Navigation Links
Surprisingly rapid changes in the Earth's core discovered
Date:7/7/2008

In a recent paper published in Nature Geoscience (*), the geophysicist Mioara MANDEA from the GFZ German Research Centre for Geosciences, Potsdam and her Danish colleague Nils OLSEN from the National Space Institute/DTU Copenhagen, have shown that motions in the fluid in the Earths core are changing surprisingly fast, and that this, in turn, effects the magnetic field of our Planet.

The very precise measurements of the Earths magnetic field delivered by the geosatellite CHAMP combined with rsted satellite data and ground observations over the past nine years, have made it possible to reveal what is happening at 3000 km under our feet. Indeed, for the first time, Nils Olsen and Mioara Mandea have computed a model for the flow at the top of the Earths core that fits with the recent rapid changes in the magnetic field, and is also in agreement with the changes in the Length-of-Day variation. This core flow is rather localized in space, and involves rapid variations, almost sudden, over only a few months a remarkably short time interval compared with the respectable age of our Planet or even with the time of the last magnetic field reversal, some 780000 years ago.

Scientists from the Helmholtz Centre GFZ and other institutions are currently involved in the ESA Swarm mission, which will follow on the CHAMP achievements. The Swarm constellation consists of three CHAMP-type satellites, which will measure the Earths magnetic field even more accurately than before.


'/>"/>

Contact: Franz Ossing
ossing@gfz-potsdam.de
49-331-288-1040
Helmholtz Association of German Research Centres
Source:Eurekalert

Page: 1

Related biology news :

1. European Union forests expanding, absorbing carbon at surprisingly high rate: study
2. Exploited fish make rapid comeback in worlds largest no-take marine reserve network
3. Birds migrate earlier, but some may be left behind as the climate warms rapidly
4. Researchers document rapid, dramatic reverse evolution in the threespine stickleback fish
5. Arbor Vita rapid H5N1 flu diagnostic presented at ICEID meeting
6. New decontamination system kills anthrax rapidly without lingering effects
7. Selexis Announces Advanced Approach to Maximize Power of Genetic Elements for Rapid Development of High Performance Cell Lines
8. Air monitoring helps anticipate possible ecosystem changes
9. Thinking ahead: Bacteria anticipate coming changes in their environment
10. Woolly-mammoth gene study changes extinction theory
11. Mass. General study shows how exercise changes structure and function of heart
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/30/2017)... Trends, opportunities and forecast in this market ... (fingerprint, AFIS, iris recognition, facial recognition, hand geometry, vein ... use industry (government and law enforcement, commercial and retail, ... others), and by region ( North America ... Pacific , and the Rest of the World) ...
(Date:3/27/2017)... CENTRE, N.Y. , March 27, 2017 /PRNewswire-USNewswire/ ... Healthcare Information and Management Systems Society (HIMSS) Analytics ... Outpatient EMR Adoption Model sm . In addition, ... 12% of U.S. hospitals using an electronic medical ... CHS for its high level of EMR usage ...
(Date:3/23/2017)... , March 23, 2017 The report "Gesture Recognition ... Biometric), Industry, and Geography - Global Forecast to 2022", published by MarketsandMarkets, the ... a CAGR of 29.63% between 2017 and 2022. ... ... ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... October 10, 2017 , ... Dr. Bob Harman, founder and CEO of ... Rotary Club. The event entitled “Stem Cells and Their Regenerative Powers,” ... Dr. Harman, DVM, MPVM was joined by two human doctors: Peter B. Hanson, ...
(Date:10/10/2017)... CRUZ, Calif. , Oct. 10, 2017 ... grant from the NIH to develop RealSeq®-SC (Single Cell), ... kit for profiling small RNAs (including microRNAs) from single ... Analysis Program highlights the need to accelerate development of ... "New techniques for measuring ...
(Date:10/10/2017)... ... October 10, 2017 , ... The Pittcon Program Committee ... honoring scientists who have made outstanding contributions to analytical chemistry and applied ... the world’s leading conference and exposition for laboratory science, which will be held ...
(Date:10/9/2017)... ... October 09, 2017 , ... The award-winning American Farmer ... first quarter 2018. American Farmer airs Tuesdays at 8:30aET on RFD-TV. , With ... with the challenge of how to continue to feed a growing nation. At the ...
Breaking Biology Technology: