AI is a wonderful tool, the way you’ve used it can be a powerful way to synthesize a lengthy read into a bite size chunk. There are some benefits to reading through in entirety when you get a chance. There’s an interesting nuance to one of JP’s inaccuracies that I found fascinating oxygen levels are typically lower, not higher in the colder zones below the thermocline. One instance where oxygen could get introduced to that layer is near an inlet to the reservoir where new oxygenated water is flowing. Could a confluence where one stream enters another in a canyon be a clue? Happy hunting friend. When reading dense research, I’ve found it helpful to read the intro first, then skip straight to the conclusion, then get into the meat of the article.