Details for Decadal changes of the Western Arabian sea ecosystem

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Name:Decadal changes of the Western Arabian sea ecosystem
Description:
Decadal changes of the Western Arabian sea ecosystem
Sergey A. Piontkovski1, Bastien Y. Queste2
1College of Agricultural and Marine Sciences, Sultan Qaboos University, Al-Khod 123, P.O. Box 34, Muscat, Sultanate of Oman
2Centre for Ocean and Atmospheric Sciences, University of East Anglia, Norwich, Norfolk NR4 7TJ, UK

Abstract
Historical data from oceanographic expeditions and remotely sensed data on outgoing longwave radiation, temperature, wind speed and ocean color in the western Arabian Sea (1950-2010) were used to investigate decadal trends in the physical and biochemical properties of the upper 300 m. 72 % of the 29,043 vertical profiles retrieved originated from USA and UK expeditions. Increasing outgoing longwave radiation, surface air temperatures and sea surface temperature were identified on decadal timescales. These were well correlated with decreasing wind speeds associated with a reduced Siberian High atmospheric anomaly. Shoaling of the oxycline and nitracline was observed as well as acidification of the upper 300 m. These physical and chemical changes were accompanied by declining chlorophyll-я concentrations, vertical macrofaunal habitat compression, declining sardine landings and an increase of fish kill incidents along the Omani coast.

Keywords
Arabian Sea,Fish landings,Chlorophyll-a,Sea surface temperature
Filename:Decadal trends.pdf
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Created On: 03/14/2016 15:50
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Last updated on: 03/14/2016 15:53
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