Measuring Deep-Ocean Oxygen with Microscopic Magnetic Fossils
4 Articles
4 Articles
Measuring Deep-Ocean Oxygen with Microscopic Magnetic Fossils
Source: Geophysical Research Letters Humanity’s ongoing disruption of atmospheric carbon dioxide (CO2) concentrations, temperatures, and global nutrient cycles is starving the oceans of oxygen. Although we can measure ongoing changes to ocean circulation and marine life, we still don’t know how far the oxygen loss and the damage to ocean ecosystems could go. One way to foresee the oceans’ future is to look back at how our seas and their inhabita…
Some bacteria leave tiny magnetic crystals in marine deposits. Their shape seems to reveal more than previously assumed: A new calibration combines different crystal types with the oxygen content of the deep water. Thus, earlier oxygen concentrations could also be estimated where other geological indicators can be used only to a limited extent. Edinburgh (Scotland). How much oxygen is dissolved in the depths of the oceans, [...] The article Magn…
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