Malin Ödalen
@malinodalen.bsky.social
Researcher @pik-potsdam.bsky.social , modelling ocean’s role in climate system 🌬🌊🌎☀️👩💻📚
Palaeo/present/future, physics/bgc
From the Arctic, studying both poles ❄️
Check out @iapso-ecs.bsky.social http://iapsoecs.org
Views my own. she/her
Palaeo/present/future, physics/bgc
From the Arctic, studying both poles ❄️
Check out @iapso-ecs.bsky.social http://iapsoecs.org
Views my own. she/her
Pinned
Malin Ödalen
@malinodalen.bsky.social
· Nov 13
Past foraminiferal acclimatization capacity is limited during future warming - Nature
Data from the fossil record, together with computational modelling, are used to assess the response of foraminifera (marine zooplankton) to temperature changes through time and to predict how well the...
www.nature.com
📄🧪🌊 New paper alert! 🔔
“Past foraminiferal acclimatization capacity is limited during future warming”
led by Rui Ying
Co-authors: Fanny M. Monteiro, Jamie Wilson, myself and Daniela N. Schmidt.
Neither of them are here yet, so I need you all to cheer with me!
www.nature.com/articles/s41...
“Past foraminiferal acclimatization capacity is limited during future warming”
led by Rui Ying
Co-authors: Fanny M. Monteiro, Jamie Wilson, myself and Daniela N. Schmidt.
Neither of them are here yet, so I need you all to cheer with me!
www.nature.com/articles/s41...
Reposted by Malin Ödalen
Go get that PhD! 📢
PhD Opportunity! 🚨
Working with Dr Pauline Tedesco on "Submesoscale ocean flows and processes in the Southern Ocean."
NERC GW4+ DTP PhD studentship for September 2026.
DEADLINE: 8th Jan 2026
Find out more - www.exeter.ac.uk/study/fundin...
🌊🌐🌍🦑🧪 #PhDsky #AcademicSky
Working with Dr Pauline Tedesco on "Submesoscale ocean flows and processes in the Southern Ocean."
NERC GW4+ DTP PhD studentship for September 2026.
DEADLINE: 8th Jan 2026
Find out more - www.exeter.ac.uk/study/fundin...
🌊🌐🌍🦑🧪 #PhDsky #AcademicSky
November 26, 2025 at 1:29 PM
Go get that PhD! 📢
Reposted by Malin Ödalen
A GEOMAR study has revealed that heat accumulated in the ocean may be released once more from the depths of the Southern Ocean, following centuries of atmospheric cooling after the reversal of anthropogenic global warming — possibly as a large “heat burp”— and warm the atmosphere once more.
Southern Ocean’s Heat Storage – a Possible Cause of Future ‘Heat Burps’
20 November 2025 / Kiel. So far, the ocean has helped to buffer global warming by absorbing more than 90 per cent of the excess heat trapped in the Earth system by the anthropogenic greenhouse effect....
www.geomar.de
November 20, 2025 at 1:11 PM
A GEOMAR study has revealed that heat accumulated in the ocean may be released once more from the depths of the Southern Ocean, following centuries of atmospheric cooling after the reversal of anthropogenic global warming — possibly as a large “heat burp”— and warm the atmosphere once more.
