Journal article
Large Alfvén wave power in the plasma sheet boundary layer during the expansion phase of substorms
Geophysical research letters, Vol.27(19), pp.3169-3172
2000
DOI: 10.1029/2000GL000127
Abstract
Observations by the Polar satellite of large Poynting flux in the plasma sheet boundary layer at geocentric distances of 4 to 6 RE and between 22 and 3 hrs magnetic local time were correlated with H-bay signatures from ground magnetometer records. We provide evidence that large Poynting fluxes occur during the substorm expansion phase. The Poynting fluxes exceeded 1 ergs/cm²s (125 ergs/cm²s when mapped to 100 km), were dominantly directed toward the ionosphere, and were associated with Alfvén waves. These observations demonstrate the importance of Alfvén wave power as a means of energy transport from the distant magnetotail to the ionosphere during the most dynamic phase of substorms.
Details
- Title: Subtitle
- Large Alfvén wave power in the plasma sheet boundary layer during the expansion phase of substorms
- Creators
- A Keiling - University of MinnesotaJ. R Wygant - University of MinnesotaC Cattell - University of MinnesotaM Temerin - University of California, BerkeleyF. S Mozer - University of California, BerkeleyC. A Kletzing - University of IowaJ Scudder - University of IowaC. T Russell - University of California, Los AngelesW Lotko - Dartmouth CollegeA. V Streltsov - Dartmouth College
- Resource Type
- Journal article
- Publication Details
- Geophysical research letters, Vol.27(19), pp.3169-3172
- Publisher
- American Geophysical Union
- DOI
- 10.1029/2000GL000127
- ISSN
- 0094-8276
- eISSN
- 1944-8007
- Language
- English
- Date published
- 2000
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199720902771
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