Andrew Warren wrote: > Richard Prosser wrote: > >> A TV program the other night claimed that the sea level would rise >> just due to the expansion of the water as it heated up - even a >> fraction degree of difference would raise the water level a few >> inches I think they said. Seemed a bit extreme at the time but I >> haven't tried to calculate it myself. Any thoughts? Cubic quantity >> of seawater =3D ? > > 1,370,000,000 cubic kilometers. > >> bulk temperature expansion coefficient of seawater =3D ? > > Varies according to temperature. At 0 degrees C, it's 0.000051 > per degree C. At 15 degrees C, it's 0.000214 per degree C. At > 31 degrees C, it's 0.000334 per degree C. ...then lets suppose all the water volume is at 0=B0C for the sake of the calculation, and considering 1.37x10^9 cubic kilometers, expansion of 0.000051/=B0C. Consider temperature increase in only 5=B0C, it means 0.00= 025 (2.5x10-4), lets also consider that this expansion only happens over 10% = of the ocean water, over 1.37x10^8 =3D around 3.4x10^4 cubic kilometers of w= ater expansion, spread over 3.61x10^4 square kilometers of the water surface, = it results in aprox 100 meters above actual sea level. We know that the wate= r surface does not represent the same of the bottom, the pressure will stay the same, what means it will not compress more water in the deep levels. The seas will be invading land in a proportion around 85%, so probably on= ly 15 meters will be the extra sea level increase. But also, remember that this calculation is using the 0=B0C expansion coefficient as average, and= not the real numbers that are bigger. Can someone project what means increasing sea levels over the global map, and see what stays dry? Can y= ou imagine what could happens with fertile lands? population concentration? I will start to think to buy a nice boat to live in ;) Wagner. > >> Suface area of sea =3D ? > > 70.8 percent of the Earth's surface. Earth's surface area is > approximately 511,210,000 square kilometers, so surface area of > the sea is approximately 361,937,000 square kilometers. > > -Andy > > =3D=3D=3D Andrew Warren -- aiw@cypress.com > =3D=3D=3D Principal Design Engineer > =3D=3D=3D Cypress Semiconductor Corporation > =3D=3D=3D > =3D=3D=3D Opinions expressed above do not > =3D=3D=3D necessarily represent those of > =3D=3D=3D Cypress Semiconductor Corporation > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. /_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/ Wagner Lipnharski - UST Research Inc Orlando FLorida - USA - www.ustr.net /_/_/_/ Atmel AVR Consultant /_/_/_/ -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.