Arnold Dekker | CSIRO - Academia.edu (original) (raw)

Papers by Arnold Dekker

Research paper thumbnail of Improving light propagation in coastal biogeochemical models: A case study in tropical coastal waters of Australia

Ocean Optics Conference XIX, 2008

Research paper thumbnail of Assimilation of Optical Remote Sensing Data into Coastal Aquatic Biogeochemical Models

Understanding of the transformation and transportation of particulate and dissolved substances an... more Understanding of the transformation and transportation of particulate and dissolved substances and of ecological responses to changes in these is critical to management of coastal aquatic ecosystems. Coastal environmental models that are capable of representing complex estuarine and coastal ocean circulation, sediment transport and biogeochemical (BGC) processes now exist. However, such environmental models are simplified representations of natural processes.

Research paper thumbnail of Toward assimilation of ocean colour satellite observation into coastal ocean biogeochemical models: the tropical Fitzroy River Estuary case study

We present the first results of the assimilation of ocean colour datasets into coastal ocean biog... more We present the first results of the assimilation of ocean colour datasets into coastal ocean biogeochemical models for the tropical Fitzroy Estuary and Keppel Bay system (FEKB) contingent to the Great Barrier Reef lagoon. As part of the Great Barrier Reef Monitoring Program, a regional algorithm for operational delivery of valid coastal ocean colour products was recently developed for FEKB. A new generation of regional specific algorithm for the FEKB system had to be developed for large satellite datasets of the MODIS sensors as the global algorithms failed. Concurrently, a biogeochemical model was developed for the system, built upon a three-dimensional hydrodynamic and sediment dynamic model, and simulating nitrogen and phosphorus dynamics including the dynamics of dissolved organic material as well as pelagic and benthic primary production. One of the aims was to provide estimates of material fluxes from Keppel Bay to the Great Barrier Reef Lagoon. The biogeochemical model was run first with fixed boundary conditions based on the limited in situ measurements, then with boundary conditions derived from satellite datasets using the region-specific algorithm. Several methodologies for linking of remote sensing observations to model variables were evaluated over a period of one year (2004). When remote sensing information was used to inform the boundaries, estimates of material fluxes in the model changed substantially in magnitude and direction.

Research paper thumbnail of Remote sensing for inland water quality detection and monitoring: State-of-the-art application in Friesland waters

GIS and Remote Sensing Techniques in Land- and Water-management, 2001

Research paper thumbnail of Toward a Global Water Quality Observing and Forecasting System

Research paper thumbnail of Rapid, high-resolution detection of environmental change over continental scales from satellite data – the Earth Observation Data Cube

International Journal of Digital Earth, 2015

Research paper thumbnail of Application of remote sensing techniques for water quality monitoring

Abstract-This paper describes the importance and capabilities of modern techniques such as remote... more Abstract-This paper describes the importance and capabilities of modern techniques such as remote sensing (RS) and geographic information systems (GIS) as water resource management and conservation tool. RS/GIS analysis can show where water enters a system and how it ...

Research paper thumbnail of Coral Reef Habitat Mapping Using MERIS: Can MERIS Detect Coral Bleaching?

Meris Atsr Workshop 2005, Nov 29, 2005

Research paper thumbnail of OPTISCHE TELEDETECTIE VAN WATERKWALITEITSPARAMETERS : DEMONSTRATIE VOOR HET WATERBEHEER

Research paper thumbnail of Phytoplankton response to episodic events and long-term trends in the Great Barrier Reef lagoonal waters: towards a regional characterization

Research paper thumbnail of Retrospective seagrass change detection in a shallow coastal tidal Australian lake

Remote Sensing of Environment, Sep 1, 2005

Research paper thumbnail of THE AUSTRALIAN MERIS VALIDATION PROJECT (AO595): FIRST RESULTS

Research paper thumbnail of Observations of the largest Italian lakes from MERIS

Research paper thumbnail of The Particle Swarm Optimisation for Spectral Matching Applied to Inland Water Quality Remote Sensing

