pH, %DO and Temperatures January 2026

Environmental conditions at the beginning of the year!

The data show relatively stable environmental conditions over the monitoring period, with small but meaningful short-term variations.

pH and temperature:

pH exhibits a gradual decreasing trend from 8.06 to 8.00, remaining well within the normal range for healthy tropical reef systems. This slight decline is likely linked to increasing temperature and daily biological processes such as respiration and reduced nighttime photosynthesis. Sea temperature shows minor fluctuations around 28.3–28.4 °C, with a small peak mid-period, consistent with typical seasonal variability rather than any anomalous warming event.

Dissolved oxygen and temperature:

Dissolved oxygen (DO) remains consistently high (7.8–8.4 mg/L) for most of the period, indicating good water mixing and active photosynthetic input. A slight decline in DO toward the end of the period coincides with higher temperatures, reflecting the expected inverse relationship between temperature and oxygen solubility. Despite this decrease, oxygen levels stay well above stress thresholds for coral reef organisms.

Overall, the combined trends suggest a well-balanced reef environment, with natural coupling between temperature, pH, and dissolved oxygen. No signs of hypoxia or abnormal acidification are evident, and conditions appear favorable for coral reef metabolism and overall ecosystem health during the monitoring period.

Coming soon the average monthly temperatures of the past year, 2025!