Accession Number : ADA134485

Title :   Lightning as a Source of NO sub x in the Troposphere.

Descriptive Note : Final rept.,

Corporate Author : INSTITUTE FOR DEFENSE ANALYSES ALEXANDRIA VA

Personal Author(s) : Kowalczyk,Marta ; Bauer,Ernest

PDF Url : ADA134485

Report Date : Dec 1981

Pagination or Media Count : 86

Abstract : The contribution of lightning to the global tropospheric NO sub x budget is estimated. The injection height of the NO sub x as well as its latitudinal distribution is provided for use in 2-D atmospheric models. Several components of the NO sub x production estimate are reviewed in detail. Numerical modeling calculations, experimental simulations, as well as in-situ measurments are examined to determine the efficiency of NO sub x production by lightning. Global lightning distributions from satellites are used to derive a mathematical expression for the seasonal and latitudinal lightning rate. Specific attention is given to the latitudinal behavior of the height of NO sub x injection and the partitioning of the lightning rate between cloud-to-ground flashes and intracloud discharges. Various mechanisms for the loss of NO sub x through rainout during the accompanying thunderstorm are examined and are found to be ineffective. The annual, global NO sub x production rate derived here is 5.7 x 10 to the 12th power gN/yr for all forms of lightining.

Descriptors :   *Troposphere, *Lightning, *Nitrogen oxides, Atmosphere models, Production rate, Global, Quantity, Simulation, Mathematical models

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE