@jhauck.bsky.social
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.
Zur Veröffentlichung des IOC-R Berichtes der
@unesco.bsky.social: die wichtigsten 🧪Forschungsfragen im 🌊marinen Kohlenstoffkreislauf.
www.awi.de/ueber-uns/se...
@awi.de i.de
🌊
🌊
If you're interested in ocean carbonate chemistry, check out this new paper 🌊 A comprehensive overview of 68 existing ocean carbonate chemistry data products and datasets including cruise data compilations, gap-filled products, model simulations, ..
Please share!
essd.copernicus.org/articles/18/...
@carolrobinson8.bsky.social releasing the IOC-R report on key knowledge gaps and research strategies for 🌊ocean carbon at #OSM26.
www.ioc.unesco.org/en/articles/...
@jhauck.bsky.social is a biogeochemical modeler at @awi.de and a Professor at University of Bremen. Her research focuses on understanding the drivers that influence the ocean's ability to take up atmospheric CO₂, including during marine CO₂ removal (mCDR) deployments.
#RECCAP2 paper alert, Jemma Wadham led the polar chapter, summarizing knowns and (large) unknowns of carbon stocks and fluxes from ice sheets to land fringes, fjords, 🌊 oceans and sediments.🧪 Excellent reference starting point for future work.
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
@awi.de
Prof. Dr Hajo Eicken is the new director of the Alfred Wegener Institute! Born in Bremerhaven, the glaciologist will relocate from Alaska to take up his position as scientific director on 20 March. 🎉⚓
www.awi.de/en/about-us/...
@helmholtz.de
📸: University of Alaska Fairbanks
*DEADLINE EXTENDED* February 8
Submit your suggestions and nominate (yourself or others) as a co-author for the 2026 edition of the 10 New Insights in Climate Science
@fcstpauli.com stabil.
🌊 an opportunity to suggest endangered data, I would think
🌊 Paper led by the Norwegian team in #OceanNETs showing largely additive effects of marine and terrestrial #CDR approaches
shorturl.at/F0dqf
@miriamseif.bsky.social
A comparison between alkalinity in the ocean and in soils, led by Jelle Bijma, motivated by enhanced weathering as a carbon dioxide removal method.
🌊
bg.copernicus.org/articles/23/...
We can essentially predict 🌊ocean CO2 uptake and atm CO2 reduction based on amount of alkalinity added (R2 > 0.98). Of course, some processes are missing in all models, and this will be very different for the first 1-2 decades of the simulation as we illustrate with the large ensemble spread.
6/end
Do you think there is a lot of spread between 🌊 models when simulating alkalinity enhancement?
After decade long simulations, there is astonishingly little spread between models, irrespective of their choice of scenario and regional deployment mask.
5/x
- The scenario sensitivity has previously been underestimated in ocean-only or concentration-driven simulations. The reduction in atmospheric CO2 due to OAE is weaker from the 2060s onwards in SSP1-2.6, that is after peak atmospheric CO2 (compared to a high-emission scenario).
4/x
- The feedbacks in the ESM make that efficiencies are smaller than in ocean-only or concentration-driven simulations and lead to high uncertainties in the first one or two decades. That will be a real challenge for monitoring.
3/x
- OAE in subduction regions is not significantly less efficient than evenly spread OAE over the globe. How much carbon exactly is transferred to the deep ocean varies strongly between ensemble members that experience somewhat different climate states
2/x
🌊 New ocean alkalinity enhancement paper out, led by @tanvi05.bsky.social:
We conducted global and regional (subduction regions) alkalinity enhancement simulations in the emission-driven AWI-ESM.
Key findings are ...
shorturl.at/9Cz5r @miriamseif.bsky.social @awi.de @cdrmare.bsky.social
1/x
(sorry for the self-promotion under your thread, Jens)
🌊 Related, from 2016 (iopscience.iop.org/article/10.1...):
"However, after equilibration with the atmosphere, the addition of 3 Pg olivine yr−1 is not compensating the effect of ocean acidification"
@davidho.bsky.social had a nice tweet about this, too.
Everyone, take a note of this, please.
Ocean alkalinity enhancement does hardly counter ocean acidification.
🌊 New paper out assessing the potential of Ocean Alkalinity Enhancement (OAE) to mitigate the impacts of ocean acidification on marine calcifiers
doi.org/10.1021/acs....
The Global Carbon Project has just published the most comprehensive Global Hydrogen Budget to date.
H2, although not a GHG, has an indirect Global Warming Potential 37 times more potent than CO2.
Carbon Brief:
www.carbonbrief.org/hydrogen-emi...
Research paper:
www.nature.com/articles/s41...
JOB ALERT!
@vliz.be is recruiting a Data Engineer to work in a wide-ranging role to help coordinate global SOCAT activities.
Full details: vliz.be/en/jobs/vliz...
Zur Veröffentlichung des Global Carbon Budget 2025 haben Julia Pongratz @lmumuenchen.bsky.social und ich die Ergebnisse in einem Pressebriefing des SMC vorgestellt und mit Jan Minx @pik-potsdam.bsky.social, Silvio Wenzel und den Journalisten diskutiert.
Danke für das Interesse und die Fragen!
🌊 oceanjobs
Published today in Earth System Science Data: The Global Carbon Budget 2025
essd.copernicus.org/preprints/es...
🚨 The Global Carbon Budget 2025 has just been released and I actively contributed for the first time 😍
1/2
We just published the Global Carbon Budget 2025, with a mix of bad news (CO2 emissions continue to grow) and encouraging news (35 countries saw emissions decline over the past decade while growing their economies).
Read the highlights in a short article:
theconversation.com/the-worlds-c...