Reposted by Malin Ödalen
I love how being a librarian means I'm learning new things *all* the time. I've got a PhD in oceanography, but this morning I was answering a reference question & learned about ocean spiciness & how seawater can be "spicy" or "minty." 😍 TY to the person who asked about velocities of deep currents. 🌊
November 20, 2025 at 9:48 PM
I love how being a librarian means I'm learning new things *all* the time. I've got a PhD in oceanography, but this morning I was answering a reference question & learned about ocean spiciness & how seawater can be "spicy" or "minty." 😍 TY to the person who asked about velocities of deep currents. 🌊
Reposted by Malin Ödalen
The warmest water on the entire planet is sitting ~160E in the Equatorial Pacific & a prolonged Westerly Wind Burst event is about to occur here
This will trigger a downwelling oceanic kelvin wave that should destroy La Niña ~3 months from now & begin moving the ocean towards El Niño conditions
This will trigger a downwelling oceanic kelvin wave that should destroy La Niña ~3 months from now & begin moving the ocean towards El Niño conditions
November 19, 2025 at 12:59 PM
The warmest water on the entire planet is sitting ~160E in the Equatorial Pacific & a prolonged Westerly Wind Burst event is about to occur here
This will trigger a downwelling oceanic kelvin wave that should destroy La Niña ~3 months from now & begin moving the ocean towards El Niño conditions
This will trigger a downwelling oceanic kelvin wave that should destroy La Niña ~3 months from now & begin moving the ocean towards El Niño conditions
Reposted by Malin Ödalen
Press conference room absolutely packed at #COP30 as 20+ ministers gather to call for a roadmap away from fossil fuels to be a key outcome of this summit
(Many more countries have expressed their support behind the scenes)
(Many more countries have expressed their support behind the scenes)
November 18, 2025 at 5:16 PM
Press conference room absolutely packed at #COP30 as 20+ ministers gather to call for a roadmap away from fossil fuels to be a key outcome of this summit
(Many more countries have expressed their support behind the scenes)
(Many more countries have expressed their support behind the scenes)
Happy LGBTQIA+ in STEM Day and happy Polar Pride!
🌈🏳️⚧️🧑🔬🌊⛴️🧊💻 🛰️
🌈🏳️⚧️🧑🔬🌊⛴️🧊💻 🛰️
Happy Polar Pride Day! 🏳️🌈🏳️⚧️
Today is a special day in the international polar science and operations community when we celebrate the contributions of our LGBTQ+ colleagues.
Polar science is the ultimate teamwork environment - and making sure everyone feels included and welcome is crucial.
Today is a special day in the international polar science and operations community when we celebrate the contributions of our LGBTQ+ colleagues.
Polar science is the ultimate teamwork environment - and making sure everyone feels included and welcome is crucial.
November 18, 2025 at 8:40 PM
Happy LGBTQIA+ in STEM Day and happy Polar Pride!
🌈🏳️⚧️🧑🔬🌊⛴️🧊💻 🛰️
🌈🏳️⚧️🧑🔬🌊⛴️🧊💻 🛰️
Reposted by Malin Ödalen
Happy International Day of LGBTQIA+ People In STEM! 🧪⚒️
November 18, 2025 at 4:56 PM
Happy International Day of LGBTQIA+ People In STEM! 🧪⚒️
Reposted by Malin Ödalen
🚨Out today, acidification of the California Current🚨
Using corals and models we show regionally amplified acidification, due to the combo of CO2 uptake and remineralisation. This highlights potential risks to productive upwelling zones in an acidifying ocean 🌊🧪⚒️📈
www.nature.com/articles/s41...
Using corals and models we show regionally amplified acidification, due to the combo of CO2 uptake and remineralisation. This highlights potential risks to productive upwelling zones in an acidifying ocean 🌊🧪⚒️📈
www.nature.com/articles/s41...
November 13, 2025 at 10:16 AM
🚨Out today, acidification of the California Current🚨
Using corals and models we show regionally amplified acidification, due to the combo of CO2 uptake and remineralisation. This highlights potential risks to productive upwelling zones in an acidifying ocean 🌊🧪⚒️📈
www.nature.com/articles/s41...
Using corals and models we show regionally amplified acidification, due to the combo of CO2 uptake and remineralisation. This highlights potential risks to productive upwelling zones in an acidifying ocean 🌊🧪⚒️📈
www.nature.com/articles/s41...
Reposted by Malin Ödalen
📢Global Carbon Budget 2025📢
Fossil CO2 emissions continue to rise in 2025 while the terrestrial carbon sink recovers to pre-El Niño strength.
The key findings are covered in two reports this year:
* ESSDD (preprint): essd.copernicus.org/preprints/es...
* Nature: www.nature.com/articles/s41...
1/
Fossil CO2 emissions continue to rise in 2025 while the terrestrial carbon sink recovers to pre-El Niño strength.
