|
|
Robert H. HolzworthProfessor of Earth & Space Science and Adjunct Professor of Physics |
Earth and Space Sciences
Room
263 Johnson Hall
(206) 685-7410 (office)
(206) 685-3815 (fax)
bobholz@washington.edu
COS Profile at http://myprofile.cos.com/holzworr79
Pictures from my voyage/Fall 2004
Pictures from
the MASS rocket campaign,
Ph.D., Physics, University of California, Berkeley, 1977.
Asst. Res. Physicist, Space Science Lab, UC Berkeley, 1977 - 8.
Member of the Technical Staff, Space Science Lab, The Aerospace Corp., Los
Angeles, 1978-82
UW Faculty since 1982
Experimental space plasma physics,
atmospheric and magnetospheric electrodynamics, middle atmosphere
electrodynamics, thunderstorm and lightning electrodynamics.
LOOKING FOR A NEW RESE
My research involves the experimental investigation of electrical parameters in the Earth's environment, in particular, the study of the electromagnetic energy flow that couples separated environments such as the atmosphere, the ionosphere, and the magnetosphere. Active projects include: CAREII dusty-plasma rocket experiment Electric field measurements in F-region ionosphere to be launched from Norway in 2013 (NRL support); C/NOFS Optical Lightning Detector in the VEFI electric field experiment launched Apr 2008 into equatorial orbit to study ionospheric irregularities (NASA and USAF sponsored), and real time global lightning studies using VLF techniques with the WWLL (World Wide Lightning Location network) (see wwlln.net for more information) and experiments to use lightning as a powerful radar to probe the D-region. Additionally, proposals in the works for new balloon flights.
Students are encouraged to be vitally involved in hardware projects and data analysis in all of these research areas. All instruments are built in our lab by the students or the professional engineering staff. Most projects include the opportunity for student travel.
Email Bob at bobholz@ess.washington.edu .
PUBLICATIONS
since 2004 (from a total list of over 100)
WWLL
global lightning detection system: Regional validation study in
A New
High-Voltage Electric Field Instrument for Studying Sprites, IEEE TRANSACTIONS
ON GEOS
Electric field
measurements in noctilucent clouds, JOURNAL OF
GEOPHYSICAL RESEARCH, VOL. 109, D16203, doi:10.1029/2003JD004468,
2004, (with R. L. Goldberg)
C/NOFS: a Mission to
Forecast Scintillations, JASTP, (accepted and in press, 2004 (with O. de
La Beaujardire and the rest of the C/NOFS science
definition team)
Potential distribution
around sounding rockets in mesospheric layers with charged aerosol particles,
GEOPHYSICAL RESEARCH LETTERS, accepted, Oct. 2004, (In press) (with Z. Sternovsky, M. Horányi and S.
Robertson)
Balloon Observations
of Temporal and Spatial Fluctuations in Stratospheric Conductivity, Submitted
to Elsevier Science, October, 2004,
(with Edgar A. Bering, III, Brandon D. Reddell ,
Michael F. Kokorowski , Akira Kadokura
, Hisao Yamagishi , Natsuo Sato, Masaki Ejiri, Haruto Hirosawa, Takamasa Yamagami, Shoji Torii,
Fumio Tohyamaf, Michio
Nakagawa, and Toshimi Okada
Strong electric fields
from positive lightning strokes in the stratosphere, Geophys.
Res. Lett., V. 32, L04809, doi:10.1029/2004GL021554, 2005 (with M. P. McCarthy, J. N. Thomas, J. Chin, T. M. Chinowsky, M. J. Taylor, and O. Pinto Jr.,)
Latitude gradients in the natural variance in
stratospheric conductivity - Implications for studies of long-term changes
Source: Advances in Space Research, v 35, n 8
.Lightning sferics and stroke-delayed pulses measured in the stratosphere:
Implications for mesospheric currents, Geophysical Res. Lett,
VOL. 32, L22807, doi:10.1029/2005GL024629,
2005 (with Thomas, Jeremy N, Michael
P. McCarthy, and Osmar Pinto Jr)
Balloon observations
of temporal variation in the global circuit compared to global lightning
activity, Advances in Space Research 36 (2005)
2223–2228
Predicting lightning-driven
quasi-electrostatic fields at sprite altitudes usin
in situ measurements and a numerical model, Geophysical
Research Letters, v 32, n 10,
Balloon observations of temporal and spatial fluctuations in stratospheric conductivity, Advances in Space Research, v 35, n 8, 2005, p 1434-49 (with Bering, E.A., III, Reddell, B.D. ; Kokorowski, M.F.; Kadokura, A.; Yamagishi, H.; Sato, N.; Ejiri, M.; Hirosawa, H.; Yamagami, T.; Torii, S.; Tohyama, F.; Nakagawa, M.; Okada, T.,)
Rapid fluctuations of stratospheric electric
field following a solar energetic particle event, Geophysical Research
Letters, v 33, n 20, 28 Oct. 2006,
p 6 pp (with Kokorowski, M., Sample,
J.G.., Bering, E.A.; Bale, S.D.; Blake, J.B.; Collier, A.B.; Hughes, A.R.W.;
Lay, E.; Lin, R.P.; McCarthy, M.P.; Millan, R.M.; Moraal, H.; O'Brien, T.P.; Parks, G.K.; Pulupa,
M.; Reddell, B.D.; Smith, D.M.; Stoker, P.H.; Woodger, L.)
