Information for GBR4 BGC Reduced 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_Cq3R_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
• Cq3R: Catchment model using load specification q3R. SOURCE Catchments with 2019 catchment condition (q3b) with anthropogenic loads (q3b - q3p) reduced according to the percentage reductions of DIN, PN, PP and TSS specified in the Reef 2050 Water Quality Improvement Plan (WQIP) 2017-2022 as calculated in Brodie et al., (2017). Further, the reductions are adjusted to account for the cumulative reductions already achieved between 2014 and 2019 that will be reflected in the 2019 catchment condition used in q3b.
• Dhnd: Model deployment - Hindcast

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

Metadata record:

• eReefs AIMS-CSIRO Aggregations of biogeochemistry model outputs

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.

There is currently no data visualisation for this model. Please, refer to the baseline model for visualisation of a similar model.

Original eReefs model outputs (NCI)

• eReefs GBR4 biogeochemistry and sediments v3.1 reduced loads catchment scenario

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