Dr Femke de Jong 🌊

@LeonSimons8 It has been investigated and proven wrong

@LeonSimons8 journals.ametsoc.org/view/journals/…

Quite a shame that so many are spreading misinformation about the effects of global shipping sulphur emission reductions: "That too can only explain a few hundredths [of a degree C]" It's likely the main cause of accelerating ocean warming. rtl.nl/nieuws/buitenl… @fmkdejong

@DominikFahrner Congrats on the new position 🎉

Now at fmkdejong.bsky.social. Will probably take a while to get up to steam

That was fast! Many thanks 😁

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.

@oceanografer Great story. Thanks for sharing

Big Birthday Bash is the most significant time of the year for me. In Chapter 2, I pour my heart out and share the origin story of Gothenburg-Oslo and why it was the single biggest thing for me to accomplish in the last ten years. egonomics.blog/2023/08/20/big…

@np_holliday Congratulations 🎉

@Ollie__Tooth @David_Smeed @RAPID_AMOC @Foukalpoint @ShaneKahn @MsadekRym @JonIRobson @BenMoat1 @mpc_ocean @SabOceano @CristinaArumi97 Where does that leave us? (2) - #GulfStream transport is large, and contributes to gyres and overturning. - #AMOC is smaller, but dominates heat transport. Review from Jackson et al. (2022) on AMOC since 1980 shorturl.at/dnFY6

@Ollie__Tooth @David_Smeed @RAPID_AMOC @Foukalpoint @ShaneKahn @MsadekRym @JonIRobson @BenMoat1 Where does that leave us? (1) - #GulfStream spans Florida to Boston. - #AMOC spans South Africa to Arctic. Southern AMOC review (no Gulf Stream needed) from Chidichimo et al. (2023) shorturl.at/kyFNQ @mpc_ocean

@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 (shorturl.at/wADKV)

@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 (shorturl.at/cOUV0)

@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 (shorturl.at/dfvR0)

@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 shorturl.at/ehLR6

@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 (shorturl.at/giw78)

‘Era of global boiling has arrived,’ says UN chief as July set to be hottest month on record theguardian.com/science/2023/j…

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 nrc.nl/nieuws/2023/07…