AMOC shows two-decade decline across four deep-ocean monitoring sites
Posted by Portalrules123@reddit | collapse | View on Reddit | 4 comments
Posted by Portalrules123@reddit | collapse | View on Reddit | 4 comments
Strange_Sleep_406@reddit
these effects are irreversible & we're all just passengers on this train headed for the cliffs. atmospheric chemistry is now irreversible changed & will reach a new equilibrium so in the meantime make sure you're adapting as much as possible
ShyElf@reddit
They're using the pressure data instead of the current sensors, so this is a mostly independent measurement from the usually reported AMOC values. Except for the array at 26.5N, they're mostly seeing the western boundary current, and not the eastern boundary current.
The data is very clean, probably due to not picking up most of the wind forced movement.
One massive anomaly is that they have the western boundary overturning current at 16.5N trend down nearly 2/3 over just 23 years. It's a clean trend, too. The 26.5N data has a smaller but still huge trend, with mostly cancelled by increased flow in the eastern boundary current, making the 16.5N data look like a real effect. I'd think that might start to have significant regional effects, even if the AMOC total doesn't move much.
Their most recent data is more than 3 years old. That's unlikely to be the fault of the authors of the most recent article, but c'mon guys. We just had a paper showing a major shift of the Gulf Stream on a 10-year timescale. We really should have data at least a little more current.
StatementBot@reddit
The following submission statement was provided by /u/Portalrules123:
SS: Related to the science behind ocean and climate collapse as this new study adds more evidence to the hypothesis that the AMOC has been slowing down for decades now, possibly indicating a future collapse. This study is important because it utilizes direct data from deep sea monitoring sites rather then mainly using computer models, which in my opinion are often too conservative due to either unintentional or intentional bias. You’ll notice that some studies that have suggested the AMOC isn’t declining do in fact use computational models. Anyways, these researchers used metrics like deep sea pressure to show a consistent decline in the AMOC across four deep sea monitoring sites in the western Atlantic. Regular r/collapse users likely know the consequences if the AMOC were to fully collapse, but for the new people: potential effects include a boost in sea level rise in the western Atlantic, a catastrophic shift in rainfall patterns drying out the Sahel and the Amazon even further, and a steep reduction in the ocean’s ability to sequester heat and carbon. Expect the AMOC to continue declining frighteningly fast on a geologic time scale as climate collapse continues.
Please reply to OP's comment here: https://old.reddit.com/r/collapse/comments/1sqjbrg/amoc_shows_twodecade_decline_across_four/oh84vxt/
Portalrules123@reddit (OP)
SS: Related to the science behind ocean and climate collapse as this new study adds more evidence to the hypothesis that the AMOC has been slowing down for decades now, possibly indicating a future collapse. This study is important because it utilizes direct data from deep sea monitoring sites rather then mainly using computer models, which in my opinion are often too conservative due to either unintentional or intentional bias. You’ll notice that some studies that have suggested the AMOC isn’t declining do in fact use computational models. Anyways, these researchers used metrics like deep sea pressure to show a consistent decline in the AMOC across four deep sea monitoring sites in the western Atlantic. Regular r/collapse users likely know the consequences if the AMOC were to fully collapse, but for the new people: potential effects include a boost in sea level rise in the western Atlantic, a catastrophic shift in rainfall patterns drying out the Sahel and the Amazon even further, and a steep reduction in the ocean’s ability to sequester heat and carbon. Expect the AMOC to continue declining frighteningly fast on a geologic time scale as climate collapse continues.