Jaroslav Chum

Position:	Senior Research Scientist
Email:
Phone:	+420 267 103 301
Room:	G301

Education:

• 1989 Dipl.Ing. Technical Cybernetics, Faculty of electrical engineering (FEL) of the Czech  Technical University (CVUT),Prague
• 2004  Ph.D. - Plasma Physics, Czech Technical University - Faculty of Electricity, Department of Physics, Prague, 2004

Employment and academic experience:

• 1991 – 2000:     Research Engineer, Dept. of the Upper Atmosphere (Ionosphere), IAP (Institute of Geophysics), Prague
• 2001 - present:  Research Scientist, Dept. of the Upper Atmosphere, IAP, Prague

Professional interests:

Technical Experience: 

J. Chum was involved in designing electronic subsystems for Magion-4 and Magion-5 satellite (analogue command decoder, Sun sensors, infrared Earth sensor and electronics for attitude determination, frame grabber for camera). After 2000, he has also been involved in designing a new digital sun sensor for future missions and ground based measurements carried out at IAP, e.g. Continuous Doppler sounding of the ionosphere.

Scientific research activity

Since 2001, J. Chum has been involved in Space plasma physics investigations with a focus on wave propagation in the Earth’s magnetosphere and ionosphere. The scientific activity prevails in recent years. His areas of interest are:

• chorus emissions
• lightning induced whistlers
• geomagnetic pulsations
• Atmospheric Gravity Waves and infrasound in the ionosphere

J. Chum  is author or co-author of  more than  30  articles  in international refereed journals.

Selected publications:

