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Post by kiwistonewall on Jun 1, 2009 17:23:23 GMT
Source: Philip Henwood: "Pre-historic East Cornwall and Linkinhorne"1
Quote:
The Period between 10,000BC and 4,000 BC has been designated by archaeologists as the Mesolithic or Middle Stone Age. It was an age when there was a marked improvement in temperature, which became several degrees higher than it is as the present day."
This is the age of all the barrows and stone circles, henges etc across Southwestern England.
My own take on this is that the Druids#
lead by the great Druid Leader, Alwyn Goredd
clearly saw that rising CO2 was causing global warming. The research grants from the local petty kingdoms were used to create the stone observatories, before the economy collapsed since everyone was too busy building stone circles to do any real work.
......... ;D
Needless to say, the climate later cooled.
#[with their advanced science, now lost at Westerness - when that land sunk (now the Scilly Islands)]
1 You can buy this book from the Church Inn, Linkinhorne. or write to Philip Henwood, Churchtown, Linkinhorne,Callington, Cornwall, PL17 7LY
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Post by icefisher on Jun 1, 2009 17:54:27 GMT
This is the age of all the barrows and stone circles, henges etc across Southwestern England. My own take on this is that the Druids # lead by the great Druid Leader, Alwyn Goredd clearly saw that rising CO2 was causing global warming. The research grants from the local petty kingdoms were used to create the stone observatories, before the economy collapsed since everyone was too busy building stone circles to do any real work. Hilarious. Maybe those stone circles were painted white to reflect sunlight into the central firepit to reduce CO2 emissions. Must've worked. Any information on whether they also prohibited bear rugs and fox coats? |
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sol
New Member
Posts: 13
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Post by sol on Jun 1, 2009 18:27:09 GMT
Source: Philip Henwood: "Pre-historic East Cornwall and Linkinhorne" 1Quote: The Period between 10,000BC and 4,000 BC has been designated by archaeologists as the Mesolithic or Middle Stone Age. It was an age when there was a marked improvement in temperature, which became several degrees higher than it is as the present day."This is the age of all the barrows and stone circles, henges etc across Southwestern England. My own take on this is that the Druids # lead by the great Druid Leader, Alwyn Goredd clearly saw that rising CO2 was causing global warming. The research grants from the local petty kingdoms were used to create the stone observatories, before the economy collapsed since everyone was too busy building stone circles to do any real work. ......... ;D Needless to say, the climate later cooled. #[with their advanced science, now lost at Westerness - when that land sunk (now the Scilly Islands)] 1 You can buy this book from the Church Inn, Linkinhorne. or write to Philip Henwood, Churchtown, Linkinhorne,Callington, Cornwall, PL17 7LY Oh dear. This reminded me greatly just now of "A Canticle for Leibowitz" by Walter M. Miller, Jr. NOW I'm scared. ;D |
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Post by kiwistonewall on Jun 3, 2009 5:44:28 GMT
There was a serious point, that the Earth warmed up after the last ice age, but has cooled since, and is currently cooler than the immediate post ice age period. Hence, the current warming (if in fact, it is still warming) isn't likely to be other than a natural cycle.
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Post by steve on Jun 3, 2009 13:17:09 GMT
The northern hemisphere received more direct summer sunshine 9000 years ago due to changes in the earth's axis. Maybe this was why Cornwall (which is in the mid-northern latitudes of the northern hemisphere) was warmer in summer. What does the book say about winter? Some pollen reconstructions say it was colder in winter 9000 years ago than now in Europe. Perhaps Cornwall was protected by its proximity to the oceans? Perhaps Cornwall was, in fact, a winter retreat!? What's Cornish for Costa Del Sol? The temperature of Europe during the Holocene reconstructed from pollen data BAS Davis, S Brewer, AC Stevenson, J Guiot - Quaternary Science Reviews, 2003 www.gi.ee/~veski/10616.pdf |
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Post by woodstove on Jun 3, 2009 13:30:48 GMT
Hi Steve.
These temp graphs, with perhaps one exception, look like hockey sticks to me, where the blade is at the start of the Holocene. My point is that they look nothing like other graphs of the Holocene I have seen. The long part of the stick is a little too straight, unnaturally straight, for my taste.
I wonder if the statistics used and pollen data drawn from will be trend-setting in the field of climatology, or left behind.
Can you and I agree that most evidence shows sea levels falling a little more than 2 meters since the period in question -- the Holocene Optimum?
