Not exact matches
We have
much better — and more conclusive — evidence for climate change from more boring sources like
global temperature
averages, or the extent of
global sea ice, or thousands of years» worth of C02
levels stored frozen in ice cores.
Bangladeshis have watched high tides rise 10 times faster than the
global average, and
sea levels there could increase as
much as 13 feet by 2100.
For example, New York City is expected to see regional
sea levels rise as
much as 30 percent more than the
global average.
Too
much debate treats temperature (and especially the most recent
global average) as the sole indicator, whereas many other factors are at play including
sea levels, ocean acidity, ice sheets, ecosystem trends, and many more.
Exactly how
much the
average global sea level will rise in the future will depend on our greenhouse gas emissions.
Take South Florida, where, a few years back, the rate of
sea level rise shot up from close to the
global average to something
much higher.
Many recent studies (e.g. Hansen & Sato) have claimed that future rise in
global average temperature (GAT) will create a
much greater effect on
sea level than IPCC AR4 predicts.
Over the long - term, melting of the West Antarctic Ice Sheet could yield as
much as 10 to 14 feet of
global average sea level rise, with local
sea level rise varying considerably depending on land elevation trends, ocean currents and other factors.
Specifically, the
sea level has increased by 5.4 millimeters annually since 1990, which is twice as
much as the
global average.
If we do nothing to reduce our carbon emissions, scientists project that
global sea level could rise as
much as nearly two feet (59 centimeters) over recent
average levels by the end of this century.14, 15 If, on the other hand, we make significant efforts to reduce heat - trapping emissions,
sea -
level rise between now and the end of the century could be limited to at most 1.25 feet (38 centimeters).14, 15
Global average temperatures were between 5.4 and 7.2 degrees Fahrenheit (3 to 4 degrees Celsius) higher than today, and
sea level was as
much as 131 feet (40 meters) higher in some places.
Average global sea level has increased eight inches since 1880, but is rising
much faster on the U.S. East Coast and Gulf of Mexico.
Some areas are experiencing triple or more the
global average while others are seeing over 5 times as
much in
sea level fall as their part of the Earth's surface is rising.
--- Atmospheric mass and composition: approx. 510 trillion m ^ 2 (surface area) * 0.1013 MPa (surface pressure) / 9.81 m / s ^ 2 = 5.266 E18 kg = 5.266 million Gt Hartmann, «
Global Physical Climatology», p. 8 gives 5.136 million Gt (the difference could be due to actual average surface pressure being lower than average sea level pressure; counteracting that, gravity decreases with height (not much over most of the mass of the atmosphere) and I think global average g may be less than 9.81 (maybe
Global Physical Climatology», p. 8 gives 5.136 million Gt (the difference could be due to actual
average surface pressure being lower than
average sea level pressure; counteracting that, gravity decreases with height (not
much over most of the mass of the atmosphere) and I think
global average g may be less than 9.81 (maybe
global average g may be less than 9.81 (maybe 9.80?)
For more than half a century tide gauges have indicated that the Chesapeake Bay's
sea level has been rising twice as
much as the
global average and faster than anywhere else on the East Coast.