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

David Blondeau-Patissier, Thomas Schroeder, Vittorio Brando, Stefan Maier, Arnold Dekker, Stuart Phinn

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    Abstract

    The spatial and temporal variability of phytoplankton blooms was investigated in two tropical coastal regions of northern Australia using the MEdium Resolution Imaging Spectrometer (MERIS) full mission (2002-2012) reduced resolution dataset. Satellite-derived proxies for phytoplankton (Chlorophyll-a (Chl), Fluorescence Line Height (FLH), Maximum Chlorophyll Index (MCI)) and suspended sediment (Total Suspended Matter (TSM)) were jointly analyzed for two clusters of the Great Barrier Reef Wet tropics (GBRW; 15°-19.5°S; Queensland) and the Van Diemen Gulf (VDG; 9°-13°S; Northern Territory). The analysis of time-series and Hovmöller diagrams of the four MERIS products provided a unique perspective on the processes linking phytoplankton blooms and river runoff, or resuspension, across spatio-temporal scales. Both regions are characterized by a complex oceanography and seasonal inflows of sediment, freshwater and nutrients during the tropical wet season months (November to April). The GBRW is characterized by a great variability in water clarity (Secchi depth 0-25 m). A long history of agricultural land use has led to a large increase in the seasonal discharge of sediments and nutrients, triggering seasonal phytoplankton blooms (>0.4 mgm-3) between January and April. In contrast, the VDG is a poorly flushed, turbid (Secchi depth ≤5 m) environment with strong tidal-energy (4-8 m) and very limited land use. Phytoplankton blooms here were found to have higher Chl concentrations (>1.0 mgm-3) than in the GBRW, occurring up to twice a year between January and April. Over the 10-year MERIS mission, a weak decline in Chl and TSM was observed for the VDG (Sen slope:-2.85%/decade, τ =-0.32 and-3.57%/decade, τ =-0.24; p « 0.05), while no significant trend in those two satellite products was observed in the GBRW. Cyanobacteria surface algal blooms occur in both regions between August and October. The MCI and FLH products were found to adequately complement Chl, while TSM provided relevant insight for the assessment of sediment resuspension and river runoff.
    Original languageEnglish
    Pages (from-to)2963-2988
    Number of pages26
    JournalRemote Sensing
    Volume6
    Issue number4
    DOIs
    Publication statusPublished - 1 Apr 2014

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    MERIS
    tropical region
    algal bloom
    phytoplankton
    chlorophyll a
    resuspension
    chlorophyll
    fluorescence
    runoff
    land use
    freshwater sediment
    nutrient
    barrier reef
    oceanography
    river
    wet season
    suspended sediment
    sediment
    cyanobacterium
    inflow

