Ian Walsh
@oceanian.bsky.social
Carbon flux oceanographer, BGC Argo cheerleader, mCDR consulting, ocean optical instrument design and calibration. Know your instruments!
Soybean diesel is a real thing, and probably pencils out much better than corn to ethanol
October 10, 2025 at 3:38 PM
Soybean diesel is a real thing, and probably pencils out much better than corn to ethanol
pick up some manganese nodules next time y'all are down there, you should get plenty of interesting sequences, though the transformation into todorokites probably wipes out some of the 'evidence'
September 25, 2025 at 5:21 PM
pick up some manganese nodules next time y'all are down there, you should get plenty of interesting sequences, though the transformation into todorokites probably wipes out some of the 'evidence'
Ah, great idea (we have lots of rinds)
September 19, 2025 at 3:56 PM
Ah, great idea (we have lots of rinds)
Beans and rice for breakfast is common for breakfast in Nicaragua. Beans are really easy to grow too, and gives me an excuse to shuck and watch tv.
September 19, 2025 at 3:54 PM
Beans and rice for breakfast is common for breakfast in Nicaragua. Beans are really easy to grow too, and gives me an excuse to shuck and watch tv.
Check out the history of UK coal mining unions for some good lockouts (and the US too).
August 21, 2025 at 8:13 PM
Check out the history of UK coal mining unions for some good lockouts (and the US too).
I'm not a great fan of that particular lede, and if it went away i doubt it would change much of anything, but I'm not sure why you think it is 'false.' Is the statement "some oxygen in the atmosphere comes from photosynthesis in the ocean" not false?
August 1, 2025 at 11:58 PM
I'm not a great fan of that particular lede, and if it went away i doubt it would change much of anything, but I'm not sure why you think it is 'false.' Is the statement "some oxygen in the atmosphere comes from photosynthesis in the ocean" not false?
That thread discussed the current equilibrium and doesn't address [02]atmo at all in terms of origin! [02]atmo is a function of net photosynthesis and (mostly) sedimentation. It took a long time to accumulate 02 in the atmosphere (had to get rid of a lot of reduced Fe, and sequester a lot of C.
August 1, 2025 at 11:44 PM
That thread discussed the current equilibrium and doesn't address [02]atmo at all in terms of origin! [02]atmo is a function of net photosynthesis and (mostly) sedimentation. It took a long time to accumulate 02 in the atmosphere (had to get rid of a lot of reduced Fe, and sequester a lot of C.
But what exactly is 'false'? Are you asserting that [02]atmo is not of marine origin at all, or much less than 50%? I'm assuming you are talking about oxygen and not argon and nitrogen (i have no idea of where denitrification is predominant)
August 1, 2025 at 11:14 PM
But what exactly is 'false'? Are you asserting that [02]atmo is not of marine origin at all, or much less than 50%? I'm assuming you are talking about oxygen and not argon and nitrogen (i have no idea of where denitrification is predominant)
This is a very confusing thread, as your assertion of "false" isn't specific nor is the Conversation article specific, so it is hard to get a handle on just what is right or wrong. Are you asserting that [O2atmo] doesn't have a marine origin, or that it isn't 50%? Or something else?
August 1, 2025 at 10:44 PM
This is a very confusing thread, as your assertion of "false" isn't specific nor is the Conversation article specific, so it is hard to get a handle on just what is right or wrong. Are you asserting that [O2atmo] doesn't have a marine origin, or that it isn't 50%? Or something else?
Well then, I’m curious what nurse shark heads are like
July 7, 2025 at 11:27 PM
Well then, I’m curious what nurse shark heads are like
cool, wasn't disagreeing (or i didn't think i was!). burning coal mobilizes lots of heavy metals (uranium too)
June 17, 2025 at 6:36 PM
cool, wasn't disagreeing (or i didn't think i was!). burning coal mobilizes lots of heavy metals (uranium too)
whoa, that seems far too apropos.
June 17, 2025 at 5:28 PM
whoa, that seems far too apropos.
mercury input is pretty widespread (via the atmosphere), and methylation occurs in sub oxic environments which in the ocean includes marine aggregates within the surface water. Human activity has increased the loading, but mercury bioaccumulation is 'natural'. eg: www.frontiersin.org/journals/env...
www.frontiersin.org
June 17, 2025 at 5:09 PM
mercury input is pretty widespread (via the atmosphere), and methylation occurs in sub oxic environments which in the ocean includes marine aggregates within the surface water. Human activity has increased the loading, but mercury bioaccumulation is 'natural'. eg: www.frontiersin.org/journals/env...
I worry about wide areas of the gyres getting warmer and more stratified pushing the nutricline (and pro and syn) down below the ‘enough light to grow’ depth. Marine heatwaves that don’t dissipate. That will be bad.
June 17, 2025 at 5:00 AM
I worry about wide areas of the gyres getting warmer and more stratified pushing the nutricline (and pro and syn) down below the ‘enough light to grow’ depth. Marine heatwaves that don’t dissipate. That will be bad.
Please add me, 9 pm Pacific, Thursday (though I don’t post much at the moment)
June 6, 2025 at 6:04 PM
Please add me, 9 pm Pacific, Thursday (though I don’t post much at the moment)
If you do you’ll win a pickle
June 1, 2025 at 10:39 PM
If you do you’ll win a pickle
I'll be talking tommorrow night @ 9 pm pacific: Wading into the Ocean (of Data): Biogeochemical Floats and NSF's Ocean Observatories Initiative 🌊
May 28, 2025 at 9:15 PM
I'll be talking tommorrow night @ 9 pm pacific: Wading into the Ocean (of Data): Biogeochemical Floats and NSF's Ocean Observatories Initiative 🌊
At some point all these actions against university budgets are going to impact football
May 21, 2025 at 10:49 PM
At some point all these actions against university budgets are going to impact football
First guess is an intrusive sill, assuming you mean the horizontal lines, not the verticals which mark rock fall chutes.
May 13, 2025 at 2:50 PM
First guess is an intrusive sill, assuming you mean the horizontal lines, not the verticals which mark rock fall chutes.
Absolutely must have levels,
And Relics,
And Relics,
May 10, 2025 at 4:09 AM
Absolutely must have levels,
And Relics,
And Relics,
One major exception is the oceanography division (OCE) where infrastructure costs are high and operational budgets consume a large fraction of the top line budget (i.e. for the Ocean Observatories oceanobservatories.org and the ships www.unols.org)
The Ocean Observatories Initiative (OOI)
The Ocean Observatories Initiative (OOI) is a science-driven ocean observing network that delivers real-time data from more than 900 instruments to address critical science questions regarding the wor...
oceanobservatories.org
May 9, 2025 at 3:34 PM
One major exception is the oceanography division (OCE) where infrastructure costs are high and operational budgets consume a large fraction of the top line budget (i.e. for the Ocean Observatories oceanobservatories.org and the ships www.unols.org)