Accession Number : ADA267583


Title :   Atmospheric Ionization by Solar Particles Detected by Nitrate Measurement in Antarctic Snow


Descriptive Note : Annual technical rept. 1 Jun 92-31 May 93,


Corporate Author : KANSAS UNIV CENTER FOR RESEARCH INC LAWRENCE


Personal Author(s) : Dreschhoff, G ; Armstrong, T P ; Cravens, T ; Vitt, F


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a267583.pdf


Report Date : 30 Jun 1993


Pagination or Media Count : 44


Abstract : Nitrates are observed in polar snow, firn and ice in variable amounts and concentrations. Hundred-year or longer time series of nitrate observations can be obtained from ice cores. It is important to identify possible and probable sources of nitrates and mechanisms by which surface deposition and incorporation into ice occurs. Several important sources of nitrate are solar protons and auroral electrons producing ionization in the D-region. Chemical reactions energized by this ionization produce nitrates. Transport mechanisms can move nitrates from the stratosphere into the troposphere where it becomes incorporated into precipitation, From the amounts of nitrates deposited in polar snow over long times it may be possible to determine atmospheric characteristics of importance to climate and global change studies. The specific goal of this study is to evaluate carefully and completely the atmospheric nitrates produced by solar flare protons and auroral electrons and to estimate the amounts deposited in snow.


Descriptors :   *PARTICLES , *SNOW , *ICE , *NITRATES , *ANTARCTIC REGIONS , *IONIZATION , *ATMOSPHERICS , *SOLAR STRUCTURE , POLAR REGIONS , MEASUREMENT , DETECTION , CORES , CHEMICALS , TRANSPORT , D REGION , STRATOSPHERE , SOLAR FLARES , GEOCHEMISTRY , TROPOSPHERE , AURORAE , CLIMATE , PROTONS , ESTIMATES , VARIABLES , SURFACES , DEPOSITION , ELECTRONS , PRECIPITATION


Subject Categories : Meteorology
      Inorganic Chemistry
      Geology, Geochemistry and Mineralogy
      Snow, Ice and Permafrost


Distribution Statement : APPROVED FOR PUBLIC RELEASE