• Šindelářová, Tereza ; Chum, Jaroslav ; Skripniková, Kateřina ; Baše, Jiří, 2015: Atmospheric infrasound observed during intense convective storms on 9-10 July 2011, Journal of Atmospheric and Solar-Terrestrial Physics, -, 122, pp. 66-74
• Chum, Jaroslav ; Bonomi, F. A. M. ; Fišer, Jiří ; Cabrera, M. A. ; Ezquer, R. G. ; Burešová, Dalia ; Laštovička, Jan ; Baše, Jiří ; Hruška, František ; Molina, M. G. ; Ise, J. E. ; Cangemi, J. I. ; Šindelářová, Tereza, 2014: Propagation of gravity waves and spread F in the low-latitude ionosphere over Tucumán, Argentina, by continuous Doppler sounding: First results, Journal of Geophysical Research: Space Physics, 119, 8, pp. 6954-6965
• Chum, Jaroslav ; Diendorfer, G. ; Šindelářová, Tereza ; Baše, Jiří ; Hruška, František, 2013: Infrasound pulses from lightning and electrostatic field changes: Observation and discussion, Journal of Geophysical Research: Atmospheres, 118, 19, pp. 50805/1-50805/12
• Fišák, Jaroslav ; Chum, Jaroslav ; Vojta, Jaroslav ; Bartůňková, Kristýna, 2013: Automatic Monitoring of the Amount of Deposited Precipitation, Journal of Hydrometeorology, 14, 2, pp. 670-676
• Habarulema, J. B. ; McKinnell, L.- A. ; Burešová, Dalia ; Zhang, Y. ; Seemala, G. ; Ngwira, Ch. ; Chum, Jaroslav ; Opperman, B., 2013: A comparative study of TEC response for the African equatorial and mid-latitudes during storm conditions, Journal of Atmospheric and Solar-Terrestrial Physics, 102, pp. 105-114
• Chum, Jaroslav ; Athieno, R. ; Baše, Jiří ; Burešová, Dalia ; Hruška, František ; Laštovička, Jan ; McKinnell, L.- A. ; Šindelářová, Tereza, 2012: Statistical investigation of horizontal propagation of gravity waves in the ionosphere over Europe and South Africa, Journal of Geophysical Research, 117, - , pp. A03312/1-A03312/13
• Šindelářová, Tereza ; Mošna, Zbyšek ; Burešová, Dalia ; Chum, Jaroslav ; McKinnell, L.- A. ; Athieno, R., 2012: Observations of wave activity in the ionosphere over South Africa in geomagnetically quiet and disturbed periods, Advances in Space Research, 50, 2, pp. 182-195
• Chum, Jaroslav ; Hruška, František ; Zedník, Jan ; Laštovička, Jan, 2012: Ionospheric disturbances (infrasound waves) over the Czech Republic excited by the 2011 Tohoku earthquake, Journal of Geophysical Research, 117, - , pp. A08319/1
• Shklyar, D. R. ; Storey, L. R. O. ; Chum, J. ; Jiříček, F. ; Němec, F. ; Parrot, M. ; Santolík, O. ; Titova, E. E., 2012: Spectral features of lightning-induced ion cyclotron waves at low latitudes: DEMETER observations and simulation, Spectral features of lightning-induced ion cyclotron waves at low latitudes: DEMETER observations and simulation, 117, -, pp. A12206/1-A12206/16
• Krasnov, V. M. ; Drobzheva, Ya. V. ; Chum, Jaroslav, 2011: Infrasonic waves in the ionosphere generated by a weak earthquake, Journal of Atmospheric and Solar-Terrestrial Physics, 73, 13, pp. 1930-1939
• Fišer, Jiří ; Chum, Jaroslav ; Diendorfer, G. ; Parrot, M. ; Santolík, Ondřej, 2010: Whistler intensities above thunderstorms, Annales Geophysicae, 28, 1, pp. 37-46
• Chum, Jaroslav ; Šindelářová, Tereza ; Laštovička, Jan ; Hruška, František ; Burešová, Dalia ; Baše, Jiří, 2010: Horizontal velocities and propagation directions of gravity waves in the ionosphere over the Czech Republic, Journal of Geophysical Research, 115, pp. A11322/1-A11322/13
• Laštovička, Jan ; Baše, Jiří ; Hruška, František ; Chum, Jaroslav ; Šindelářová, Tereza ; Horálek, Josef ; Zedník, Jan ; Krasnov, V., 2010: Simultaneous infrasonic, seismic, magnetic and ionospheric observations in an earthquake epicentre, Journal of Atmospheric and Solar-Terrestrial Physics, 72, 16, pp. 1231-1240
• Shklyar, D. R. ; Parrot, M. ; Chum, Jaroslav ; Santolík, Ondřej ; Titova, E. E., 2010: On the origin of lower- and upper-frequency cutoffs on wedge-like spectrograms observed by DEMETER in the midlatitude ionosphere, Journal of Geophysical Research, 115, pp. A05203/1-A05203/12
• Santolík, Ondřej ; Chum, Jaroslav, 2009: The origin of plasmaspheric hiss, Science, 324, 5928, pp. 729-730
• Breneman, A. W. ; Kletzing, C. A. ; Pickett, J. ; Chum, Jaroslav ; Santolík, Ondřej, 2009: Statistics of multispacecraft observations of chorus dispersion and source location, Journal of Geophysical Research, 114, pp. A06202/1-A06202/12
• Chum, Jaroslav ; Santolík, Ondřej ; Parrot, M., 2009: Analysis of subprotonospheric whistlers observed by DEMETER: A case study, Journal of Geophysical Research, 114, A02, pp. A02307/1-A02307/17
