Statistics – Computation
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsa41a..06b&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SA41A-06
Statistics
Computation
7843 Numerical Simulation Studies, 2439 Ionospheric Irregularities, 2443 Midlatitude Ionosphere
Scientific paper
Nighttime E-region intermediate layers form though a complex set of electrodynamic processes that are dominated by the coupling of the horizontal neutral winds and the geomagnetic field. Variations in layer structure and development, however, may be due to several factors such as composition, electric fields, and vertical winds. In 1968 a sequence of four rockets were launched from Wallops Island, Virginia, at 90 minute intervals [Smith, 1970] and showed the presence of a descending intermediate layer throughout the observing period. Since coincident chemical release neutral wind measurements were also made during the experiment, the data set represents a unique set of observations of a midlatitude intermediate layer. Fujitaka et al. [1971] have previously analyzed the same data using a numerical computation, but significant improvements are now possible by using a recently developed numerical simulation. Using the observed neutral winds and better estimates of the production rates, reaction rates, and the applied initial conditions than those available when the earlier study was carried out, we find improved agreement with the observed density profiles. In addition, we also show the results from several case studies to illustrate the effects of varying composition and vertical winds on the intermediate layer formation and development. Fujitaka, K., T. Ogawa, T. Tohmatsu, J. Atmos. Terr. Phys., 33, 687-700, 1971. Smith, L. G., J. Atmos. Terr. Phys., 32, 1247-1457, 1970.
Bishop Richard L.
Earle Gregory D.
Larsen Mark F.
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