- Notice.Runs: step 1 = Brand new noncoupled SWMF (vdos0140611); 2 = an equivalent noncoupled SWMF having ionospheric conductivity regarding 10 S alternatively of five S; step three = a comparable model that have a very highest ionospheric conductivity one hundred S; cuatro = the same design that have a good dipole tip 29° within the xz airplanes; 5 = the brand new SWMF SIMI (interior magnetosphere-ionosphere) v20180525; six = the newest LFM-Blend. The text “Density” and you will “Velocity” indicate that simply thickness and you will speed were improved, “Northward” and you will “Southward” suggest the fresh new IMF orientation.
Both occurrence and you may acceleration jumps try nonstationary structures just like the both of them don’t meet up with the Rankine-Hugoniot relations
We suggest that the real difference on magnetospheric response to the density and velocity develops try said of the magnetopause magnetic reconnection. In the event your density develops while the velocity are constant, even for an excellent southward IMF, the fresh solar cinch electronic occupation continues to be the same and also the magnetopause reconnection price manage will vary insignificantly. The latest intensification of the latest program weakens the brand new magnetospheric magnetic occupation and you can actions the fresh new dayside magnetopause earthward, in the sense due to the fact happens in the situation from southward IMF turning (Sibeck, 1994 ).
Consequently, which raises the magnetospheric-ionospheric currents, particularly the location 1 latest
We inform you the y part of new magnetosheath electronic industry within the the inflow area (during the sunward line of the magnetopause latest covering), natural reconnection rates, the newest proportion of your inflow velocity for the magnetosheath Alfven price, additionally the reconnection rate normalized to the full solar power breeze electronic field in Contour S2 regarding help suggestions. The reconnection price has been calculated from the limits of your own magnetopause latest level given that said for the Cassak and you will Shay ( 2007 ), Borovsky et al. ( 2008 ), and you can Borovsky and Birn ( 2014 ). (Contour S1 as well as the involved reason in the supporting information render additional information on the procedure.) We discover your difference between the newest magnetosheath electric occupation and reconnection speed among them operates having occurrence and you may velocity expands is related to the real difference from the solar breeze electronic job, and also for the circumstances toward increased acceleration absolutely the reconnection rate (as well as the Ey electronic career) from the inflow area increases in time at the end out of simulator work with becomes 2.5 times larger than przykłady profili happn the absolute reconnection price (otherwise Ey) to the instance toward improved occurrence. However, the fresh reconnection pricing stabilized toward solar breeze electronic job are nearly the same in both operates and a little drop off inside works from around 0.55 to 0.4. This type of values is actually near to people received during the simulation An effective for the Borovsky ainsi que al. ( 2008 ).
Large reconnection price intensifies the location 1 current and you may escalates the mix polar cover possible (CPCP). Figure S3 shows temporal distinctions of the CPCP when you look at the five works. For both the northward and southward IMF, brand new CPCP increases smaller regarding speed improve, but once more the difference will get generous to the southward IMF. This new CPCP appears to are nevertheless generally less than good saturation peak (Mountain et al., 1976 ; Siscoe mais aussi al., 2002 ), though it might be close to the saturation having a largest CPCP included in that it really works (southward IMF, high velocity). In any event, we really do not take notice of the effectation of saturation for the magnetopause place, such as, while considering the newest dependencies in Contour step three.
Brand new increases regarding CPCP from inside the Figure S3 is actually with overshoots and you may undershoots, particularly in Operates dos and you may 4 on the speed boost. The reason ones transients would be said from the pursuing the. In both cases, the total tension expands through the discontinuities nevertheless the rise in this new velocity instantly results in a boost in the fresh new density whenever you are the dwelling propagates regarding solar power snap from the inflow edge to your bow treat. It ic pressure around the magnetopause. You will find checked a prospective boost in the brand new density close to the subsolar bend surprise in Works 2 and you can cuatro and found one the fresh solar piece of cake occurrence very develops at the jumps for the acceleration, however, here at numerous very first jumps. When your solar power snap speed try lower, the latest propagation day regarding inflow border toward ribbon surprise are long so that the density have plenty of time to stack up. However, the latest density enhancement falls below 1% to the velocity greater than five hundred kilometres/s. Because effect is actually negligible in most cases, we think so it doesn’t influence new hills in Profile step three. Besides, the newest expands about solar power wind acceleration causes other discontinuities about magnetosheath and you will magnetosphere due to the fact people forward and you may shown compressional surf in the above list. Anyway, i just use quasi-steady-state thinking following transients within investigation.
