Table 1.
Temperature metrics across Heron Reef by site and year
| Period | Site | Mean | SE | Minimum | Maximum | Mean daily amplitude | SE | Degree heating weeks |
|---|---|---|---|---|---|---|---|---|
| Sept 2015–Aug 2016 | Harry's Bommie 5 m | 24.36 | 0.02 | 17.37 | 28.31 | 1.06 | 0.03 | 0.00 |
| Harry's Bommie 8 m | 24.56 | 0.02 | 19.75 | 28.25 | 0.81 | 0.02 | 0.00 | |
| Fourth Point 5 m | 24.44 | 0.02 | 16.34 | 28.60 | 1.27 | 0.03 | 0.00 | |
| Reef crest | 24.51 | 0.03 | 17.54 | 32.17 | 2.81 | 0.07 | 0.00 | |
| Reef flat | 23.97 | 0.03 | 18.04 | 31.80 | 2.96 | 0.06 | 2.85 | |
| Shallow lagoon | 24.91 | 0.03 | 18.74 | 30.92 | 2.22 | 0.05 | 2.26 | |
| Deep lagoon | 24.45 | 0.03 | 18.96 | 30.02 | 1.34 | 0.03 | 2.25 | |
| Sept 2019– Aug 2020 | Harry's Bommie 5 m | 24.85 | 0.02 | 20.04 | 29.35 | 1.11 | 0.02 | 5.60 |
| Harry's Bommie 8 m$ | 25.50 | 0.03 | 21.57 | 29.35 | 0.53 | 0.03 | ||
| Fourth Point 5 m | Temperature logger lost | |||||||
| Reef crest* | 24.22 | 0.04 | 17.48 | 33.22 | 2.43 | 0.08 | ||
| Reef flat | 25.32 | 0.03 | 18.05 | 36.49 | 4.45 | 0.10 | 7.84 | |
| Shallow lagoon | 24.85 | 0.03 | 18.33 | 31.47 | 2.23 | 0.05 | 7.51 | |
| Deep lagoon* | 26.06 | 0.04 | 22.62 | 30.05 | 1.21 | 0.05 | ||
Degree heating weeks were not calculated for sites where a complete temperature record was not obtained
* Data recorded from December 2019
$ Data recorded from February 2020