Figure 1.
Map showing the sampling stations (•) where surface samples were collected during cruises aboard R/V Cape Ferguson over the period September 2011 to November 2013.
Inshore monitoring stations, from north to south, are: Snapper Island, Fitzroy Island, High Island, Frankland Island, Dunk Island, Pelorus Island, Pandora Reef, Geoffrey Bay, Double Cone Island, Daydream Island, Pine Island, Humpy and Halfway Islands, Pelican Island, Barren Island, with separate colours representing separate regions as indicated in the legend. Yellow dots indicate mid- and outer-shelf reefs, from north to south: Mantis Reef, Wreck Bay, Fairway Channel, Shipping Channel, Tydeman Reef, Lizard Island, Arlington Reef, Twin Cays, Elusive Reef, Swains Reefs, Inner Swains.
Table 1.
Biological, chemical and physical properties of water samples at the time of collection between 2011 and 2013.
Figure 2.
Total Alkalinity (TA) and dissolved inorganic carbon (DIC) data for each island station, sorted from north to south, during each Visit and for each of the three Locations.
Regions are colour coded as per Fig. 1. Note that duplicates are plotted but in most cases cannot be distinguished because of the low between-duplicate variance.
Figure 3.
Measured Temperature, Salinity, Total Alkalinity (TA) and dissolved inorganic carbon (DIC) on 14 inshore reefs during six research trips in four geographical regions along the length of the Great Barrier Reef.
The box denotes the inter-quartile range, whiskers denote 1.5× the inter-quartile range, the black line indicates the mean, and circles are outliers>1.5× the inter-quartile range.
Table 2.
Mixed model ANOVA for measured parameters Total Alkalinity (TA) and dissolved inorganic carbon (DIC).
Table 3.
A summary of carbon chemistry of water samples collected during 2011 to 2013 in the Great Barrier Reef region.
Figure 4.
Relationships between salinity normalized dissolved inorganic carbon (DICS) and salinity normalized Total Alkalinity (TAS) for the a) Wet-tropics, b) Burdekin, c) Whitsundays, d) Fitzroy and e) offshore shelf regions of the Great Barrier Reef.
The regression lines and corresponding equations were obtained using model II linear regression. r2: coefficient of determination; p: significance level.
Figure 5.
Derived parameters at 14 inshore reefs during six research trips in four geographic regions along the length of the Great Barrier Reef.
Ωar = Aragonite saturation state. The box denotes the inter-quartile range, whiskers denote 1.5× the inter-quartile range, the black line indicates the mean, and circles are outliers >1.5× the inter-quartile range.
Table 4.
Mixed model ANOVA for derived parameters partial pressure of carbon dioxide (pCO2), pH[Total] and aragonite saturation state (Ωar).
Figure 6.
Principal component analysis of carbonate chemistry data for four inshore regions of the Great Barrier Reef (GBR) over three different seasons.
Data are contrasted to those from the mid- and outer-shelf reefs of the GBR. Inshore data were pooled over regions per sampling Visit.
Table 5.
Summary table of historic (1982/83; 1996) and present (2011 to 2013) data from inshore, mid-and outer-shelf reefs for partial pressure of carbon dioxide in the water (pCO2 water), aragonite saturation state (Ωar) and partial pressure of carbon dioxide in the atmosphere (pCO2 atmosphere).