Ocean ‘acidification’ explained

Ocean ‘acidification’ explained

The ‘climate scientists’ would have us believe that 0.1 drop in Ph is really very very bad. Absurd press release here We are all going to die

Reality check, Ph of oceans varies :

Dynamic patterns and ecological impacts of declining ocean pH in a high-resolution multi-year dataset


Our data demonstrate that ocean pH exhibits strong dynamic patterns over multiple temporal scales (translation: Ph of oceans is never stable), which can be linked to variation in key physical and biological drivers with known mechanistic ties to pH. Across years, pH declined strongly inassociation with increases in atmospheric CO2. Over diurnal timescales, pH also showed strong systematic variation as a result of the interplay between uptake of CO2 via photosynthesis and release of CO2 via respiration.

Ocean pH also exhibited variability at the seasonal time scale, but these patterns were more complex, with some years showing systematic increases and some showing systematic declines. This complexity is linked to annual variability in the seasonal patterns of drivers of pH Two factors tend to increase pH seasonally: atmospheric CO2 declines during the summer as it is removed by terrestrial photosynthesis, and increased solar radiation tends to increase water temperature, which reduces CO2 solubility.


Examination of 24,519 measurements of coastal ocean pHspanning 8 years (Fig. 1) revealed several patterns. First, in contrast to the historical perspective that the ocean is well buffered, pH exhibited a pronounced 24-hour cycle, spanning 0.24 units during a typical day. This diurnal oscillation is readily explained by daily variation in photosynthesis and background respiration: water pH increases as CO2 is taken up,via photosynthesis, over the course of the day, and then declines as respiration and diffusion from the atmosphere replenish CO2 overnight. Second, pH fluctuated substantially among days and years, ranging across a unit or more within any given year and 1.5 units over the study period.

Source PNAS

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