- Mention.Runs: step one = The new noncoupled SWMF (vdos0140611); 2 = an identical noncoupled SWMF that have ionospheric conductivity from ten S as an alternative of 5 S; 3 = an equivalent model which have an extremely large ionospheric conductivity 100 S; cuatro = an identical design which have an effective dipole tilt 29° inside the xz planes; 5 = the SWMF SIMI (internal magnetosphere-ionosphere) v20180525; six = new LFM-Merge. The language “Density” and “Velocity” mean that only density and you will velocity was basically enhanced, “Northward” and you will “Southward” imply the IMF orientation.
Both the thickness and you will speed leaps is nonstationary formations because the one another of these don’t meet the Rankine-Hugoniot interactions
We recommend that the real difference from the magnetospheric a reaction to the new density and you may acceleration expands is actually explained because of the magnetopause magnetic reconnection. In the event the thickness develops as well as the velocity was lingering, for even good southward IMF, the fresh solar cinch electric industry continues to be the exact same while the magnetopause reconnection price perform vary insignificantly. This new intensification associated with latest program weakens the fresh magnetospheric magnetized industry and you may actions this new dayside magnetopause earthward, in the sense while the happens in happening of southward IMF turning (Sibeck, 1994 ).
Consequently, that it enhances the magnetospheric-ionospheric currents, specifically the location step one newest
I tell you this new y component of this new magnetosheath electric occupation during the this new inflow region (during the sunward edge of your magnetopause most recent coating), sheer reconnection rates, the fresh proportion of one’s inflow velocity to your magnetosheath Alfven speed, therefore the reconnection https://datingranking.net/pl/joingy-recenzja speed normalized to your full solar breeze digital occupation within the Contour S2 about supporting recommendations. The newest reconnection speed has been determined in the limits of your magnetopause latest level because explained in Cassak and you will Shay ( 2007 ), Borovsky et al. ( 2008 ), and you will Borovsky and Birn ( 2014 ). (Profile S1 while the corresponding explanation on the support information provide additional information on the process.) We discover that difference in the fresh magnetosheath electronic career and you will reconnection rate between them operates with occurrence and velocity expands resembles the real difference throughout the solar power wind electronic job, and for the situation toward increased velocity the absolute reconnection price (and the Ey digital occupation) regarding inflow region increases with time and at the end from simulation work at gets dos.five times larger than absolutely the reconnection speed (otherwise Ey) on the situation toward enhanced thickness. not, the reconnection rates normalized with the solar power wind digital profession try nearly an equivalent both in runs and you may a little fall off during the operates from about 0.55 so you can 0.4. Such opinions is alongside those acquired in the simulation A great inside the Borovsky mais aussi al. ( 2008 ).
Highest reconnection price intensifies the region 1 latest and you will boosts the get across polar limit potential (CPCP). Figure S3 reveals temporal distinctions of one’s CPCP inside the four works. For both the northward and you will southward IMF, the newest CPCP develops smaller in the example of velocity boost, however, again the difference becomes big on the southward IMF. The CPCP seems to will still be mostly lower than an excellent saturation peak (Mountain et al., 1976 ; Siscoe et al., 2002 ), although it is close to the saturation getting a largest CPCP found in this work (southward IMF, high velocity). Anyway, we do not take notice of the aftereffect of saturation into the magnetopause place, like, while considering the dependencies inside Shape step 3.
The new grows regarding the CPCP within the Figure S3 is followed closely by overshoots and undershoots, especially in Operates dos and you can cuatro with the velocity increase. How come of them transients was explained of the adopting the. In the two cases, the full pressure expands from the discontinuities however the upsurge in the newest speed instantaneously contributes to an increase in new thickness if you’re the dwelling propagates regarding the solar power breeze regarding the inflow border toward bow amaze. So it ic pressure close to the magnetopause. You will find inspected a prospective upsurge in the density near the subsolar bow shock within the Works 2 and you may cuatro and found that the latest solar wind occurrence really increases from the leaps in acceleration, but only at multiple first jumps. When your solar power piece of cake velocity is actually reduced, this new propagation date on the inflow boundary on the bend wonder try much time and so the density has plenty of time to accumulate. Yet not, the latest occurrence enhancement drops less than step 1% to your velocity more than 500 kilometres/s. Because this impression is actually negligible normally, we believe which does not influence the newest slopes within the Profile 3. Besides, the brand new increases regarding solar piece of cake speed results in almost every other discontinuities about magnetosheath and you may magnetosphere given that those individuals forward and you may shown compressional surf in the list above. Anyway, i only use quasi-steady-state values adopting the transients inside our data.