Decadal changes of the Western Arabian sea ecosystem

Sergey A. Piontkovski*, Bastien Y. Queste

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

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-a concentrations, vertical macrofaunal habitat compression, declining sardine landings and an increase of fish kill incidents along the Omani coast.

Original languageEnglish
Pages (from-to)49-64
Number of pages16
JournalInternational Aquatic Research
Volume8
Issue number1
DOIs
Publication statusPublished - Mar 1 2016

Keywords

  • Arabian Sea
  • Chlorophyll-a
  • Fish landings
  • Sea surface temperature

ASJC Scopus subject areas

  • Aquatic Science

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