The study presents long-term variability in satellite retrieved phytoplankton size
classes (PSC) at two coastal sites, off Gopalpur and Visakhapatnam, in the north-western Bay
of Bengal. The abundance-based models by Brewin et al. (2010) (B10) and Sahay et al. (2017)
(S17), for retrieval of PSC (micro, nano, and picophytoplankton), from satellite data, were
validated. Both the models performed well in the retrieval of nano and microphytoplankton.
However, B10 performed poorly in retrieving picophytoplankton. The statistical analysis indicated better performance of the S17 model and hence was applied to Moderate Resolution
Imaging Spectroradiometer onboard Aqua satellite (MODISA) data to understand the temporal
(at monthly climatology) and spatial variability (from nearshore to offshore). The spatial distribution indicated nearshore dominance of micro and offshore dominance of picophytoplankton.
In nearshore waters off Gopalpur, microphytoplankton dominated throughout the year except
for months of south-west monsoon (June and July) where the dominance of picophytoplankton
was observed. All PSC exhibited similar distribution at an annual scale with a primary peak
during pre-monsoon (March and April) and a secondary peak during post-monsoon (September—
November). However, microphytoplankton concentration during post-monsoon was higher off
Gopalpur in comparison to Visakhapatnam. The higher microphytoplankton concentration during pre-monsoon was attributed to recurrent phytoplankton blooms. Whereas, post-monsoon
increment could be attributed to enhanced phytoplankton growth by availing nutrients sourced
from monsoonal precipitation induced terrigenous influx. The outcome of the present study
recommends the use of the S17 model for satellite retrieval of PSC from the north-western Bay
of Bengal.
Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies
Informacja
SZANOWNI CZYTELNICY!
UPRZEJMIE INFORMUJEMY, ŻE BIBLIOTEKA FUNKCJONUJE W NASTĘPUJĄCYCH GODZINACH:
Wypożyczalnia i Czytelnia Główna: poniedziałek – piątek od 9.00 do 19.00