Research paper thumbnail of The Value of Earth Observation for Managing the Great Barrier Reef

Research paper thumbnail of REMOTE SENSING OF APPARENT AND INHERENT OPTICAL PROPERTIES OF TASMANIAN COASTAL WATERS: APPLICATION TO MODIS DATA*)

To derive accurate chlorophyll estimates from remote sensing data of Tasmania's colou... more To derive accurate chlorophyll estimates from remote sensing data of Tasmania's coloured dissolved organic material (CDOM) dominated coastal waters we developed and applied a coupling of atmospheric and in-water inversion algorithms. These algorithms derive apparent and inherent optical properties from spectral radiance measurements of the Moderate Resolution Imaging Spectrometer (MODIS) on-board the NASA Earth Observation Systems (EOS) Terra and Aqua

Research paper thumbnail of Hyperspectral imaging for benthic species recognition in shallow coastal waters

IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217), 2001

Airborne hyperspectral data was collected in April 1999 over 16 square kilometres of coastal wate... more Airborne hyperspectral data was collected in April 1999 over 16 square kilometres of coastal waters adjacent to the South Australian Bolivar Wastewater Treatment Plant (near Adelaide). Concurrent in situ measurements of benthic reflectances were collected. A subsequent field-work mission to validate the 1999 image analysis was completed in February 2000. The aim was to map substrate type accurately, differentiating species

Research paper thumbnail of Improved underwater light climate model for biogeochemical models: a semi-analytical model for tropical coastal environment, Fitzroy Estuary and Keppel Bay, Australia

Estimating the light propagation accurately is critical in biogeochemical models. As this paramet... more Estimating the light propagation accurately is critical in biogeochemical models. As this parameter controls processes such as photosynthesis, heat flux and biological growth, in the ecosystem. At present many models use empirical relationships between apparent optical properties and chlorophyll to estimate the light propagation in terms of a diffuse attenuation coefficient. Such an approach contains large uncertainties inherent to empirical algorithms and they are specifically unsuitable to use in coastal waters dominated by non-planktonic material such as Chromophoric Dissolved Organic Matter (CDOM) and non-algal particulate (NAP) matter. A biogeochemical model for Fitzroy Estuary and Keppel Bay (FEKB) which is based on the concepts of Model for Estuaries and Coastal Oceans (MECO), developed at CSIRO was used in this research work. The FEKB biogeochemical model is built on a three-dimensional hydrodynamic and sediment dynamic model and is capable of simulating various biological p...

Research paper thumbnail of Inherent optical property based light propagation model for Tasmanian coastal waters

Estimating the underwater light propagation accurately is critical in biogeochemical models, as t... more Estimating the underwater light propagation accurately is critical in biogeochemical models, as this parameter controls processes such as photosynthesis, heat flux and biological growth, in the ecosystem. Better estimates of underwater light propagation in coastal waters can be achieved when the inherent optical properties (IOP) of optically active substances such as coloured dissolved organic matter and non-algal particulate matter and phytoplankton are understood and included in the light propagation models. IOP models will also facilitate the direct use of remote sensing derived optical parameters to constrain the biogeochemical models. Here we detail specific IOP and bio-optical relationships observed in the coastal waters of Tasmania, using which an underwater light propagation model for south-eastern coast of Tasmania has been developed. Finally we present the influence of various IOPs on underwater light propagation in this study area. This modelling activity forms part of th...

Research paper thumbnail of Aquatic Optics: Basic Concepts for Understanding How Light Affects Seagrasses and Makes them Measurable from Space

Seagrasses: Biology, Ecology and Conservation, 2006

... Agric Forest Meterol 43: 155–169 Kirk JTO (1994) Light and photosynthesis in aquatic ecosyste... more ... Agric Forest Meterol 43: 155–169 Kirk JTO (1994) Light and photosynthesis in aquatic ecosystems. ... J Quant Spectrosc Radiat Transfer 39: 115–129 Zimmerman R (2003) A biooptical model of irradiance dis-tribution and photosynthesis in seagrass canopies. ...

