Judith Hauck
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jhauck.bsky.social
Judith Hauck
@jhauck.bsky.social
2.3K followers 650 following 220 posts
Professor of polar biogeochemical modelling at University of Bremen and ocean carbon cycle scientist / marine biogeochemical modeller at the Alfred Wegener Institute for Polar and Marine Research, Germany. Views are my own.
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Reposted by Judith Hauck
trackow.bsky.social
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)
November 8, 2025 at 3:52 PM
Reposted by Judith Hauck
gwagner.com
Great dissection of where the world stands on climate 10 years after Paris: better than ever; worse than needed.

Start here: www.nytimes.com/interactive/...

But lemme quibble a bit with the CO₂ₑ emissions pathways painted here.

A quick 🧵
10 Years After a Breakthrough Climate Pact, Here’s Where We Are
November 7, 2025 at 8:23 PM
Reposted by Judith Hauck
altagliabue.bsky.social
Seeking a three year postdoc in the field of ocean biogeochemistry and productivity using mechanistic models and synthesis of observations. Note the short fuse for applications. Please help distribute. All nationalities welcome to apply! 🌊

www.jobs.ac.uk/job/DPG117/p...
Postdoctoral Research Associate at University of Liverpool
Looking for a new job opportunity in academia? Check out this job opening for a Postdoctoral Research Associate on jobs.ac.uk!
www.jobs.ac.uk
October 29, 2025 at 5:38 PM
jhauck.bsky.social
🌊
jhauck.bsky.social Judith Hauck @jhauck.bsky.social · 19d
Very happy to see this paper from the #OceanNETs project out:

--> net primary production can locally be reduced by 15% in regions of ocean alkalinity enhancement due to indirect effects.

1/2
miriamseif.bsky.social Miriam Seifert @miriamseif.bsky.social · 19d
🌊 New paper out today: Assessing the interaction between ocean alkalinity enhancement 🚢 and phytoplankton🦠 in an Earth System Model 🌐
#mCDR #OAE #ESM
bg.copernicus.org/articles/22/...
October 22, 2025 at 9:23 PM
Reposted by Judith Hauck
miriamseif.bsky.social
We are - to our knowledge for the first time - not only assessing the potential efficiency of OAE using a global model, but also potential effects on phytoplankton and how phytoplankton can affect OAE efficiency.
Exiting results - enjoy reading 😊
@jhauck.bsky.social
October 22, 2025 at 3:06 PM
jhauck.bsky.social
Very happy to see this paper from the #OceanNETs project out:

--> net primary production can locally be reduced by 15% in regions of ocean alkalinity enhancement due to indirect effects.

1/2
October 22, 2025 at 9:22 PM
Reposted by Judith Hauck
guypeer.bsky.social
Open Letter by scientists to the Council:
"Climate Neutrality Is Europe’s Greatest Economic Opportunity”.
Ahead of the European Council meeting on 23.10.2025,
2,178 scientists urge EU Heads of States & Governments to take ambitious decisions for the 2040 targets.
zenodo.org/records/1739...
October 20, 2025 at 4:23 PM
Reposted by Judith Hauck
sabinebischof.bsky.social
🌊 Open position W2-Professorship (with tenure track) in Physical Oceanography @geomarkiel.bsky.social in Kiel, Germany.
Application deadline: 5th of November 2025

Please find more information here:
www.geomar.de/en/karriere/...
W 2-Professorship (with tenure track to W 2) in Physical Oceanography
www.geomar.de
September 29, 2025 at 12:47 PM
Reposted by Judith Hauck
socatco2.bsky.social
Frauke Bunsen, Cara Nissen and Judith Hauck assess the impacts of climate change on the global ocean carbon sink

doi.org/10.1029/2023...

