Tuesday, 30 May 2017
SUBSURFACE ALGAL BLOOMS
Seasonal algal blooms developing in the Omani shelf waters during the South-West and North-East monsoonsresult in periodic fish kill incidents, shortages in desalination plant functioning, and recreational problems for tourists and divers.

Our team (sponsored by the ONRG grant linking scientists and technicians from the Department of Marine Science and Fisheries and University of East Anglia) has launched several sea gliders, in order to scan the shelf waters throughout the year. Sea gliders are autonomous robotic systems equipped with numerous sensors allowing recording of physical, chemical, and biological parameters of the water column. These records could be carried out every 6 hours, on the way to the surface (from the depth of several hundred meters) and back.In reaching the surface, the glider transmits recorded data via satellites and gets a new command- on what to do and where to sail.
 
Data on vertical distribution of temperature, salinity, water density, dissolved oxygen concentration, and phytoplankton biomass (based on fluorescence measurements), was complemented by sampling on board SQU research vessel “Al-Jamiah”coming from time to time to visit the glider.This sampling allowed us to understand what species have played the most important role in the formation of algal blooms and layers.

Overall, sea glider observations combined with plankton sampling and remote sensing provided insight into the termination of the winter monsoon algal blooms observed at sea surface and subsequent descending of these blooms to the depth of 25-55 m during the Spring Inter-monsoon season.
 

Second International   Indian Ocean Expedition 2016-2020

IMPLEMENTATION STRATEGY FOR THE SECOND INTERNATIONAL INDIAN OCEAN EXPEDITION 2015-20
icon IMPLEMENTATION STRATEGY (1.59 MB)

SECOND INTERNATIONAL INDIAN OCEAN EXPEDITION (IIOE-2)  Basin-Wide Research Program Science Plan (2015-2020)
icon INDIAN OCEAN EXPEDITION (IIOE-2) (6.18 MB)

 
Vertical profiles of summer temperatures

The decadal vertical profiles

The regional warming trend:  vertical profiles of summer temperatures (June-August) in the western Arabian Sea averaged over decades along Omani coast.

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Historical Data

In establishing the project time series, the monthly averaged and/or annually averaged historical data were employed.

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Research

The project sets up an innovative approach to understand long-term changes of the Sea of Oman ecosystem using the cascade of “zoomed in" regions- from the scale of the whole western Arabian Sea, through the scale of the Sea of Oman, to the scale of small regions (exemplified by the Bandar Khyran Bay).
The significance of the proposed research is an advanced understanding of interactions between physical-chemical dynamics and plankton communities on different spatial-temporal scales of variability.

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General contact:   Prof. Sergey Piontkovski spiontkovski@gmail.com
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