WG1 + WG2 Joint Session

Science Topics:

Radiation belt:

1. Which solar wind drivers are most geoeffective at radiation belt electron enhancements: high speed solar wind streams, CIRs, CMEs including magnetic cloud and shock categories? While we may know the general answer, we do not know in detail why some CME events, the focus of this CDAW, are more geoeffective for electrons than others.

Sub-question: How important is pre-conditioning of the magnetosphere? e.g. elapsed time since previous storm, plasma sheet density, etc.? WG1 & 4 overlap. Hudson, Baker

2. What solar drivers/solar wind conditions lead to electron flux enhancements as well as losses, esp. the deep dropouts (to L2 or so) that appear associated with large storms. What are the processes responsible for each? Webb and Braughtigam, dropouts

3. What are solar wind conditions leading to cutoff reduction and trapping of Solar Energetic Particles, and solar wind plus magnetospheric conditions leading to loss? Examples are Nov. 6 and Nov. 24 2001 SEP trapping events of > 12 MeV protons (and heavy ions) in the electron slot region L=2.5 - 3, and sudden loss Nov. 20 2003. WG1 overlap. Hudson, Richardson

Vassiliades

Ring current:

4. What is the relative importance of the solar-wind driven enhanced magnetospheric convection electric field, variations in the plasma sheet population, and the penetration electric field (SAPs) on storm-time ring current development? WG1 & WG3 overlap.

Wygant E-fields, Siscoe sw density and plasmasheet source of ring current

WG2 events that WG1 may be interested in:

#27 16 July 2000 Good CAMMICE in im; sq # 5, WG3 overlap

#28-29 11-12 Aug 2000 Good CAMMICE in im, CEASE, HENA; no

SEP, enhancement of energetic e-. sq #6

#33 29 Oct 2000 Good Polar/CAMMICE, HENA, EUV; sq #6

#45 (22 Oct 2001) Ring current, good Polar EFI

#47 6 Nov 2001 CLUSTER in p.s., SEP trapping, rb model results

# 37 31 Mar 2001 Superstorm

# 48 24 Nov 2001 SEP trapping, rb and ring current model results

*#50-51 18-20 Apr 2002 Good CAMMICE in p.s., EUV, HENA, CLUSTER in i. m. in rec. phase; sq #5, WG3 overlap

#58 1 Oct 2002 Good CEASE, HENA, CLUSTER in i. m. in

rec. phase; no SEP, enhancement of energetic el

*#68-69 30 Oct 2003 Good CEASE, EUV; SEP, CLUSTER in

recovery phase; Superstorm, sq # 5 WG3 overlap

*#70 20 Nov 2003 Good EUV, CLUSTER in ps; largest |Dst|,

abrupt deep loss of energetic e-, sq # 5, WG3 overlap

*#76 27 July 2004 Good CEASE, CLUSTER in ps; no SEP

*#78/79______ 08 Nov 2004 Good CEASE, ______________________

The boldfaced storms indicate storms in which 2 or more people have expressed interest in:

im= inner magnetosphere, ps = plasma sheet, rb = radiation belts, sq = science question