    Cite this

    Blondeau-Patissier, D., Schroeder, T., Brando, V., Maier, S., Dekker, A., & Phinn, S. (2014). ESA-MERIS 10-Year Mission Reveals Contrasting Phytoplankton Bloom Dynamics in Two Tropical Regions of Northern Australia. Remote Sensing, 6(4), 2963-2988. https://doi.org/10.3390/rs6042963
    Blondeau-Patissier, David ; Schroeder, Thomas ; Brando, Vittorio ; Maier, Stefan ; Dekker, Arnold ; Phinn, Stuart. / ESA-MERIS 10-Year Mission Reveals Contrasting Phytoplankton Bloom Dynamics in Two Tropical Regions of Northern Australia. In: Remote Sensing. 2014 ; Vol. 6, No. 4. pp. 2963-2988.
    @article{f9657e894e2549b38ea7787d6f9c2ecc,
    title = "ESA-MERIS 10-Year Mission Reveals Contrasting Phytoplankton Bloom Dynamics in Two Tropical Regions of Northern Australia",
    abstract = "The spatial and temporal variability of phytoplankton blooms was investigated in two tropical coastal regions of northern Australia using the MEdium Resolution Imaging Spectrometer (MERIS) full mission (2002-2012) reduced resolution dataset. Satellite-derived proxies for phytoplankton (Chlorophyll-a (Chl), Fluorescence Line Height (FLH), Maximum Chlorophyll Index (MCI)) and suspended sediment (Total Suspended Matter (TSM)) were jointly analyzed for two clusters of the Great Barrier Reef Wet tropics (GBRW; 15°-19.5°S; Queensland) and the Van Diemen Gulf (VDG; 9°-13°S; Northern Territory). The analysis of time-series and Hovm{\"o}ller diagrams of the four MERIS products provided a unique perspective on the processes linking phytoplankton blooms and river runoff, or resuspension, across spatio-temporal scales. Both regions are characterized by a complex oceanography and seasonal inflows of sediment, freshwater and nutrients during the tropical wet season months (November to April). The GBRW is characterized by a great variability in water clarity (Secchi depth 0-25 m). A long history of agricultural land use has led to a large increase in the seasonal discharge of sediments and nutrients, triggering seasonal phytoplankton blooms (>0.4 mgm-3) between January and April. In contrast, the VDG is a poorly flushed, turbid (Secchi depth ≤5 m) environment with strong tidal-energy (4-8 m) and very limited land use. Phytoplankton blooms here were found to have higher Chl concentrations (>1.0 mgm-3) than in the GBRW, occurring up to twice a year between January and April. Over the 10-year MERIS mission, a weak decline in Chl and TSM was observed for the VDG (Sen slope:-2.85{\%}/decade, τ =-0.32 and-3.57{\%}/decade, τ =-0.24; p « 0.05), while no significant trend in those two satellite products was observed in the GBRW. Cyanobacteria surface algal blooms occur in both regions between August and October. The MCI and FLH products were found to adequately complement Chl, while TSM provided relevant insight for the assessment of sediment resuspension and river runoff.",
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    author = "David Blondeau-Patissier and Thomas Schroeder and Vittorio Brando and Stefan Maier and Arnold Dekker and Stuart Phinn",
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    Blondeau-Patissier, D, Schroeder, T, Brando, V, Maier, S, Dekker, A & Phinn, S 2014, 'ESA-MERIS 10-Year Mission Reveals Contrasting Phytoplankton Bloom Dynamics in Two Tropical Regions of Northern Australia', Remote Sensing, vol. 6, no. 4, pp. 2963-2988. https://doi.org/10.3390/rs6042963

    ESA-MERIS 10-Year Mission Reveals Contrasting Phytoplankton Bloom Dynamics in Two Tropical Regions of Northern Australia. / Blondeau-Patissier, David; Schroeder, Thomas; Brando, Vittorio; Maier, Stefan; Dekker, Arnold; Phinn, Stuart.

    In: Remote Sensing, Vol. 6, No. 4, 01.04.2014, p. 2963-2988.

    Research output: Contribution to journalArticleResearchpeer-review

    TY - JOUR

    T1 - ESA-MERIS 10-Year Mission Reveals Contrasting Phytoplankton Bloom Dynamics in Two Tropical Regions of Northern Australia

