AIMS eReefs THREDDS

GBR 4km BioGeoChemical (BGC) model: Baseline scenario

The GBR4 BioGeoChemical (BGC) model builds on the GBR4 hydrodynamic model by modelling the water quality (nutrients and suspended sediment) and key ecological processes (coral, seagrass, plankton) that drive the water chemistry. This model allows us to better understand how water quality is affected by land runoff.

For more information, see eReefs models - Biogeochemistry and ecology

Meaning of the model name: GBR4_H2p0_B3p1_Cq3b_Dhnd

  • GBR4: Great Barrier Reef model with a grid of approximately 4 kilometres resolution.
  • H2p0: Hydrodynamic model version 2.0
  • B3p1: Biogeochemical model version 3.1
  • Cq3b: Catchment model using load specification q3b. P2R SOURCE Catchments with 2019 catchment condition from Dec 1, 2010 - 30/6/2018 (used for GBR Report Card 8 published in 2019), Empirical SOURCE with 2019 catchment condition, Jul 1, 2018 - April 30, 2019.
  • Dhnd: Model deployment - Hindcast

For more information about the biogeochemical model naming protocol, see Biogeochemical simulation naming protocol

Metadata record:

Files

The files for this model are grouped by time-steps.

NOTE: The variables from the original model were split into two files. The sediment variables can be found in the file with the -sed suffix, while the other variables are found in the file without the -sed suffix.

File description
ID Time range of the time dimension Time range of the file Description
daily-monthly 1 day 1 month This folder contains one file per month. The time dimension contains one value for each day of the month, each day represents an aggregation of the data for that day.
monthly-monthly 1 month 1 month This folder contains one file per month. The time dimension contains a single value per file, which represents an aggregation of all the data for the given month.
annual-annual 1 year 1 year This folder contains one file per year. The time dimension contains a single value per file, which represents an aggregation of all the data for the given year.
all-one All time All time This folder contains a single file. The time dimension contains a single value, which represents an aggregation of all the data that was produced for this model.
daily and
daily-sed 		1 day All time The file contains all the data produced for this model, aggregated per day.
monthly and
monthly-sed 		1 month All time The file contains all the data produced for this model, aggregated per month.
annual and
annual-sed 		1 year All time The file contains all the data produced for this model, aggregated per year.

Data visualisation

Some variables from this model are rendered in the eReefs AIMS Visualisation Portal.

Water Chemistry

Variables available for visualisation
Product name Files List of variables
Total alkalinity, PH & Aragonite saturation state
  • Total alkalinity (alk)
  • PH (PH)
  • Aragonite saturation state (omega_ar)
Dissolved inorganic nitrogen, nitrate & ammonia
  • Dissolved Inorganic Nitrogen (DIN)
  • Nitrate (NO3)
  • Ammonia (NH4)
Dissolved Oxygen & oxygen saturation percentage
  • Dissolved Oxygen (Oxygen)
  • Oxygen saturation percentage (Oxy_sat)
Dissolved Inorganic (Carbon, Nitrogen & Phosphorus)
  • Dissolved Inorganic Nitrogen (DIN)
  • Dissolved Inorganic Phosphorus (DIP)
  • Dissolved Inorganic Carbon (DIC)
Dissolved Organic (Carbon, Nitrogen & Phosphorus)
  • Dissolved Organic Carbon (DOR_C)
  • Dissolved Organic Nitrogen (DOR_N)
  • Dissolved Organic Phosphorus (DOR_P)
Particulate inorganic phosphorus & particulate inorganic
  • Particulate Inorganic Phosphorus (PIP)
  • Particulate Inorganic Phos. sed. (PIP_sed)

Water Quality Measures

Variables available for visualisation
Product name Files List of variables
Total chlorophyll, dissolved inorganic nitrogen & total suspended solids
  • Total Chlorophyll (Chl_a_sum)
  • Dissolved Inorganic Nitrogen (DIN)
  • Total Suspended Solids (EFI)
Total Suspended Solids, dust, mud carbonate & mud mineral
  • Total Suspended Solids (EFI)
  • Dust (Dust)
  • Mud carbonate (Mud_carbonate)
  • Mud mineral (Mud_mineral)
Secchi depth, vertical attenuation at 490nm & light intensity above seagrass
  • Secchi depth (Secchi)
  • Vertical attenuation at 490nm (Kd_490)
  • Light intensity above seagrass (EpiPAR_sg)
Simulated true colour
  • Remote-sensing reflectance at 470nm (R_470)
  • Remote-sensing reflectance at 555nm (R_555)
  • Remote-sensing reflectance at 645nm (R_645)

Macroalgae, seagrass and coral

Variables available for visualisation
Product name Files List of variables
Coral symbiont (nitrogen & chlorophyll) & coral host nitrogen
  • Coral symbiont N (CS_N)
  • Coral symbiont Chl (CS_Chl)
  • Coral host N (CH_N)
Nitrogen (macroalgae, seagrass zostera, seagrass halophila & deep seagrass)
  • Macroalgae N (MA_N)
  • Seagrass Zostera N (SG_N)
  • Seagrass Halophila N (SGH_N)
  • Deep seagrass N (SGD_N)

See also

Original eReefs model outputs (NCI)

To extract data from the model output, see eReefs Data Extraction Tool

For information about how to use these files, see eReefs AIMS - Help pages