Skip to Main content Skip to Navigation
Journal articles

Observations of atomic deuterium in the mesosphere from ATLAS 1 with ALAE Instrument

Abstract : During the first ATLAS mission, the ALAE Lyman α spectrophotometer collected various measurements of hydrogen and deuterium atoms, from the mesosphere, the thermosphere, the exosphere and the interplanetary medium. In this paper is presented a preliminary analysis of some observations of atomic deuterium, which Lyman α emission is excited by resonance scattering of solar photons. Nadir measurements along the sunlit Earth part of the orbit show that the emission changes as a function of solar zenith angle. Comparison with a simple model shows that, from the shuttle altitude of 300 km and at low solar zenith angles, the line‐of‐sight probes atomic deuterium down to 80 km of altitude (where O 2 absorption is complete), whereas at angles from 60° to 90°, the mesospheric part of the emission progressively vanishes. Then, the remaining emission mainly consist of the thermospheric part (z ≥ 100 km). This type of observations provides a sounding of atomic deuterium at its peak production and concentration, and D atoms can be used as a proxy to H atoms (which cannot be observed from a satellite) in this particularly active region of the mesosphere.
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-02889811
Contributor : Catherine Cardon <>
Submitted on : Wednesday, February 3, 2021 - 8:51:07 AM
Last modification on : Thursday, February 4, 2021 - 3:30:00 AM
Long-term archiving on: : Tuesday, May 4, 2021 - 6:18:09 PM

File

ark _67375_WNG-TN5LL6XQ-2.pdf
Publisher files allowed on an open archive

Identifiers

Citation

Jean-Loup Bertaux, Eric Quémerais, Florence Goutail, Gaston Kockarts, Bill R. Sandel. Observations of atomic deuterium in the mesosphere from ATLAS 1 with ALAE Instrument. Geophysical Research Letters, American Geophysical Union, 1993, 20 (6), pp.507-510. ⟨10.1029/93GL00077⟩. ⟨insu-02889811⟩

Share

Metrics

Record views

80

Files downloads

36