The key findings are covered in two reports this year:
* ESSDD (preprint): essd.copernicus.org/preprints/es...
* Nature: www.nature.com/articles/s41...
1/
November 13, 2025 at 7:07 AM
📢Global Carbon Budget 2025📢
Fossil CO2 emissions continue to rise in 2025 while the terrestrial carbon sink recovers to pre-El Niño strength.
The key findings are covered in two reports this year:
* ESSDD (preprint): essd.copernicus.org/preprints/es...
* Nature: www.nature.com/articles/s41...
1/
Fossil CO2 emissions continue to rise in 2025 while the terrestrial carbon sink recovers to pre-El Niño strength.
The key findings are covered in two reports this year:
* ESSDD (preprint): essd.copernicus.org/preprints/es...
* Nature: www.nature.com/articles/s41...
1/
was trying all day to come up with something worth posting for the first time here and couldn’t make a decision, so why not kick it off with a self-made meme instead? made this on Monday after my Ocean Modelling lecture 🤠🌊
November 13, 2025 at 2:28 PM
Reposted by Malin Ödalen
It’s been a while since I shared these, so here we go!
If you are new to BlueSky, here are a few 🌊 ocean starter packs 🌊 to help you find who to follow:
Physical oceanography
go.bsky.app/Eb6xX19
Polar oceans
go.bsky.app/851nQgx
Organisations
go.bsky.app/U1Ei6XY
If you are new to BlueSky, here are a few 🌊 ocean starter packs 🌊 to help you find who to follow:
Physical oceanography
go.bsky.app/Eb6xX19
Polar oceans
go.bsky.app/851nQgx
Organisations
go.bsky.app/U1Ei6XY
November 9, 2025 at 12:35 PM
It’s been a while since I shared these, so here we go!
If you are new to BlueSky, here are a few 🌊 ocean starter packs 🌊 to help you find who to follow:
Physical oceanography
go.bsky.app/Eb6xX19
Polar oceans
go.bsky.app/851nQgx
Organisations
go.bsky.app/U1Ei6XY
If you are new to BlueSky, here are a few 🌊 ocean starter packs 🌊 to help you find who to follow:
Physical oceanography
go.bsky.app/Eb6xX19
Polar oceans
go.bsky.app/851nQgx
Organisations
go.bsky.app/U1Ei6XY
Reposted by Malin Ödalen
Happy to see this out! Meltwater can delay future surface warming, and its interannual variations impact ocean stratification & overturning. This effect is usually absent from models.
Including it as forcing may lead to more realistic simulation of surface temperature and sea ice trends🧊🌊 (1/7)
Including it as forcing may lead to more realistic simulation of surface temperature and sea ice trends🧊🌊 (1/7)
Finally out! The outcome of a virtual workshop in Feb 2024 with modelers and observationalists to put together data and protocols to include historical changes in ice sheet/ice shelf discharge in CMIP models. Hopefully not too late for some CMIP7 runs!
gmd.copernicus.org/articles/18/...
gmd.copernicus.org/articles/18/...
Datasets and protocols for including anomalous freshwater from melting ice sheets in climate simulations
Abstract. Anomalous freshwater fluxes from the Greenland and Antarctic ice sheets and ice shelves are impacting the surrounding oceans, and we need to be able to account for these effects in climate m...
gmd.copernicus.org
November 8, 2025 at 3:52 PM
Happy to see this out! Meltwater can delay future surface warming, and its interannual variations impact ocean stratification & overturning. This effect is usually absent from models.
Including it as forcing may lead to more realistic simulation of surface temperature and sea ice trends🧊🌊 (1/7)
Including it as forcing may lead to more realistic simulation of surface temperature and sea ice trends🧊🌊 (1/7)
Reposted by Malin Ödalen
Are you attending #EGU26 and remember how overwhelming your first conference felt? Why not apply to the Peer Support Programme and help first-time attendees feel supported?
👉 More information about the programme: egu.eu/3YUO9G
📆 Register by 31 March 2026.
👉 More information about the programme: egu.eu/3YUO9G
📆 Register by 31 March 2026.
