Meeting abstract

Solar Wind 9, Nantucket, 5-9 October 1998

Abstract:
Small scale structures in high speed streams reflect conditions within the coronal holes from which they originate, albeit affected by dynamical evolution. Ulysses has spent several years within flows from the Sun's polar coronal holes: the resulting magnetic field and plasma data sets contain a remarkable diversity of structures on a variety of scales. Data between 1995 day 110 and 240, during which time Ulysses travelled from 1.4 to 2.2 AU and 35 to 77 degrees North, were analysed. A small number of clear examples of structures on spacecraft scales between 1 and 12 hours were considered in detail. Bulk field and plasma parameters are presented, as well as characteristics of the fluctuations in these regions. An attempt has been made to classify the structures with a view to relating their properties to both their source and subsequent development.