Table 1 List of authors who derived long-term trends in foF2 and their findings
From: A long-term trend in the F2-layer critical frequency as observed at Alma-Ata ionosonde station
Authors | Site: name or number ( N) of stations | Years of observation | Trends (MHz y-1) |
|---|---|---|---|
Danilov (2002) | Sverdlovsk [56.43°N, 58.57°E] | 1948-1994 | -0.015 |
Danilov (2003) | N = 21, φ > 30° | 1958-mid-nineties | -0.012 |
Danilov (2013) | N = 12 | 1990-2010 | -0.024 (1400 local time), -0.054 (after sunset) |
Mielich and Bremer (2013) | N = 124 | 1948-2009 | -0.003 to 0.0038 |
Yue et al. (2006) | N = 19, [42.9°S to 62.0°N, ca. 130°E] | 1948-2005 | -0.005 |
Juliusruh [54.6°N, 13.4°E] | 1976-1996 | -0.01 to -0.02 | |
Ghabahou et al. (2013) | Ouagadougou [12.4°N, 358.5°E] | 1966-1998 | -0.015 |
Khaitov et al. (2012) | Tomsk [56.5°N, 84.9°E] | 1937-2011 | -0.008 to -0.014 |
Mikhailov (2006) | Slough [51.48°N, -0.57°E] | 1935-2000 | -0.00086 |