Modeling Metallic Ion Transport During the Lifetime of an Intermediate Layer

Details Modeling Metallic Ion Transport During the Lifetime of an Intermediate Layer Modeling Metallic Ion Transport During the Lifetime of an Intermediate Layer

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sa52a05b&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SA52A-05

Physics

2419 Ion Chemistry And Composition (0335), 2439 Ionospheric Irregularities

Scientific paper

Intermediate layers are one of several phenomena that occur at midlatitudes in the nighttime E region. These ionization layers which typically form on the bottomside of the F region, are frequently observed by the Arecibo Incoherent Scatter Facility. Although their occurrence is relatively common, they exhibit diverse structure. Their altitude of formation, vertical thickness, and motion show significant nightly variations. Layer structure is influenced by a number of factors including composition, electric fields, and fluctuations in the neutral wind field. A numerical simulation has been employed to investigate the effects of composition on layer development. Specifically, the simulation, named LEAD (Layer Evolution And Dynamics), explores the transport of metallic ions during the formation and subsequent motion of a layer due to a time varying meridional wind field. We discuss the relative molecular/metallic ratio inside the layer during its evolution, the time scales for metallic ion dominance within the layer, and the motion of metallic ions in the adjacent altitude regions. We present animated results from LEAD which allow detailed inspection of ion composition variations throughout the process of layer evolution and descent.

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