Send to:

Choose Destination
See comment in PubMed Commons below
Philos Trans A Math Phys Eng Sci. 2010 Jul 13;368(1922):3145-52. doi: 10.1098/rsta.2010.0103.

Micro-Raman spectroscopic study of extremely large atmospheric ice conglomerations (megacryometeors).

Author information

  • 1Cristalografía y Mineralogía, Unidad Asociada CSIC al Centro de Astrobiología, Universidad de Valladolid, Valladolid 47006, Spain.


For the first time, micro-Raman spectroscopy has been applied to the structural study of four megacryometeors (extremely large atmospheric ice conglomerations that fall in general under blue-sky atmospheric conditions) that fell in Spain. The Raman spectra taken on the megacryometeor cores have been compared with those obtained from an in situ and online study performed on the crystallization process of water in the laboratory. A detailed comparison of the band profiles obtained made it possible to place the formation of the megacryometeors within a particular range of temperatures (-10 to -20 degrees C), which in turn can be related with the altitude of formation in the atmosphere. These results have also been compared with isotope concentrations (delta(18)O and deltaD) previously obtained in these cores. The two sets of results show a close correlation.

[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Loading ...
    Write to the Help Desk