How much sea level raised during last century?

Question

please write your source (if is it)

Answer 1

Subject: IT IS NOT GLOBAL WARMING, BUT IT IS A SHIFT IN CLIMATE ZONES DUE TO THE DECREASE IN THE EARTH'S OBLIQUITY

> The earth's obliquity Angle decreases by 0.47" each

> year, which changes the focus of the sun's radiation

> on earth, resulting in climate shifts. As the

> obliquity angle decreases, the hemispheres change in

> basic temperature with the south becoming colder and

> the north becoming warmer.  When the obliquity angle

> reaches about 22 degrees, it will start to go the

> other way and the north will get colder again and the

> south will become warmer.  Obviously, and counter to

> Al Gores unlearned theories, the warming of the

> northern hemisphere cannot be stopped by man.  It will

> stop and reverse itself.  Then the climate shifts we

> presently experience will be goin the other way.  It

> is pure logic applied to astro-physical law.

>

> It has long been recognized that rather than staying

> constant, obliquity varies slowly with time as a

> result of external gravitational influences. The Moon

> and Sun's tidal torques on Earth's ellipticity give

> rise to the familiar 26,000-year astronomical

> precession, while the gravitational pull of other

> planets, primarily Jupiter and Venus, slowly perturbs

> the orientation of the ecliptic plane in space. The

> combined effect observed by Earth dwellers is an

> ~41,000-year oscillation in the obliquity with overall

> amplitude typically of about 2°. This oscillation is

> one of the three Milankovitch cycles that ultimately

> affect our long-term climatic system and serve as the

> pacemaker of ice ages. The present-day obliquity

> happens to be close to the mean value, and we are in

> the middle of a downswing (see figure (1)). In terms

> of real distance on the Earth's surface, one should

> see a slow equatorward shift of the tropics by 14.4 m

> a year-well over 1 km in a century!  

Answer 2

3 millimeters, 1/8".

Answer 3

how do you differentiate between sea level rise and shoreline dropping????

Answer 4

Maybe a couple of inches total.

Answer 5

SO small of an amount --- that only a scientist having access to radar satellite data would notice!

Here is the data chart for about 1/2 way up the East Coast-- personally I don't see any change over time.... the last 20 or so years since the satellite data has been available.

http://sealevel.colorado.edu/wizard.php?...

For 100 years you need to use a TIDE gauge-- I like this writeup -- read it-- because it shows the WHAT IF of global warming that does not agree with the actual data.

http://www.cru.uea.ac.uk/cru/info/slr/

and here is one more SAT chart near Panama and Costa Rica-- you can do it yourself by clicking on the world chart

http://sealevel.colorado.edu/wizard.php?...

Answer 6

I do not like Wiki for data as it is highly biased, but it provides a sea level graph here. Notice that since we left the last mini ice age around 1860, the level os sea rise has been fairly constant. Seems maybe we are not the cause.

The article states that since 1900 to 2000, there has been an 18.5 cm increase (that is about 7" in 100 years). I guess the people living on the beach may have fair warning before they need to move inland. So after 200 years, the sea level may increase about 1 foot if it continues at current pace.  Could someone please tell me how Al Gore came up with 20'?

http://en.wikipedia.org/wiki/Image:Recen...