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  • 1
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    Reconstructing Past Sea Ice (2013)
    Wiley
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    Publication Date: 2013-10-16
    Description: One obvious manifestation of changing climate has been the recent rapid reduction in the extent and volume of Arctic sea ice. However, a dense observational data set spans only a few decades. To better understand sea ice dynamics and especially the context of the recent decline, scientists need to construct longer records. This relies on proxy data from marine sediments, ice cores, and coastal material, each providing evidence of past sea ice presence or absence.
    Print ISSN: 0096-3941
    Electronic ISSN: 2324-9250
    Topics: Geosciences
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 2
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    Vertical distribution of dust and water ice aerosols from CRISM limb-geometry observations (2013)
    Wiley
    Details
    Publication Date: 2013-01-06
    Description: [1]  Near-infrared spectra taken in a limb-viewing geometry by the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) on-board the Mars Reconnaissance Orbiter (MRO) provide a useful tool for probing atmospheric structure. Specifically, the observed radiance as a function of wavelength and height above the limb enables the vertical distribution of both dust and water ice aerosols to be retrieved. More than a dozen sets of CRISM limb observations have been taken so far providing pole to pole cross-sections spanning more than a full Martian year. Radiative transfer modeling is used to model the observations taking into account multiple scattering from aerosols and the spherical geometry of the limb observations. Both dust and water ice vertical profiles often show significant vertical structure for nearly all seasons and latitudes that is not consistent with the well-mixed or Conrath- ν assumptions that have often been used in the past for describing aerosol vertical profiles for retrieval and modeling purposes. Significant variations are seen in the retrieved vertical profiles of dust and water ice aerosol as a function of season. Dust typically extends to higher altitudes (∼40–50 km) during the perihelion season than during the aphelion season (〈 20 km), and the Hellas region consistently shows more dust mixed to higher altitudes than other locations. Detached water ice clouds are common, and water ice aerosols are observed to cap the dust layer during all seasons.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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