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    • Investigation of anomalous transport in the lower thermosphere Project

    Metadata Updated: April 10, 2025

    <p align="LEFT"> &nbsp;</p> <p> <font size="3">Near-simultaneously deployed chemical tracer trails over an extended horizontal range will be used to obtain measurements of the turbulent structure function and (the pair) relative velocity distribution over a range of spatial scales covering a full decade. </font></p> <p> <font size="3">Trimethyl aluminum trails (TMA) released in the mesosphere and lower thermosphere have been used to trace the neutral motions over 500 times since 1958. Such releases are a simple and reliable method for obtaining horizontal velocities with good accuracy and height resolution. Deriving the diffusion characteristics is more difficult but two detailed studies of the expansion rates have been carried out. Analyses from the earlier experiments show enhanced or anomalous diffusion rates in a 10 to 15 km altitude range above the turbopause. (MAJOR)</font></p> <p> <font size="3">Even if only partially successful, this study is expected to contribute significantly to our understanding of turbulent motions in the atmosphere as turbulence at small scales is currently poorly understood. (MINOR)</font></p> <p> &nbsp;</p>

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    References

    http://techport.nasa.gov/home
    http://techport.nasa.gov/doc/home/TechPort_Advanced_Search.pdf
    http://techport.nasa.gov/fetchFile?objectId=6561
    http://techport.nasa.gov/fetchFile?objectId=3456
    http://techport.nasa.gov/fetchFile?objectId=3447
    http://techport.nasa.gov/fetchFile?objectId=6584
    http://techport.nasa.gov/fetchFile?objectId=6560
    http://techport.nasa.gov/fetchFile?objectId=3448

    Dates

    Metadata Created Date November 12, 2020
    Metadata Updated Date April 10, 2025

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 12, 2020
    Metadata Updated Date April 10, 2025
    Publisher Science Mission Directorate
    Maintainer
    Identifier TECHPORT_10766
    Data First Published 2010-12-01
    Data Last Modified 2025-03-31
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id bf66c2cb-4792-4ecd-920b-41c00d74db69
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL http://techport.nasa.gov/view/10766
    Program Code 026:000
    Related Documents http://techport.nasa.gov/home, http://techport.nasa.gov/doc/home/TechPort_Advanced_Search.pdf, http://techport.nasa.gov/fetchFile?objectId=6561, http://techport.nasa.gov/fetchFile?objectId=3456, http://techport.nasa.gov/fetchFile?objectId=3447, http://techport.nasa.gov/fetchFile?objectId=6584, http://techport.nasa.gov/fetchFile?objectId=6560, http://techport.nasa.gov/fetchFile?objectId=3448
    Source Datajson Identifier True
    Source Hash 05313233716ed0e8f22c460e097592d4e7af32a695fd051501d848d171d40fbc
    Source Schema Version 1.1
    Temporal 2010-12-01T00:00:00Z/2013-12-01T00:00:00Z

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