Featured Research

from universities, journals, and other organizations

Scientists Probe The Jet Stream For Clues To Clear Air Turbulence

Date:
January 29, 1999
Source:
National Center For Atmospheric Research (NCAR)
Summary:
Through early February, a team of scientists is sending probes into the jet stream over the Pacific Ocean to learn more about clear air turbulence. Research aircraft are dropping instruments over portions of the ocean to improve forecasts of weather systems and provide insight into the sudden, invisible gusts that pose a hazard to aircraft.

BOULDER--Through early February, a team of scientists is sending probesinto the jet stream over the Pacific Ocean to learn more about clear airturbulence. Research aircraft are dropping instruments over portions ofthe ocean to improve forecasts of weather systems and provide insightinto the sudden, invisible gusts that pose an extreme hazard toaircraft. The program is a collaborative effort between the NationalCenter for Atmospheric Research (NCAR), the National Oceanic andAtmospheric Administration (NOAA), the Federal Aviation Administration,and the Naval Research Laboratory (NRL) in Monterey, California. NCAR'sprimary sponsor is the National Science Foundation.

Commercial pilots flying east take advantage of the fast-moving winds atabout 35,000 feet, in the jet stream's central core, to gain extramomentum. However, this puts them at risk for clear air turbulence.Twenty passengers aboard a Japanese airliner were injured on January 20as the aircraft was struck by severe turbulence above the northwestPacific just east of Japan. Scientists want to understand why some jetstreams produce severe turbulence and others do not. "The idea is toexamine the core's structure to see what role it might be playing inclear air turbulence," says NCAR scientist Robert Gall.

The special observations of turbulence are piggybacking onto the WinterStorm Reconnaissance flights being sponsored by NOAA's National WeatherService (NWS) in cooperation with the NOAA Aircraft Operations Centerand the U.S. Air Force Reserves. Researchers are planning two dedicatedmissions with the NOAA G-IV aircraft from Honolulu between January 16and February 15, in addition to the Winter Storm Reconnaissance flights.

Dropwindsondes deployed into turbulent areas of the jet stream willprovide data on the structure of the jet stream between 27,000 and45,000 feet, the flight altitude of major airlines. The project's datawill be used to verify experimental turbulence prediction models atNCAR, NOAA, and NRL and to learn how operational NWS forecast modelsmight be improved to give pilots more accurate warnings of turbulence.

NCAR is managed by the University Corporation for Atmospheric Research,a consortium of more than 60 universities offering Ph.D.s in atmosphericand related sciences.

-The End-

Note to Editors: Members of the media are invited to participate inthe Pacific data-gathering missions. For details on getting on theflights, flight dates, and times from Honolulu, contact: Delores Clark,NOAA Public Affairs, Honolulu, (808) 532-6411.

Find this news release on the World Wide Web at http://www.ucar.edu/publications/newsreleases/1999/clearair.html

To receive UCAR and NCAR news releases by e-mail, telephone 303-497-8601orsend name, affiliation, postal address, fax, and phone number tobutterwo@ucar.edu


Story Source:

The above story is based on materials provided by National Center For Atmospheric Research (NCAR). Note: Materials may be edited for content and length.


Cite This Page:

National Center For Atmospheric Research (NCAR). "Scientists Probe The Jet Stream For Clues To Clear Air Turbulence." ScienceDaily. ScienceDaily, 29 January 1999. <www.sciencedaily.com/releases/1999/01/990128170237.htm>.
National Center For Atmospheric Research (NCAR). (1999, January 29). Scientists Probe The Jet Stream For Clues To Clear Air Turbulence. ScienceDaily. Retrieved July 23, 2014 from www.sciencedaily.com/releases/1999/01/990128170237.htm
National Center For Atmospheric Research (NCAR). "Scientists Probe The Jet Stream For Clues To Clear Air Turbulence." ScienceDaily. www.sciencedaily.com/releases/1999/01/990128170237.htm (accessed July 23, 2014).

Share This




More Earth & Climate News

Wednesday, July 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

New Orleans Plans to Recycle Cigarette Butts

New Orleans Plans to Recycle Cigarette Butts

AP (July 21, 2014) — New Orleans is the first U.S. city to participate in a large-scale recycling effort for cigarette butts. The city is rolling out dozens of containers for smokers to use when they discard their butts. (July 21) Video provided by AP
Powered by NewsLook.com
Shark Sightings a Big Catch for Cape Tourism

Shark Sightings a Big Catch for Cape Tourism

AP (July 21, 2014) — A rise in shark sightings along the shores of Chatham, Massachusetts is driving a surge of eager vacationers to the beach town looking to catch a glimpse of a great white. (July 21) Video provided by AP
Powered by NewsLook.com
Spectacular Lightning Storm Hits London

Spectacular Lightning Storm Hits London

AFP (July 19, 2014) — A spectaCular lightning storm struck the UK overnight Friday. Images of lightning strikes over the Shard and Tower Bridge in central London. Duration: 00:23 Video provided by AFP
Powered by NewsLook.com
A Centuries' Old British Tradition Is Far from a Swan Song

A Centuries' Old British Tradition Is Far from a Swan Song

AFP (July 19, 2014) — As if it weren't enough that the Queen is the Sovereign of the UK and 15 other Commonwealth realms, she is also the owner of all Britain's unmarked swans. Duration: 02:18 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins