[Personnel: Last_Name='GHRC USER SERVICES OFFICE']
NASA MSFC Lightning Nitrogen Oxides Model (LNOM) Data for North Alabama RegionEntry ID: lnomnalma
Abstract: The LNOM datasets are restricted to those who appear on the LNOM Users List (LUL). Only those investigators that have a working relationship with the NASA Marshall Space Flight Center (MSFC) Lightning Group on topics directly pertaining to global chemistry/climate analyses, regional air quality, or other areas directly related to lightning chemistry are allowed access to the LNOM data. ... Redistribution of LNOM data is prohibited.
The NASA Marshall Space Flight Center Lightning Nitrogen Oxides Model (LNOM) combines detailed, flash-specific measurements of lightning with both theoretical and empirical laboratory results to obtain estimates of lightning NOx production. Each LNOM dataset is based on measurements from a specific regional VHF Lightning Mapping Array (LMA), and on ground flash location, peak current, and stroke multiplicity data from the National Lightning Detection Network™ (NLDN). Both the LMA and NLDN data are used to determine the flash type (ground or cloud) of each flash occurring within an analysis cylinder. The LNOM analyzes the LMA sources to estimate the total channel length of each flash. It also produces the Segment Altitude Distribution (SAD) product by dicing up the lightning channel into 10-m segments, and then tallies those segments as a function of altitude. From all of the 10-m segments, the LNOM computes the vertical lightning NOx profile inside the analysis cylinder and the total NOx produced by each flash. A summation of the NOx profiles contributed to the analysis cylinder by each flash gives the final lightning NOx profile product for the analysis period studied (typically a 1 month profile). The LNOM NOx profiles include NOx from several non-return stroke lightning NOx production mechanisms. Users of LNOM data typically include regional air quality and global chemistry/climate modelers who need to better-parameterize lightning NOx sources. Rather than assigning an unrealistic fixed amount of NOx to ground and cloud flashes, the modeler can employ LNOM data to assign realistic (and statistical) NOx profiles to each flash.
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Start Date: 2004-01-01Stop Date: 2010-12-31
ISO Topic Category
Access Constraints The LNOM datasets are restricted to those who appear on the LNOM Users List (LUL). Only those investigators that have a working relationship with the NASA Marshall Space Flight Center (MSFC) Lightning Group on topics directly pertaining to global chemistry/climate analyses, regional air quality, or other areas directly related to lightning chemistry are allowed access to the LNOM data. Redistribution of LNOM data is prohibited.
Distribution Media: FTP
Distribution Size: 291 Kb
Distribution Format: ascii, png
Email: william.koshak at nasa.gov
NASA Marshall Space Flight Center Earth Science Office, ZP11 Robert E. Cramer Research Hall 320 Sparkman Drive
Province or State: AL
Postal Code: 35805-1912
Role: DIF AUTHOR
Email: ghrcdaac at itsc.uah.edu
320 Sparkman Dr.
Province or State: AL
Postal Code: 35805
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2012-01-12
Last DIF Revision Date: 2012-02-09