ESA-MERIS 10-Year Mission Reveals Contrasting Phytoplankton Bloom Dynamics in Two Tropical Regions of Northern Australia

摘要: The spatial and temporal variability of phytoplankton blooms was investigated in two tropical coastal regions northern Australia using the MEdium Resolution Imaging Spectrometer (MERIS) full mission (2002–2012) reduced resolution dataset. Satellite-derived proxies for (Chlorophyll-a (Chl), Fluorescence Line Height (FLH), Maximum Chlorophyll Index (MCI)) suspended sediment (Total Suspended Matter (TSM)) were jointly analyzed clusters Great Barrier Reef Wet tropics (GBRW; 15°–19.5°S; Queensland) Van Diemen Gulf (VDG; 9°–13°S; Northern Territory). analysis time-series Hovmoller diagrams four MERIS products provided a unique perspective on processes linking river runoff, or resuspension, across spatio-temporal scales. Both are characterized by complex oceanography seasonal inflows sediment, freshwater nutrients during wet season months (November to April). GBRW is great water clarity (Secchi depth 0–25 m). A long history agricultural land use has led large increase discharge sediments nutrients, triggering (>0.4 mg∙m−3) between January April. In contrast, VDG poorly flushed, turbid 1.0 than GBRW, occurring up twice year Over 10-year mission, weak decline Chl TSM observed (Sen slope: −2.85%/decade, τ = −0.32 −3.57%/decade, −0.24; p 0.05), while no significant trend those satellite GBRW. Cyanobacteria surface algal occur both August October. MCI FLH found adequately complement Chl, relevant insight assessment resuspension runoff.