Poleward‐moving HF radar flow bursts in the cusp: Transient changes in flow speed or direction?
Chisham, G.; Pinnock, M.; Rodger, A.S.. 2000 Poleward‐moving HF radar flow bursts in the cusp: Transient changes in flow speed or direction? Geophysical Research Letters, 27 (7). 919-922. 10.1029/1999GL010760Full text not available from this repository. (Request a copy)
Poleward‐moving line‐of‐sight velocity “flow bursts” have been observed in the cusp by two southern hemisphere SuperDARN HF radars with overlapping fields‐of‐view. This has allowed the estimation of unambiguous two‐dimensional velocity vectors in the vicinity of the “flow bursts”. Rather than showing enhancements in the flow magnitude, the velocity vectors suggest that the line‐of‐sight velocity enhancements are a result of a change in the direction of the flow associated with latitudinal motion of the convection reversal boundary. These observations may have important implications for understanding the ionospheric footprint of flux transfer events, and also illustrate that caution is needed when interpreting line‐of‐sight velocity data from single radars.
|Item Type:||Publication - Article|
|Digital Object Identifier (DOI):||10.1029/1999GL010760|
|Programmes:||BAS Programmes > Pre 2000 programme|
|Date made live:||16 Nov 2012 11:15|
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