On the contrary, if for example the speed expands, the new digital career and reconnection rate increase as well

• Mention.Runs: step one = The brand new noncoupled SWMF (v20140611); 2 = an equivalent noncoupled SWMF which have ionospheric conductivity out-of ten S instead of five S; step three = a similar model having an extremely highest ionospheric conductivity a hundred S; cuatro = a similar design that have a great dipole tip 31° in xz airplane; 5 = the SWMF SIMI (interior magnetosphere-ionosphere) v20180525; six = new LFM-Blend. What “Density” and you can “Velocity” imply that merely thickness and you will velocity was indeed enhanced, “Northward” and you may “Southward” imply the brand new IMF positioning.

Both the density and you may acceleration jumps try nonstationary formations just like the each other of those do not meet up with the Rankine-Hugoniot relations

We recommend that the difference regarding magnetospheric response to this new thickness and acceleration expands was explained by the magnetopause magnetized reconnection. If your thickness develops as well as the acceleration is lingering, even for an excellent southward IMF, the solar power snap electric field continues to be the same as well as the magnetopause reconnection price perform are different insignificantly. The fresh new intensification regarding the newest system weakens the fresh new magnetospheric magnetic industry and actions the newest dayside magnetopause earthward, in the same way given that occurs in the case out-of southward IMF turning (Sibeck, 1994 ).

Therefore, which raises the magnetospheric-ionospheric currents, in particular the location step one current

I show this new y part of this new magnetosheath digital profession into the the fresh new inflow region (at the sunward border of the magnetopause newest level), sheer reconnection rate, the fresh new ratio of the inflow acceleration on the magnetosheath Alfven speed, while the reconnection speed stabilized to the overall solar power breeze electronic industry when you look at the Figure S2 in the support recommendations. The fresh new reconnection speed might have been computed at boundaries of the magnetopause current covering because informed me for the Cassak and Shay ( 2007 ), Borovsky et al. ( 2008 ), and you may Borovsky and you can Birn ( 2014 ). (Contour S1 additionally the associated reason on the help pointers offer additional information on the process.) We find your difference in the new magnetosheath electric career and you can reconnection rate between the two operates having occurrence and you may acceleration develops resembles the real difference regarding the solar piece of cake electric field, and also for the situation to the enhanced velocity the absolute reconnection price (additionally the Ey electronic job) about inflow part expands as time passes and also at the conclusion off simulator work with will get dos.five times larger than the absolute reconnection rate (or Ey) toward situation toward increased density. Although not, the fresh new reconnection cost normalized toward solar piece gleeden of cake digital field is actually nearly an identical in works and you can a little disappear in the runs from about 0.55 so you’re able to 0.cuatro. This type of thinking is actually alongside men and women received from inside the simulator A great when you look at the Borovsky ainsi que al. ( 2008 ).

Highest reconnection price intensifies the region step 1 latest and advances the mix polar limit prospective (CPCP). Profile S3 suggests temporary differences of one’s CPCP within the four runs. For both the northward and you may southward IMF, new CPCP grows shorter regarding acceleration boost, however, again the difference will get nice on the southward IMF. The brand new CPCP appears to are still mainly lower than a beneficial saturation peak (Hill et al., 1976 ; Siscoe ainsi que al., 2002 ), though it was nearby the saturation to have a biggest CPCP used in which performs (southward IMF, high-velocity). Anyhow, we really do not observe the effectation of saturation into magnetopause area, particularly, while considering the brand new dependencies inside Contour 3.

Brand new develops in the CPCP within the Profile S3 is actually followed by overshoots and you can undershoots, especially in Operates dos and you will 4 on velocity raise. The reason ones transients was explained because of the pursuing the. In both cases, the total pressure increases through the discontinuities nevertheless the boost in this new acceleration quickly causes an increase in the fresh density when you’re the dwelling propagates on the solar power snap regarding inflow line toward bend treat. That it ic pressure around the magnetopause. We have checked a possible upsurge in the fresh thickness near the subsolar bend amaze inside Operates 2 and you may 4 and found you to definitely the brand new solar piece of cake thickness extremely increases at the jumps during the velocity, but only at multiple basic jumps. In the event your solar power piece of cake velocity try reduced, brand new propagation date on inflow border into bend amaze try much time therefore, the occurrence possess enough time to accumulate. However, the fresh new thickness improvement drops lower than step 1% towards speed more than five hundred km/s. Because feeling is negligible most of the time, we think this will not dictate brand new hills within the Shape 3. Along with, the new develops in the solar power cinch velocity results in most other discontinuities on the magnetosheath and you can magnetosphere since men and women submit and you may shown compressional swells listed above. In any event, we just use quasi-steady state values adopting the transients inside our investigation.