Felsic highland crust on Venus suggested by Galileo Near-Infrared Mapping Spectrometer data

Joji Hashimoto, Maarten Roos-Serote, Seiji Sugita, Martha S. Gilmore, Lucas W. Kamp, Robert W. Carlson, Kevin H. Baines

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

[1] We evaluated the spatial variation of Venusian surface emissivity at 1.18 μm wavelength and that of near-surface atmospheric temperature using multispectral images obtained by the Near-Infrared Mapping Spectrometer (NIMS) on board the Galileo spacecraft. The Galileo NIMS observed the nightside thermal emission from the surface and the deep atmosphere of Venus, which is attenuated by scattering from the overlying clouds. To analyze the NIMS data, we used a radiative transfer model based on the adding method. Although there is still an uncertainty in the results owing to the not well known parameters of the atmosphere, our analysis revealed that the horizontal temperature variation in the near-surface atmosphere is no more than ±2 K on the Venusian nightside and also suggests that the majority of lowlands likely has higher emissivity compared to the majority of highlands. One interpretation for the latter result is that highland materials are generally composed of felsic rocks. Since formation of a large body of granitic magmas requires water, the presence of granitic terrains would imply that Venus may have had an ocean and a mechanism to recycle water into the mantle in the past.

Original languageEnglish
Pages (from-to)E00B24-E00B24
Number of pages1
JournalJournal of Geophysical Research B: Solid Earth
Volume114
Issue number5
DOIs
Publication statusPublished - May 2009
Externally publishedYes

Fingerprint

highlands
Venus (planet)
Venus
Spectrometers
crusts
near infrared
spectrometer
spectrometers
crust
emissivity
Infrared radiation
atmospheres
atmosphere
Galileo spacecraft
atmospheric temperature
multispectral image
felsic rock
thermal emission
Atmospheric temperature
radiative transfer

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Cite this

Hashimoto, J., Roos-Serote, M., Sugita, S., Gilmore, M. S., Kamp, L. W., Carlson, R. W., & Baines, K. H. (2009). Felsic highland crust on Venus suggested by Galileo Near-Infrared Mapping Spectrometer data. Journal of Geophysical Research B: Solid Earth, 114(5), E00B24-E00B24. https://doi.org/10.1029/2008JE003134

Felsic highland crust on Venus suggested by Galileo Near-Infrared Mapping Spectrometer data. / Hashimoto, Joji; Roos-Serote, Maarten; Sugita, Seiji; Gilmore, Martha S.; Kamp, Lucas W.; Carlson, Robert W.; Baines, Kevin H.

In: Journal of Geophysical Research B: Solid Earth, Vol. 114, No. 5, 05.2009, p. E00B24-E00B24.

Research output: Contribution to journalArticle

Hashimoto, J, Roos-Serote, M, Sugita, S, Gilmore, MS, Kamp, LW, Carlson, RW & Baines, KH 2009, 'Felsic highland crust on Venus suggested by Galileo Near-Infrared Mapping Spectrometer data', Journal of Geophysical Research B: Solid Earth, vol. 114, no. 5, pp. E00B24-E00B24. https://doi.org/10.1029/2008JE003134
Hashimoto, Joji ; Roos-Serote, Maarten ; Sugita, Seiji ; Gilmore, Martha S. ; Kamp, Lucas W. ; Carlson, Robert W. ; Baines, Kevin H. / Felsic highland crust on Venus suggested by Galileo Near-Infrared Mapping Spectrometer data. In: Journal of Geophysical Research B: Solid Earth. 2009 ; Vol. 114, No. 5. pp. E00B24-E00B24.
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