Imperial College London
Alternate

ProfessorMarinaGaland

Faculty of Natural Sciences, Department of Physics

Professor in Planetary Science
 
 
 
//

Contact

 

m.galand Website

 
 
//

Location

 

Huxley BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Cui:2015:10.1002/2014JA020788,
author = {Cui, J and Galand, M and Yelle, RV and Wei, Y and Zhang, S-J},
doi = {10.1002/2014JA020788},
journal = {Journal of Geophysical Research: Space Physics},
pages = {2333--2346},
title = {Day-to-night transport in the Martian ionosphere: Implications from total electron content measurements},
url = {http://dx.doi.org/10.1002/2014JA020788},
volume = {120},
year = {2015}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The nightside Martian ionosphere is thought to be contributed by day-to-night transport and electron precipitation, of which the former has not been well studied. In this work, we evaluate the role of day-to-night transport based on the total electron content (TEC) measurements made by the Mars Advanced Radar for Subsurface and Ionospheric Sounding on board Mars Express. This is accomplished by an examination of the variation of nightside TEC in the time domain rather than the traditional solar zenith angle domain. Our analyses here, being constrained to the Northern Hemisphere where the effects of crustal magnetic fields can be neglected, reveal that day-to-night transport serves as the dominant source for the nightside Martian ionosphere from terminator crossing up to time in darkness of ≈5.3 × 103 s, beyond which it is surpassed by electron precipitation. The observations are compared with predictions from a simplified time-dependent ionosphere model. We conclude that the solid body rotation of Mars is insufficient to account for the observed depletion of nightside TEC but the data could be reasonably reproduced by a zonal electron flow velocity of ≈1.9 km s−1.
AU  - Cui,J
AU  - Galand,M
AU  - Yelle,RV
AU  - Wei,Y
AU  - Zhang,S-J
DO  - 10.1002/2014JA020788
EP  - 2346
PY  - 2015///
SN  - 2169-9402
SP  - 2333
TI  - Day-to-night transport in the Martian ionosphere: Implications from total electron content measurements
T2  - Journal of Geophysical Research: Space Physics
UR  - http://dx.doi.org/10.1002/2014JA020788
UR  - http://hdl.handle.net/10044/1/27091
VL  - 120
ER  -
Download