Research paper thumbnail of Improving light propagation in coastal biogeochemical models: A case study in tropical coastal waters of Australia

Ocean Optics Conference XIX, 2008

Research paper thumbnail of Assimilation of Optical Remote Sensing Data into Coastal Aquatic Biogeochemical Models

Understanding of the transformation and transportation of particulate and dissolved substances an... more Understanding of the transformation and transportation of particulate and dissolved substances and of ecological responses to changes in these is critical to management of coastal aquatic ecosystems. Coastal environmental models that are capable of representing complex estuarine and coastal ocean circulation, sediment transport and biogeochemical (BGC) processes now exist. However, such environmental models are simplified representations of natural processes.

Research paper thumbnail of Toward assimilation of ocean colour satellite observation into coastal ocean biogeochemical models: the tropical Fitzroy River Estuary case study

We present the first results of the assimilation of ocean colour datasets into coastal ocean biog... more We present the first results of the assimilation of ocean colour datasets into coastal ocean biogeochemical models for the tropical Fitzroy Estuary and Keppel Bay system (FEKB) contingent to the Great Barrier Reef lagoon. As part of the Great Barrier Reef Monitoring Program, a regional algorithm for operational delivery of valid coastal ocean colour products was recently developed for FEKB. A new generation of regional specific algorithm for the FEKB system had to be developed for large satellite datasets of the MODIS sensors as the global algorithms failed. Concurrently, a biogeochemical model was developed for the system, built upon a three-dimensional hydrodynamic and sediment dynamic model, and simulating nitrogen and phosphorus dynamics including the dynamics of dissolved organic material as well as pelagic and benthic primary production. One of the aims was to provide estimates of material fluxes from Keppel Bay to the Great Barrier Reef Lagoon. The biogeochemical model was run first with fixed boundary conditions based on the limited in situ measurements, then with boundary conditions derived from satellite datasets using the region-specific algorithm. Several methodologies for linking of remote sensing observations to model variables were evaluated over a period of one year (2004). When remote sensing information was used to inform the boundaries, estimates of material fluxes in the model changed substantially in magnitude and direction.

Research paper thumbnail of Remote sensing for inland water quality detection and monitoring: State-of-the-art application in Friesland waters

GIS and Remote Sensing Techniques in Land- and Water-management, 2001

Research paper thumbnail of Toward a Global Water Quality Observing and Forecasting System

Research paper thumbnail of Rapid, high-resolution detection of environmental change over continental scales from satellite data – the Earth Observation Data Cube

International Journal of Digital Earth, 2015

Research paper thumbnail of Application of remote sensing techniques for water quality monitoring

Abstract-This paper describes the importance and capabilities of modern techniques such as remote... more Abstract-This paper describes the importance and capabilities of modern techniques such as remote sensing (RS) and geographic information systems (GIS) as water resource management and conservation tool. RS/GIS analysis can show where water enters a system and how it ...

Research paper thumbnail of Coral Reef Habitat Mapping Using MERIS: Can MERIS Detect Coral Bleaching?

Meris Atsr Workshop 2005, Nov 29, 2005

Research paper thumbnail of OPTISCHE TELEDETECTIE VAN WATERKWALITEITSPARAMETERS : DEMONSTRATIE VOOR HET WATERBEHEER

Research paper thumbnail of Phytoplankton response to episodic events and long-term trends in the Great Barrier Reef lagoonal waters: towards a regional characterization

Research paper thumbnail of Retrospective seagrass change detection in a shallow coastal tidal Australian lake

Remote Sensing of Environment, Sep 1, 2005

Research paper thumbnail of THE AUSTRALIAN MERIS VALIDATION PROJECT (AO595): FIRST RESULTS

Research paper thumbnail of Observations of the largest Italian lakes from MERIS

Research paper thumbnail of The Particle Swarm Optimisation for Spectral Matching Applied to Inland Water Quality Remote Sensing

