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Satellite altimetric sea surface height (SSH) measurements from 1992 through 2010 are used to explore the oceanic semiannual variations in the Philippine Sea (PS). Pronounced semiannual SSH variations are detected within two zonal bands. One lies east of Luzon Strait (19°–22°N) in the northern PS, while the other is southeast of Mindanao coast (4°–7°N) in the southern PS. In the two near-coast boxes...
The secular trend and seasonal variations of electron densities at 400 km altitude from 2001 to 2009 are analyzed globally using data observed by the planar Langmuir probe onboard CHAMP. The secular trend of electron densities positively correlates with that of solar radiation. At middle and high geomagnetic latitudes, the annual variations are significant and the maximum of electron densities occurs...
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