Investigation of anomalous transport in the lower thermosphere Project

<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>

Data and Resources

Additional Info

Field Value
Maintainer Miguel Larsen
Last Updated March 31, 2025, 13:05 (UTC)
Created March 31, 2025, 13:05 (UTC)
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://data.nasa.gov/data.json
catalog_conformsTo 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 6546bc86-927a-4748-90cf-698a72b7c852
harvest_source_id 61638e72-b36c-4866-9d28-551a3062f158
harvest_source_title DNG Legacy Data
identifier TECHPORT_10766
issued 2010-12-01
landingPage http://techport.nasa.gov/view/10766
modified 2020-01-29
programCode {026:000}
publisher Science Mission Directorate
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}
resource-type Dataset
source_datajson_identifier true
source_hash f19afac5a04085ae8402b2706d798b0263e0ac41216a6cf1b4f7d18b0cf8961f
source_schema_version 1.1
temporal 2010-12-01T00:00:00Z/2013-12-01T00:00:00Z