Mostly stopped posting here, but still looking for a good alternative. Mastodon isn’t quite it. If anyone has an invite code to the blue place I’d like to give it a try. DM me
Deliberate tracer release experiments (TREs) are needed for MRV of ocean CO₂ removal (CDR). We need to develop the expertise.
If you are a Ph.D. student or recent Ph.D. and interested in joining a cruise to the Labrador Sea in Nov/Dec 2023 to assist with a TRE, please email me.
@Ollie__Tooth @David_Smeed @RAPID_AMOC@Foukalpoint Major difference #2: Heat transport
At 26°N, the #gyre moves little heat. ~0.2 PW (0.2 x 10^15 watts).
The #AMOC transports almost all the heat (1.2 PW), even though it only claims a fraction of the #GulfStream.
Johns et al. 2011 (https://t.co/UrLqoWiojc)
@Ollie__Tooth @David_Smeed @RAPID_AMOC@Foukalpoint What about the #AMOC?
No simple theory explains its existence! In fact doesn’t *need* to exist at all (cf. the Pacific, or an AMOC ‘shut down’ state).
And we can’t write down an equation that describes the flow.
Talley et al 2010 (https://t.co/WcdqGkSIRg)
@Ollie__Tooth @David_Smeed @RAPID_AMOC@Foukalpoint Major difference #1: #GulfStream v #AMOC
The gyres are nicely described by theory. We can write an equation for them.
As long as the wind blows and the earth rotates, a gyre will exist. A #GulfStream is essentially unavoidable.
Image from Stommel 1948 (https://t.co/RQnbE8W4w5)
@Ollie__Tooth @David_Smeed @RAPID_AMOC@Foukalpoint Where is the #GulfStream in all this?
It’s part of both the horizontal and vertical circulations!
It contains the western boundary current of the gyre and the northward limb of the #AMOC in the northern subtropics.
Image from IPCC FAQ 9.3 https://t.co/UqHTHzHlr5
@Ollie__Tooth @David_Smeed @RAPID_AMOC The overturning goes up and down.
It’s a vertical circulation (seen in the yz-plane), and described in a integrative sense (across x-dir) where the net effect is to ‘tip’ the waters over (= overturning).
Only found in the Atlantic. (Ok, the A in #AMOC gives it away.)
In the Atlantic Ocean, there are two main large-scale circulations: the gyres and the overturning.
#Gyres go round-and-round.
They are a ‘horizontal’ circulation (xy-plane) and are found in multiple oceans.
What’s the difference between the #GulfStream and the #AMOC?
Isn’t it just ‘you say potato, I say potahto’?
A 🧵
Image from NASA 2009 (https://t.co/SR25T4MSVq)
Vandaag voorin de krant:Volgens Deense onderzoekers komt de machtige oceaanstroming in de Noord-Atlantische Oceaan, die het klimaat over een groot deel van de wereld regelt, mogelijk al binnen enkele decennia abrupt tot stilstand. @NIOZnieuws@fmkdejong https://t.co/H72kdmF2XK