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    Detection of Mesospheric CO2 Ice Clouds on Mars in Southern Summer

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    Name:
    Jiang_et_al-2019-Geophysical_R ...
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    Description:
    Final Published Version
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    Author
    Jiang, F. Y.
    Yelle, Roger V.
    Jain, S. K.
    Cui, J. cc
    Montmessin, F. cc
    Schneider, N. M. cc
    Deighan, J.
    Gröller, H. cc
    Verdier, L.
    Affiliation
    Univ Arizona, Lunar & Planetary Lab
    Issue Date
    2019-07-19
    
    Metadata
    Show full item record
    Publisher
    AMER GEOPHYSICAL UNION
    Citation
    Jiang, F. Y., Yelle, R. V., Jain, S. K., Cui, J., Montmessin, F., Schneider, N. M., et al. (2019). Detection of mesospheric CO2 ice clouds on Mars in southern summer. Geophysical Research Letters, 46, 7962–7971. https://doi.org/10.1029/2019GL082029
    Journal
    GEOPHYSICAL RESEARCH LETTERS
    Rights
    Copyright © 2019. American Geophysical Union. All Rights Reserved.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    This paper reports the first detections of two high-altitude nighttime CO2 clouds on Mars during southern summer (L-s = 264 degrees and L-s = 330 degrees) with stellar occultation measurements by the Imaging Ultraviolet Spectrograph on board the Mars Atmosphere and Volatile Evolution spacecraft. Interpretation of the transmission spectra with Mie theory indicates particle radii of similar to 90-110 nm assuming a monodisperse distribution. The altitude profile of extinction indicates that the cloud layers are confined horizontally to sizes less than similar to 500-700 km. Examination of the CO2 density and temperature profiles reveals strong wave-like perturbations. Supersaturated temperatures occur at the maximum negative extent of these wave-like perturbations, which are organized in longitude with a dominant m = 3 zonal harmonic. This suggests that tides are important in the formation of CO2 clouds.
    Note
    6 month embargo; published online: 19 July 2019
    ISSN
    0094-8276
    DOI
    10.1029/2019gl082029
    Version
    Final published version
    Sponsors
    NASA through the MAVEN project; National Natural Science Foundation of China [41525015, 41774186]; National Science Foundation [ACI-1532235, ACI-1532236]; University of Colorado Boulder; Colorado State University
    ae974a485f413a2113503eed53cd6c53
    10.1029/2019gl082029
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