TY - JOUR A1 - Scott, C. J. A1 - Stamper, R. A1 - Rishbeth, H. T1 - Long-term changes in thermospheric composition inferred from a spectral analysis of ionospheric F-region data JO - Ann. Geophys. J1 - ANGEO VL - 32 IS - 2 SP - 113 EP - 119 Y1 - 2014/02/17 PB - Copernicus Publications SN - 1432-0576 UR - https://angeo.copernicus.org/articles/32/113/2014/ L1 - https://angeo.copernicus.org/articles/32/113/2014/angeo-32-113-2014.pdf DO - 10.5194/angeo-32-113-2014 ER -