Friday, August 14, 2009

Study Finds Big Storms on a 1,000-Year Rise. Penn University material.


The North Atlantic Ocean has spawned more hurricanes and tropical storms over the last decade than it has since a similarly stormy period 1,000 years ago, according to a new study.

August 13, 2009
By LAUREN MORELLO of ClimateWire
This story was updated at 2:15 p.m. EDT.

For more news on energy and the environment, visit http://www.climatewire.net/.
This story was updated at 2:15 p.m. EDT.
"...this study is an independent data point from the paleo record that gives more weight to the proposition that warming the tropical Atlantic will continue to give us a higher level of hurricane and tropical cyclone activity."climate scientist Michael Mann of Pennsylvania State University
Source:http://www.nytimes.com/cwire/2009/08/13/13climatewire-study-finds-big-storms-on-a-1000-year-rise-94323.html?pagewanted=print


According to this latest study appeared in the journal "Nature" can be seen that the journey of the Vikings came to America in climatic conditions much better than the current sudden and unexpected changes in climate. (Blogger comment)

The North Atlantic Ocean has spawned more hurricanes and tropical storms over the last decade than it has since a similarly stormy period 1,000 years ago, according to a new study.
The research, published yesterday in the journal Nature, tries to trace the pattern of storms along North America's Atlantic and Gulf coasts back to A.D. 500, well before humans were recording weather observations.
The study's lead author, climate scientist Michael Mann of Pennsylvania State University, said
finding a reliable way to reconstruct centuries of past hurricane activity could help scientists tease out whether future climate change will alter storm patterns.
"One of the driving motivations for this research is to place in a longer-term context ... Atlantic tropical cyclone behavior, and the extent to which it may be anomalous," he said.
Two way of research the same problem:
"paleotempestology," or the study of ancient storms:
1)For the new study, Mann and his co-authors at the University of Massachusetts and the Woods Hole Oceanographic Institution collected cores at eight sites along the U.S. Atlantic and Gulf coasts, ranging from southern Massachusetts to Vieques Island, Puerto Rico.
2)The researchers also used a computer model to simulate 1,500 years of Atlantic storms, feeding in information collected between 1851 and 2006 about factors known to influence hurricane activity, including sea surface temperatures in the tropical Atlantic Ocean, the occurrence of El Niño weather patterns, and fluctuations in the jet stream.

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