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Tsunami - A jolt for Phytoplankton variability in the seas around Andaman Islands: a case study using IRS P4-OCM data

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Title Tsunami - A jolt for Phytoplankton variability in the seas around Andaman Islands: a case study using IRS P4-OCM data
 
Creator Haldar, Dipanwita
Raman, Mini
Dwivedi, RM.
 
Subject Phytoplankton variability
Tsunami
Chlorophyll a concentration
Bay of Bengal
Andaman sea
Malacca Strait
 
Description 437-447
Present study
consists the effect of Tsunami on the phytoplankton variability in the Bay of Bengal, Seas around
Andaman and Malacca
Strait was studied using
IRS P4- Ocean Colour Monitor (OCM) data. Distribution was compared with
previous year. Changing circulation in the Bay of Bengal
has a strong influence on the spatial and temporal variability of the
biological production, expressed in terms of chlorophyll-a concentration, an index of phytoplankton biomass. Satellite
measurement of ocean colour, which gives large spatial coverage and high
temporal resolution, provides unique opportunity for the study. OCM data for
December 1999, 2000, 2003, 2004 and January 2000 & 2005 were analyzed which
indicated increase in chlorophyll concentration throughout, especially Malacca Strait
region (near Sumatra) to as high as 20-25
times compared to pre Tsunami period. At other places too the concentration was
at least raised three to five times compared to pre Tsunami period.
Climatological analysis was done with previous normal years’ data, and showed
that the increasing trend in the chlorophyll-a concentration was significant in
the post tsunami period till first week of January 2005. Also it was observed
that the across longitude variation was more remarkable than the latitudinal
variation. Rapid increase in chlorophyll-a concentration in shelf and slope
regions of Bay of Bengal and Andaman
Sea in the post tsunami
period may be attributed to the breakdown of density stratification and
upwelling of nutrients due to tsunami-induced internal waves.


 
Date 2013-09-02T12:13:22Z
2013-09-02T12:13:22Z
2013-08
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/20900
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.42(4) [August 2013]