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Title: Fractal dimensions of convective clouds around Delhi
Authors: Ali, Kaushar
Chatterjee, R N
Prakash, Prem
Devara, P C S
Gupta, B R D
Issue Date: Feb-1998
Publisher: NISCAIR-CSIR, India
Abstract: Clouds exhibit fractal structure over wide ranges of scale. Following the method suggested by Love-joy [Science (USA), 216 (1982) 185], fractal analysis of convective clouds, observed within 100 km around Delhi during the monsoon season (July-September) of 1977, has been carried out. The study is based on the radar observations collected with a high power 3-cm weather radar. A total number of 2568 radar echoes of convective clouds having areas between 4 and 7420 km2 were analyzed for studying the relationship between their perimeters (P) and areas (A). The analysis showed that the relationship between the above two echo parameters can well be represented by a formula P~AD/2, where D is described as the fractal dimension of the cloud echo perimeter. However, it was found that the two fractal dimensions of the perimeters are required to describe the above perimeter-area relationship applicable for the entire range of cloud echo area. That is, D=1.34 for cloud echoes having areas up to 600 km2 and D=1.79 for echoes having areas greater than 600 km2.
Page(s): 1-6
ISSN: 0975-105X (Online); 0367-8393 (Print)
Appears in Collections:IJRSP Vol.27(1) [February 1998]

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