November 9, 2025 at 1:11 PM
Are you attending #EGU26 and remember how overwhelming your first conference felt? Why not apply to the Peer Support Programme and help first-time attendees feel supported?
👉 More information about the programme: egu.eu/3YUO9G
📆 Register by 31 March 2026.
👉 More information about the programme: egu.eu/3YUO9G
📆 Register by 31 March 2026.
It’s been a while since I shared these, so here we go!
If you are new to BlueSky, here are a few 🌊 ocean starter packs 🌊 to help you find who to follow:
Physical oceanography
go.bsky.app/Eb6xX19
Polar oceans
go.bsky.app/851nQgx
Organisations
go.bsky.app/U1Ei6XY
If you are new to BlueSky, here are a few 🌊 ocean starter packs 🌊 to help you find who to follow:
Physical oceanography
go.bsky.app/Eb6xX19
Polar oceans
go.bsky.app/851nQgx
Organisations
go.bsky.app/U1Ei6XY
November 9, 2025 at 12:35 PM
It’s been a while since I shared these, so here we go!
If you are new to BlueSky, here are a few 🌊 ocean starter packs 🌊 to help you find who to follow:
Physical oceanography
go.bsky.app/Eb6xX19
Polar oceans
go.bsky.app/851nQgx
Organisations
go.bsky.app/U1Ei6XY
If you are new to BlueSky, here are a few 🌊 ocean starter packs 🌊 to help you find who to follow:
Physical oceanography
go.bsky.app/Eb6xX19
Polar oceans
go.bsky.app/851nQgx
Organisations
go.bsky.app/U1Ei6XY
Reposted by Malin Ödalen
New paper on scientific challenges raised by early-career ocean professionals (ECOPs)
Identifying and addressing the challenges of early-career ocean professionals during the MSEAS conference
Identifying and addressing the challenges of early-career ocean professionals during the MSEAS conference
Abstract. In recent years, there has been a growing international effort to address the challenges related to the sustainable use of the ocean. To this end
academic.oup.com
November 2, 2025 at 6:32 PM
New paper on scientific challenges raised by early-career ocean professionals (ECOPs)
Reposted by Malin Ödalen
Extended hurricane category scale, following Wehner&Kossin, Proceedings of the National Academy 2024: www.pnas.org/doi/abs/10.1...
If that scale didn't stop at Category 5 for historic reasons, we would have had several Category 6 tropical cyclones since year 2000.
If that scale didn't stop at Category 5 for historic reasons, we would have had several Category 6 tropical cyclones since year 2000.
November 2, 2025 at 4:56 PM
Extended hurricane category scale, following Wehner&Kossin, Proceedings of the National Academy 2024: www.pnas.org/doi/abs/10.1...
If that scale didn't stop at Category 5 for historic reasons, we would have had several Category 6 tropical cyclones since year 2000.
If that scale didn't stop at Category 5 for historic reasons, we would have had several Category 6 tropical cyclones since year 2000.
Reposted by Malin Ödalen
Quote to remember:
“Trees fall naturally in the forest, and chainsaws are not a hoax.”
“Trees fall naturally in the forest, and chainsaws are not a hoax.”
Was Hurricane Melissa Super Hurricane? Is Category 6 needed? I took a deep dive in my weekend Forbes piece citing
@katharinehayhoe.com @michaelemann.bsky.social @bmcnoldy.bsky.social @weatherprof.bsky.social Rheeda walker
Let me know your thoughts after reading it
www.forbes.com/sites/marsha...
@katharinehayhoe.com @michaelemann.bsky.social @bmcnoldy.bsky.social @weatherprof.bsky.social Rheeda walker
Let me know your thoughts after reading it
www.forbes.com/sites/marsha...
Revisiting The Category 6 Conversation After Hurricane Melissa
Hurricane Melissa may be the strongest hurricane to make landfall in the Atlantic basin. It has also ignited discussion about the need for a Category 6 designation.
www.forbes.com
November 2, 2025 at 12:37 PM
Quote to remember:
“Trees fall naturally in the forest, and chainsaws are not a hoax.”
“Trees fall naturally in the forest, and chainsaws are not a hoax.”
