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Author Topic: Ocean oxygen levels  (Read 211 times)

Juan C. García

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Ocean oxygen levels
« on: February 28, 2019, 07:51:01 AM »
Quote
Widespread and sometimes drastic marine oxygen declines are stressing sensitive species—a trend that will continue with climate change
...
In the past decade ocean oxygen levels have taken a dive—an alarming trend that is linked to climate change, says Andreas Oschlies, an oceanographer at the Helmholtz Center for Ocean Research Kiel in Germany, whose team tracks ocean oxygen levels worldwide. “We were surprised by the intensity of the changes we saw, how rapidly oxygen is going down in the ocean and how large the effects on marine ecosystems are,” he says.
https://www.scientificamerican.com/article/the-ocean-is-running-out-of-breath-scientists-warn/?utm_source=newsletter&utm_medium=email&utm_campaign=weekly-review&utm_content=link&utm_term=2019-02-27_featured-this-week&spMailingID=58597866&spUserID=Mzg1NDE5MjQyNDEyS0&spJobID=1583431364&spReportId=MTU4MzQzMTM2NAS2
Which is the best answer to Sep-2012 ASI lost (compared to 1979-2000)?
50% [NSIDC Extent] or
73% [PIOMAS Volume]

Volume is harder to measure than extent, but 3-dimensional space is real, 2D's hide ~50% thickness gone.
-> IPCC/NSIDC trends [based on extent] underestimate the real speed of ASI lost.