- Mention.Runs: 1 = The new noncoupled SWMF (vdos0140611); 2 = the same noncoupled SWMF that have ionospheric conductivity out-of ten S alternatively of 5 S; step three = a comparable design that have a highly higher ionospheric conductivity one hundred S; 4 = the same model having a dipole tilt 29° in xz jet; 5 = brand new SWMF SIMI (interior magnetosphere-ionosphere) v20180525; 6 = the fresh LFM-Combine. The language “Density” and you may “Velocity” indicate that simply thickness and you can speed was in fact increased, “Northward” and you can “Southward” imply the IMF positioning.
The occurrence and you can velocity jumps is actually nonstationary formations while the each other of them do not meet up with the Rankine-Hugoniot connections
I recommend that the real difference witryna mobilna hongkongcupid on the magnetospheric a reaction to the occurrence and velocity grows was explained by magnetopause magnetic reconnection. In case the occurrence expands as well as the acceleration are ongoing, for even a beneficial southward IMF, the fresh new solar snap electronic occupation remains the same and magnetopause reconnection speed create differ insignificantly. The newest intensification of current system weakens the brand new magnetospheric magnetized job and motions the latest dayside magnetopause earthward, in the sense while the takes place in the truth away from southward IMF flipping (Sibeck, 1994 ).
Consequently, this enhances the magnetospheric-ionospheric currents, particularly the region step one latest
I show the fresh new y element of this new magnetosheath digital career into the the inflow region (on sunward line of one’s magnetopause latest level), pure reconnection price, new proportion of one’s inflow speed for the magnetosheath Alfven rate, in addition to reconnection speed stabilized for the complete solar power cinch electric field into the Shape S2 regarding the supporting recommendations. Brand new reconnection rates might have been computed within limits of your magnetopause current level as the explained in the Cassak and Shay ( 2007 ), Borovsky et al. ( 2008 ), and Borovsky and you will Birn ( 2014 ). (Shape S1 additionally the related need regarding help recommendations render additional information on the process.) We discover the difference in the brand new magnetosheath electronic industry and you may reconnection rates among them operates that have occurrence and you may velocity expands is comparable to the difference about solar power wind electric community, and also for the situation with the increased acceleration absolutely the reconnection rate (and the Ey digital community) in the inflow part expands in time as well as the end out-of simulation focus on becomes 2.five times larger than the absolute reconnection rate (otherwise Ey) toward situation towards enhanced thickness. However, the latest reconnection cost normalized towards solar power piece of cake digital field is actually nearly an equivalent in both operates and you can quite drop off inside the runs from about 0.55 so you can 0.cuatro. These philosophy try close to those people obtained for the simulator A for the Borovsky ainsi que al. ( 2008 ).
Highest reconnection rates intensifies the region step one newest and you will escalates the cross polar cap possible (CPCP). Shape S3 suggests temporary differences of CPCP within the four operates. For both the northward and you will southward IMF, new CPCP grows smaller in the case of velocity improve, but once again the difference will get good-sized toward southward IMF. Brand new CPCP generally seems to are still mainly lower than good saturation top (Mountain mais aussi al., 1976 ; Siscoe ainsi que al., 2002 ), although it would-be close to the saturation to possess a largest CPCP found in that it works (southward IMF, high velocity). Anyhow, we do not observe the effect of saturation into magnetopause place, such as for example, while considering new dependencies inside Shape 3.
The fresh new expands from the CPCP within the Figure S3 was followed closely by overshoots and you can undershoots, particularly in Runs dos and cuatro on the acceleration raise. Why ones transients was explained because of the adopting the. In both cases, the total pressure expands through the discontinuities nevertheless increase in the brand new velocity instantaneously causes a boost in the fresh new density when you are the structure propagates regarding solar power breeze on the inflow border into the ribbon wonder. That it ic stress near the magnetopause. I have checked a potential increase in this new thickness nearby the subsolar bend amaze for the Operates dos and you can 4 and discovered you to definitely the solar breeze occurrence very expands at the jumps in acceleration, however, only at numerous basic jumps. In case the solar power piece of cake acceleration is reduced, the latest propagation time regarding the inflow line towards bow amaze was enough time therefore, the density provides enough time to stack up. But not, the new thickness enhancement drops lower than step 1% to your speed greater than five-hundred kilometer/s. That feeling was negligible quite often, we think which will not determine this new mountains when you look at the Contour step three. Along with, the newest develops from the solar snap velocity contributes to most other discontinuities throughout the magnetosheath and you will magnetosphere once the people send and you may reflected compressional waves listed above. Anyway, we only use quasi-steady-state beliefs adopting the transients within investigation.