- Notice.Runs: 1 = This new noncoupled SWMF (vdos0140611); 2 = an identical noncoupled SWMF which have ionospheric conductivity off 10 S rather of 5 S; step 3 = a similar design having an incredibly highest ionospheric conductivity one hundred S; cuatro = an identical model that have a beneficial dipole tilt 30° inside the xz airplane; 5 = the brand new SWMF SIMI (inner magnetosphere-ionosphere) v20180525; six = the latest LFM-Combine. The text “Density” and “Velocity” imply that merely thickness and you can velocity was in fact enhanced, “Northward” and “Southward” mean the IMF orientation.
Both thickness and you can speed jumps is actually nonstationary formations since both of these don’t meet with the Rankine-Hugoniot relations
I advise that the real difference in the magnetospheric response to the newest density and you will speed grows is actually explained because of the magnetopause magnetized reconnection. If the thickness increases therefore the velocity is lingering, even for an effective southward IMF, the newest solar power cinch electronic career remains the exact same and magnetopause reconnection rate create will vary insignificantly. The brand new intensification for the latest program weakens this new magnetospheric magnetized field and you can actions the newest dayside magnetopause earthward, in the same manner as the takes place in your situation regarding southward IMF turning (Sibeck, 1994 ).
Consequently, this raises the magnetospheric-ionospheric currents, specifically the region step one current
We inform you the new y component of the fresh new magnetosheath electronic industry in the fresh inflow area (on sunward boundary of magnetopause newest covering), sheer reconnection rates, the newest ratio of your own inflow speed towards magnetosheath Alfven price, as well as the reconnection price stabilized for the overall solar power snap digital profession into the Profile S2 regarding support information. This new reconnection rates has been determined at limits of your magnetopause latest layer just like the explained during the Cassak and Shay ( 2007 ), Borovsky et al. ( 2008 ), and you may Borovsky and you can Birn ( 2014 ). (Contour S1 plus the associated need throughout the supporting recommendations give more information on the process.) We discover the difference between the magnetosheath electric profession and reconnection rates among them http://www.datingranking.net/pl/heated-affairs-recenzja works that have density and acceleration increases is comparable to the difference about solar power breeze electric occupation, and also for the circumstances towards the enhanced speed the absolute reconnection price (as well as the Ey digital industry) from the inflow part expands as time passes and at the end out of simulator work with becomes 2.5 times larger than absolutely the reconnection price (or Ey) for the situation to the enhanced thickness. But not, the fresh reconnection costs stabilized to the solar power wind digital industry are nearly an identical both in works and you can a little drop off within the runs from about 0.55 to 0.4. Such opinions is near to those individuals gotten during the simulator A good within the Borovsky ainsi que al. ( 2008 ).
Higher reconnection rates intensifies the location step one current and you can boosts the cross polar cover prospective (CPCP). Contour S3 suggests temporal variations of your own CPCP inside four runs. For both the northward and southward IMF, the new CPCP grows reduced in the case of speed improve, however, once again the difference gets large towards southward IMF. The brand new CPCP generally seems to continue to be mostly below an effective saturation height (Hill ainsi que al., 1976 ; Siscoe mais aussi al., 2002 ), although it could be close to the saturation to own a prominent CPCP utilized in which works (southward IMF, high-velocity). In any event, we really do not observe the aftereffect of saturation to your magnetopause venue, for example, while deciding the newest dependencies from inside the Contour 3.
The increases from the CPCP in the Figure S3 is actually followed by overshoots and you will undershoots, particularly in Runs dos and you can 4 towards velocity improve. The reason of them transients might be said from the after the. In both cases, the pressure grows from discontinuities nevertheless boost in the velocity instantly contributes to a boost in this new density if you are the dwelling propagates throughout the solar piece of cake regarding inflow line towards the bow shock. That it ic pressure around the magnetopause. We have checked a potential increase in the newest density nearby the subsolar bow shock within the Operates dos and you will 4 and found you to the newest solar wind occurrence most increases in the jumps into the acceleration, but at several earliest leaps. If your solar piece of cake velocity are reduced, the new propagation go out regarding the inflow border to the ribbon wonder is long so the thickness possess plenty of time to pile up. But not, the brand new density improvement drops below 1% to your acceleration more than five hundred kilometer/s. Because impact try negligible in most cases, we think it doesn’t dictate new mountains in Contour 3. Besides, the new grows about solar wind velocity results in other discontinuities about magnetosheath and magnetosphere due to the fact men and women pass and mirrored compressional surf mentioned above. Anyway, i use only quasi-steady-state philosophy following the transients within studies.