    AU - Blondeau-Patissier, David

    AU - Schroeder, Thomas

    AU - Brando, Vittorio

    AU - Maier, Stefan

    AU - Dekker, Arnold

    AU - Phinn, Stuart

    PY - 2014/4/1

    Y1 - 2014/4/1

    N2 - The spatial and temporal variability of phytoplankton blooms was investigated in two tropical coastal regions of northern Australia using the MEdium Resolution Imaging Spectrometer (MERIS) full mission (2002-2012) reduced resolution dataset. Satellite-derived proxies for phytoplankton (Chlorophyll-a (Chl), Fluorescence Line Height (FLH), Maximum Chlorophyll Index (MCI)) and suspended sediment (Total Suspended Matter (TSM)) were jointly analyzed for two clusters of the Great Barrier Reef Wet tropics (GBRW; 15°-19.5°S; Queensland) and the Van Diemen Gulf (VDG; 9°-13°S; Northern Territory). The analysis of time-series and Hovmöller diagrams of the four MERIS products provided a unique perspective on the processes linking phytoplankton blooms and river runoff, or resuspension, across spatio-temporal scales. Both regions are characterized by a complex oceanography and seasonal inflows of sediment, freshwater and nutrients during the tropical wet season months (November to April). The GBRW is characterized by a great variability in water clarity (Secchi depth 0-25 m). A long history of agricultural land use has led to a large increase in the seasonal discharge of sediments and nutrients, triggering seasonal phytoplankton blooms (>0.4 mgm-3) between January and April. In contrast, the VDG is a poorly flushed, turbid (Secchi depth ≤5 m) environment with strong tidal-energy (4-8 m) and very limited land use. Phytoplankton blooms here were found to have higher Chl concentrations (>1.0 mgm-3) than in the GBRW, occurring up to twice a year between January and April. Over the 10-year MERIS mission, a weak decline in Chl and TSM was observed for the VDG (Sen slope:-2.85%/decade, τ =-0.32 and-3.57%/decade, τ =-0.24; p « 0.05), while no significant trend in those two satellite products was observed in the GBRW. Cyanobacteria surface algal blooms occur in both regions between August and October. The MCI and FLH products were found to adequately complement Chl, while TSM provided relevant insight for the assessment of sediment resuspension and river runoff.

    AB - The spatial and temporal variability of phytoplankton blooms was investigated in two tropical coastal regions of northern Australia using the MEdium Resolution Imaging Spectrometer (MERIS) full mission (2002-2012) reduced resolution dataset. Satellite-derived proxies for phytoplankton (Chlorophyll-a (Chl), Fluorescence Line Height (FLH), Maximum Chlorophyll Index (MCI)) and suspended sediment (Total Suspended Matter (TSM)) were jointly analyzed for two clusters of the Great Barrier Reef Wet tropics (GBRW; 15°-19.5°S; Queensland) and the Van Diemen Gulf (VDG; 9°-13°S; Northern Territory). The analysis of time-series and Hovmöller diagrams of the four MERIS products provided a unique perspective on the processes linking phytoplankton blooms and river runoff, or resuspension, across spatio-temporal scales. Both regions are characterized by a complex oceanography and seasonal inflows of sediment, freshwater and nutrients during the tropical wet season months (November to April). The GBRW is characterized by a great variability in water clarity (Secchi depth 0-25 m). A long history of agricultural land use has led to a large increase in the seasonal discharge of sediments and nutrients, triggering seasonal phytoplankton blooms (>0.4 mgm-3) between January and April. In contrast, the VDG is a poorly flushed, turbid (Secchi depth ≤5 m) environment with strong tidal-energy (4-8 m) and very limited land use. Phytoplankton blooms here were found to have higher Chl concentrations (>1.0 mgm-3) than in the GBRW, occurring up to twice a year between January and April. Over the 10-year MERIS mission, a weak decline in Chl and TSM was observed for the VDG (Sen slope:-2.85%/decade, τ =-0.32 and-3.57%/decade, τ =-0.24; p « 0.05), while no significant trend in those two satellite products was observed in the GBRW. Cyanobacteria surface algal blooms occur in both regions between August and October. The MCI and FLH products were found to adequately complement Chl, while TSM provided relevant insight for the assessment of sediment resuspension and river runoff.

    KW - FLH

    KW - Great Barrier Reef

    KW - MCI

    KW - MERIS

    KW - Spatiotemporal patterns

    KW - Tropical waters

    KW - Van Diemen Gulf

    KW - Wet tropics

    KW - Chlorophyll

    KW - Nutrients

    KW - Reefs

    KW - Runoff

    KW - Sediments

    KW - Tidal power

    KW - Time series analysis

    KW - Tropics

    KW - Phytoplankton

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    SP - 2963

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    JO - Remote Sensing

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    ER -