Comparing simulated and observed EMIC wave amplitudes using in situ Van Allen Probes' measurements

被引：10

作者：

Saikin, A. A. ^{[1
]}

Jordanova, V. K. ^{[2
]}

Zhang, J. C. ^{[1
]}

Smith, C. W. ^{[1
]}

Spence, H. E. ^{[1
]}

Larsen, B. A. ^{[2
,3
]}

Reeves, G. D. ^{[2
,3
]}

Torbert, R. B. ^{[1
]}

Kletzing, C. A. ^{[4
]}

Zhelayskaya, I. S. ^{[5
]}

Shprits, Y. Y. ^{[5
,6
]}

机构：

[1] Univ New Hampshire, Dept Phys, Ctr Space Sci, Durham, NH 03824 USA

[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[3] New Mexico Consortium, Los Alamos, NM 87544 USA

[4] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA

[5] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA

[6] Univ Potsdam, GFZ German Res Ctr Geosci, Helmholtz Ctr Potsdam, Potsdam, Germany

来源：

JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS | 2018年 / 177卷

关键词：

EMIC waves; Van Allen Probes; Linear theory; Wave generation; ION-CYCLOTRON WAVES; WIND DYNAMIC PRESSURE; PARTICLE INTERACTIONS; PROTON PRECIPITATION; PLASMASPHERIC PLUMES; MAGNETIC PULSATIONS; RING CURRENT; OMEGA-HE; CLUSTER; MAGNETOSPHERE;

D O I：

10.1016/j.jastp.2018.01.024

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

We perform a statistical study calculating electromagnetic ion cyclotron (EMIC) wave amplitudes based off in situ plasma measurements taken by the Van Allen Probes' (1.1-5.8 R-e) Helium, Oxygen, Proton, Electron (HOPE) instrument. Calculated wave amplitudes are compared to EMIC waves observed by the Electric and Magnetic Field Instrument Suite and Integrated Science on board the Van Allen Probes during the same period. The survey covers a 22-month period (1 November 2012 to 31 August 2014), a full Van Allen Probe magnetic local time (MLT) precession. The linear theory proxy was used to identify EMIC wave events with plasma conditions favorable for EMIC wave excitation. Two hundred and thirty-two EMIC wave events (103 H+-band and 129 He+-band) were selected for this comparison. Nearly all events selected are observed beyond L = 4. Results show that calculated wave amplitudes exclusively using the in situ HOPE measurements produce amplitudes too low compared to the observed EMIC wave amplitudes. Hot proton anisotropy (A(hp)) distributions are asymmetric in MLT within the inner (L < 7) magnetosphere with peak (minimum) A(hp), similar to 0.81 to 1.00 (similar to 0.62), observed in the dawn (dusk), 0000 < MLT <= 1200 (1200 < MLT <= 2400), sectors. Measurements of A(hp) are found to decrease in the presence of EMIC wave activity. A(hp) amplification factors are determined and vary with respect to EMIC wave-band and MLT. He+-band events generally require double (quadruple) the measured A(hp) for the dawn (dusk) sector to reproduce the observed EMIC wave amplitudes.

引用

页码：190 / 201

页数：12

共 78 条

[11] CYCLOTRON INSTABILITIES AND ELECTROMAGNETIC EMISSION IN ULTRA LOW FREQUENCY AND VERY LOW FREQUENCY RANGES [J].

CORNWALL, JM .

JOURNAL OF GEOPHYSICAL RESEARCH, 1965, 70 (01) :61-+

[12] PC 1 MICROPULSATION ACTIVITY AND MAGNETOSPHERIC AMPLIFICATION OF 0.2- TO 5.0-HZ HYDROMAGNETIC WAVES [J].

CRISWELL, DR .

JOURNAL OF GEOPHYSICAL RESEARCH, 1969, 74 (01) :205-+

[13] Effect of spatial density variation and O plus concentration on the growth and evolution of electromagnetic ion cyclotron waves [J].

Denton, R. E. ;

Jordanova, V. K. ;

Fraser, B. J. .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2014, 119 (10) :8372-8395

[14] Multi-instrument observations from Svalbard of a traveling convection vortex, electromagnetic ion cyclotron wave burst, and proton precipitation associated with a bow shock instability [J].

Engebretson, M. J. ;

Yeoman, T. K. ;

Oksavik, K. ;

Soraas, F. ;

Sigernes, F. ;

Moen, J. I. ;

Johnsen, M. G. ;

Pilipenko, V. A. ;

Posch, J. L. ;

Lessard, M. R. ;

Lavraud, B. ;

Hartinger, M. D. ;

Clausen, L. B. N. ;

Raita, T. ;

Stolle, C. .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2013, 118 (06) :2975-2997

[15] Storm time observations of electromagnetic ion cyclotron waves at geosynchronous orbit: GOES results [J].

Fraser, B. J. ;

Grew, R. S. ;

Morley, S. K. ;

Green, J. C. ;

Singer, H. J. ;

Loto'aniu, T. M. ;

Thomsen, M. F. .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2010, 115

[16] GROUND-SATELLITE STUDY OF A PC-1 ION-CYCLOTRON WAVE EVENT [J].

FRASER, BJ ;

KEMP, WJ ;

WEBSTER, DJ .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1989, 94 (A9) :11855-11863

[17] Is the plasmapause a preferred source region of electromagnetic ion cyclotron waves in the magnetosphere? [J].

Fraser, BJ ;

Nguyen, TS .

JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 2001, 63 (11) :1225-1247

[18] Predicting electromagnetic ion cyclotron wave amplitude from unstable ring current plasma conditions [J].

Fu, Xiangrong ;

Cowee, Misa M. ;

Jordanova, Vania K. ;

Gary, S. Peter ;

Reeves, Geoffrey D. ;

Winske, Dan .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2016, 121 (11) :10954-10965

[19] Helium, Oxygen, Proton, and Electron (HOPE) Mass Spectrometer for the Radiation Belt Storm Probes Mission [J].

Funsten, H. O. ;

Skoug, R. M. ;

Guthrie, A. A. ;

MacDonald, E. A. ;

Baldonado, J. R. ;

Harper, R. W. ;

Henderson, K. C. ;

Kihara, K. H. ;

Lake, J. E. ;

Larsen, B. A. ;

Puckett, A. D. ;

Vigil, V. J. ;

Friedel, R. H. ;

Henderson, M. G. ;

Niehof, J. T. ;

Reeves, G. D. ;

Thomsen, M. F. ;

Hanley, J. J. ;

George, D. E. ;

Jahn, J. -M. ;

Cortinas, S. ;

De Los Santos, A. ;

Dunn, G. ;

Edlund, E. ;

Ferris, M. ;

Freeman, M. ;

Maple, M. ;

Nunez, C. ;

Taylor, T. ;

Toczynski, W. ;

Urdiales, C. ;

Spence, H. E. ;

Cravens, J. A. ;

Suther, L. L. ;

Chen, J. .

SPACE SCIENCE REVIEWS, 2013, 179 (1-4) :423-484

[20] Model of electromagnetic ion cyclotron waves in the inner magnetosphere [J].

Gamayunov, K. V. ;

Engebretson, M. J. ;

Zhang, M. ;

Rassoul, H. K. .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2014, 119 (09) :7541-7565

← 1 2 3 4 5 6 7 8 →