Climatology and modeling of ionospheric irregularities over Greenland based on empirical orthogonal function method | Journal of Space Weather and Space Climate

Topical Issue - Ionospheric plasma irregularities and their impact on radio systems

Open Access

Table 2

Correlation coefficients of the commonly used solar and geomagnetic indices with the first 4 EOF coefficients.

Coefficient	A1	A2	A3	A4
IMF Bt	0.73	−0.07	−0.42	−0.30
IMF B_X	−0.09	−0.25	0.11	−0.08
IMF B_Y (GSM)	0.17	0.36	−0.11	0.08
IMF B_Z (GSM)	0.04	0.04	0.06	0.12
Solar wind speed	0.15	−0.04	−0.11	−0.16
Solar wind pressure	0.45	−0.08	−0.33	−0.12
IEF	−0.08	−0.03	0.01	−0.09
Kp index	0.48	0.02	−0.34	−0.25
Sunspot number	0.81	0.05	−0.43	−0.36
Dst index	−0.54	−0.01	0.47	0.13
Ap index	0.45	0.05	−0.35	−0.19
AE index	0.35	0.14	−0.18	−0.33
AL index	−0.36	−0.07	0.23	0.24
AU index	0.32	0.24	−0.08	−0.45
Polar Cap index	0.38	0.02	−0.37	−0.18
F10.7P index	0.86	0.02	−0.48	−0.35
Coupling function	0.13	−0.08	−0.10	−0.19

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