Are Declining Oxygen Levels in Global Oceans, Lakes, and Rivers Reaching Unsafe Levels? https://youtu.be/ZZUUq_9dJ38?si=kroYQRuVt7kGASwXA new peer-reviewed paper that examines "aquatic deoxygenation", namely declining dissolved oxygen levels in our global oceans, and freshwater bodies like lakes and rivers is extremely dire.
Essentially, the authors argue that "aquatic deoxygenation" is extremely serious and needs to be added to the 9 planetary boundaries as a tenth, and carefully monitored and assessed.
Feedbacks and interactions between "aquatic deoxygenation" and the existing 9 planetary boundaries are examined in detail.
In addition to discussing this new research paper, I also chat about the geological history of oxygen on Earth to put oxygen levels into context. At present, our atmosphere is 21% oxygen but there were periods in Earth history when it was zero, and also when it reached 35%.
https://aslopubs.onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70434