Kelvin-Helmholtz Waves in the Earth's Magnetotail

Details Kelvin-Helmholtz Waves in the Earth's Magnetotail Kelvin-Helmholtz Waves in the Earth's Magnetotail

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm24a..08v&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SM24A-08

Physics

0654 Plasmas, 2744 Magnetotail, 2752 Mhd Waves And Instabilities (2149, 6050, 7836), 2764 Plasma Sheet

Scientific paper

On August 14 2004, there was a conjunction between Cluster, DoubleStar TC1 and the AARI ground magnetometer stations. TC1 first enters into the plasma sheet and observes a flow channel with little flow, and 29 minutes later Cluster enters this flow channel measuring strong Earthward flow. At the boundary of the flow channel, while Cluster enters, there are large scale oscillations with a period near 5 minutes. Timing analysis shows that the waves travel at approximately half the flow velocity, an indication for Kelvin-Helmholtz waves. As Cluster moves deeper into the flow channel, the amplitude of the waves increases, which is in agreement with KHI on a bounded flow channel. We will discuss the growth rate of the waves, which will give us insight into the source location of the flow (distance of the reconnection region down the tail from Cluster), and the flow braking (TC1 observing very little flow, being ~ 5 RE Earthward of Cluster).

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