Prosiectau Ffiseg ar gyfer myfyrwyr bl.3 a bl.4

Disgrifiad prosiect

Energy transfer during geomagnetic sudden commencement events

(supervisor: Heather McCreadie)

Nature of project: data analysis, theory

Available to students on full-time physics degree schemes or joint students.

Project description and methodology

The magnetic local time and latitude dependence of amplitude of the main impulse (MI) of geomagnetic sudden commencements (SCs) and its seasonal variation have been investigated using geomagnetic data in the latitudinal range 27-70 degrees for the period 1996-2010 over the Japanese longitudes. Is there a longitudinal variation or not? You will first identify SC events and then gather data and statistically analyse the data set.

This area of research delves into the region of the solar-wind-Earth interaction. Knowledge of these events enables us to map the plasma that satellites fly in during the initial phases of geomagnetic events.

A successful project will develop beyond the above in one/some of the following directions:
A 3-D model of one SC event would develop this area further.

When considering where to take your project, please bear in mind the time available. It is preferable to do fewer things well than to try many and not get conclusive results on any of them. However, sometimes it is useful to have a couple of strands of investigation in parallel to work on in case delays occur.

Additional scope or challenge if taken as a Year-4 project: Including another longitude and analysing one event with a forward model would be required of a fourth year student.

Please speak to Heather McCreadie (hem18) if you consider doing this project.

Initial literature for students:

  1. Shinbori, A., Y. Tsuji, T. Kikuchi, T. Araki, A. Ikeda, T. Uozumi, D. Baishev, B. M. Shevtsov, T. Nagatsuma, and K. Yumoto (2012), Magnetic local time and latitude dependence of amplitude of the main impulse (MI) of geomagnetic sudden commencements and its seasonal variation, J. Geophys. Res., 117, A08322, doi:10.1029/2012JA018006.
  2. Araki, T and Shinbori, A. Y. (2016), Relationship between solar wind dynamic pressure and amplitude of geomagnetic sudden commencement (SC) Earth, Planets and Space 68:90, https://doi.org/10.1186/s40623-016-0444-y
  3. Hartinger, M. D., Z. Xu, C. R. Clauer, Y. Yu, D. R. Weimer, H. Kim, V. Pilipenko, D. T. Welling, R. Behlke, and A. N. Willer (2017), Associating ground magnetometer observations with current or voltage generators, J. Geophys. Res. Space Physics, 122, 7130–7141, doi:10.1002/2017JA024140.
  4. Takahashi, N., Y. Kasaba, A. Shinbori, Y. Nishimura, T. Kikuchi, Y. Ebihara, and T. Nagatsuma (2015), Response of ionospheric electric fields at mid-low latitudes during sudden commencements. J. Geophys. Res. Space Physics, 120, 4849–4862. doi: 10.1002/2015JA021309.

Novelty, degree of difficulty and amount of assistance required

The student will learn to program in Matlab. This will require initial assistance.

Project milestones and deliverables (including timescale)

milestoneto be completed by
understanding of data given shownend of October
learning how to use software.Christmas
Collecting magnetograms. Software development for display of data and statistical analysis.end of February
Comparison of the data with other similar analysis. Easter