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About Cyclone eAtlas – IMD
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Tracks of Cyclones and Depressions over North Indian Ocean
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(from 1891 onwards)
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Cyclone eAtlas – IMD
is an electronic atlas on Tracks of Cyclones and Depressions (C and Ds) over the
North Indian Ocean during the period from 1891 to the latest year.
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The Help
menu links to the Cyclone eAtlas – IMD: User’s Guide which
details the various output products that can be generated using this
software.
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Technical Note (Cyclone eAtlas – IMD)
gives the technical details of various input parameters and methodologies adopted
for computations.
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Broadly, two types of outputs can be generated from this Atlas
namely Display of tracks of C&Ds
and Statistical information on formation,
dissipation, movement, speed, direction of movement, recurvature, coastal crossing
and intensification of C and Ds.
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Display of tracks of C&Ds
is based on two types of inputs as indicated below:
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(i) View by general selection: The tracks of C&Ds satisfying the following
input options given by the user are displayed: Year(s), Month(s), Basin(s) / Area
of Formation, Intensity (level), Intensity (Type), Basin(s) / Area of Dissipation,
type and belt of coastal crossing.
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(ii) View by specific selection:
The track of a single CD is displayed based on the identifier selected by the user
using the search options on Year, Month, Basin and Intensity.
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Statistical information
can be generated either in Map form or
in Tabular/Graphical form.
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(i) Map form statistics
Statistics on Frequency of C and Ds
, Frequency of Formation and Dissipation of C and Ds,
Percentage frequency of Direction of movement of C and Ds, Mean Direction,
Scalar and Vector Speed of movement of C and Ds, Frequency of recurvature of
C and Ds, Frequency of coastal crossing of C and Ds between two coastal stations
can be generated in Map
Form for every 2.5 longitudinal * 2.5 latitudinal
grid.
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(ii) Tabular / Graphical outputs
Annual monthly / seasonal frequency, Percentage
frequency and Probability of intensification can be generated in
Table form or as
Bar Diagram for various Basins of formation and Intensity options.
A Consolidated list of C and Ds
can also be generated in a Tabular form.
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Altogether Eleven Functionalities
or Main Menus are provided to generate
the above outputs.
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