Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Joseph M. Grebowsky"'
Autor:
James P. McFadden, David L. Mitchell, Marissa F. Vogt, Mehdi Benna, Bruce M. Jakosky, Paul Withers, Robert Lillis, Joseph M. Grebowsky, Glyn Collinson, Jared Espley
Publikováno v:
Nature Astronomy. 4:486-491
Understanding and predicting processes that perturb planetary ionospheres is of paramount importance for long-distance radio communication. Perhaps the oldest known ionospheric disturbances are ‘sporadic E layers’1: unpredictable and short-lived
Autor:
Joseph M. Grebowsky, Glyn Collinson, James P. McFadden, Bruce M. Jakosky, Mehdi Benna, David Mitchell, Jared Espley
Publikováno v:
Geophysical Research Letters. 46:4554-4563
Autor:
Joseph M. Grebowsky, Shaosui Xu, Glyn Collinson, Alex Glocer, David L. Mitchell, Bruce M. Jakosky, Laila Andersson, R. A. Frahm
Publikováno v:
Geophys Res Lett
We test the hypothesis that their dominant driver of a planetary ambipolar electric field is the ionospheric electron pressure gradient (∇P(e)). The ionospheres of Venus and Mars are mapped using Langmuir probe measurements from NASA’s Pioneer Ve
Autor:
Jasper Halekas, Christian Mazelle, Joseph M. Grebowsky, Nick Omidi, David L. Mitchell, Suranga Ruhunusiri, R. A. Frahm, Glyn Collinson, Jared Espley, David G. Sibeck, Christopher M. Fowler, Yoshifumi Futaana, Lynn B. Wilson, Bruce Jakosky, Tielong Zhang
Publikováno v:
Journal of Geophysical Research: Space Physics
Journal of Geophysical Research: Space Physics, 2018, 123, pp.7241-7256. ⟨10.1029/2018JA025414⟩
Journal of Geophysical Research: Space Physics, 2018, 123, pp.7241-7256. ⟨10.1029/2018JA025414⟩
International audience; Using data from the National Aeronautics and Space Administration Mars Atmosphere and Voltatile EvolutioN and the European Space Agency Mars Express spacecraft, we show that transient phenomena in the foreshock and solar wind
Autor:
Joseph M. Grebowsky, Bruce M. Jakosky, Jasper Halekas, Glyn Collinson, Nick Omidi, Yoshifumi Futaana, Tielong Zhang, Moa Persson, David L. Mitchell, Jared Espley, David G. Sibeck
Publikováno v:
Journal of Geophysical Research: Space Physics. 122:9910-9923
We report the first observations of Spontaneous Hot Flow Anomalies (SHFAs) at Venus and Mars, demonstrating their existence in the foreshocks of other planets beyond Earth. Using data from the ESA Venus Express and the NASA Mars Atmosphere and Volati
Autor:
Bruce M. Jakosky, Robert Lillis, Yingjuan Ma, Xiaohua Fang, Jasper Halekas, K. Masunaga, Yaxue Dong, Chuanfei Dong, John E. P. Connerney, Joseph M. Grebowsky, David Brain
Publikováno v:
Journal of Geophysical Research: Space Physics. 122:4117-4137
We present results from a global Mars time-dependent MHD simulation under constant solar wind and solar radiation impact considering inherent magnetic field variations due to continuous planetary rotation. We calculate the 3-D shapes and locations of
Autor:
Joseph M. Grebowsky, Michael W. Liemohn, Shaosui Xu, Glyn Collinson, Robert Lillis, David L. Mitchell, Bruce M. Jakosky, Jared Espley, Alex Glocer, Takuya Hara, A. Fedorov, Christian Mazelle, J. A. Sauvaud, Laila Andersson
Publikováno v:
Journal of Geophysical Research: Space Physics
Journal of Geophysical Research: Space Physics, 2017, 122, pp.2260-2271. ⟨10.1002/2016JA023589⟩
Journal of Geophysical Research: Space Physics, 2017, 122, pp.2260-2271. ⟨10.1002/2016JA023589⟩
International audience; Parallel electric fields and their associated electric potential structures play a crucial role in ionospheric-magnetospheric interactions at any planet. Although there is abundant evidence that parallel electric fields play k
Autor:
Stas Barabash, T. L. Zhang, George V. Khazanov, Glyn Collinson, R. A. Frahm, Andrei Fedorov, Thomas E. Moore, Tom Nordheim, David L. Mitchell, Lin Gilbert, Shawn Domagal-Goldman, Andrew J. Coates, John D. Winningham, W. K. Peterson, Yoshifumi Futaana, Alex Glocer, Joseph M. Grebowsky
Publikováno v:
Geophysical Research Letters. 43:5926-5934
Understanding what processes govern atmospheric escape and the loss of planetary water is of paramount importance for understanding how life in the universe can exist. One mechanism thought to be important at all planets is an “ambipolar” electri
Autor:
Yingjuan Ma, Jared Espley, Andrew F. Nagy, John E. P. Connerney, Yaxue Dong, Chuanfei Dong, David L. Mitchell, David Brain, Mehdi Benna, Janet G. Luhmann, Bruce M. Jakosky, James P. McFadden, Paul R. Mahaffy, Robert Lillis, Shannon Curry, Gina A. DiBraccio, Gabor Toth, Joseph M. Grebowsky, Jasper Halekas, Stephen W. Bougher
Publikováno v:
Geophysical Research Letters. 42:9103-9112
We study the solar wind interaction with the Martian upper atmosphere during the 8 March 2015 interplanetary coronal mass ejection (ICME) by using a global multifluid MHD model. Comparison of the simulation results with observations from Mars Atmosph
Autor:
John E. P. Connerney, Yingjuan Ma, Bruce M. Jakosky, Robert Lillis, Christian Mazelle, J. A. Sauvaud, Joseph M. Grebowsky, Laila Andersson, Alex Glocer, Andrei Fedorov, W. K. Peterson, Robert E. Ergun, Glyn Collinson, David L. Mitchell, Steven Bougher, Jared Espley
Publikováno v:
Geophysical Research Letters. 42:9128-9134
An important mechanism in the generation of polar wind outflow is the ambipolar electric potential which assists ions in overcoming gravity and is a key mechanism for Terrestrial ionospheric escape. At Mars, open field lines are not confined to the p