Long-term trends observed in the middle atmosphere temperatures using ground based LIDARs and satellite borne measurements

摘要: Long-term data available from Lidar systems located at three different locations namely Sao Jose dos Campos, Brazil (23.2° S, 45.8° W), Gadanki (13.5° N, 79.2° E) and Reunion (20.8° 55.5° have been used to investigate the long-term variations like Annual, Semi-annual, Quasi-biennial, El Nino Southern Oscillation solar cycle. These oscillations are also extracted simultaneous satellite borne measurements of HALogen Occultation Experiment (HALOE) instrument onboard UARS SABER TIMED over these stations making largest time series covering entire middle atmosphere. A good agreement is found between LIDAR satellite-derived amplitudes phases 30 65 km altitude, which suggests that can be trends globally. Latter extended 80 in order further oscillations. Large difference eastern pacific western noticed Changing cooling stratosphere warming mesosphere occurs more or less altitude around 70 this result agrees well with observed by reported literature. The peak trend does not occur a fixed however maximum 75 all stations. including various compared techniques.