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Thread: 2000 YEARS OF SEA LEVELS, 200bc--2012.AD.

  1. #1 2000 YEARS OF SEA LEVELS, 200bc--2012.AD. 
    The Enchanter westwind's Avatar
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    Googled this thread up and selected the following site. ""www.realclimate.org/index.php/archives/.../2000-years-of-sea-level/ ""

    Quote "". Stable sea level from 200BC until 1000AD.

    . a 400 year rise by about 6cm per Century up to 1400 AD.

    . Another stable peroid from 1400AD up to late 19th Century.

    . A rapid rise by about 20cm since. '' END Quote.

    This does not satisfy me. You may dismiss my Science as being naive, but I reasonably believe the sea level must have been higher during King Harolds time and the Norman Conquest. ie; 800AD/1100AD. Why do I believe this? Evidence produced by Time Team researchers when dating dig sites. Sites investigated by these researchers are often explained as having sea-access around the dates I have stated. Now they are miles inland. When They ( Time Team ), Diagrammictly( sic ), illustrate this by sketching sea inlets surrounding their dig Sites, it seems sound Science to me. Am I in Fact being a little naive here? My best estimate of the kind of sea level rises at this time, (1050AD), is about 180 cm above the present levels. To come up to these Dig Sites.....westwind.


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    Isostatic adjustment might account for that. Where exactly is the dig you're discussing? Northern England has risen a couple meters since Harald's time The other factor is silting which can fill and push a coast line miles out over a thousand years.


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    The Enchanter westwind's Avatar
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    For Lynx Fox. Thank you for your post. When you post that Northern England/ ( UK.? ), has risen a couple of metres since Harolds time, I find this very interesting. I had not considered the land rising independant of sea levels. I don't know why this hadn't occured to me. Perhaps because Time Team had not been saying this. As to the particular Dig Site I was perhaps referring to and will say this, it seems that, from memory. every third or fourth Dig Site they Participate in, is on what was, in Harolds time, was on a Promortry( sic ) or an Island connected by a Causeway, but now is surrounded by fields etc. If, in fact, it is land rise rather than sea level rise or sedimentation deposits, than my accociated connection with Climate Temperatures, both in the so called ''Dark Ages '' and then in Harolds time may not be relevant. I thought land temperatures in the Dark Ages may have been a lot colder, preventing ripening of crops etc, resulting in the Vandals and the Visogophs and the Attila the Huns getting on their Horses , sharpening their swords and maurauding all over Southern Europe seeking warmth and food. westwind.
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    The people of the british isles have also been actively draining tidal marshlands with dikes, canals and similar works for the last thousand years. People change coastlines too.
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    WYSIWYG Moderator marnixR's Avatar
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    the isostatic rise of the the north of britain seems to be correlated with a sinking in the south + erosion of mostly the east + south coast
    i happen to have been in Lincolnshire / Norfolk over the weekend and visited Flag Fen which over bronze age + iron age times gradually became inundated, only to silt up later on over historic times

    it's not always easy to distinguish between the various geological forces at work though
    "Reality is that which, when you stop believing in it, doesn't go away." (Philip K. Dick)
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    Forum Isotope Bunbury's Avatar
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    The Jacobites always said Scotland would rise again.
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  8. #7  
    Forum Radioactive Isotope sculptor's Avatar
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    alternately phrased sea level rose as planet warmed culminating in the midieval warm period
    then fell a bit during and after the onset of the "little ice age"
    then started rising again as we warm up after the little ice age
    added to which is that any land under (and depressed by) the glaciers has been rebounding since they melted

    meanwhile we are constantly bombarded with water from comets.etc
    (wild guess) the long term will see constant sea level rise interrupted by lower sea level during periods of glaciation
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