Ing. Jaroslav Chum, Ph.D.

Funkce:	Zástupce vedoucího oddělení
Pracovní zařazení:	Vedoucí vědecký pracovník
Email:
Telefon:	+420 267 103 056

Vzdělání:

• 1989  Ing., Technická kybernetika,  Elektrotechnická fakulta ČVUT,  Praha
• 2004  Ph.D., Fyzika plazmatu, katedra fyziky, Elektrotechnická fakulta ČVUT, Praha

Zaměstnání a výuka:

• 1991 – 2000: Výzkumný pracovník, Oddělení horní atmosféry (dříve ionosféry), Ústavu fyziky atmosféry AVČR, v.v.i. (dříve Geofyzikálního ústavu), Praha
• 2001 - současnost:   Výzkumný pracovník, Oddělení horní atmosféry Ústavu fyziky atmosféry AVČR, v.v.i.,  Praha

Pracovní činnost:

Techniké (inženýrské aktivity): 

Návrh a vývoj  elektronických subsystémů družic Magion-4 a Magion-5 (analogový dekodér povelů, sluneční senzor, infračervený senzor Země, elektronika a program pro určení orientace družice, frame grabber pro kameru). Po éře Magionů (cca od roku 2000) vývoj nového digitálního slunečního čidla pro nové družice, vývoj pozemních měřicích přístrojů (měření množství námrazy, rosy) a spoluúčast na vývoji Dopplerovského systému pro měření pohybů v ionosféře.

Vědecká činnost

Od roku 2001 postupně zapojen do vědeckého výzkumu, který v současnosti převažuje.

Jaroslav Chum se zabývá fyzikou plazmatu blízkého okolí Země, zaměřuje se převážně na šíření vln v magnetosféře a ionosféře Země. Okruhy jeho zájmu jsou zejména:

• Hvizdové vlny vybuzené blesky
• Emise typu Chorus
• Geomagnetické pulzace
• Atmosférické gravitační vlny a infrazvuk v zemské atmosféře a ionosféře.

J. Chum  je autorem několika více než 30 publikací v mezinárodních recenzovaných časopisech.

Vybrané publikace:

