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Lightning Nitrogen Oxides Model (LNOM) Datasets Table of Contents
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. More detailed information about the LNOM can be found at LNOM_readme.pdf. NALMA data: http://branch.nsstc.nasa.gov/PUBLIC/NALMA/ The Lightning Nitrogen Oxides Model (LNOM) is NASA software which combines detailed, flash-specific measurements of lightning with empirical laboratory results and theoretical results in order to make estimates of the amount of nitrogen oxides (NOx = NO + NO2) produced by both ground and cloud flashes. The vertical lightning NOx profile inside the LNOM analysis cylinder is obtained for the analysis period (typically 1 month), and the total NOx produced by each flash is also obtained. Flashes (or portions of a flash) falling outside the LNOM analysis cylinder do not contribute to the vertical NOx profile within the LNOM analysis cylinder. All NOx amounts are provided in moles. Additional information on LNOM is available in LNOM_overview.doc. File Naming ConventionThe data and browse files are of the form: data:
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where: Data Format Detailed information on the data format is available in the PI document LNOM_readme.pdf. CitationOur data sets are provided through the NASA Earth Science Data and Information System (ESDIS) Project and the Global Hydrology Resource Center (GHRC) Distributed Active Archive Center (DAAC). GHRC DAAC is one of NASA's Earth Observing System Data and Information System (EOSDIS) data centers that are part of the ESDIS project. ESDIS data are not copyrighted; however, in the event that you publish our data or results derived by using our data, we request that you include an acknowledgment within the text of the article and a citation on your reference list. Examples for general acknowledgments, data set citation in a reference listing, and crediting online web images and information can be found at: http://ghrc.nsstc.nasa.gov/uso/citation.html Cooray, V., M. Rahman, V. Rakov, On the NOx production by laboratory electrical discharges and lightning, J. of Atmo. Solar-Terres. Phys., 71, 1877-1889, 2009. Cummins, K. L., M. J. Murphy, An overview of lightning locating systems: history, techniques, and data uses, with an in-depth look at the U.S. NLDN, IEEE Transactions on Electromagnetic Compatibility, 51, No. 3, 499-518, 2009. Koshak, W., and H. Peterson, A summary of the NASA Lightning Nitrogen Oxides Model (LNOM) and recent results, 10th Annual Community Modeling and Analysis System (CMAS) Conference, Chapel Hill, NC, October 24-26, 2011. Koshak, W., H. Peterson, M. Khan, A. Biazar, L. Wang, The NASA Lightning Nitrogen Oxides Model (LNOM): Application to Air Quality Modeling, XIV International Conference on Atmospheric Electricity (ICAE), Rio de Janeiro, Brazil, August 8-12, 2011. Koshak, W. J., H. S. Peterson, E. W. McCaul, A. Biazar, Estimates of the lightning NOx profile in the vicinity of the North Alabama Lightning Mapping Array, International Lightning Detection Conference (ILDC), Orlando, FL, April 19-20, 2010. Koshak, W. J., M. N. Khan, A. P. Biazar, M. Newchurch, R. T. McNider, A NASA model for improving the lightning NOx emission inventory for CMAQ, Joint Session: 4th Conference on the Meteorological Applications of Lightning Data and and the 11th Conference on Atmospheric Chemistry; 89th Annual American Meteorological Society (AMS) Conference, Phoenix, AZ, January 11-15, 2009. Koshak, W. J., R. J. Solakiewicz, R. J. Blakeslee, S. J. Goodman, , H. J. Christian, J. M. Hall, J. C. Bailey, E. P. Krider, M. G. Bateman, D. J. Boccippio, D. M. Mach, E. W. McCaul, M. F. Stewart, D. E. Buechler, W. A. Petersen, D. J. Cecil, North Alabama Lightning Mapping Array (LMA): VHF source retrieval algorithm and error analyses, J. Atmos. Oceanic Technol., 21, 543-558, 2004. Wang, Y., A. W. DeSilva, and G. C. Goldenbaum, 1998: Nitric oxide production by simulated lightning: dependence on current, energy, and pressure, J. Geophys. Res., 103, 19149-19159. Contact InformationThe data provider is:
To order these data or for further information, please contact:
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