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Please use this identifier to cite or link to this item: http://dyuthi.cusat.ac.in/purl/3779

Title: Variation in radio refractivity index associated with formation of low - pressure systems
Authors: Dr.Babu, C A
Asha, Philip S
Hareeshkumar, P V
Keywords: Radio refractivity
Anomalous propagation
Super refraction
Low pressure Systems
Issue Date: Jan-2007
Publisher: www.elsevier.com/
Abstract: Numerous low - pressure systems form in the Arabian Sea and Bay of Bengal. These low-pressure systems are highly useful in bringing the rainfall over the Indian sub continent. The developments of these systems are accompanied by the reduction in air temperature and an increase in atmospheric humidity. The radio refractivity, which is a function of the atmospheric pressure, temperature and humidity, also changes following the development of these systems. Variation of radio refractive index and its vertical gradient are analysed for many low pressure systems formed over the Arabian Sea and Bay of Bengal. It is found that the atmosphere becomes super refractive associated with the formation of these systems, caused by the increase in humidity and decrease in temperature. The maximum gradient is observed near the surface layers, especially in the lowest 1 km. Super refraction leads to increased radar detection range and extension of radio horizon
URI: http://dyuthi.cusat.ac.in/purl/3779
ISSN: 0278-4343
Appears in Collections:Dr.C A Babu

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