HR: 11:00h
AN: SA52A-03    [Abstracts]
TI: Ionospheric climatology and model from long-term databases of worldwide incoherent scatter radars
AU: Zhang, S
EM: shunrong@haystack.mit.edu
AF: MIT Haystack Observatory, Off Route 40, Westford, MA 01886 United States
AU: * Holt, J M
EM: jmh@haystack.mit.edu
AF: MIT Haystack Observatory, Off Route 40, Westford, MA 01886 United States
AU: van eyken, T
EM: Tony.van.Eyken@eiscat.com
AF: EISCAT Association, P.O. Box 164, SE-981 23, KIRUNA, Sweden
AU: McCready, M
EM: mary.mccready@sri.com
AF: SRI International, 333 Ravenswood Ave, Menlo Park, CA 94025 United States
AU: Amory-Mazaudier, C
EM: christine.mazaudier@cetp.ipsl.fr
AF: Centre for the Study of Earth and Planets Environments, CNRS, 94107 Saint-Maur-des-Fosses Cedex,, France
AU: Fukao, S
EM: fukao@kurasc.kyoto-u.ac.jp
AF: Research Institute for Sustainable Humanosphere, Kyoto University, Gokanosho, Uji, Japan
AU: Sulzer, M
EM: msulzer@naic.edu
AF: Arecibo Observatory, National Astronomy & Ionosphere Center, HC03 Box 53995, Arecibo, 00612 Puerto Rico
AB: Long-term databases of worldwide incoherent scatter radars are utilized to study ionospheric climatology and create empirical models for electron density, ion and electron temperatures, and ion drifts. These radars, including, from magnetic north to south and east to west, EISCAT Svalbard Radar (Norway), Soundrestrom Radar (Greenland), EISCAT Tromso Radars (Norway), Millstone Hill Radar (USA), St. Santin Radar (France), Shigaraki Middle and Upper atmosphere (MU) Radar (Japan) and Arecibo Radar (Puerto Rico), are able to characterize diurnal, seasonal, and solar cycle variations of height dependent ionospheric strctures in a broad latitude and longitude area. In these huge databases, available through the MADRIGAL system (http://www.openmadrigal.org), the data cover generally 1-2 solar cycles, and for Millstone Hill and Arecibo they span nearly 3 solar cycles. Based on these data, our systematical analyses result in a comprehensive overview of various features of the ionosphere and series of web-based empirical models (http://www.haystack.mit.edu/madrigal/Models/). This presentation will review local models for each site and discuss the ionospheric climatology, with emphasis on the development of annual/semiannual electron density variations with latitudes and longitudes, and on ionospheric thermal status at midlatitudes. This presentation will also explore the long-term trend of ionospheric electron density and ion temperature variations from Millstone Hill observations.
UR: http://www.haystack.mit.edu/madrigal/Models/
DE: 0355 Thermosphere--composition and chemistry
DE: 2443 Midlatitude ionosphere
DE: 2447 Modeling and forecasting
DE: 2467 Plasma temperature and density
DE: 6949 Radar astronomy
SC: SPA-Aeronomy [SA]
MN: 2005 Joint Assembly