• Fagre, M., Zossi, B.S., Chum, Jaroslav, Elias, A. G., 2020: Simulated high frequency ray paths considering traveling ionospheric disturbances, SN Applied Sciences, 2, č. článku 615
• Chum, Jaroslav, Langer, R., Baše, Jiří, Kollárik, M., Strhárský, I., Diendorfer, G., Rusz, Jan, 2020: Significant enhancements of secondary cosmic rays and electric field at the high mountain peak of Lomnický Štít in High Tatras during thunderstorms, Earth, Planets and Space, 72, March, č. článku 28
• Fagre, M., Zossi, B.S., Chum, Jaroslav, Yiğ,it, E., Elias, A. G., 2020: Comparative Study of Equatorial and High-Latitude Over-The-Horizon Radar Parameters Using Ray-Tracing Simulations, IEEE Geoscience and Remote Sensing Letters, in press
• Mošna, Zbyšek, Kouba, Daniel, Koucká Knížová, Petra, Burešová, Dalia, Chum, Jaroslav, Šindelářová, Tereza, Urbář, Jaroslav, Boška, Josef, Saxonbergová-Jankovičová, Dana, 2020: Ionospheric storm of September 2017 observed at ionospheric station Pruhonice, the Czech Republic, Advances in Space Research, 65, 1, pp. 115-128
• Fagre, M., Zossi, B.S., Chum, Jaroslav, Yigit, E., Elias, A. G., 2019: Ionospheric high frequency wave propagation using different IRI hmF2 and foF2 models, Journal of Atmospheric and Solar-Terrestrial Physics, 196, Dec, č. článku 105141
• Liu, J-Y., Chen, Ch-Y., Sun, Y. Y., Lee, I-T., Chum, Jaroslav, 2019: Fluctuations on vertical profiles of the ionospheric electron density perturbed by the March 11, 2011 M9.0 Tohoku earthquake and tsunami, GPS Solutions, 23, 3, č. článku 76
• Liu, J. Y., Yang, S.S., Rajesh, P.K., Sun, Y.Y., Chum, Jaroslav, Pan, C.J., Chu, Y.H., Chao, C.K., Chang, L.C. , 2019: Ionospheric Response to the 21 May 2012 Annular SolarEclipse Over Taiwan, Journal of Geophysical Research: Space Physics, 124, 5, pp. 3623-3636
• Nicoll, K.A., Harrison, R.G., Barta, V., Bór, J., Brugge, R., Chillingarian, A., Chum, Jaroslav, Georgoulias, A.K., Guha, A., Kourtidis, K., Kubicki, M., Mareev, E., Matthews, J., Mkrtchyan, H., Odzimek, A., Raulin, J.-P., Robert, D., Silva, H.G., Tacza, J., Yair, Y., Yaniv, R. , 2019: A global atmospheric electricity monitoring network for climate and geophysical research, Journal of Atmospheric and Solar-Terrestrial Physics, 184, March, pp. 18-29
• Chum, Jaroslav, Urbář, Jaroslav, Laštovička, Jan, Cabrera, M. A., Liu, J.-Y., Bonomi, F. A. M., Fagre, M., Fišer, Jiří, Mošna, Zbyšek, 2018: Continuous Doppler sounding of the ionosphere during solar flares, Earth, Planets and Space, 70, č. článku 198
• Chum, Jaroslav, Podolská, Kateřina, 2018: 3D analysis of GW propagation in the ionosphere, Geophysical Research Letters, 45, 21, pp. 11562-11571
• Mošna, Zbyšek; Boška, Josef; Koucká Knížová, Petra; Šindelářová, Tereza; Kouba, Daniel; Chum, Jaroslav; Rejfek, Luboš; Potužníková, Kateřina; Arikan, F.; Toker, C., 2018: Observation of the solar eclipse of 20 March 2015 at the Pruhonice station, Journal of Atmospheric and Solar-Terrestrial Physics, 171, June, pp. 277-284
• Chum, Jaroslav, Liu, J.-Y., Podolská, Kateřina, Šindelářová, Tereza, 2018: Infrasound in the ionosphere from earthquakes and typhoons, Journal of Atmospheric and Solar-Terrestrial Physics, 171, Special Issue, pp. 72-82
• Kouba, Daniel, Chum, Jaroslav, 2018: Ground-based measurements of ionospheric dynamics, Journal of Space Weather and Space Climate, 8, MAY, A29
• Šindelářová, Tereza, Mošna, Zbyšek, Chum, Jaroslav, Kouba, Daniel, Baše, Jiří, Liu, J. Y., Katamzi-Joseph, Z., 2018: Solar eclipse effects in the ionosphere observed by continuous Doppler sounding, Advances in Space Research, 62, 4, pp. 785-800