Detection efficiency of the
VLF World-Wide Lightning Location Network (WWLLN): initial case study,
Ann. Geophys., 24, 3197–3214, 2006 (with Rodger, C.
J., S. Werner, J. B. Brundell, E. H. Lay, N. R.
Thomson, and R. L. Dowden)
Performance assessment of
the World Wide Lightning Location Network (WWLLN), using the Los Alamos Sferic Array (LASA) as ground truth Source: Journal of Atmospheric and Oceanic Technology,
v 23, n 8, Aug. 2006, p 1082-92
(with Jacobson, A.R., Harlin,
J.; Dowden, R.; Lay, E.)
A Very
Active Sprite-Producing Storm Observed Over Argentina, Eos, Vol. 88, No. 10, 6 March 2007, PAGES 117–128 (My post doc) (with
Thomas, Jeremy N; Michael J. Taylor, Dominique Pautet,
and Matthew Bailey,; Natalia N. Solorzano,,
Michael P. McCarthy, Michael Kokorowski, Fernanda Sao Sabbas, Osmar Pinto Jr; Steven A. Cummer, Nicolas Jaugey, and Jingbo Li, Nelson Jorge Schuch)
Local Time Variation in Land/Ocean Lightning Count
Rates as Measured by the World Wide Lightning Location Network, Journal of Geophysical Research-Part D-Atmospheres, v
112, n 13, 16 July 2007, p
D13111-1-9
(with Lay, Erin, H., Abram R. Jacobson, Craig J.
Rodger, and Richard L. Dowden)
Low-frequency ionospheric
sounding with Narrow Bipolar Event lightning radio emissions:
energy-reflectivity spectrum, Ann. Geophys., 26,
1793-1803, 2008 (with Jacobson
A. R. and X.-M. Shao)
Rare Measurements
of a Sprite with Halo Event Driven by a Negative Lightning Discharge Over
Magnetospheric electric
field variations caused by storm-time shock fronts, Advances in Space Research,
v 42, n 1, 1 July 2008, p 181-91 (with Kokorowski, M., Bering, E.A., III; Ruohoniemi,
M.; Sample, J.G..; Bale, S.D.; Blake, J.B.; Collier, A.B.; Hughes, A.R.W.; Lay,
E.H.; Lin, R.P.; McCarthy, M.P.; Millan, R.M.; Moraal, H.; O'Brien, T.P.; Parks, G.K.; Pulupa,
M.; Reddell, B.D.; Smith, D.M.; Stoker, P.H.; Woodger,)
In situ measurements of
contributions to the global electrical circuit by a thunderstorm in
southeastern
Lightning-driven electric fields measured in the lower
ionosphere: Implications for transient luminous events, J. Geophys.
Res. (Space Physics) Accepted and in press, (2008JA013567R), 2008 (with Thomas, J. N., B. H. Barnum, E. H. Lay,
M. Co and M. C. Kelley)
Full-wave
reflection of lightning long-wave radio pulses from the ionospheric D region:
Numerical model with Abram R. Jacobson, and Xuan-Min Shao, , JOURNAL OF GEOPHYSICAL RES
Electric field measurements in a NLC/PMSE region during the MASS/ECOMA campaign, with M. Shimogawa, Ann. Geophys., 27, 1423–1430, 2009
Mass analysis of charged aerosol particles in NLC and PMSE during the ECOMA/MASS campaign, with
Robertson,
S., M. Horanyi,
S. Knappmiller, Z. Sternovsky,
M. Shimogawa, M. Friedrich, K. Torkar, J. Gumbel, L. Megner, G. Baumgarten, R. Latteck, M. Rapp,
U.-P. Hoppe, and M. E. Hervig, Ann. Geophys., 27, 1213–1232, 2009
Simultaneous observations of Pc 1 micropulsation activity and stratospheric electrodynamic perturbations on 27 January 2003, with Bering,
E.; Engebretson,
M. ; Holzworth, R.; Kadokura, A.; Kokorowski,
M.; Reddell, B.; Posch, J.;
Yamagishi, H., , Advances
in Space Research, v 43, n 5, p 802-818, March 2, 2009
Spectral dependence of terrestrial gamma-ray flashes on source distance, with Hazelton B. J., B. W. Grefenstette, D. M. Smith, J. R. Dwyer, X.-M. Shao, S. A. Cummer, T. Chronis, and E. H. Lay, (2009), , Geophys. Res. Lett., 36, L01108, doi:10.1029/2008GL035906.
