4 ms·
Florida Current is weaker now than at any point in the past century
- throwaway1777 6y agoIs this implication of this that the gulf stream will weaken and Northern Europe will cool?
- dumbfoundded 6y agoI don't think there's enough information to make that conclusion. The strongest conclusion I think we can make is that ocean current's changing is almost certainly going to change regional climates in unexpected ways.
- haunter 6y agoJust a theory there is not enough information https://en.wikipedia.org/wiki/Shutdown_of_thermohaline_circulation https://en.wikipedia.org/wiki/Shutdown_of_thermohaline_circu...
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- catmistake 6y agoNot for the Snowball Earth-deniers. But for everyone else, Mexican real estate is cheap... for now.
- ACAVJW4H 6y agoThere is a nice video explaining the AMOC (Atlantic Meridional Overturning Circulation) by Just Have a Think https://www.youtube.com/watch?v=6Yz8nZbZPE8 https://www.youtube.com/watch?v=6Yz8nZbZPE8
- NotSammyHagar 6y agoWow, incredibly informative video. That was actually worth 10 minutes to watch!
- qserasera 6y agoPlease read the original paper to look at the data otherwise there is not much to discuss https://www.nature.com/articles/s41467-020-17761-w https://www.nature.com/articles/s41467-020-17761-w
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- joecool1029 6y agoThanks for the link, the thing I wanted to know and this paper answered was how they measured the current and this was the cool part! They used voltage induction caused by salt water flowing past abandoned submarine telephone cables. [1] [1]https://journals.ametsoc.org/jtech/article/31/5/1169/262 https://journals.ametsoc.org/jtech/article/31/5/1169/262
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- supernova87a 6y agoWould be really interesting to have a qualitative description of where global ocean flows are increasing, if they are decreasing here? Or if in general, ocean circulation / transport is undergoing some change? Or watching the video commented below, maybe it's the weakening that's happening because of the warming and freshening of arctic waters like around Greenland.
- sulam 6y agoThere isn't a "conservation of flow" principle for liquids, so there's no need to go looking for a flow increase somewhere else because this flow is decreasing.
- ethbro 6y agoMy takeaway from a one year oceanography course is that ocean currents have more in common with biology than computing: they're complex, can change as the result of propagation of relatively small changes, and are inconceivable in scale.
- sradman 6y agoFrom the conclusions: > I applied Bayesian data analysis to observations from submarine cables and tide gauges to infer the changes in the Florida Current transport at 27°N during 1909–2018. These are important techniques for deriving a proxy for missing historical flow data. I have no confidence that the algorithms model a real-world trend but it seems to have promise as one component of a decent future model.
- jcun4128 6y agoI did open the article/Ctrl + F for submarine cables(where did that come from?) But was curious what can you tell from those cables? Aren't they inaccessible? Is it a strain thing or do they somehow have positioning?
- sradman 6y agoI followed qserasera's link to the Nature paper. The Methods [1] section says: > I also use Florida Current transport from submarine telephone cables at 27∘N between West Palm Beach and Grand Bahama (Figs. 1b and 2). Using electromagnetic theory, one can estimate changes in the flow from voltages induced across the cable due to the transport of charged particles by the variable current. [1] https://www.nature.com/articles/s41467-020-17761-w#Sec8 https://www.nature.com/articles/s41467-020-17761-w#Sec8
- jcun4128 6y agoWhat... wow. I was thinking maybe resistance (fiber?) or something but wow. Anyway thanks for that, very interesting.
- williesleg 6y agoThat's because there's too much oxygen in the air, need more co2. All caused by the China flu.