When emissions stop, and the world starts to cool, what happens to the heat the ocean has accumulated?
Well, let’s say the ocean had a bit too much of a mouthful before, and didn’t have the time to chew properly before swallowing its deep waters 🌊
Well, let’s say the ocean had a bit too much of a mouthful before, and didn’t have the time to chew properly before swallowing its deep waters 🌊
Our new study emphasizes the potential importance of the Southern Ocean under ambitious emission mitigation:
agupubs.onlinelibrary.wiley.com/doi/10.1029/..., with an EOS spotlight: eos.org/research-spo....
agupubs.onlinelibrary.wiley.com/doi/10.1029/..., with an EOS spotlight: eos.org/research-spo....
Southern Ocean Heat Burp in a Cooling World
Under net-negative CO2 emissions and global cooling ocean heat release causes substantial centennial scale atmospheric warming The ocean heat release originates from Southern Ocean deep convectio...
agupubs.onlinelibrary.wiley.com
November 2, 2025 at 10:07 AM
When emissions stop, and the world starts to cool, what happens to the heat the ocean has accumulated?
Well, let’s say the ocean had a bit too much of a mouthful before, and didn’t have the time to chew properly before swallowing its deep waters 🌊
Well, let’s say the ocean had a bit too much of a mouthful before, and didn’t have the time to chew properly before swallowing its deep waters 🌊
Reposted by Malin Ödalen
🧊 New research reveals an overlooked Antarctic process that may skew sea level rise projections.
☀️ A team led by Dr @fabiobdias.bsky.social (ACEAS/UNSW) found East Antarctica ice shelves melt in summer bursts as sea ice retreats and warm water flows underneath.
🔗 antarctic.org.au/overlooked-m...
☀️ A team led by Dr @fabiobdias.bsky.social (ACEAS/UNSW) found East Antarctica ice shelves melt in summer bursts as sea ice retreats and warm water flows underneath.
🔗 antarctic.org.au/overlooked-m...
Overlooked melting in East Antarctica could skew sea level rise projections - ACEAS
New research into how East Antarctica’s ice shelves melt reveals future global sea-level rise predictions could be significantly underestimated.
antarctic.org.au
October 30, 2025 at 4:03 AM
🧊 New research reveals an overlooked Antarctic process that may skew sea level rise projections.
☀️ A team led by Dr @fabiobdias.bsky.social (ACEAS/UNSW) found East Antarctica ice shelves melt in summer bursts as sea ice retreats and warm water flows underneath.
🔗 antarctic.org.au/overlooked-m...
☀️ A team led by Dr @fabiobdias.bsky.social (ACEAS/UNSW) found East Antarctica ice shelves melt in summer bursts as sea ice retreats and warm water flows underneath.
🔗 antarctic.org.au/overlooked-m...
Reposted by Malin Ödalen
🌊 Ocean warming threatens the viability of 60% of Antarctic ice shelves
If global temps stay <2 °C, nearly all 64 ice shelves survive by 2300. But above ~4.5 °C, ocean melt causes 38 shelves to collapse by 2300, risking up to 10 m sea level rise.
www.nature.com/articles/s41...
If global temps stay <2 °C, nearly all 64 ice shelves survive by 2300. But above ~4.5 °C, ocean melt causes 38 shelves to collapse by 2300, risking up to 10 m sea level rise.
www.nature.com/articles/s41...
Ocean warming threatens the viability of 60% of Antarctic ice shelves - Nature
The viability of Antarctic ice shelves under low rates and high rates of global warming is modelled to estimate when it will become unfeasible for the ice shelves to maintain their present-day shape.
www.nature.com
October 31, 2025 at 7:03 AM
🌊 Ocean warming threatens the viability of 60% of Antarctic ice shelves
If global temps stay <2 °C, nearly all 64 ice shelves survive by 2300. But above ~4.5 °C, ocean melt causes 38 shelves to collapse by 2300, risking up to 10 m sea level rise.
www.nature.com/articles/s41...