Characteristics, of an African Easterly Wave Observed During NAMMA, with Cifelli, Robert, Timothy Lang, Steven A. Rutledge,
Nick Guy, Edward J. Zipser, and Jon Zawislak, Journal of
the Atmospheric Sciences, Vol. 67,
No. 1, pp. 3-25, January 2010.
Polarity and energetics of inner core lightning
in three intense
Growing detection efficiency
of the world wide lightning location network,
with Rodger, C.J., Brundell,
J.B.;and Lay, E.H, , AIP Conference Proceedings (refereed), v 1118, p 15-20, 2009.
Full-wave reflection of
lightning long-wave radio pulses from the
ionospheric D-region: Comparison with
Ground-based detection of sprites
and their parent lightning flashes over Africa during the 2006 AMMA campaign, with E. R. Williams, W. A. Lyons, Y. Hobara, V. C. Mushtak, N. Asencio, R. Boldi, J. Bór, S. A. Cummer, E. Greenberg,
M. Hayakawa, V. Kotroni, J. Li, C. Morales, T. E.
Nelson, C. Price, B. Russell, M. Sato, G. Sátori, K. Shirahata, Y. Takahashi, K. Yamashita, , Q. J. R. Meteorol. Soc. (2009), DOI: 10.1002/qj.489
First Results on Terrestrial Gamma-ray Flashes from 1the Fermi Gamma-ray Burst Monitor, withBriggs, M. S., G. J. Fishman, V. Connaughton, P. N. Bhat, W. S. Paciesas, R. D. Preece, C. Wilson‐Hodge, V. L. Chaplin, R. M. Kippen, A. von Kienlin, C. A. Meegan, E. BissaldJ. R. Dwyer, D. M. Smith, J. E. Grove, and A. Chekhtman, , . Geophys. Res., VOL. 115, A07323, doi:10.1029/2009JA015242, 2010
Lightning-generated NOx seen by
Associations between Fermi Gamma‐ray Burst Monitor terrestrial gamma ray flashes and sferics from the World Wide Lightning Location Network with Connaughton, V., M. S. Briggs, M. L. Hutchins, G. J. Fishman, C. A. Wilson‐Hodge, V. L. Chaplin, P. N. Bhat, J. Greiner, A. von Kienlin, R. M. Kippen, C. A. Meegan, W. S. Paciesas, R. D. Preece, E. Cramer, J. R. Dwyer, and D. M. Smith, , J. Geophys. Res, V. 115, A12307, doi:10.1029/2010JA015681, 2010.
A performance assessment of theWorldWide
Lightning Location Network (WWLLN) via comparison with the Canadian Lightning Detection Network (
Temporal-spatial
modeling of non-linear electron density enhancement due to successive lightning
strokes with Lay, Erin H. ,
Craig J. Rodger, Mengu Cho,
and Jeremy N. Thomas, JOURNAL OF G
Lightning-Generated Whistler Waves Observed by Probes
on the C/NOFS Satellite at Low Latitudes, with M. P. McCarthy, R. F. Pfaff, A. R. Jacobson, W. L.Willcockson and D. E. Rowland, J. Geo.
Res., 116, A06306, doi:10.1029/ 2010JA016198, 2011
Study of oblique whistlers in the low-latitude ionosphere, jointly with the C/NOFS satellite and theWorld-Wide Lightning Location Network with Jacobson, A. R., R. F. Pfaff, and M. P. McCarthy, , Ann. Geophys., 29, 851–863, doi:10.5194/angeo-29-851-2011, 2011
Daily and intraseasonal relationships between lightning and NO2 over the Maritime Continent, with Katrina S Virts, Joel A. Thornton, John M. Wallace, Michael L. Hutchins, and Abram R. Jacobson, Geophys. Res. Lett., V. 38, L19803, doi:10.1029/2011GL048578, 2011
Observations of multi-microsecond VHF pulsetrains in intracloud lightning discharges, with, A. R Jacobson. and X.-M. Shao, , Ann. Geophys., 29, 1587–1604, 2011.
Initial studies with the Lightning Detector on the C/NOFS satellite, and cross-validation with WWLLN, with A. R. Jacobson, M. P. McCarthy, and R. P.Pfaff, Journal of Atmospheric and Oceanic Technology (JTech) DOI: 10.1175/JTECH-D-11-00047.1, V. 28, p. 1423, 2011
(updated Nov 2011)
|
|
ESS Home Page. |
![[To Geophysics Page]](home.gif){kind=small}