Mathematics – Logic
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa21a1524a&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SA21A-1524
Mathematics
Logic
0545 Modeling (4255), 2415 Equatorial Ionosphere, 2437 Ionospheric Dynamics, 2447 Modeling And Forecasting, 7924 Forecasting (2722)
Scientific paper
The day-time eastward equatorial electric field (EEF) in the E-region plays an important role in equatorial ionospheric dynamics. It is responsible for driving the equatorial electrojet (EEJ) current system, equatorial vertical ion drifts, and the equatorial ionization anomaly (EIA). Due to its importance, there is much interest in accurately measuring and modeling the EEF. However, there is a severe lack of high quality data with the notable exception being the JULIA coherent scatter radar in Peru. In this work we use CHAMP satellite-derived latitudinal current profiles of the day-time EEJ in order to estimate the eastward electric field at all longitudes, seasons, and day-side local times. We have constructed a dataset of over 36,000 individual EEF estimates based on six years of CHAMP data. This data was used to construct a climatological model of the EEF mean as a function of longitude, season, local-time and solar flux level. Furthermore, we have created a model of the day-to-day variability of the EEF as a function of the same parameters.
Alken Patrick
Maus Stefan
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