Research paper thumbnail of The Value of Earth Observation for Managing the Great Barrier Reef

Research paper thumbnail of REMOTE SENSING OF APPARENT AND INHERENT OPTICAL PROPERTIES OF TASMANIAN COASTAL WATERS: APPLICATION TO MODIS DATA*)

To derive accurate chlorophyll estimates from remote sensing data of Tasmania's colou... more To derive accurate chlorophyll estimates from remote sensing data of Tasmania's coloured dissolved organic material (CDOM) dominated coastal waters we developed and applied a coupling of atmospheric and in-water inversion algorithms. These algorithms derive apparent and inherent optical properties from spectral radiance measurements of the Moderate Resolution Imaging Spectrometer (MODIS) on-board the NASA Earth Observation Systems (EOS) Terra and Aqua

Research paper thumbnail of Hyperspectral imaging for benthic species recognition in shallow coastal waters

IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217), 2001

Airborne hyperspectral data was collected in April 1999 over 16 square kilometres of coastal wate... more Airborne hyperspectral data was collected in April 1999 over 16 square kilometres of coastal waters adjacent to the South Australian Bolivar Wastewater Treatment Plant (near Adelaide). Concurrent in situ measurements of benthic reflectances were collected. A subsequent field-work mission to validate the 1999 image analysis was completed in February 2000. The aim was to map substrate type accurately, differentiating species

Research paper thumbnail of Improved underwater light climate model for biogeochemical models: a semi-analytical model for tropical coastal environment, Fitzroy Estuary and Keppel Bay, Australia

Estimating the light propagation accurately is critical in biogeochemical models. As this paramet... more Estimating the light propagation accurately is critical in biogeochemical models. As this parameter controls processes such as photosynthesis, heat flux and biological growth, in the ecosystem. At present many models use empirical relationships between apparent optical properties and chlorophyll to estimate the light propagation in terms of a diffuse attenuation coefficient. Such an approach contains large uncertainties inherent to empirical algorithms and they are specifically unsuitable to use in coastal waters dominated by non-planktonic material such as Chromophoric Dissolved Organic Matter (CDOM) and non-algal particulate (NAP) matter. A biogeochemical model for Fitzroy Estuary and Keppel Bay (FEKB) which is based on the concepts of Model for Estuaries and Coastal Oceans (MECO), developed at CSIRO was used in this research work. The FEKB biogeochemical model is built on a three-dimensional hydrodynamic and sediment dynamic model and is capable of simulating various biological p...

Research paper thumbnail of Inherent optical property based light propagation model for Tasmanian coastal waters

Estimating the underwater light propagation accurately is critical in biogeochemical models, as t... more Estimating the underwater light propagation accurately is critical in biogeochemical models, as this parameter controls processes such as photosynthesis, heat flux and biological growth, in the ecosystem. Better estimates of underwater light propagation in coastal waters can be achieved when the inherent optical properties (IOP) of optically active substances such as coloured dissolved organic matter and non-algal particulate matter and phytoplankton are understood and included in the light propagation models. IOP models will also facilitate the direct use of remote sensing derived optical parameters to constrain the biogeochemical models. Here we detail specific IOP and bio-optical relationships observed in the coastal waters of Tasmania, using which an underwater light propagation model for south-eastern coast of Tasmania has been developed. Finally we present the influence of various IOPs on underwater light propagation in this study area. This modelling activity forms part of th...

Research paper thumbnail of Aquatic Optics: Basic Concepts for Understanding How Light Affects Seagrasses and Makes them Measurable from Space

Seagrasses: Biology, Ecology and Conservation, 2006

... Agric Forest Meterol 43: 155–169 Kirk JTO (1994) Light and photosynthesis in aquatic ecosyste... more ... Agric Forest Meterol 43: 155–169 Kirk JTO (1994) Light and photosynthesis in aquatic ecosystems. ... J Quant Spectrosc Radiat Transfer 39: 115–129 Zimmerman R (2003) A biooptical model of irradiance dis-tribution and photosynthesis in seagrass canopies. ...