#ocean #carbon
Figure 3: (a) The mean air-sea CO₂ flux density and (b) trend in the CO₂ flux density 1958–2019 in the historical simulation (simulation A) (c–f) The effects of the rising atmospheric CO₂ concentration and climate change on the trend in the CO₂ flux density obtained as the difference between two simulations with and without interannual variability and trends in the respective variable(s): (c) Atmospheric CO₂ concentration, (d) full climate variability and trends, (e) winds and (f) global warming. Positive values denote a trend toward more oceanic outgassing or less oceanic uptake, respectively. Hatched areas in (b–f) indicate a low significance of the trend (p-value > 0.05 applying a two-sided Wald Test with t-distribution).
September 18, 2025 at 1:39 PM
Reposted by Judith Hauck
sulpis.bsky.social
🌟 Postdoc Opportunity in Marine Biogeochemistry at CNRS-CEREGE!

🚢 Are you a passionate researcher ready to tackle climate change? Dive into the ERC-funded Deep-C project in Aix-en-Provence, France!

⬇️
September 29, 2025 at 10:01 AM
Reposted by Judith Hauck
oceancarbon.bsky.social
In the Department of Earth and Environmental Sciences @columbiauniversity.bsky.social, we are hiring an Assistant Professor in Atmosphere and/or Ocean Physics. No deadline stated, but review will begin soon, so please do not delay. apply.interfolio.com/173819
September 16, 2025 at 5:46 PM
jhauck.bsky.social
So nice to see #Polarstern pCO₂ data from the @awi.de MOSAiC expedition being used to provide better quantifications of Arctic Ocean CO₂ uptake. 🌊
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
September 4, 2025 at 3:00 PM
Reposted by Judith Hauck
jens-d-mueller.bsky.social
🌊 In 2023, the ocean carbon sink weakened for the first time in a record-hot year 🌡️🌎
Our new study in Nature Climate Change quantifies this unexpected decline and explains how it came about. 👇
doi.org/10.1038/s415...
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 se...
doi.org
September 2, 2025 at 11:59 AM
Reposted by Judith Hauck
voosen.me
My latest: Polar scientists warn that the White House and NSF are planning to terminate the Nathaniel Palmer, the only US research icebreaker capable of handling Antarctic extremes, this October.

So far the plan has seen minimal pushback from Congress.
NSF plans abrupt end to lone U.S. Antarctic research icebreaker
Imminent termination of the RV Nathaniel B. Palmer shocks polar scientists
www.science.org
July 28, 2025 at 8:23 PM
Reposted by Judith Hauck
carlosmoffat.com
🌊❄️🧪 🇦🇶 Please share:

We have learned that the National Science Foundation is moving ahead with plans to decommission the U.S. Research Vessel/Ice Breaker Nathaniel B. Palmer this October.

If you care about Antarctic research, please read on (1/n)
July 25, 2025 at 7:50 PM
Reposted by Judith Hauck
davidho.bsky.social
They want to close the NOAA lab (GML) that brings you this, the most iconic time series in the environmental sciences.

gml.noaa.gov/ccgg/trends/
A scientific line graph titled “Atmospheric CO₂ at Mauna Loa Observatory.” The graph displays the atmospheric carbon dioxide (CO₂) mole fraction measured in parts per million (ppm) from the year 1958 to 2025. The x-axis represents the year, ranging from 1958 to just past 2020. The y-axis represents CO₂ mole fraction in ppm, ranging from 310 to 430. The data is represented by a jagged red and black line that shows both seasonal fluctuations and a long-term upward trend. Key observations: CO₂ mole fraction starts at around 315 ppm in 1958. The graph shows a steady upward trajectory, with seasonal oscillations (up and down) superimposed on the trend. By 2025, the CO₂ level exceeds 420 ppm. Credit is given to: Scripps Institution of Oceanography NOAA Global Monitoring Laboratory Logos for Scripps Institution of Oceanography and NOAA appear in the bottom right corner. The date "2025-June-05" is printed vertically on the far right edge of the image.
June 30, 2025 at 6:44 PM
Reposted by Judith Hauck
roobaertalizee.bsky.social
🌊 Still not familiar with #SOCOM2? 5 key experiments tackling biases in ocean CO₂ reconstructions by addressing data gaps, changing networks & mapping methods. Possible session at #OSM2026!

climate.esa.int/en/supportin...

