Featured Research

from universities, journals, and other organizations

Mars constantly loses part of its atmosphere to space due to solar wind

Date:
March 14, 2010
Source:
University of Leicester
Summary:
Space physicists have identified the impact of the Sun on Mars' atmosphere. The scientists report that Mars is constantly losing part of its atmosphere to space. The new study shows that pressure from solar wind pulses is a significant contributor to Mars's atmospheric escape.

Mars is constantly losing part of its atmosphere to space.
Credit: NASA

Space physicists from the University of Leicester are part of an international team that has identified the impact of the Sun on Mars' atmosphere.

Related Articles


Writing in the AGU journal Geophysics Research Letters, the scientists report that Mars is constantly losing part of its atmosphere to space.

The new study shows that pressure from solar wind pulses is a significant contributor to Mars's atmospheric escape.

The researchers analysed solar wind data and satellite observations that track the flux of heavy ions leaving Mars's atmosphere. The authors found that Mars's atmosphere does not drift away at a steady pace; instead, atmospheric escape occurs in bursts.

The researchers related those bursts of atmospheric loss to solar events known as corotating interaction regions (CIRs). CIRs form when regions of fast solar wind encounter slower solar wind, creating a high-pressure pulse. When these CIR pulses pass by Mars, they can drive away particles from Mars's atmosphere.

The authors found that during times when these CIRs occurred, the outflow of atmospheric particles from Mars was about 2.5 times the outflow when these events were not occurring. Furthermore, about one third of the material lost from Mars into space is lost during the impact and passing of CIRs.

The study should help scientists better understand the evolution of Mars's atmosphere.

Professor Mark Lester, Head of the Department of Physics and Astronomy at the University of Leicester said: "The main reason it happens at Mars and not at Earth is the lack of a magnetic field produced by the planet, which protects the atmosphere at Earth.

"One other aspect of this work is that the observations were made during a very quiet period in the eleven year solar cycle and so we would expect the effect of these and other large scale disturbances to be higher at other times in the solar cycle."

Leicester's role in the study was to analyse the data using ideas that academic researchers had from discussions within the Radio and Space Plasma Physics Research Group.


Story Source:

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


Journal Reference:

  1. Edberg et al. Pumping out the atmosphere of Mars through solar wind pressure pulses. Geophysical Research Letters, 2010; 37 (3): L03107 DOI: 10.1029/2009GL041814

Cite This Page:

University of Leicester. "Mars constantly loses part of its atmosphere to space due to solar wind." ScienceDaily. ScienceDaily, 14 March 2010. <www.sciencedaily.com/releases/2010/03/100312133725.htm>.
University of Leicester. (2010, March 14). Mars constantly loses part of its atmosphere to space due to solar wind. ScienceDaily. Retrieved January 27, 2015 from www.sciencedaily.com/releases/2010/03/100312133725.htm
University of Leicester. "Mars constantly loses part of its atmosphere to space due to solar wind." ScienceDaily. www.sciencedaily.com/releases/2010/03/100312133725.htm (accessed January 27, 2015).

Share This


More From ScienceDaily



More Space & Time News

Tuesday, January 27, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Water Fleas Prepare for Space Voyage

Water Fleas Prepare for Space Voyage

Reuters - Innovations Video Online (Jan. 26, 2015) Scientists are preparing a group of water fleas for a unique voyage into space. The aquatic crustaceans, known as Daphnia, can be used as a miniature model for biomedical research, and their reproductive and swimming behaviour will be tested for signs of stress while on board the International Space Station. Jim Drury went to meet the team. Video provided by Reuters
Powered by NewsLook.com
Mars Rover Opportunity Celebrates 11-Year Anniversary

Mars Rover Opportunity Celebrates 11-Year Anniversary

Rumble (Jan. 26, 2015) Eleven years ago NASA&apos;s Opportunity rover touched down on Mars for what was only supposed to be a 90-day mission. Since then it has traveled 25.9 miles (41.7 kilometers), further than any other off-Earth surface vehicle has ever driven. Credit to &apos;NASA&apos;. Video provided by Rumble
Powered by NewsLook.com
NASA's On Course To Take Pluto's Best Photo Ever

NASA's On Course To Take Pluto's Best Photo Ever

Newsy (Jan. 25, 2015) NASA&apos;s New Horizons probe is en route to snap a picture of Pluto this summer, but making sure it doesn&apos;t miss its one chance to do so starts now. Video provided by Newsy
Powered by NewsLook.com
Rosetta Captures Stunning Views, Diverse Data Of Comet 67P

Rosetta Captures Stunning Views, Diverse Data Of Comet 67P

Newsy (Jan. 23, 2015) The first images of the European Space Agency&apos;s Rosetta probe comet orbit could provide clues about its origin and how it got its unique shape. 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


Space & Time

Matter & Energy

Computers & Math

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