How does temperature affect Dissolved Oxygen solubility?

Document ID

Document ID TE2859

Published Date

Published Date 07/10/2018
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Question
How does temperature affect Dissolved Oxygen solubility?
Summary
Effect of temperature on Dissolved Oxygen solubility
Answer
The solubility of oxygen decreases as temperature increases. This means that warmer surface water requires less dissolved oxygen to reach 100% air saturation than does deeper, cooler water. For example, at sea level (1 atm or 760 mm Hg) and 4 deg C (39 deg F), 100% air-saturated water would hold 10.92 mg/L of dissolved oxygen. However, if the temperature were raised to room temperature, 21 deg C (70 deg F), there would only be 8.68 mg/L DO at 100% air saturation.

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