Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

URI oceanographer studies the effects of inland water on the intensity of landfalling hurricanes

26.09.2002


One of the known facts about landfalling hurricanes is their rapid decay, yet some of them retain tropical storm winds and gusts well inland. While studies have shown that the reduction in surface evaporation is a reason for hurricane decay during landfall, little is known about the effect of land surface water on the intensity of hurricanes.



In a recent issue of the Journal of Atmospheric Sciences, URI Graduate School of Oceanography (GSO) physical oceanographer Isaac Ginis, Weixing Shen, formerly with GSO and now at NOAA’s National Center for Environmental Prediction, and Robert E. Tuleya of NOAA’s Geophysical Fluid Dynamics Laboratory (GFDL) in Princeton, New Jersey, studied the effect of land surface water on hurricane intensity. The team found that under some conditions, the presence of less than two feet of water could noticeably reduce landfall decay.

Previous studies of land-falling hurricanes used fixed underlying surface conditions. The current study, using the GFDL hurricane model, investigated the effects of land surface water on land-falling hurricanes, including surface temperature changes and their influence on changes in surface heat, hurricane structure, and intensity. The team of scientists used a range of water depths and surface roughness conditions to correspond to a possible array of surface conditions.


Funded by the National Science Foundation, the study showed that during hurricane landfall over a water-covered land, large local surface cooling occurs near the hurricane core region. This surface cooling causes a reduction in evaporation, the primary energy source for hurricanes, thus considerably reducing hurricane intensity during landfall. The reduction depends on the presence and depth of surface water. With a two-foot layer of surface water, the hurricane will maintain its intensity, but collapse over dry land.

An increase in surface roughness significantly reduces the surface winds but only yields a small increase in the central pressure because while surface roughness increases surface drag, it also increases surface evaporation which fuels a hurricane’s intensity.

When a hurricane travels over land, the amount of surface evaporation is considerably less than when it travels over water. However, the scientists found that this condition does not produce any large changes in the size of the eye of the storm, even when hurricane intensity is significantly reduced.

Ginis, along with GSO physical oceanographer Lewis Rothstein, developed a computer model to predict the intensity of hurricanes. The GSO model was coupled with a hurricane model created by National Oceanographic and Atmospheric Administration’s (NOAA) Geophysical Fluid Dynamic Laboratory (GFDL) to provide a more efficient set of predictors that take into consideration the effects of atmosphere-ocean interaction during storms and more accurate predictions of storm intensity. In 2000, the coupled model became an official component of the national hurricane prediction system used to forecast Atlantic and Gulf of Mexico tropical storms and hurricanes.

The URI Graduate School of Oceanography is one of the country’s largest marine science education programs, and one of the world’s foremost marine research institutions. Founded in 1961 in Narragansett, RI, GSO serves a community of scientists who are researching the causes of and solutions to such problems as acid rain, harmful algal blooms, global warming, air and water pollution, oil spills, overfishing, and coastal erosion. GSO is home to the Coastal Institute, the Coastal Resources Center, Rhode Island Sea Grant, the Institute for Archaeolocial Oceanography, and the National Sea Grant Library.


Media Contact: Lisa Cugini, (401) 874-6642, lcugini@gso.uri.edu
Isaac Ginis, (401) 874-6484, iginis@gso.uri.edu

Lisa Cugini | EurekAlert!

More articles from Earth Sciences:

nachricht PR of MCC: Carbon removal from atmosphere unavoidable for 1.5 degree target
22.05.2018 | Mercator Research Institute on Global Commons and Climate Change (MCC) gGmbH

nachricht Monitoring lava lake levels in Congo volcano
16.05.2018 | Seismological Society of America

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Research reveals how order first appears in liquid crystals

23.05.2018 | Life Sciences

Space-like gravity weakens biochemical signals in muscle formation

23.05.2018 | Life Sciences

NIST puts the optical microscope under the microscope to achieve atomic accuracy

23.05.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>