• Blanc, E., Ceranna, L., Hauchecorne, A., Charlton-Perez, A., Marchetti, E., Evers, L.G., Kvaerna, T., Laštovička, Jan, Eliasson, L., Crosby, N. B., Blanc-Benon, P., Le Pichon, A., Brachet, N., Pilger, C., Keckhut, P., Assink, J.D., Smets, P. S. M., Lee, C. F., Kero, J., Šindelářová, Tereza, Kämpfer, N., Rüfenacht, R., Farges, T., Millet, C., Näsholm, S. P., Gibbons, S. J., Espy, P. J., Hibbins, R. E., Heinrich, P., Ripepe, M., Khaykin, S., Mze, N., Chum, Jaroslav, 2018: Toward an Improved Representation of Middle Atmospheric Dynamics Thanks to the ARISE Project, Surveys in Geophysics, 39, 2, pp. 171-225
• Kudela, Karel; Chum, Jaroslav; Kollárik, M.; Langer, R.; Strhárský, I.; Baše, Jiří, 2017: Correlations Between Secondary Cosmic Ray Ratesand Strong Electric Fields at Lomnický štít, Journal of Geophysical Research: Atmospheres , 122, 20, pp. 10,700–10,710
• Laštovička, Jan; Chum, Jaroslav, 2017: A review of results of the international ionospheric Doppler sounder network, Advances in Space Research, 44, 16, pp. 8186-8172
• Fišer, Jiří, Chum, Jaroslav, Liu, J. Y., 2017: Medium-scale traveling ionospheric disturbances over Taiwan observed with HF Doppler sounding, Earth Planets and Space, 69, 1, pp. č. článku 131
• Barta, V.; Haldoupis, C.; Sátori, G.; Burešová, Dalia; Chum, Jaroslav; Pozoga, M.; Berényi, K. A.; Bór, J.; Popek, Martin; Kis, Á.; Bencze, P., 2017: Searching for effects caused by thunderstorms in midlatitude sporadic E layers, Journal of Atmospheric and Solar-Terrestrial Physics , 161, August, pp. 150-159
• Chum, Jaroslav; Cabrera, M. A.; Mošna, Zbyšek; Fagre, M.; Baše, Jiří; Fišer, Jiří, 2016: Nonlinear acoustic waves in the viscous thermosphere and ionosphere above earthquake, Journal of Geophysical Research: Space Physics, 121, 12, pp. 126–137
• Šindelářová, Tereza; Kozubek, Michal; Chum, Jaroslav; Potužníková, Kateřina, 2016: Seasonal and diurnal variability of pressure fluctuation in the infrasound frequency range observed in the Czech microbarograph network, Studia geophysica et geodaetica, 60, 4, pp. 747-762
• Liu, J. Y. ; Chen, C. H. ; Sun, Y. Y. ; Chen, C. H. ; Tsai, H. F. ; Yen, H. Y. ; Chum, Jaroslav ; Laštovička, Jan ; Yang, Q. S. ; Chen, S. W. ; Wen, S., 2016: The vertical propagation of disturbances triggered by seismic waves of the 11 March 2011 M9.0 Tohoku earthquake over Taiwan, Geophysical Research Letters, 43, 4 , pp. 1759-1765
• Chum, Jaroslav ; Liu, J.-Y. ; Chen, S.-P. ; Cabrera, M. A. ; Laštovička, Jan ; Baše, Jiří ; Burešová, Dalia ; Fišer, Jiří ; Hruška, František ; Ezquer, R., 2016: Spread F occurrence and drift under the crest of the equatorial ionization anomaly from continuous Doppler sounding and FORMOSAT-3/COSMIC scintillation data, Earth, Planets and Space, 68, pp. 56
• Chum, Jaroslav ; Liu, J.-Y. ; Laštovička, Jan ; Fišer, Jiří ; Mošna, Zbyšek ; Baše, Jiří ; Sun, Y.-Y., 2016: Ionospheric signatures of the April 25, 2015 Nepal earthquake and the relative role of compression and advection for Doppler sounding of infrasound in the ionosphere, Earth, Planets and Space, 68, 24
• Krasnov, V. M. ; Drobzheva, Ya. V. ; Chum, Jaroslav, 2015: Far-field coseismic ionospheric disturbances of Tohoku earthquake, Journal of Atmospheric and Solar-Terrestrial Physics, 135, December, pp. 12–21
• 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

Projekty:

• GA ČR GA18-01969S, Atmosférické vlny: dynamika a vazby mezi vrstvami, 2018-2020. Řešitel: Chum, J. Detaily
• GA ČR. GC15-07281J, Jevy spojující neutrální a ionizovanou atmosféru, 2015–2017. Řešitel: Chum, J. Detaily
• HORIZON 2020, projekt ARISE2, Atmospheric dynamics Research InfraStructure in Europe 2, 2015-2018. Řešitel: Laštovička, J., tým: Šindelářová T. - member of Management Committee, Chum J., Baše J., Fišer J., Hruška F., Obrazová (Burešová) D. Detaily
• GA ČR. GA205/09/1253, Elektromagnetické jevy spojující troposféru, mezosféru, ionosféru a magnetosféru, 2009-2013. Řešitel: Chum, J. Detaily

Další informace:

• člen atestační a knihovní komise
• od roku 2012 člen Rady ústavu