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Journal of Applied Remote Sensing

Lidar investigations on the optical and dynamical properties of cirrus clouds in the upper troposphere and lower stratosphere regions at a tropical station, Gadanki, India (13.5°N, 79.2°E)
Author(s): Vasudevannair Krishnakumar; Malladi V. Satyanarayana; Soman R. Radhakrishnan; Reji K. Dhaman; Glory S. Jayeshlal; Gopinathan Nair S. Motty; Vellara P. Mahadevan Pillai; Karnam Raghunath; Madineni V. Ratnam; Duggirala R. Rao; Pindlodi Sudhakar
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Paper Abstract

High altitude cirrus clouds are composed mainly of ice crystals with a variety of sizes and shapes. They have a large influence on Earth’s energy balance and global climate. Recent studies indicate that the formation, dissipation, life time, optical, and micro-physical properties are influenced by the dynamical conditions of the surrounding atmosphere like background aerosol, turbulence, etc. In this work, an attempt has been made to quantify some of these characteristics by using lidar and mesosphere–stratosphere–troposphere (MST) radar. Mie lidar and 53 MHz MST radar measurements made over 41 nights during the period 2009 to 2010 from the tropical station, Gadanki, India (13.5°N, 79.2°E). The optical and microphysical properties along with the structure and dynamics of the cirrus are presented as observed under different atmospheric conditions. The study reveals the manifestation of different forms of cirrus with a preferred altitude of formation in the 13 to 14 km altitude. There are considerable differences in the properties obtained among 2009 and 2010 showing significant anomalous behavior in 2010. The clouds observed during 2010 show relatively high asymmetry and large multiple scattering effects. The anomalies found during 2010 may be attributed to the turbulence noticed in the surrounding atmosphere. The results show a clear correlation between the crystal morphology in the clouds and the dynamical conditions of the prevailing atmosphere during the observational period.

Paper Details

Date Published: 26 March 2014
PDF: 22 pages
J. Appl. Rem. Sens. 8(1) 083659 doi: 10.1117/1.JRS.8.083659
Published in: Journal of Applied Remote Sensing Volume 8, Issue 1
Show Author Affiliations
Vasudevannair Krishnakumar, Univ. of Kerala (India)
Malladi V. Satyanarayana, Univ. of Kerala (India)
Soman R. Radhakrishnan, Univ. of Kerala (India)
Reji K. Dhaman, Univ. of Kerala (India)
Glory S. Jayeshlal, Univ. of Kerala (India)
Gopinathan Nair S. Motty, Univ. of Kerala (India)
Vellara P. Mahadevan Pillai, Univ. of Kerala (India)
Karnam Raghunath, National Atmospheric Research Lab. (India)
Madineni V. Ratnam, National Atmospheric Research Lab. (India)
Duggirala R. Rao, Geethanjali College of Engineering and Technology (India)
Pindlodi Sudhakar, Geethanjali College of Engineering and Technology (India)

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