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 September 2, 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 September 2, 2014).

Share This




More Earth & Climate News

Tuesday, September 2, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Thousands of Fish Dead in Mexico Lake

Raw: Thousands of Fish Dead in Mexico Lake

AP (Sep. 2, 2014) — Over 53 tons of rotting fish have been removed from Lake Cajititlan in western Jalisco state. Authorities say that the thousands of fish did not die of natural causes. (Sep. 2) Video provided by AP
Powered by NewsLook.com
Raw: Iceland Volcano Spewing Smoke

Raw: Iceland Volcano Spewing Smoke

AP (Sep. 2, 2014) — The alert warning for the area surrounding Iceland's Bardarbunga volcano was kept at orange on Tuesday, indicating increased unrest with greater potential for an eruption. Smoke is spewing from the volcano, and lava is spouting nearby. (Sept. 2) Video provided by AP
Powered by NewsLook.com
U.N. Says Ebola Travel Restrictions Will Cause Food Shortage

U.N. Says Ebola Travel Restrictions Will Cause Food Shortage

Newsy (Sep. 2, 2014) — The U.N. says the problem is two-fold — quarantine zones and travel restrictions are limiting the movement of both people and food. Video provided by Newsy
Powered by NewsLook.com
Halliburton Reaches $1B Gulf Spill Settlement

Halliburton Reaches $1B Gulf Spill Settlement

AP (Sep. 2, 2014) — Halliburton's agreement to pay more than $1 billion to settle numerous claims involving the 2010 BP oil spill could be a way to diminish years of costly litigation. A federal judge still has to approve the settlement. (Sept. 2) Video provided by AP
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