Can we agree that the falling sea levels indicate that it was warmer then than now, on average, worldwide?
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Post by steve on Jun 3, 2009 14:16:14 GMT
Hi Steve. Can you and I agree that most evidence shows sea levels falling a little more than 2 meters since the period in question -- the Holocene Optimum? Can we agree that the falling sea levels indicate that it was warmer then than now, on average, worldwide? I'm not that knowledgeable on sea levels. There was a thread a week or two back where various impacts on sea level (in particular, rotation speed of the earth) was discussed, and I found out then that since the glacial maximum, isostatic rebound has meant that the earth has been getting elongated, north to south, and narrower around the equator as it responds to the loss of the large ice caps. This would cause isostatic sea level falls at the poles. Randomly googling abstracts in Google Scholar, I found one paper that talked about sea level falls at Antarctcia. I didn't find any strong feel for any sort of "consensus" position possibly due to the isostatic and techtonic changes. eg. this one talks about when "sea-levels first reached their present level", but also mentions some islands where the max was 4-2000 years ago. Late Pleistocene and Holocene sea-level change in the Australian region and mantle rheology Masao Nakada* 1 and Kurt Lambeck 1 Geophysical Journal International Volume 96 Issue 3, Pages 497 - 517 Where do you get your info that sea levels have fallen in the past few thousand years? There seem to have been differently timed temperature max (summer temperature max's for the NH) in the northern latitudes and the southern latitudes a few thousand years back. What effect would these have had on the mass balance? I don't know. |
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Post by woodstove on Jun 3, 2009 15:59:14 GMT
I was being generous by asking you to agree to 2 meters.  Source: www.epa.qld.gov.au/images/environmental_management/soe/coastal/coast_ppv_figa_holocene.gifFrom Wikipedia: Tree line The Atlantic [aka the Holocene Optimum] was a time of rising temperature and marine transgression on the islands of Denmark and elsewhere. The sea rose to 3 m above its present level by the end of the period. The oysters found there required lower salinity. Tides of up to 1 m were present. Inland, lake levels in all north Europe were generally higher, with fluctuations. The temperature rise had the effect of extending southern climates northward in a relatively short period. The treelines on northern mountains rose by 600 to 900 m (2000–3000 feet). Thermophilous (“heat-loving”) species migrated northward. They did not replace the species that were there, but shifted the percentages in their favor. Across middle Europe, the boreal forests were replaced by climax or “old growth” deciduous ones, which, though providing a denser canopy, were more open at the base. |
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Post by steve on Jun 3, 2009 17:46:20 GMT
I couldn't find the reference for this plot on the website, so I googled for queensland sea levels and found this:
Letters to Nature
Nature 302, 406 - 408 (31 March 1983); doi:10.1038/302406a0
Evidence for smoothly falling sea level relative to north Queensland, Australia, during the past 6,000 yr
The abstract says:
which kind of implies they think it relates to glacial rebound (isostatic) rather than lower sea levels due to more ice (eustatic). I couldn't access the full article without paying.
Following some references, I found this for which the pdf is available:
Refining the eustatic sea-level curve since the Last Glacial Maximum using far-and intermediate- …
K Fleming, P Johnston, D Zwartz, Y Yokoyama, K … - Earth and Planetary Science Letters, 1998
which seems to indicate uniform rising or stable, but not falling eustatic sea levels in the holocene.
This is a very old paper that predicts "emergence of beaches" in Australia and New Zealand. Haven't had a detailed look about what it says about Europe (it looks quite complex). Again, pdf available.
Global changes in postglacial sea level: a numerical calculation
JA Clark, WE Farrell, WR Peltier - Quaternary Research, 1978
This is info that is new to me I'm finding right now on the web. I'm not being selective. I'm not going to dogmatically insist that (eustatic) sea levels have risen monotonically since 20-odd thousand years ago.
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Post by woodstove on Jun 3, 2009 17:51:22 GMT
Hi Steve. No glaciers to speak of in Australia during the Ice Age; thus no post-glacial upthrusting of land in Australia.
--H.
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Post by steve on Jun 4, 2009 11:47:25 GMT
Hi Steve. No glaciers to speak of in Australia during the Ice Age; thus no post-glacial upthrusting of land in Australia. --H. Did you have a look at the paper? tinyurl.com/owd25wRemarkably, it is based purely on the response to melting of Northern Hemisphere ice sheets! No Australian ice sheets are assumed. |
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