measurements reflect sampling rather anything else.

Hmmmmmm.