HR: 0800h
AN: SA51B-1134    [Abstracts]
TI: Non-linear Response of foF2 to solar activity and the Resulting Impacts on Derived Trends.
AU: Araujo-Pradere, E
EM: eduardo.araujo@noaa.gov
AF: CIRES, University of Colorado 325 Broadway, Boulder, CO 80305 United States
AU: * Weatherhead, E C
EM: betsy.weatherhead@noaa.gov
AF: CIRES, University of Colorado 325 Broadway, Boulder, CO 80305 United States
AU: Viereck, R A
EM: rodney.viereck@noaa.gov
AF: NOAA - SEC, 325 Broadway, Boulder, CO 80305 United States
AU: Akmaev, R
EM: rashid.akmaev@noaa.gov
AF: CIRES, University of Colorado 325 Broadway, Boulder, CO 80305 United States
AB: Trends in the foF2 layer may offer clear indications of climate change or give insight into the impact of the solar cycle on the lower atmosphere. For both inquiries, the influence of the solar cycle on the foF2 data needs to be characterized appropriately. Years with higher solar activity result in higher foF2. However, detailed investigation shows that the response of foF2 can be notably non-linear with both positive and negative second derivatives observed in data. These results are qualitatively independent of solar proxy used. The implications of these results are large for the trends derived using the data with possible false trends and false uncertainties on the trends if the non-linearity is not appropriately included in the trend detection techniques.
DE: 2400 IONOSPHERE (6929)
DE: 2443 Midlatitude ionosphere
DE: 2447 Modeling and forecasting
DE: 2499 General or miscellaneous
SC: SPA-Aeronomy [SA]
MN: Fall Meeting 2005