Create an account Home  ·  Topics  ·  Downloads  ·  Your Account  ·  Submit News  ·  Top 10  
Mission Statement

· Home
· Forum
· Special Sections
· Advertising
· AvantGo
· Books
· Downloads
· Events
· Feedback
· Link to us
· Private Messages
· Search
· Stories Archive
· Submit News
· Surveys
· Top 10
· Topics
· Web Links
· Your Account

Who's Online
There are currently, 171 guest(s) and 0 member(s) that are online.

You are Anonymous user. You can register for free by clicking here

  • (August 7, 2024 - August 11, 2024) 2024 ExtraOrdinary Technology Conference

  • Hot Links

    American Antigravity

    Closeminded Science


    ECW E-Cat World


    Integrity Research Institute

    New Energy Movement

    New Energy Times



    Science Hobbyist

    T. Bearden Mirror Site


    Want to Know

    Other Info-Sources
    NE News Sites
    E-Cat World
    NexusNewsfeed ZPE
    NE Discussion Groups
    Energetic Forum
    Energy Science Forum
    Free_Energy FB Group
    The KeelyNet Blog
    OverUnity Research
    Tesla Science Foundation (FB)
    Vortex (old Interact)
    Magazine Sites
    Electrifying Times (FB)
    ExtraOrdinary Technology
    IE Magazine
    New Energy Times

    Interesting Links

    Click Here for the DISCLOSURE PROJECT
    SciTech Daily Review
    NEXUS Magazine

    Close-up look at a hurricane's eye reveals a new 'fuel' source
    Posted on Monday, May 14, 2007 @ 23:53:13 GMT by vlad

    Science In the eye of a furious hurricane, the weather is often quite calm and sunny. But new NASA research is providing clues about how the seemingly subtle movement of air within and around this region provides energy to keep this central "powerhouse" functioning.

    Picture Credit: NASA GSFC Scientific Visualization Studio

    Using computer simulations and observations of 1998's Hurricane Bonnie in southern North Carolina, scientists were able to get a detailed view of pockets of swirling, warm humid air moving from the eye of the storm to the ring of strong thunderstorms in the eyewall that contributed to the intensification of the hurricane.

    The findings suggest that the flow of air parcels between the eye and eye wall - largely believed trivial in the past - is a key element in hurricane intensity and that there's more to consider than just the classic "in-up-and-out" flow pattern. The classic pattern says as air parcels flow "in" to the hurricane's circulation, they rise "up," form precipitating clouds and transport warm air to the upper atmosphere before moving "out" into surrounding environmental air.

    "Our results improve understanding of the mechanisms that play significant roles in hurricane intensity," said Scott Braun, research meteorologist at NASA's Goddard Space Flight Center, Greenbelt, Md. "The spinning flow of air parcels - or vortices - in the eye can carry very warm, moist eye air into the eyewall that acts as a turbocharger for the hurricane heat engine." The research appears in the June 2007 issue of the American Meteorological Society's Journal of the Atmospheric Sciences.

    "While the 'in-up-and out' pattern has been the prevailing paradigm for the past five decades, when you closely examine intense hurricanes it's apparent that a second family of moist air parcels often travels from the border of the eyewall to the eye, where it picks up moisture from the ocean surface," said co-author Michael Montgomery, professor of meteorology at the U.S. Naval Postgraduate School, Monterey, Calif. "These moisture-enriched air parcels then rather quickly return to the main eyewall and collectively raise the heat content of the lower eyewall cloud, similar to increasing the octane level in auto fuel."

    The researchers analyzed thousands of virtual particles to track the movement of air between the eye and eyewall, and between the eyewall and its outside environment. To uncover the impact of these particles on storm intensity, they used a simulation of Hurricane Bonnie from a sophisticated computer model and data gathered during the NASA Convection and Moisture Experiment (CAMEX).

    The simulation has also helped to explain the formation of deep “hot towers” observed in Bonnie and many other hurricanes by NASA’s Tropical Rainfall Measuring Mission (TRMM) satellite. TRMM carries the first and only space-based precipitation radar that allows researchers to peer through clouds and get a 3-D view of storm structure. It captured a particularly deep hot tower in Bonnie as the storm intensified several days before striking North Carolina.

    Hot towers are deep, thick clouds that reach to the top of the troposphere, the lowest layer of the atmosphere, usually about ten miles high in the tropics. The updrafts within these "towers" act like express elevators, accelerating the movement of energy that boosts hurricane strength, and are called “hot” because of the large amount of latent heat they release as water vapor is condensed into cloud droplets. Deep hot towers in the eyewall are usually associated with a strengthening storm.

