论文标题
主要地磁风暴强度(DST $ \ le $ -100 nt)的依赖性对相关的太阳风参数
Dependence of Intensities of Major Geomagnetic Storms (Dst $\le$ -100 nT) on Associated Solar Wind Parameters
论文作者
论文摘要
地磁风暴是太阳风与南磁场和磁层之间持续相互作用的结果。为了调查各种太阳风参数对主要地貌风暴强度的影响,使用了1998年至2006年之间发生的67个主要地磁风暴,用于计算主要地貌的强度(CCS)在主要地貌磁场的强度与南方磁场的时间积分$ b _ $ b _ $ b _ $ b _ $ b _ $ e Entional $ e Entional($相关的地磁风暴的主要阶段。 Sym-H $ _ {min} $用于指示相关的主要地磁风暴的强度,而我($ b_z $),i($ e_y $)和i(q)用于指示$ b_z $,$ e_y $的时间积分,$ e_y $和q在相关主要的主要地质风暴的主要阶段中。 i($ b_z $)和sym-h $ _ {min} $之间的派生cc是0.33,而i($ e_y $)和sym-h $ _ {min} $之间的CC为0.57,i(q)和sym-h $ _ $ _ {min} $的CC为0.86。该结果提供了统计证据,表明太阳风动态压力或太阳风密度在将太阳能风能转移到磁层中起着重要作用,此外,除了南方的磁场和太阳风速。具有强大地理表面的太阳风需要太阳能风力压力$> $ 3 NPA或太阳风密度$> 3 $ NPA $/v_ {sw}^2 $。仅大的持续时间$ b_s $无法确保大型地磁风暴,尤其是当太阳能风动压力非常低的情况下,大且长持续时间BS并不完整,只是触发重大地磁风暴的必要条件。
A geomagnetic storm is the result of sustained interaction between solar wind with a southward magnetic field and the magnetosphere. To investigate the influence of various solar wind parameters on the intensity of major geomagnetic storm, 67 major geomagnetic storms that occurred between 1998 and 2006 were used to calculate the correlation coefficients (CCs) between the intensities of major geomagnetic storms and the time integrals of southward interplanetary magnetic field $B_s$, solar wind electric field ($E_y$) and injection function (Q) during the main phase of the associated geomagnetic storms. SYM-H$_{min}$ was used to indicate the intensity of the associated major geomagnetic storm, while I($B_z$), I($E_y$) and I(Q) were used to indicate the time integrals of $B_z$, $E_y$ and Q during the main phase of associated major geomagnetic storm respectively. The derived CC between I($B_z$) and SYM-H$_{min}$ is 0.33, while the CC between I($E_y$) and SYM-H$_{min}$ is 0.57 and the CC between I(Q) and SYM-H$_{min}$ is 0.86. The results provide statistical evidence that solar wind dynamic pressure or solar wind density plays a significant role in transferring solar wind energy into the magnetosphere, in addition to the southward magnetic field and solar wind speed. Solar wind that has a strong geoeffectiveness requires solar wind dynamic pressure $>$3 nPa or solar wind density $>3$ nPa$/V_{sw}^2$. Large and long duration $B_s$ alone cannot ensure a major geomagnetic storm, especially if the solar wind dynamic pressure is very low, as large and long duration Bs is not a full condition, only a necessary condition to trigger a major geomagnetic storm.