Work Description

Title: The Observation and Simulation Dataset for The Response of the Coupled Magnetosphere-Ionosphere System to the 15 August 2015 Solar Wind Dynamic Pressure Enhancement Open Access Deposited
Attribute Value
  • We used NCAR's Yellowstone Supercomputer Cluster to run SWMF for Magnetosphere-Ionosphere modules. The output for virtual magnetometers, virtual satellites and ionosphere component are provided. We also include output plots created with Spacepy Library.
  • The rapid increases in solar wind dynamic pressure, termed sudden impulses (SIs), compress Earth’s dayside magnetosphere and strongly perturb the coupled Magnetosphere-Ionosphere (M-I) system. The compression of the dayside magnetosphere launches magnetohydrodynamic (MHD) waves, which propagate down to the ionosphere, changing the Auroral Field Aligned Currents (FACs), and into nightside magnetosphere. The global response to the compression front sweeping through the coupled system is not yet fully understood due to the sparseness of the measurements, especially those with the necessary time resolution to resolve the propagating disturbances. That’s why a study including modeling is necessary. On 15 August 2015 at 7.44 UT, Advanced Composition Explorer measured a sudden increase in the solar wind dynamic pressure from 1.11 nPa to 2.55 nPa as shown in Figure-1. We use the magnetospheric spacecraft in the equatorial magnetosphere to identify the signatures of magnetosphere response to this SI event and examine the interaction of the propagating disturbances with the M-I system. With the increased time resolution of Active Magnetosphere and Polar Electrodynamics Response Experiment (AMPERE), the FAC pattern and intensity change due to SI can also be studied in more depth. We further use measurements from ground based magnetometer stations to increase our tracking capability for the disturbances in the ionosphere and to improve our understanding of their propagation characteristics. This is the first step in a comprehensive multi-point observation and a global magnetohydrodynamic simulation based investigation of the response of the coupled M-I system to sudden impulses.
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Last modified
  • 03/26/2020
  • 04/21/2016
To Cite this Work:
Ozturk, D. (2016). The Observation and Simulation Dataset for The Response of the Coupled Magnetosphere-Ionosphere System to the 15 August 2015 Solar Wind Dynamic Pressure Enhancement [Data set]. University of Michigan - Deep Blue.


Files (Count: 188; Size: 813 MB)

Author : Dogacan Su Ozturk
Affilliation : University of Michigan
Department of Climate and Space Sciences and Engineering

Michigan Geophysical Union 2016 Poster Presentation
Title : Study on 15 August 2015 Sudden Impulse Event

Contents of the Data File :
1. AMPERE data
2. Data Comparison Plots
3. LICENSE.txt
4. PostProcessing Codes
5. README.txt
6. Simulation Input
7. Simulation Logs
8. Simulation Output
9. Spacecraft data
10. SuperMAG data

Active Magnetosphere and Polar Electrodynamics Response Experiment
(AMPERE) data is taken from
The netCDF file contains :
- AMPERE dB (Raw Vectors)
- AMPERE dB (Vectors)
- AMPERE dB Magnitude
- AMPERE Current Density
- I Density Color Key
- dB Magnitude Color Key
- dB Color Key
If data is used, please include “We thank the AMPERE team and the
AMPERE Science Center for providing the Iridium-derived data products.”
in your acknowledgement section.
Data Comparison Plots
There are two sets of data comparison plots. The formats for these
files are PNG.
IE Plots >> movie_HP_facs_HHMM.png
movie files for Hall, Pedersen conductivities and Field-Aligned

MAG Plots >> imf_at_YYYYMMDD_HHMMSS.png
2D plasma parameter contour plots for XZ and XY cuts
>> pressure_wflYYYYMMDD_HHMMSS.png
>> ux_wflYYYYMMDD_HHMMSS.png

This is a Creative Commons Attribution-NonCommercial-ShareAlike 4.0
International Public License. We urge you to acknowledge the following
teams when data is utilized for a publication.

- AMPERE team
- SuperMAG team
- CDAWeb
- NCAR Yellowstone Supercomputer Cluster
- Spacepy Team
- Dogacan Su Ozturk, Shasha Zou and James Arthur Slavin

PostProcessing Codes
Aim : Produce contour plots of FACs, Hall and Pedersen conductivity
contour plots
Usage : ipython-2.7
Directory : IE Folder

Color library for the plots

Aim : Produce contour plots for velocity and pressure in XZ and XY cuts
Usage: ipython-2.7

Spacepy library is needed to run these codes.
Simulation Input
The input files that are required to configure and run the simulation.
>> Earth_grid1_medres : Grid points on Earth for interpolation (medium
>> Earth_grid2_highres : Grid points on Earth for interpolation (high
>> ground_mag_YYYYMMDD.dat : Locations of ground magnetometer stations
in MLT coordinates
>> imf_negby_posbz.dat : The solar wind parameter file for the run
>> : Amount of blocks per module
>> : Steady-state parameter file
>> : Time-accurate parameter file
>> sats: Folder with satellite locations in ASCII format in GSM coordinates
Simulation Logs
Log files in ASCII format procuded during the simulation.
>> IE_tYYMMDD_HHMMSS.log : Log file produced in the beginning of
simulation for IE module.
>> log_n0000001.log : Log file produced in the beginning of simulation
for GM Module.
>> runlog_YYMMDDHHMM: Runlog for the whole simulation
Simulation Output
There are two simulation outputs.
>> Ionosphere Output: binary IDL and TEC files with :
itYYMMDD_HHMMSS_000.idl and itYYMMDD_HHMMSS_000.tec
>>Magnetosphere Output : ASCII formatted text data with virtual ground
magnetometer output : magnetometers_n00000000.mag
Spacecraft Data
>> acedataYYYYMMDD.png
>> winddataYYYYMMDD.png
ACE and Wind data summary plots in png format. The data is taken from
CDAWeb. Use the following acknowledgement in case data is used in a
" We gratefully acknowledge Community Data Analysis Web Site from NASA
Goddard Space Flight Center."

SuperMAG data
The superMAG data contains 42 station outputs each named with the
short code for the station. The files are in csv format. If used
include the following acknowledgement in your publications.
"For the ground magnetometer data we gratefully acknowledge:
Intermagnet; USGS, Jeffrey J. Love; CARISMA, PI Ian Mann; CANMOS;
The S-RAMP Database, PI K. Yumoto and Dr. K. Shiokawa; The SPIDR
database;AARI, PI Oleg Troshichev; The MACCS program, PI
M. Engebretson,Geomagnetism Unit of the Geological Survey of Canada;
GIMA; MEASURE, UCLA IGPP and Florida Institute of Technology;
SAMBA, PI Eftyhia Zesta; 210 Chain, PI K. Yumoto; SAMNET, PI Farideh
Honary;The institutes who maintain the IMAGE magnetometer array, PI
Eija Tanskanen;PENGUIN; AUTUMN, PI Martin Connors; DTU Space, PI
Dr. Juergen Matzka; South Pole and McMurdo Magnetometer,
PI's Louis J. Lanzarotti and Alan T. Weatherwax; ICESTAR; RAPIDMAG;
PENGUIn; British Artarctic Survey; McMac, PI Dr. Peter Chi;
BGS, PI Dr. Susan Macmillan; Pushkov Institute of Terrestrial
Magnetism,Ionosphere and Radio Wave Propagation (IZMIRAN);
GFZ, PI Dr. Juergen Matzka; MFGI, PI B. Heilig; IGFPAS, PI J. Reda;
University of L’Aquila, PI M. Vellante; SuperMAG, PI Jesper W. Gjerloev."

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