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

Kishore, P and Venkat Ratnam, M and Velicogna, I and Sivakumar, V and Bencherif, H and Clemesha, BR and Simonich, DM and Batista, PP and Beig, G (2014) Long-term trends observed in the middle atmosphere temperatures using ground based LIDARs and satellite borne measurements. Annales Geophysicae, 32 (3). pp. 301-317.

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Abstract

Long-term data available from Lidar systems located at three different locations namely São José dos Campos, Brazil (23.2° S, 45.8° W), Gadanki (13.5° N, 79.2° E) and Reunion (20.8° S, 55.5° E) have been used to investigate the long-term variations like Annual, Semi-annual, Quasi-biennial, El Nino Southern Oscillation and solar cycle. These oscillations are also extracted from simultaneous satellite borne measurements of HALogen Occultation Experiment (HALOE) instrument onboard UARS and SABER onboard TIMED over these stations making largest time series covering the entire middle atmosphere. A good agreement is found between the LIDAR and satellite-derived amplitudes and phases between 30 and 65 km altitude, which suggests that satellite measurements can be used to investigate the long-term trends globally. Latter measurements are extended to 80 km in order to further investigate these oscillations. Large difference in the amplitudes between the eastern pacific and western pacific is noticed in these oscillations. Changing from cooling trends in the stratosphere to warming trends in the mesosphere occurs more or less at altitude around 70 km altitude and this result agrees well with that observed by satellite measurements reported in the literature. The peak in the cooling trend does not occur at a fixed altitude in the stratosphere however maximum warming trend is observed around 75 km at all the stations. The observed long-term trends including various oscillations are compared with that reported with various techniques. © Author(s) 2014. CC Attribution 3.0 License.

Item Type: Article
Additional Information: Copyright of this article belongs to Author(s) 2014. This work is distributed under the Creative Commons Attribution 3.0 License.
Uncontrolled Keywords: air temperature; atmospheric dynamics; El Nino-Southern Oscillation; lidar; mesosphere; meteorology; middle atmosphere; solar cycle; stratosphere; time series; trend analysis, Brazil; Gadanki; India; Mascarene Islands; Pacific Ocean; Pacific Ocean (East); Pacific Ocean (West); Reunion; Santa Catarina; Sao Jose; Tamil Nadu
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 05 Dec 2014 10:29
Last Modified: 05 Dec 2014 10:29
URI: http://moeseprints.incois.gov.in/id/eprint/904

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