- Note.Runs: 1 = The brand new noncoupled SWMF (v20140611); dos = an identical noncoupled SWMF with ionospheric conductivity out-of 10 S as an alternative of 5 S; 3 = an identical design which have a very higher ionospheric conductivity one hundred S; cuatro = a comparable design having an excellent dipole tilt 31° inside xz airplane; 5 = the SWMF SIMI (interior magnetosphere-ionosphere) v20180525; six = the newest LFM-Mix. What “Density” and “Velocity” signify only density and you will acceleration were increased, “Northward” and you may “Southward” imply the newest IMF orientation.
The density and acceleration jumps try nonstationary structures as the one another of these don’t meet the Rankine-Hugoniot relationships
I advise that the real difference on magnetospheric response to new thickness and you may speed develops was said because of the magnetopause magnetized reconnection. If your density grows in addition to acceleration is constant, even for a great southward IMF, the fresh new solar power snap digital field continues to be the exact same and magnetopause reconnection rates manage differ insignificantly. The brand new intensification associated with the latest program weakens the fresh new magnetospheric magnetized industry and you may motions the dayside magnetopause earthward, in the sense since takes place in the fact of southward IMF turning (Sibeck, 1994 ).
Consequently, which enhances the magnetospheric-ionospheric currents, in particular the location step one newest
We show this new y component https://datingranking.net/pl/girlsdateforfree-recenzja of the magnetosheath electric field from inside the the fresh inflow area (from the sunward line of your own magnetopause latest layer), natural reconnection rates, the latest ratio of your own inflow acceleration into the magnetosheath Alfven rates, additionally the reconnection speed normalized towards the overall solar power snap electronic career into the Figure S2 on support recommendations. This new reconnection price might have been determined on limitations of the magnetopause most recent coating as informed me inside Cassak and you can Shay ( 2007 ), Borovsky mais aussi al. ( 2008 ), and Borovsky and you will Birn ( 2014 ). (Figure S1 plus the associated factor throughout the support information give additional information on the process.) We discover your difference between the new magnetosheath electronic occupation and you can reconnection price between the two works with density and you will speed increases resembles the difference regarding solar wind electric job, and for the instance for the improved speed the absolute reconnection speed (plus the Ey electronic career) about inflow area expands eventually and also at the finish of simulation work at becomes 2.five times bigger than the absolute reconnection speed (or Ey) towards the instance towards the improved occurrence. However, the fresh reconnection pricing normalized with the solar power wind electric field are nearly a comparable in both runs and you may some drop off from inside the works from around 0.55 in order to 0.4. Such values is actually close to the individuals obtained within the simulator A inside Borovsky et al. ( 2008 ).
Large reconnection rates intensifies the location step 1 most recent and escalates the get across polar cover possible (CPCP). Contour S3 suggests temporal distinctions of your CPCP during the four works. For the northward and you can southward IMF, the CPCP develops less regarding velocity boost, however, again the real difference becomes ample on the southward IMF. The new CPCP appears to are nevertheless generally lower than good saturation top (Mountain ainsi que al., 1976 ; Siscoe mais aussi al., 2002 ), although it will be near the saturation getting a largest CPCP included in so it performs (southward IMF, high velocity). Anyhow, we really do not observe the effect of saturation on the magnetopause place, for example, while considering the newest dependencies when you look at the Profile 3.
The newest grows on CPCP inside the Contour S3 is actually followed by overshoots and you will undershoots, especially in Runs 2 and you will cuatro towards velocity boost. The reason of them transients will be informed me of the after the. In the two cases, the total pressure grows from the discontinuities nevertheless escalation in the fresh speed quickly causes a boost in the latest occurrence while the dwelling propagates on the solar power cinch from the inflow edge into the ribbon treat. That it ic pressure nearby the magnetopause. I have examined a potential escalation in new occurrence near the subsolar bend surprise during the Works dos and you will 4 and discovered one the solar power cinch occurrence most increases in the leaps in speed, but only at several earliest leaps. If the solar breeze speed are low, the newest propagation time in the inflow boundary with the bow surprise try enough time therefore, the thickness enjoys plenty of time to pile up. But not, new occurrence enhancement falls lower than step one% to the acceleration greater than five hundred kilometres/s. Because effect try minimal usually, we believe this will not determine brand new hills inside Shape step 3. In addition to, the fresh new grows regarding solar snap velocity results in almost every other discontinuities regarding the magnetosheath and you may magnetosphere because those people give and you may reflected compressional surf listed above. Anyhow, we just use quasi-steady-state viewpoints adopting the transients within analysis.