If global temps stay <2 °C, nearly all 64 ice shelves survive by 2300. But above ~4.5 °C, ocean melt causes 38 shelves to collapse by 2300, risking up to 10 m sea level rise.
www.nature.com/articles/s41...
Reposted by Malin Ödalen
Your science is sound
Your press release says “Reef recovery”
The internet hears “Crisis over”
A study shows how well-intended optimism can fuel climate misinformation.
Context matters...
www.nature.com/articles/s44...
Your press release says “Reef recovery”
The internet hears “Crisis over”
A study shows how well-intended optimism can fuel climate misinformation.
Context matters...
www.nature.com/articles/s44...
Steering Great Barrier Reef climate science narratives through the mediasphere in a time of misinformation - npj Climate Action
npj Climate Action - Steering Great Barrier Reef climate science narratives through the mediasphere in a time of misinformation
www.nature.com
October 31, 2025 at 1:45 PM
Your science is sound
Your press release says “Reef recovery”
The internet hears “Crisis over”
A study shows how well-intended optimism can fuel climate misinformation.
Context matters...
www.nature.com/articles/s44...
Your press release says “Reef recovery”
The internet hears “Crisis over”
A study shows how well-intended optimism can fuel climate misinformation.
Context matters...
www.nature.com/articles/s44...
Reposted by Malin Ödalen
TLDR; The PSF has made the decision to put our community and our shared diversity, equity, and inclusion values ahead of seeking $1.5M in new revenue. Please read and share. pyfound.blogspot.com/2025/10/NSF-...
🧵
🧵
The official home of the Python Programming Language
www.python.org
October 27, 2025 at 2:47 PM
TLDR; The PSF has made the decision to put our community and our shared diversity, equity, and inclusion values ahead of seeking $1.5M in new revenue. Please read and share. pyfound.blogspot.com/2025/10/NSF-...
🧵
🧵
My new colleagues at PIK have worked really hard on this updated assessment. It does not bring great news, but important ones!
New from my colleagues and me at PIK: ocean acidification has now crossed it's planetary boundary 🌊 the rest of the planet isn't doing so well, either...
www.theguardian.com/environment/...
www.theguardian.com/environment/...
World’s oceans fail key health check as acidity crosses critical threshold for marine life
Scientists call for renewed global effort to curb fossil fuels as seven of nine planetary boundaries now transgressed
www.theguardian.com
September 25, 2025 at 8:25 PM
My new colleagues at PIK have worked really hard on this updated assessment. It does not bring great news, but important ones!
Reposted by Malin Ödalen
A study in Nature Climate Change shows that the ocean carbon sink unexpectedly declined in 2023 despite record-high sea surface temperatures (SSTs), primarily due to SST-driven outgassing of CO2 in the subtropics. 🌊 🧪
Unexpected decline in the ocean carbon sink under record-high sea surface temperatures in 2023 - Nature Climate Change
The ocean carbon sink strengthened in previous warm El Niño years due to reduced CO2 outgassing in the tropics. Here the authors show that the ocean carbon sink declined in 2023 despite record-high sea surface temperatures (SSTs), primarily due to SST-driven outgassing of CO2 in the subtropics.
go.nature.com
September 25, 2025 at 1:52 AM
A study in Nature Climate Change shows that the ocean carbon sink unexpectedly declined in 2023 despite record-high sea surface temperatures (SSTs), primarily due to SST-driven outgassing of CO2 in the subtropics. 🌊 🧪
Reposted by Malin Ödalen
So this is a cool climate change website that's big on positive developments. Basically a review site for evaluating high/low tech things that might help reduce #ClimateChange. And there are a lot of them that seem pretty good ... plus some shady 🌊 ones I've worked on that get a deserved kicking.
Drawdown® Explorer
We know what we need to do: stop climate change as quickly as possible. Now, with the Drawdown Explorer, we know how to do it.
drawdown.org
September 25, 2025 at 3:33 PM
So this is a cool climate change website that's big on positive developments. Basically a review site for evaluating high/low tech things that might help reduce #ClimateChange. And there are a lot of them that seem pretty good ... plus some shady 🌊 ones I've worked on that get a deserved kicking.