Featured Research

from universities, journals, and other organizations

Understanding Atlantic and Pacific jet stream fluctuations

Date:
June 5, 2012
Source:
Uni Research
Summary:
A recent study demonstrates the link between observed fluctuations of atmospheric jet streams and the theoretical concepts that describe why jet streams exist. Atmospheric jet streams are fast-flowing currents of air found approximately 10 km above sea level in the extratropical regions of both hemispheres. Because these jets influence regional weather patterns, there is great interest in understanding the factors that control their path, their strength and variations in both. 

A recent study by Bjerknes Centre scientists demonstrates the link between observed fluctuations of atmospheric jet streams and the theoretical concepts that describe why jet streams exist.

Atmospheric jet streams are fast-flowing currents of air found approximately 10 km above sea level in the extratropical regions of both hemispheres. Because these jets influence regional weather patterns, there is great interest in understanding the factors that control their path, their strength and variations in both.

Theory tells us two different dynamical processes can give rise to such jets: heating in the tropics (thermal driving) and storm activity in the the midlatitudes (eddy driving). However, how important each process is in the real world is not well known.

Theory and real-world jets

A new study by researchers at the Bjerknes Centre for Climate Research establishes a clearer link between theory and the real-world jets by identifying how variations in the driving processes affect the jets.

Eddy driving, which creates north-south shifts in the jet, is found to be important for both the Atlantic and Pacific jets; thermal driving, which creates changes in jet strength, is found to be equally important for the Pacific jet.

The results of this study provide an intuitive dynamical description of atmospheric variability in terms of actual fluctuations of the jets. In addition, they have the potential to help evaluate how the jets will respond to climate changes such as global warming.


Story Source:

The above story is based on materials provided by Uni Research. Note: Materials may be edited for content and length.


Journal Reference:

  1. Camille Li, Justin J. Wettstein. Thermally Driven and Eddy-Driven Jet Variability in Reanalysis*. Journal of Climate, 2012; 25 (5): 1587 DOI: 10.1175/JCLI-D-11-00145.1

Cite This Page:

Uni Research. "Understanding Atlantic and Pacific jet stream fluctuations." ScienceDaily. ScienceDaily, 5 June 2012. <www.sciencedaily.com/releases/2012/06/120605075201.htm>.
Uni Research. (2012, June 5). Understanding Atlantic and Pacific jet stream fluctuations. ScienceDaily. Retrieved October 22, 2014 from www.sciencedaily.com/releases/2012/06/120605075201.htm
Uni Research. "Understanding Atlantic and Pacific jet stream fluctuations." ScienceDaily. www.sciencedaily.com/releases/2012/06/120605075201.htm (accessed October 22, 2014).

Share This



More Earth & Climate News

Wednesday, October 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

San Diego Zoo's White Rhinos Provide Hope for the Critically Endangered Species

San Diego Zoo's White Rhinos Provide Hope for the Critically Endangered Species

Reuters - Light News Video Online (Oct. 22, 2014) — The pair of rare white northern rhinos bring hope for their species as only six remain in the world. Elly Park reports. Video provided by Reuters
Powered by NewsLook.com
Trick-or-Treating Banned Because of Polar Bears

Trick-or-Treating Banned Because of Polar Bears

Buzz60 (Oct. 21, 2014) — Mother Nature is pulling a trick on the kids of Arviat, Canada. As Mara Montalbano (@maramontalbano) tells us, the effects of global warming caused the town to ban trick-or-treating this Halloween. Video provided by Buzz60
Powered by NewsLook.com
Traditional Farming Methods Gaining Ground in Mali

Traditional Farming Methods Gaining Ground in Mali

AFP (Oct. 20, 2014) — He is leading a one man agricultural revolution in Mali - Oumar Diatabe uses traditional farming methods to get the most out of his land and is teaching others across the country how to do the same. Duration: 01:44 Video provided by AFP
Powered by NewsLook.com
How Detroit's Money Woes Led To U.N.-Condemned Water Cutoffs

How Detroit's Money Woes Led To U.N.-Condemned Water Cutoffs

Newsy (Oct. 20, 2014) — The United Nations says water is a human right, but should it be free? Detroit has cut off water to residents who can't pay, and the U.N. isn't happy. Video provided by Newsy
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:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

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