    In previous research, Braun, Montgomery, and Zhaoxia Pu of the University of Utah, Salt Lake City, found a direct relationship between these deep hot towers and the intense vortices inside the eye. "The vortices were shown to be especially crucial in providing the focus and lift needed for hot tower formation and add insight into when and where hot towers will develop in storms," said Braun. The study was published in the January 2006 CAMEX special issue of the Journal of the Atmospheric Sciences.

    Vortices are created in response to the rapid change in wind speed from the fierce eyewall to the calm eye. Near the surface, air spiraling inward collides with these vortices to force air up, forming updrafts. Strong updrafts in the eyewall carry moisture much higher than normal and help create hot towers.

    The current study suggests that in addition to providing lift, these vortices also feed high energy air from the low-level eye into the eyewall, boosting the strength of the updrafts. This transfer of energy allows the storm to remain stronger than expected, particularly when encountering weakening influences, including cooler ocean water temperatures and wind shear, the change in the direction and speed of winds with altitude.

    “This discovery may help explain why strong storms can remain intense for several hours or longer after encountering conditions that usually bring weakening," said Montgomery. "Ongoing research will add to our understanding of the dynamics associated with storm intensity so that we can pinpoint the variables and processes that must be represented in numerical models to improve intensity forecasts."

    When hurricane Bonnie finally began to lose strength a couple days before landfall, a significant amount of air in the eyewall was traced back - not to the eye - but to the middle levels of the atmosphere away from the storm. This inflow was caused by wind shear and brought much cooler, drier environmental air into Bonnie’s circulation, acting like an anti-fuel to reduce energy in the storm and weaken its strong winds.

    Despite these and other recent advances in understanding the internal workings of hurricanes, forecasting their intensity is still a significant challenge.

    "Most of today's computer models that aid forecasters cannot sufficiently account for the extremely complex processes within hurricanes, and model performance is strongly dependent on the information they are given on the structure of a storm," said Braun. "We also typically only see small parts of a storm at a given time. That is why it is important to combine data from field experiments such as CAMEX with data from TRMM and other satellites. As observing technologies and models improve, so too will forecasts."

    Source: by Mike Bettwy, Goddard Space Flight Center
    Via: http://www.physorg.com/news98367223.html



    Security Code: Security Code
    Type Security Code

    Don't have an account yet? You can create one. As a registered user you have some advantages like theme manager, comments configuration and post comments with your name.

    Related Links
    · More about Science
    · News by vlad

    Most read story about Science:
    100 miles on 4 ounces of water?

    Article Rating
    Average Score: 0
    Votes: 0

    Please take a second and vote for this article:

    Very Good


     Printer Friendly Printer Friendly

    "Close-up look at a hurricane's eye reveals a new 'fuel' source" | Login/Create an Account | 0 comments
    The comments are owned by the poster. We aren't responsible for their content.

    No Comments Allowed for Anonymous, please register


    All logos and trademarks in this site are property of their respective owner. The comments are property of their posters, all the rest © 2002-2016 by ZPEnergy. Disclaimer: No content, on or affiliated with ZPEnergy should be construed as or relied upon as investment advice. While every effort is made to ensure that the information contained on ZPEnergy is correct, the operators of ZPEnergy make no warranties as to its accuracy. In all respects visitors should seek independent verification and investment advice.
    Keywords: ZPE, ZPF, Zero Point Energy, Zero Point Fluctuations, ZPEnergy, New Energy Technology, Small Scale Implementation, Energy Storage Technology, Space-Energy, Space Energy, Natural Potential, Investors, Investing, Vacuum Energy, Electromagnetic, Over Unity, Overunity, Over-Unity, Free Energy, Free-Energy, Ether, Aether, Cold Fusion, Cold-Fusion, Fuel Cell, Quantum Mechanics, Van der Waals, Casimir, Advanced Physics, Vibrations, Advanced Energy Conversion, Rotational Magnetics, Vortex Mechanics, Rotational Electromagnetics, Earth Electromagnetics, Gyroscopes, Gyroscopic Effects

    PHP-Nuke Copyright © 2005 by Francisco Burzi. This is free software, and you may redistribute it under the GPL. PHP-Nuke comes with absolutely no warranty, for details, see the license.