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Sea Level

• Message 1. 

  Posted by henvell (U1781664) on Wednesday, 3rd August 2005

  G Henderson [2005] estimated that sea level would rise by 70m,if all the earth's ice melted [ie.the icesheets on Greenland would add about 7m].
  This type of calculation can be equivical.Has anyone sighted estimates from other sources?
  

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• Message 2

  , in reply to message 1.

  Posted by John Paul (U1698054) on Saturday, 6th August 2005

  Henvell, howzit?
  
  I really do not believe such stories; the northern pole ice cap has melted every summer for the past few years, and every winter the ice line receeds.
  
  But the sea has not raised its level as was predicted.
  
  Maybe the extra water just bulges out at the tropics, due to the rotation of the earth. Between the vastness of the oceans, 71%, and the ground's capacity to absorb water, I really am not worried, ( but I am over 1500 metres above sealevel ).
  
  The Dutch are, and have built an outer defence from rises in the sea level; I think they have storm high water levels in mind, not a permanent rise of the sea level.
  
  Anyway, best wishes,
  
  John Paul

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• Message 3

  , in reply to message 2.

  Posted by BlueHue1 (U1820231) on Monday, 8th August 2005

  FROM 9000 until 855 mean sealevel rtose a mere 100 meters; however from 855 until 755 mean sealevel rose a:"huge"50 meters, making 150 meters since 9.000 Bc. All during the last ice-age
  and the hotter climate-Gletscher melting no apperent extra Sealevel rise was reported, but there is a geological"catch'to that Notion: Why, was a 50 meter's rise in:- 855 possible? because of something MOST geopysicists and paleo-geologists simply forget or take for granted as a"common-oversight"yet this "geologic feature"of geophysics, is well known: but
  
  NEVER incalculated with Sea-level rise history: the magnificent:"Quarternary LAKE-burst"which made former shallow inland Seas dry as in thed present deserts on Earth. So for instance the North-African Sahara-/Erg/ develloped about circa 800 Bc into the present deserts of Tassili-N-ger in South Algeria and thus those rockmark paintings can be safely attributed to about 855 Bc.
  
  "When "Grace"was handed-out, I was behind the kitchendoor (Quote from: "TV-Sitcom:"Rip-Tide"1980.)

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• Message 4

  , in reply to message 2.

  Posted by Aloof Nudist (U1727083) on Wednesday, 10th August 2005

  But the sea has not raised its level as was predicted. Maybe the extra water just bulges out at the tropics, due to the rotation of the earth. 
  
  Actually it's absorbed by sponges.

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• Message 5

  , in reply to message 4.

  Posted by TonyG (U1830405) on Wednesday, 10th August 2005

  If sea levels have been rising, how come many cities which in ancient times were on the coast, are now well inland, sometimes by several miles? If the sea is rising, wouldn't this compensate for the effects of rivers silting up?
  
  Or is the sea being perverse and only rising in certain parts of the globe?

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• Message 6

  , in reply to message 5.

  Posted by BlueHue1 (U1820231) on Saturday, 13th August 2005

  DEAR SIR, "Statistically"seen :From 9.000 Bc until: 855 Bc. Mean-Selevel r9iser was a mere 100 M. in 8.000 years, However inbetween 855-755 MEAN-Sealevel rise(= Eustatics!)was a "Huge" 50 Meters because a paSssing Comet"Dione" melted the Quarternary Lakes(="Quarternary Lake-Burst")BEFORE THAT MOST DEEPSEA OCEANS WERE DRY: COMPARE THE iNDIAN Indusriver Siltcone which was formed ABOVE seawater Level and is 5000 meters high!
  Many nations must thus have "inhabited"the DRY Indian-ocean Sea-floor. Today Gletsher and ant-Arctic ice melt free sweetwater but electrical waterdams ( eg.Niledam.)retain melt/rainwaters!
  Sorry I can provide no geometrical specifics.!

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• Message 7

  , in reply to message 5.

  Posted by GrumpyGeegee (U2843410) on Thursday, 29th December 2005

  Re message 5, two things are happening simultaneously. The sea level is (still) rising due to ice melting and the land level is rising where it was covered with ice, Therefore it depends on where you are whether the sea is rising faster than the land or not.

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• Message 8

  , in reply to message 6.

  Posted by Artorious (U1941655) on Thursday, 29th December 2005

  Hi Bluehue
  
  Interesting as Haleys comet would have visited around 690BC, 770BC, 850BC. Only estimated as its visits vary bewteen 76 to 79 years. Where is the data that points to sea level rises during this period, do you have a link?
  
  It would help to explain alot of the problems that occured during this time which I have attributed to earthquakes and flooding.
  
  Here is a piece of text from the reign of Shalmanasser III 858-824. Now in this text he speaks of a flood as though it had only recently happened and had been witnessed. His description in my opinion is of person who has personally wintessed this destruction. Could it also relate to the flood that the Atlantis myth is based on?
  What are your views on this interpreatation?
  
  From, first Year, Monilith inscriptions.
  " ... I overthrew the ... of the Upper [Sea] of Amurru and of the Western Sea (so that they became) like ruin-hills (left by) the flood. I received tribute from the kings of the seashore. I marched straightaway, unopposed ... throughout the wide seashore. "
  
  

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• Message 9

  , in reply to message 5.

  Posted by Stoggler (U1647829) on Friday, 30th December 2005

  If sea levels have been rising, how come many cities which in ancient times were on the coast, are now well inland, sometimes by several miles? If the sea is rising, wouldn't this compensate for the effects of rivers silting up?
  
  Or is the sea being perverse and only rising in certain parts of the globe? 
  
  A couple of reasons - one is longshore drift, the process of material being eroded from some parts of the coastline and being deposited in others. Britain has some good examples - of towns that were ports and are now inland, such as Rye in Sussex which was on the coast in the middle ages but is now a couple of miles inland (although still on a river). Additionally, there is isostacy, the process of the landmasses righting themselves slowly following the release of weight from the receeding icepacks - northern Britain is rising in relation to the sea level whereas southern Britain is slowly sinking.
  
  So it comes down to local geographical and historical factors that determine whether cities have been flooded or stranded inland overtime.

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• Message 10

  , in reply to message 9.

  Posted by hathor_101 (U2740307) on Friday, 30th December 2005

  this isn't axactly ancient and archeology is it? im sure theres a place for this on the news board or something
  
  best,
  
  hathor

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