施工実績

• Mention.Runs: 1 = Brand new noncoupled SWMF (v20140611); dos = a similar noncoupled SWMF that have ionospheric conductivity off 10 S instead of five S; 3 = an equivalent design having a highly higher ionospheric conductivity 100 S; 4 = a similar design which have a beneficial dipole tip 29° in xz airplanes; 5 = the fresh SWMF SIMI (internal magnetosphere-ionosphere) v20180525; six = the latest LFM-Merge. The text “Density” and you may “Velocity” imply that simply density and you can speed had been improved, “Northward” and “Southward” indicate the new IMF orientation.

Both the thickness and velocity jumps are nonstationary formations since both of those don’t meet up with the Rankine-Hugoniot relations

We advise that the difference throughout the magnetospheric reaction to the newest thickness and you will acceleration grows is actually told me of the magnetopause magnetic reconnection. If your occurrence grows together with speed was ongoing, even for a good southward IMF, the new solar power breeze electronic industry continues to be the exact same together with magnetopause reconnection rate carry out differ insignificantly. The brand new intensification regarding the current system weakens the fresh new magnetospheric magnetized industry and actions the fresh new dayside magnetopause earthward, in the same manner since happens in possible out-of southward IMF turning (Sibeck, 1994 ).

Subsequently, this raises the magnetospheric-ionospheric currents, in particular the spot step one newest

I tell you the fresh y component of the magnetosheath electric community within the the newest inflow part (on sunward border of the magnetopause current covering), natural reconnection price, the fresh proportion of your own inflow speed to your magnetosheath Alfven rate, therefore the reconnection price stabilized toward total solar wind digital profession into the Contour S2 regarding support advice. The latest reconnection price could have been computed in the limitations of magnetopause most recent level due to the fact said into the Cassak and you will Shay ( 2007 ), Borovsky mais aussi al. ( 2008 ), and Borovsky and you will Birn ( 2014 ). (Contour S1 and the corresponding reasons on supporting guidance give more information on the process.) We find your difference between the fresh magnetosheath digital occupation and reconnection rates between them operates which have occurrence and you will velocity develops is comparable to the difference on the solar snap electric industry, and also for the circumstances towards the enhanced velocity the absolute reconnection rates (in addition to Ey digital job) on inflow region develops after a while and also at the end out of simulator manage will get dos.five times bigger than absolutely the reconnection price (or Ey) into situation with the improved occurrence. However, the fresh reconnection rates normalized to the solar piece of cake digital industry is nearly a similar both in runs and you can slightly decrease for the works from about 0.55 in order to 0.4. These types of values try near to those people obtained in simulation An effective inside Borovsky et al. ( 2008 ).

Highest reconnection rate intensifies the spot 1 current and you may advances the cross polar cover potential (CPCP). Contour S3 suggests temporal differences of the CPCP during the four runs. For the northward and you may southward IMF, the fresh CPCP develops shorter when it comes to speed improve, however, again the real difference will get big to your southward IMF. The CPCP seems to are nevertheless mainly less than an effective saturation top (Hill et al., 1976 ; Siscoe mais aussi al., 2002 ), though it might possibly be around the saturation to have a prominent CPCP found in so it performs (southward IMF, high velocity). Anyway, we really do not take notice of the effectation of saturation into magnetopause venue, such, while considering the brand new dependencies during the Figure 3.

New grows on CPCP inside the Shape S3 are accompanied by overshoots and undershoots, particularly in Works 2 and you will 4 on the velocity raise. How come of them transients was said of the adopting the. In the two cases, the total tension grows from discontinuities however the rise in the latest speed instantaneously results in a boost in the newest density if you are the dwelling propagates regarding the solar power breeze on inflow edge towards ribbon shock. That it ic stress near the magnetopause. I’ve checked a prospective increase in brand new occurrence around the subsolar bow surprise within the Works 2 and you can 4 and found you to definitely the fresh solar power piece of cake occurrence really increases from the leaps during the speed, however, at several earliest leaps. If your solar breeze acceleration try lowest, the fresh new propagation go out on the inflow edge to your ribbon amaze are much time therefore, the occurrence has enough time to accumulate. Although not, the fresh thickness enhancement falls less than step one% with the speed more than 500 kilometer/s. Because feeling are minimal most of the time, we feel this cannot influence the fresh mountains iamnaughty in Shape 3. As well as, brand new develops regarding solar snap acceleration leads to other discontinuities on magnetosheath and magnetosphere because those individuals forward and you can mirrored compressional waves in the list above. In any event, we use only quasi-steady state viewpoints following transients inside our study.