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- Title
Phytoplankton Biomass Dynamics in the Strait of Malacca within the Period of the SeaWiFS Full Mission: Seasonal Cycles, Interannual Variations and Decadal-Scale Trends.
- Authors
Eko Siswanto; Katsuhisa Tanaka
- Abstract
Seasonal cycles, interannual variations and decadal trends of Sea-viewing Wide Field-of-view Sensor (Sea WiFS)-retrieved chlorophyll-a concentration (Chl-a) in the Strait of Malacca (SM) were investigated with reconstructed, cloud-free Sea WiFS Chl-a during the period of the Sea WiFS full mission (September 1997 to December 2010). Pixel-based non-parametric correlations of Sea WiFS Chl-a on environmental variables were used to identify the probable causes of the observed spatio-temporal variations of Sea WiFS Chl-a in northern, middle and southern regions of the SM. Chl-a was high (low) during the northeast (southwest) monsoon. The principal causes of the seasonality were wind-driven vertical mixing in the northern region and wind-driven coastal upwelling and possibly river discharges in the middle region. Among the three regions, the southern region showed the largest interannual variations of Chl-a. These variations were associated with the El Niño/Southern Oscillation (ENSO) and river runoff. Interannual variations of Chl-a in the middle and northern regions were more responsive to the Indian Ocean Dipole and ENSO, respectively, with atmospheric deposition being the most important driver. The most significant decadal-scale trend of increasing Chl-a was in the southern region; the trend was moderate in the middle region. This increasing trend was probably caused by environmental changes unrelated to the variables investigated in this study.
- Subjects
MALACCA (Malacca, Malaysia); PHYTOPLANKTON; BIOMASS; STATISTICAL correlation; STREAM measurements
- Publication
Remote Sensing, 2014, Vol 6, Issue 4, p2718
- ISSN
2072-4292
- Publication type
Article
- DOI
10.3390/rs6042718