Question:

If I put a stick in the ocean, drove it in the ground and marked the water level when Al's movie came out?

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How much deeper would the water be now?

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12 ANSWERS


  1. with or without tidal effects.


  2. Because of the tides of the ocean, your measurement would have greater uncertainty than any possible change that you could measure with that technique.

  3. Sea level has been rising at an average rate of a couple of millimeters per year.  I don't think you could measure it with just a stick, though, it's not that easy a thing to do.  It's tricky just to differentiate whether the land is sinking or the water is rising.

  4. About 7mm, a little more than a quarter of a an inch.

    http://sealevel.colorado.edu/

    Note that you'd have to do it at several spots around the world to get an accurate number, there are local variations.

    EDIT - It goes without saying that you'd have to compensate for tides, etc.  Basic science.

  5. The mean water level would be the same now as then.  There would be no change, at least not due to global warming.  But if Al knew you were doing this experiment he'd have someone push the stick a few feet deeper.

  6. It came out what, two years ago?   About two millimeters.

  7. Current rate:

    "Using measurements of time-variable gravity from the Gravity Recovery and Climate Experiment (GRACE) satellites we determine mass variations of the Antarctic ice sheet during 2002-2005. We find that the ice sheet mass decreased significantly, at a rate of 152 ± 80 km3/year of ice, equivalent to 0.4 ± 0.2 mm/year of global sea level rise. Most of this mass loss came from the West Antarctic Ice Sheet. "

    http://www.sciencemag.org/cgi/content/ab...

    Current future outlook:

    "Potential sea level rise on the millennial timescale (excluding the contribution of Antarctica), is 0.5-11.4m in GENIE-1 and 1.0-8.5m in MoBidiC.  Collapse of the West Antarctic Ice Sheet, if it occurs, could add up to 4-6m on the millennial timescale [Oppenheimer and Alley, 2004]"

    http://www.tyndall.ac.uk/research/theme1...

  8. Well the insulting addendum confirms that you weren't really asking a question, merely making a statement with a question mark at the end and/or asking for people to agree with your world view...

    Still, the theoretical answer would be about 2mm.

    The real world answer is that it would not be possible to measure it (due to the reasons given above) but that it would indicate to outsiders the depth of your ignorance. (You started the insults!)

  9. Excellent question.

    According to Al's movie we should all be treading water by now.

    Thank you.


  10. al gore is a scare monger there is no hard evidence that humans have anything to do with global warming.

  11. First of all, you didn't say where you are located.   Tides range from a few inches to 53 feet, depending on your location.    Secondly, did you put it in at low tide, high tide or somewhere in between?    Lastly, are you in an uplifting area or a sinking area?    No, no warmers could answer your question intelligently when you can't even give enough information for them to make a decent guess.

  12. Global warming causes drought! There should be less water

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