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Summer Sea Levels Rising Fast Along Florida's Gulf Coast
By Becky Oskin, Staff Writer | January 30, 2014 04:03pm ET
Summer high tides are getting higher in the eastern Gulf of Mexico,
boosting the destructive power of hurricanes, a new study finds.
The trend is strongest in Florida, such as in Key West, where tidal
flooding regularly inundates low-lying city streets. Summer sea levels
are now 1.8 inches (4.5 centimeters) higher than before 1993, and that's
on top of the contribution from global sea level rise, according to the
study, published Jan. 3 in the journal Geophysical Research Letters. On
the flip side, winter tides are now lower, the study finds.
Put more simply, in the past two decades, summer sea level has increased
on Florida's Gulf Coast by a total of 4 inches (10 cm). "Sea level is
rising because of global warming, but on top of this, the seasonal cycle
is also changing," said Thomas Wahl, lead study author and a coastal
engineer at the University of South Florida in St. Petersburg. "We don't
know whether this is climate change or part of a natural cycle, but this
increase over the last 20 years is not found elsewhere in the world."
All coastlines undergo seasonal cycles in their tides. Summer tides are
higher than winter tides because of several factors, such as the
difference between summer and winter water temperatures; rainfall and
seasonal changes in air temperature; and wind. (For example, cold water
takes up less volume than warm water, so the tides in winter are lower.)
Email Becky Oskin or follow her [MENTION=20668]Becky[/MENTION]oskin. Follow us @livescience,
Facebook& Google+. Original article on Live Science.
www.foxnews.com
By Becky Oskin, Staff Writer | January 30, 2014 04:03pm ET
Summer high tides are getting higher in the eastern Gulf of Mexico,
boosting the destructive power of hurricanes, a new study finds.
The trend is strongest in Florida, such as in Key West, where tidal
flooding regularly inundates low-lying city streets. Summer sea levels
are now 1.8 inches (4.5 centimeters) higher than before 1993, and that's
on top of the contribution from global sea level rise, according to the
study, published Jan. 3 in the journal Geophysical Research Letters. On
the flip side, winter tides are now lower, the study finds.
Put more simply, in the past two decades, summer sea level has increased
on Florida's Gulf Coast by a total of 4 inches (10 cm). "Sea level is
rising because of global warming, but on top of this, the seasonal cycle
is also changing," said Thomas Wahl, lead study author and a coastal
engineer at the University of South Florida in St. Petersburg. "We don't
know whether this is climate change or part of a natural cycle, but this
increase over the last 20 years is not found elsewhere in the world."
All coastlines undergo seasonal cycles in their tides. Summer tides are
higher than winter tides because of several factors, such as the
difference between summer and winter water temperatures; rainfall and
seasonal changes in air temperature; and wind. (For example, cold water
takes up less volume than warm water, so the tides in winter are lower.)
Email Becky Oskin or follow her [MENTION=20668]Becky[/MENTION]oskin. Follow us @livescience,
Facebook& Google+. Original article on Live Science.
www.foxnews.com
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