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SDO Catches Surf Waves on the Sun

Scientists have spotted the iconic surfer's wave rolling through the atmosphere of the sun. This makes for more than just a nice photo-op: the waves hold clues as to how energy moves through that atmosphere, known as the corona.

Since scientists know how these kinds of waves -- initiated by a Kelvin-Helmholtz instability if you're being technical -- disperse energy in the water, they can use this information to better understand the corona. This in turn, may help solve an enduring mystery of why the corona is thousands of times hotter than originally expected.

Kelvin-Helmholtz instabilities occur when two fluids of different densities or different speeds flow by each other. In the case of ocean waves, that's the dense water and the lighter air. As they flow past each other, slight ripples can be quickly amplified into the giant waves loved by surfers. In the case of the solar atmosphere, which is made of a very hot and electrically charged gas called plasma, the two flows come from an expanse of plasma erupting off the sun's surface as it passes by plasma that is not erupting. The difference in flow speeds and densities across this boundary sparks the instability that builds into the waves.

In order to confirm this description, the team developed a computer model to see what takes place in the region. Their model showed that these conditions could indeed lead to giant surfing waves rolling through the corona. Seeing the big waves suggests they can cascade down to smaller forms of turbulence too. Scientists believe that the friction created by turbulence -- the simple rolling of material over and around itself -- could help add heating energy to the corona. The analogy is the way froth at the top of a surfing wave provides friction that will heat up the wave.

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More information on this topic available at:
http://www.nasa.gov/mission_pages/sunearth/news/sun-surfing.html

Short narrated video about Kelvin-Helmholtz waves on the sun.    Short narrated video about Kelvin-Helmholtz waves on the sun.

For complete transcript, click here.
Duration: 3.4 minutes
Available formats:
  1280x720 (59.94 fps) QT         3 GB
  1280x720 (59.94 fps) QT         1 GB
  1280x720 (29.97 fps) QT         348 MB
  960x720 (29.97 fps) MPEG-4   124 MB
  1280x720 (29.97 fps) WMV         107 MB
  1280x720 (30 fps) QT         94 MB
  1280x720 (29.97 fps) MPEG-4   82 MB
  1280x720 (59.94 fps) QT         46 MB
  640x360 (29.97 fps) MPEG-4   39 MB
  640x360 (29.97 fps) MPEG-4   33 MB
  320x240 (29.97 fps) MPEG-4   20 MB
  320x180 (29.97 fps) MPEG-4   14 MB
  1280x720   PNG           1 MB
  960x540 (29.97 fps) WEBM         50 MB
  320x180     PNG           275 KB
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The CME that created the waves.    The CME that created the waves.

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Short URL to This Page:http://svs.gsfc.nasa.gov/goto?10745
Animation Number:10745
Completed:2011-03-24
Video Editor:Scott Wiessinger (UMBC)
Interviewee:Leon Ofman (NASA/GSFC)
Narrator:Chris Smith (HTSI)
Producer:Scott Wiessinger (UMBC)
Scientist:Leon Ofman (NASA/GSFC)
Videographers:Chris Smith (HTSI)
 Scott Wiessinger (UMBC)
 Michelle Williams (UMBC)
 Jennifer A. Shoemaker (UMBC)
Writers:Karen Fox (ASI)
 Scott Wiessinger (UMBC)
Platforms/Sensors/Data Sets:SDO/AIA/193 Filter
 SDO/AIA/211 Filter
 SDO/AIA/171 Filter
Series:Narrated Movies
 SDO - Edited Features
 SDO - Interviews
 Goddard Shorts
Goddard TV Tape:G2011-022 -- SDO Turbulence on the Sun
Please give credit for this item to:
NASA/Goddard Space Flight Center
 
Keywords:
SVS >> CME
SVS >> First Light
SVS >> HDTV
SVS >> Magnetic Fields
SVS >> Plasma
SVS >> Spacecraft
SVS >> Sun
SVS >> Waves
GCMD >> Earth Science >> Sun-earth Interactions
GCMD >> Earth Science >> Sun-earth Interactions >> Solar Activity
SVS >> SDO
SVS >> Edited Feature
SVS >> Solar Dynamics Observatory
SVS >> Space
SVS >> Interview
SVS >> Heliophysics
NASA Science >> Sun
 
 


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Many of our multimedia items use the GCMD keywords. These keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 8.0.0.0.0

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