@oc4c.bsky.social @vliz.be @jhauck.bsky.social @oceancarbon.bsky.social
June 25, 2025 at 2:13 PM
Reposted by Judith Hauck
jaimepalter.bsky.social
AI has greatly accelerated my transition from Matlab to Python. But 3 experiences *this week* have alerted me to the potential for mistakes and brain rot when getting too reliant. First, I used it to help me write code to compute lagged correlations between two variables. 🌊🧵1/4
June 21, 2025 at 10:29 PM
Reposted by Judith Hauck
oceanandice.bsky.social
📢 New paper alert! 📢

New insight into how sea ice controls the ocean uptake of carbon dioxide around Antarctica, obtained from the unique year-round Rothera Time Series.

Delighted to be part of this study, led by the very excellent Elise Droste.

🧪❄️🥼🌊

www.nature.com/articles/s43...
Sea ice controls net ocean uptake of carbon dioxide by regulating wintertime stratification - Communications Earth & Environment
Interannual variability of ocean uptake of carbon dioxide is governed by winter sea ice cover, according to analysis of carbonate chemistry observations along the West Antarctic Peninsula.
www.nature.com
June 18, 2025 at 12:14 PM
Reposted by Judith Hauck
beatekraft.bsky.social
Two Postdoc Opportunities in Environmental Microbiology!

Join us and work on microbial key players exposed to oxygen depletion.

Please share widely!
Deadline: 25 July

More information can be found here:
tinyurl.com/4kwzzt6p
Two postdoc positions on the ecology and physiology of microbial key players exposed to oxygen depletion
Application deadline: 25 July 2025 at 23:59 hours local Danish time
tinyurl.com
June 16, 2025 at 8:02 PM
Reposted by Judith Hauck
europarl.europa.eu
On this day 40 years ago, the Schengen agreement was signed, paving the way for free movement across Europe without internal checks.

Today, 3.5 million Europeans from 29 countries are travelling, working, and moving freely across Europe on a daily basis.

🔗Learn more: europa.eu/!6QwJvb
June 14, 2025 at 5:38 PM
Reposted by Judith Hauck
gunnarmy.bsky.social
Happy to share our paper in ‪@science.org‬ 'Observed trend in Earth energy imbalance may provide a constraint for low climate sensitivity models' | Science www.science.org/doi/10.1126/...
Observed trend in Earth energy imbalance may provide a constraint for low climate sensitivity models
Climate forcings by greenhouse gases and aerosols cause an imbalance at the top of the atmosphere between the net incoming solar radiation and outgoing longwave radiation from Earth. This Earth energy...
www.science.org
June 12, 2025 at 6:15 PM
Reposted by Judith Hauck
uaf-oarc-alaska.bsky.social
Liqing Jiang led a new synthesis project for ocean carbonate chemistry data sets which is now in review. 🧪🌊🦑🌐 Check out the preprint! 👇

doi.org/10.5194/essd...
Synthesis of data products for ocean carbonate chemistry
Abstract. As the largest active carbon reservoir on Earth, the ocean is a cornerstone of the global carbon cycle, playing a pivotal role in modulating ocean health and regulating climate. Understandin...
doi.org
June 11, 2025 at 7:28 PM
Reposted by Judith Hauck
davidho.bsky.social
After working at it for a while, I finally convinced @clequere.bsky.social to join Bluesky. Many of you know her, but if not, she’s an extraordinary scientist whose impact on climate science and society is hard to measure.

Please give her a follow.

research-portal.uea.ac.uk/en/persons/c...
A selfie featuring two people seated in a venue. The man has short black hair and glasses, while the woman has medium-length hair, glasses, and is wearing a light blue dress with a colorful necklace. There are empty chairs in the background.
June 5, 2025 at 1:32 PM
Reposted by Judith Hauck
socatco2.bsky.social
SOCAT v2025 is released today! A grand total of 49.6 million surface ocean fCO2 observations from dozens of contributors around the world.

www.socat.info/v2025

#ocean #co2
Map showing the surface ocean CO₂ from ships, drifters and autonomous surface platforms and moorings for all data in SOCAT version 2025, coloured by fCO2 concentration (scale not shown).
June 5, 2025 at 9:29 AM