Research Papers

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 Affiliations
Vasudevannair Krishnakumar

University of Kerala, Department of Optoelectronics, Kariavattom, Trivandrum 695581, Kerala, India

Mohandas College of Engineering and Technology, Anad, Thiruvananthapuram 695544, India

Malladi Satyanarayana

University of Kerala, Department of Optoelectronics, Kariavattom, Trivandrum 695581, Kerala, India

Soman R. Radhakrishnan

CSIR-National Physical Laboratory, Radio and Atmospheric Sciences Division, Dr. K. S. Krishnan Road, New Delhi 110012, India

Reji K. Dhaman

University of Kerala, Department of Optoelectronics, Kariavattom, Trivandrum 695581, Kerala, India

Glory Selvan Jayeshlal

University of Kerala, Department of Optoelectronics, Kariavattom, Trivandrum 695581, Kerala, India

Gopinathan Nair S. Motty

University of Kerala, Department of Optoelectronics, Kariavattom, Trivandrum 695581, Kerala, India

Vellara P. Mahadevan Pillai

University of Kerala, Department of Optoelectronics, Kariavattom, Trivandrum 695581, Kerala, India

Karnam Raghunath

National Atmospheric Research Laboratory, Gadanki, Tirupati 517502, India

Madineni Venkat Ratnam

National Atmospheric Research Laboratory, Gadanki, Tirupati 517502, India

Duggirala Ramakrishna Rao

Geetanjali College of Engineering and Technology, Cheeryal, Keesara, Hyderabad 501301, Andhra Pradesh, India

Pindlodi Sudhakar

Geetanjali College of Engineering and Technology, Cheeryal, Keesara, Hyderabad 501301, Andhra Pradesh, India

J. Appl. Remote Sens. 8(1), 083659 (Mar 26, 2014). doi:10.1117/1.JRS.8.083659
History: Received October 18, 2013; Revised January 23, 2014; Accepted February 18, 2014
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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.

© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Vasudevannair Krishnakumar ; Malladi Satyanarayana ; Soman R. Radhakrishnan ; Reji K. Dhaman ; Glory Selvan Jayeshlal, et al.
"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)", J. Appl. Remote Sens. 8(1), 083659 (Mar 26, 2014). ; http://dx.doi.org/10.1117/1.JRS.8.083659


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