• Chum, Jaroslav ; Hruška, František ; Burešová, Dalia ; Šindelářová, Tereza ; Hejda, Pavel ; Bochníček, Josef, 2009: Ionospheric oscillations caused by geomagnetic Pi2 pulsations and their observations by multipoint continuous Doppler sounding; first results, Advances in Space Research, 44, 6, pp. 667-676
• Chum, Jaroslav ; Santolík, Ondřej ; Gurnett, D. A. ; Pickett, J. S., 2009: Oblique lower band chorus waves: Time shifts between discrete elements observed by the Cluster spacecraft, Journal of Geophysical Research, 114, pp. A00F02/1-A00F02/13
• Santolík, Ondřej ; Gurnett, D. A. ; Pickett, J. S. ; Chum, Jaroslav ; Cornilleau-Wehrlin, N., 2009: Oblique propagation of whistler mode waves in the chorus source region, Journal of Geophysical Research, 114, pp. A00F03/1-A00F03/12
• Santolík, O. ; Parrot, M. ; Inan, U. S. ; Burešová, Dalia ; Gurnett, D. A. ; Chum, Jaroslav, 2009: Propagation of unducted whistlers from their source lightning: a case study, Journal of Geophysical Research, 114, pp. A03212/1-A03212/11
• Šindelářová, Tereza ; Burešová, Dalia ; Chum, Jaroslav ; Hruška, František, 2009: Doppler observations of infrasonic waves of meteorological origin at ionospheric heights, Advances in Space Research, 43, 11
• Šindelářová, Tereza ; Burešová, Dalia ; Chum, Jaroslav, 2009: Observations of acoustic-gravity waves in the ionosphere generated by severe tropospheric weather, Studia geophysica et geodaetica, 53, 3, pp. 403-418
• Chum, Jaroslav ; Laštovička, Jan ; Šindelářová, Tereza ; Burešová, Dalia ; Hruška, František, 2008: Peculiar transient phenomena observed by HF Doppler sounding on infrasound time scales, Journal of Atmospheric and Solar-Terrestrial Physics, 70, 6, pp. 866-878
• Jakowski, N. ; Stankov, S. M. ; Wilken, V. ; Borries, C. ; Altadill, D. ; Chum, Jaroslav ; Burešová, Dalia ; Boška, Josef ; Šauli, Petra ; Hruška, František ; Cander, Lj. R., 2008: Ionospheric behaviour over Europe during the solar eclipse of 3 October 2005, Journal of Atmospheric and Solar-Terrestrial Physics, 70, 6, pp. 836-853
• Santolík, Ondřej ; Parrot, M. ; Chum, Jaroslav, 2008: Propagation Spectrograms of Whistler-Mode Radiation from Lightning, IEEE Transactions on Plasma Science, 36, 4, pp. 1166-1167
• Breneman, A. ; Kletzing, C. A. ; Chum, Jaroslav ; Santolík, Ondřej ; Gurnett, D. ; Pickett, J, 2007: Multispacecraft observations of chorus dispersion and source location, Journal of Geophysical Research, 112, A5, pp. A05221/1-A05221/8
• Burešová, Dalia ; Krasnov, Valerij Michailovič ; Drobzheva, Yana Viktorovna ; Laštovička, Jan ; Chum, Jaroslav ; Hruška, František, 2007: Assessing the quality of ionogram interpretation using the HF Doppler technique, Annales Geophysicae, 25, 4
• Chum, Jaroslav ; Santolík, Ondřej ; Breneman, A. W. ; Kletzing, C. A. ; Gurnett, D. A. ; Pickett, J. S., 2007: Chorus source properties that produce time shifts and frequency range differences observed on different Cluster spacecraft, Journal of Geophysical Research, 112, A6, pp. A06206/1-A06206/10
• Santolík, Ondřej ; Chum, Jaroslav ; Parrot, M. ; Gurnett, D. A. ; Pickett, J. S. ; Cornilleau-Wehrlin, N., 2006: Propagation of whistler mode chorus to low altitudes: Spacecraft observations of structured ELF hiss, Journal of Geophysical Research, 111, A10, pp. A10208/1-A10208/13
• Chum, Jaroslav ; Jiříček, František ; Santolík, Ondřej ; Parrot, M. ; Diendorfer, G. ; Fišer, Jiří, 2006: Assigning the causative lightning to the whistlers observed on satellites, Annales Geophysicae, 24, 11, pp. 2921-2929
• Chum, Jaroslav ; Jiříček, František ; Šmilauer, Jan, 2005: Nonducted propagation of chorus emissions and their observation, Planetary and Space Science, 53, 1-3, pp. 307-315
• Chum, Jaroslav ; Santolík, Ondřej, 2005: Propagation of whistler-mode chorus to low altitudes: divergent ray trajectories and ground accessibility, Annales Geophysicae, 110, -, pp. D10107/1/-D10107/11
• Tříska, Pavel ; Czapek, Alexandr ; Chum, Jaroslav ; Hruška, František ; Šimůnek, Jiří ; Šmilauer, Jan ; Truhlík, Vladimír ; Vojta, Jaroslav, 2005: Space weather effects on the MAGION-4 and MAGION-5 solar cells, Annales Geophysicae, 23, -, pp. 3111-3113

Projects:

• GA ČR. GC15-07281J, Phenomena coupling the neutral and ionized atmosphere , 2015–2017. Investigator: Chum, J. Details
• GA ČR. GA205/09/1253, Electromagnetic phenomena coupling the troposphere, mesosphere, ionosphere and magnetosphere, 2009-2013. Investigator: Chum, J. Details

Other:

Since 2012 member of the Board of the Institute