Ionospheric Plasma Depletions at Mars Observed by the MAVEN Spacecraft
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10456695" target="_blank" >RIV/00216208:11320/22:10456695 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=kF1U1yfsUY" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=kF1U1yfsUY</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2022JE007302" target="_blank" >10.1029/2022JE007302</a>
Alternative languages
Result language
angličtina
Original language name
Ionospheric Plasma Depletions at Mars Observed by the MAVEN Spacecraft
Original language description
The Martian ionosphere, modulated by the solar wind from the topside and remnant crustal magnetic fields close to the surface, possesses unique structures different from Earth and Venus. Integrated observations by the plasma and magnetic field instruments onboard the Mars Atmosphere and Volatile Evolution spacecraft show evidence of ionospheric plasma depletions, independent of seasonal variations at Mars. During such depletions, the density of all ionospheric ion species is reduced by more than an order of magnitude, and, at the same time, the electron temperature increases abruptly. An automated algorithm for the identification of such plasma depletions is developed. Altogether, as many as 1,125 events are identified in 8,618 orbits available from October 2014 to May 2021. A statistical investigation of these events reveals that they are more prominent on the nightside, where they seem to occur primarily in the southern hemisphere, possibly in regions with strong crustal magnetic fields. While the dayside events occur mainly at altitudes above about 250 km, nightside event altitudes are typically lower. Considering the relation between spacecraft velocity and observed event duration, we suggest that the depletions are bubble-like structures, more elongated horizontally than vertically. A possible mechanism of their formation is discussed.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
<a href="/en/project/LTAUSA17070" target="_blank" >LTAUSA17070: Electromagnetic waves in planetary ionospheres and magnetospheres</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Geophysical Research. Planets
ISSN
2169-9097
e-ISSN
2169-9100
Volume of the periodical
127
Issue of the periodical within the volume
11
Country of publishing house
US - UNITED STATES
Number of pages
14
Pages from-to
e2022JE007302
UT code for WoS article
000878453800001
EID of the result in the Scopus database
2-s2.0-85142912384