NASA Study Links Severe Storm Increases To Global Warming | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

** Airborne 04.23.14--CLICK HERE! ** HD iPad-Friendly Version--Airborne 04.23.14 **
** Airborne 04.21.14--CLICK HERE! ** HD iPad-Friendly Version--Airborne 04.21.14 **
** Airborne 04.18.14--CLICK HERE! ** HD iPad-Friendly Version--Airborne 04.18.14 **

Tue, Dec 23, 2008

NASA Study Links Severe Storm Increases To Global Warming

Study's Findings Consistent With Earlier Report, Says Scientists

The frequency of extremely high clouds in Earth's tropics -- the type associated with severe storms and rainfall -- is increasing as a result of global warming, according to a study by scientists at NASA's Jet Propulsion Laboratory, Pasadena, CA.

In a presentation Friday to the fall meeting of the American Geophysical Union in San Francisco, JPL Senior Research Scientist Hartmut Aumann outlined the results of a study based on five years of data from the Atmospheric Infrared Sounder (AIRS) instrument on NASA's Aqua spacecraft.

The AIRS data were used to observe certain types of tropical clouds linked with severe storms, torrential rain and hail. The instrument typically detects about 6,000 of these clouds each day. Aumann and his team found a strong correlation between the frequency of these clouds and seasonal variations in the average sea surface temperature of the tropical oceans.

For every degree Centigrade (1.8 degrees Fahrenheit) increase in average ocean surface temperature, the team observed a 45-percent increase in the frequency of the very high clouds. At the present rate of global warming of 0.13 degrees Celsius (0.23 degrees Fahrenheit) per decade, the team inferred the frequency of these storms can be expected to increase by six percent per decade.

Climate modelers have long speculated that the frequency and intensity of severe storms may or may not increase with global warming. Aumann said results of the study will help improve their models.

"Clouds and rain have been the weakest link in climate prediction," said Aumann. "The interaction between the daytime warming of the sea surface under clear-sky conditions and increases in the formation of low clouds, high clouds and, ultimately, rain is very complicated. The high clouds in our observations—typically at altitudes of 20 kilometers (12 miles) and higher—present the greatest difficulties for current climate models, which aren't able to resolve cloud structures smaller than about 250 kilometers (155 miles) in size."

Aumann said the results of his study, published recently in Geophysical Research Letters, are consistent with another NASA-funded study by Frank Wentz and colleagues in 2005. That study found an increase in the global rain rate of 1.5 percent per decade over 18 years, a value that is about five times higher than the value estimated by climate models that were used in the 2007 report of the Intergovernmental Panel on Climate Change.

FMI: http://airs.jpl.nasa.gov/

Advertisement

More News

Classic Aero-TV: Aero-Statesman Phil Boyer – Representing The Aviation Community

Retired AOPA President Still Understands What An Association Must Do To Serve An Embattled Industry Originally WebCast October 18, 2012: Its been nearly four years since Phil Boyer>[...]

AD: Ballonbau Wörner GmbH Balloons

AD NUMBER: 2014-07-10 PRODUCT: Ballonbau Wörner GmbH Models NL-280/STU, NL-380/STU, NL-510/STU, NL-640/STU, NL-840/STU, and NL-1000/STU balloons.>[...]

Airshow Pilot Bails Out After Catastrophic Aircraft Failure

Planning Ahead And Staying Safe Saves A Professional Airshow Pilot Dan Marcotte describes himself on his website as being determined and driven with a sense of vision. His adventur>[...]

ANN FAQ: Share Aero-News With Your Friends

Send Them A Story -- We Don't Mind! Do you need another set of eyes to see that story you can't believe Jim just wrote? Want to spread Hognose's unique wisdom and perspective to th>[...]

AD: Centrair Gliders

AD NUMBER: 2014-07-08 PRODUCT: Centrair Model 101, 101A, 101AP, and 101P gliders.>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2014 Web Development & Design by Pauli Systems, LC