From Tim.Fuller-Rowell@noaa.gov Wed Mar 9 11:17:45 2005 Return-Path: Received: from cripplecreek.sec.noaa.gov (cripplecreek.sec.noaa.gov [140.172.225.11]) by sv01.scs.gmu.edu (8.13.1/8.12.8) with ESMTP id j29GHiJi019280 for ; Wed, 9 Mar 2005 11:17:45 -0500 Received: from noaa.gov ([140.172.224.14]) by cripplecreek.sec.noaa.gov (Netscape Messaging Server 4.15) with ESMTP id ID3ELE00.RA9 for ; Wed, 9 Mar 2005 09:17:38 -0700 Message-ID: <422F2268.2060305@noaa.gov> Date: Wed, 09 Mar 2005 09:20:56 -0700 From: "Tim Fuller-Rowell" Reply-To: tim.fuller-rowell@noaa.gov User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Jie Zhang Subject: Re: WG2/3 science questions References: <422363C8.9080209@noaa.gov> <422CC49A.2000008@noaa.gov> <1935.69.138.19.47.1110303092.squirrel@mail.scs.gmu.edu> In-Reply-To: <1935.69.138.19.47.1110303092.squirrel@mail.scs.gmu.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Status: O X-UID: 25520 Content-Length: 2508 X-Keywords: X-Evolution-Source: imap://jiez@mail.scs.gmu.edu/ Content-Transfer-Encoding: 8bit Jie, The main overarching science question in WG3 is: "How does the TEC respond to geomagnetic storms, and what are the mechanisms that control that response." There are a series of sub-questions suggested to focus the discussion: 1. What happens in the first 60 minutes of a storm? - penetration electric fields - expansion of the convection pattern - start of heating and momentum dissipation, and upwelling at high latitudes - start of wave propagation - start of neutral composition changes 2. Does the storm-enhanced density (SED) feature at midlatitude develop from the sub-auroral polarization stream (SAPS), or are there other processes involved? 3. How does the neutral wind impact the development of the storm, and what is the relative importance between penetration and dynamo electric fields in driving the response? 4. How is the plasma "bulge" created, or transported, to high mid-latitude (50 magnetic latitude). (It is this bulge of plasma that apparently is transported by the SAPS to produce a SED) 5. Are models able to follow the response and recovery of O/N2 over the duration of the storm, and how strong is its control of the ionospheric response. 6. What causes the strong longitude dependence in the TEC response, and how does the UT time sequence of the storm affect the different longitude sectors. Thanks, Tim and John Jie Zhang wrote: >Tim, > >Could you please send me the list of science questions for WG3 only, >preferably in .doc format? Thanks. -Jie > > > > >>WG2/3 joint session science questions (Tuesday AM): >> >>1. What is controlling the response of the penetration electric field to >>the expansion of >>the convective electric field and the degree of shielding/overshielding. >> - dependence on temporal time-scale of forcing >> - pre-conditioning in the inner magnetosphere/ring current >> - magnetic field configuration >> - longitude dependence in ionospheric conductivity >> >>2. When and where does the ring current produce SAPS and what is their >>relationship >>to SEDS and plumes. >> - dependence on MLT and latitude >> - many others >> >>3. How does the magnetospheric convection pattern expand. >> - evolution from one state to another >> - erosion of plasmasphere or equatorward transport >> - refilling >> >>4. Is there a "real" longitude dependence. >> - separating the difference between UT/long and a "real" longitude >>dependence >> - is there a preferred UT start time of storm? >> >> >> > > >