Widespread Ocean Anoxia to be Noticeable by 2030

[kassy]

It is not a science paper but it asks some questions. See my comments here
https://forum.arctic-sea-ice.net/index.php/topic,2305.msg342409.html#new

Starts from reply 764 page 16.

[Paladiea]

Yeah I was just about to post my apologies about that last link.

[Paladiea]

Gulf of Maine phytoplankton productivity down 65%

[vox_mundi]

Researchers Discover Expanding and Intensifying Low-Oxygen Zone In the Arabian Gulf
https://phys.org/news/2022-09-low-oxygen-zone-arabian-gulf.html



A team of researchers from the Arabian Center for Climate and Environmental Sciences (ACCESS) at NYU Abu Dhabi (NYUAD) studied the evolution of dissolved oxygen in the Arabian Gulf over three decades and discovered a significant decline in oxygen concentrations and the expansion of the seasonal near-bottom hypoxic zone (lower oxygen levels near the bottom of the Gulf in certain seasons). The researchers conclude that changes in local climate are altering the Gulf's physical and biogeochemical environment with potential implications for the ecosystems and the fisheries of the region.

In the paper titled "Recent expansion and intensification of hypoxia in the Arabian Gulf and its drivers" published in the journal Frontiers in Marine Science, the researchers used a sophisticated ocean model to simulate hypoxia near the sea bottom, from 1982 to 2010. The results indicated an expansion and intensification of hypoxia in the central Gulf, accompanied by a lengthening of the hypoxic season.

... The expansion and intensification of hypoxia in the Gulf has the potential to alter its biogeochemistry and marine ecosystems in various ways. Hypoxia can cause fish mortality, lead to a loss of marine biodiversity, and may also cause distribution shifts as fish migrate to avoid hypoxic stress. This can alter the community structure of reef ecosystems and increase the vulnerability of the Gulf coral reefs to ongoing warming and climate change.

"Oxygen is an essential molecule, vital for the survival of the marine organisms and fish populations in the area. Our team found that the seasonal hypoxic zone in the Arabian Gulf has grown by over 50 percent since the 1980s, and it is now persisting for several more months each year compared with several decades ago," said lead author Zouhair Lachkar, a senior research scientist at ACCESS.



Zouhair Lachkar et al, Recent expansion and intensification of hypoxia in the Arabian Gulf and its drivers, Frontiers in Marine Science (2022)
https://www.frontiersin.org/articles/10.3389/fmars.2022.891378/full

[Paladiea]

University of Princeton's projections about the growth of the Pacific oxygen minimum zone.

https://www.princeton.edu/news/2023/01/06/pacific-oceans-oxygen-starved-omz-growing-new-princeton-research-finds

Article from Yale documenting low oxygen content on fish.

https://e360.yale.edu/features/as-ocean-oxygen-levels-dip-fish-face-an-uncertain-future

Evidence that deep ocean oxygen is declining.

https://phys.org/news/2023-05-earth-deep-ocean-oxygen-declining.html

[Paladiea]

The plankton are dead!" Doomer reddit keeps dredging up..
https://twitter.com/wang_seaver/status/1548750630914703362

@Paladiea #Paladiea

I clicked the link and it came up with nothing. What exactly am I being pointed to?

[Richard Rathbone]

The plankton are dead!" Doomer reddit keeps dredging up..
https://twitter.com/wang_seaver/status/1548750630914703362

@Paladiea #Paladiea

I clicked the link and it came up with nothing. What exactly am I being pointed to?

Links to Twitter are now all broken unless you are already logged into Twitter when you follow them. Musk is paywalling Twitter but he's working out the details in real time so at the moment it just looks broken rather than telling you that you need to subscribe.

[Paladiea]

Links to Twitter are now all broken unless you are already logged into Twitter when you follow them. Musk is paywalling Twitter but he's working out the details in real time so at the moment it just looks broken rather than telling you that you need to subscribe.

Ah. Well I've never really been on Twitter and I don't really intend to start, can I get a summary?

[oren]

Whoever posts a link to an external source without bothering to quote the relevant part, runs the risk of the link being broken later.

[Paladiea]

[THIS IS A PRE-PRINT, WILL SEE IF PAPER IS ACTUALLY ACCEPTED]

https://bg.copernicus.org/preprints/bg-2023-72/

"Underestimation of global O2 loss in optimally interpolated historical ocean observations"

Paper claims that losses are around 1.7-3.1% over the last 50 years instead of 1.5%.

[Paladiea]

So with the news that the AMOC might be on the verge of collapse, does that mean that the oceans would also stagnate?

[Paladiea]

https://www.nature.com/articles/s41586-023-05762-w

"Abyssal ocean overturning slowdown and warming driven by Antarctic meltwater"

Evidence of slowdown in abyssal ocean overturn.