http://www.grist.org/article/series/skeptics/ see 3a
Larry Seltzer wrote: > > And what happened during the Medieval warming period, when Greenland > was green, vineyards were grown in England and Europe was generally warm? > > > > Climate warmists claim this was a localized phenomenon. I suspect > records from other parts of the world aren’t as good and using proxies > is difficult. > > > > Larry Seltzer > Contributing Editor, PC Magazine > > [email protected] > > http://blogs.pcmag.com/securitywatch/ > > > > *From:* [email protected] > [mailto:[email protected]] *On Behalf Of *Martin Tomasek > *Sent:* Tuesday, December 01, 2009 6:47 AM > *To:* [email protected] > *Cc:* [email protected] > *Subject:* Re: [funsec] Actual Climate Change Thread > > > > [email protected] <mailto:[email protected]> wrote: > > On Sat, 28 Nov 2009 10:49:32 +0100, Martin Tomasek said: > > > > So you can measure global area represented by different climates, but > > averaging temperature over the areas (or globally) is quackery. Average > > global temperature has no meaning. > > > > > So during the last ice age, what did the global average temperature do? > > > > This is difficult question. We know of ice ages by proxies, such as > traces of big moving blocks on rock surfaces, ice cores etc. These > proxies are mostly placed in arctic area or high in the mountains (so > you have no reliable data from Africa). BTW, this is one sources of > difficulties in dating of egyptian Sphinx, which appears to be about > 8000 years older than the age shown by radionuclid dating and noone > knows what to do with that. > > We know that weather is chaotic system, which we are unable to predict > for a long time and which has unevenly (and one should say > chaotically) distributed temperature over space. So, average > temperature depends on methodology of measurement. It depends on which > places you choose to include in global average and on weights of the > places (you are calculating weighted average). > > I believe that in most cases of ice age global temperature calculation > you will get temperature lower than today. > > I tried to find more information on proxies in and near Africa, I'll > read this book, seems promising: > http://www.nap.edu/catalog.php?record_id=11676 but also a little > disappointing - they use graphs produced by Michael Mann, infamous by > his invention of 'hockey stick chart'. And they also use tree ring > data (which is not reliable temperature proxy). > > Speaking of Michael Mann, here is funny video reacting to leaked > emails: http://www.youtube.com/watch?v=nEiLgbBGKVk (They discarded > temperature data, obtained by tree ring proxies, from IPCC report. It > showed temperature decline). > > -- > Martin Tomasek > ------------------------------------------------------------------------ > > _______________________________________________ > Fun and Misc security discussion for OT posts. > https://linuxbox.org/cgi-bin/mailman/listinfo/funsec > Note: funsec is a public and open mailing list. _______________________________________________ Fun and Misc security discussion for OT posts. https://linuxbox.org/cgi-bin/mailman/listinfo/funsec Note: funsec is a public and open mailing list.
