Professor Aquatic Geochemistry / @unihh / @CENunihh / Try Carbon Dioxide Removal

Universität Hamburg
Joined March 2017
About 12 seconds into this video, something unusual happens. The Earth begins to rise. Never seen by humans before, the rise of the Earth over the limb of the Moon occurred about 55.5 years ago and surprised and amazed the crew of Apollo 8. The crew immediately scrambled to take still images of the stunning vista caused by Apollo 8's orbit around the Moon. The featured video is a modern reconstruction of the event as it would have looked were it recorded with a modern movie camera. The colorful orb of our Earth stood out as a familiar icon rising above a distant and unfamiliar moonscape, the whole scene the conceptual reverse of a more familiar moonrise as seen from Earth. To many, the scene also spoke about the unity of humanity: that big blue marble -- that's us -- we all live there. The two-minute video is not time-lapse -- this is the real speed of the Earth rising through the windows of Apollo 8. Seven months and three missions later, Apollo 11 astronauts would not only circle Earth's moon, but land on it. Lead Animator: Ernie Wright; (USRA); Music: C Major Prelude by Johann Sebastian Bach
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Jens Hartmann retweeted
Last day of our joint General Assembly in Hanover: All CDRterra consortia presented the latest interim results of their #research on land-based #CDR. Some examples you can find here: 👉🏾linkedin.com/company/8668476… Many thanks to all of u!💚 #CarbonDioxideRemoval #CarbonRemoval
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Jens Hartmann retweeted
Exciting keynotes about #CDR from exciting people were the focus of the 1. day of our general assembly with @CDRmare in Hanover. Today, our climate scientists will be answering questions from the public at our #CCS Infoevent at 7.30 pm: cdrterra.de/en/news/ccs-oppo… @BMBF_Bund @DLR_PT
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Jens Hartmann retweeted
A kick-off session with lots of expert input and many topics to discuss afterward. Thanks a lot to everyone who joined us last night in Hanover to start the joint general assembly of CDRmare and @CDRterra #CDR
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A sample screenshot of our soil pCO2 sensor data from the recently added new experiments in the #projectcarbdown greenhouse. The purple lines/areas show the CO2 concentrations of the untreated control (=top left graph), the gray line/areas show the readings for the pots with rock dust amendments during the first 7 days since inception of the experiment. Irrigation was started on day 3. There is already a significant difference in CO2 in the amended pots compared to the control even during the first days of the experiment, which will continue to run for 1-3 years. Some pots (bottom left 2, with very reactive amendments) have seen CO2 concentrations below 100 ppm right after setup and for several days. The sensors take a measurement every minute which equals 10.080 data points per week per replica. These graphs cover 7 variants with up to 7 replicas, so what you see here is based on over 400.000 data points in one week.
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Last week we have extended our greenhouse experiment with 78 new lysimeters to now close to 400 experiments in total. This brings our setup now to a total of 14 different rock dusts and 15 different soils. Visit our blog to see the full documentary carbon-drawdown.de/blog/2024…
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Three years ago today we announced the start of #projectcarbdown where we try to measure the carbondioxide removal from the atmosphere by enhanced weathering on agriculturally used lands. We want to see "tons of CO2 captured&stored per hectare per year"!
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Jens Hartmann retweeted
A new preprint manuscript on the stability of alkalinity after ocean alkalinity enhancement (OAE) is online from Niels Suitner et al. Thanks @GiulyFau and all the others: egusphere.copernicus.org/pre…
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Jens Hartmann retweeted
I finally published my first paper. If you are planning some EW field experiments and want to know which soil parameters are important to measure for EW application, the discussion and conclusion section will give you some insights. frontiersin.org/articles/10.…
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Jens Hartmann retweeted
September temperatures are now out from our Berkeley Earth dataset. Looking at all the Septembers back to 1850 helps highlight just how anomalous this month has been: berkeleyearth.org/september-…
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Jens Hartmann retweeted
Is ocean alkalinity enhancement #OAE a reliable & sustainable #CDR option? #RETAKE researchers @CDRmare met in Hamburg this week to exchange and discuss the results of experiments, field studies & modelling. The potential is huge, but further research is needed. @BMBF_bund
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Jens Hartmann retweeted
We keep underestimating learning curves for clean energy. Costs for wind and solar have plummeted from 2010 to 2022. 📉Solar PV: -89% 📉Onshore wind: -69% 📉Offshore wind: -59% New data from @IRENA
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Jens Hartmann retweeted
New study: experimental observation that enhanced weathering may reduce drought stress in crops. And plants did not accumulate heavy metals. @RijndersJet @jonasschoelynck @ArthurVienne @EricStruyf1 @GeoHartmann @GCE_UAntwerp @WeatherinWizard frontiersin.org/articles/10.…
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It's official now! I'm honored to be funded by the @ktstiftung to lead my very own research project 𝑅𝒪𝒞𝒦𝒞𝐻𝒜𝑅 where I combine biomass and mineral waste to draw down CO₂ from the atmosphere. Is "mineral-doping" the key for climate mitigation? We will see. @geoengineering1
𝗠𝗲𝗲𝘁 𝘁𝗵𝗲 𝗻𝗲𝘄 𝗞𝗹𝗮𝘂𝘀 𝗧𝘀𝗰𝗵𝗶𝗿𝗮 𝗕𝗼𝗼𝘀𝘁 𝗙𝘂𝗻𝗱 𝗙𝗲𝗹𝗹𝗼𝘄𝘀 Here they are: Our 𝟭𝟲 𝗻𝗲𝘄 𝗙𝗲𝗹𝗹𝗼𝘄𝘀 with backgrounds in #ComputerScience, #Physics, #Biology, #Neurosciences & #EarthSciences. ➡️ Learn more about them:lnkd.in/e-xZrt64
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1/5 🧩 At #ProjectCarbdown our mission is to understand & measure Enhanced Rock Weathering (ERW) as a method for Carbon Dioxide Removal (CDR). It's like assembling a puzzle with some pieces missing. Here, we're proposing a concept of "scopes" for MRV! carbon-drawdown.de/blog/2023…
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3 years ago we co-founded @NEP_Brussels Negative Emissions Platform in Brussels with just 2 co-founders. For the new German organization Deutscher Verband für negative Emissionen e.V. (DVNE) there were 31 founding members present with us at the inaugural meeting yesterday! X10 in 3 years, this is the speed we need to save the climate! – at Fürth, Germany
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Jens Hartmann retweeted
You may have seen this, but I bet all your followers haven’t yet. They should.
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Jens Hartmann retweeted
I’m going to sell carbon credits for conferences in far away places that I *could* attend but don’t. I will seek Verra approval.
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Jens Hartmann retweeted
The topic of #CO2removal is more urgent than ever. With our research, we are creating the knowledge base on which a sensible mix of #CDR methods can be developed for 🇩🇪: scientists from 38 research institutions at the 2nd CDRterra General Assembly cdrterra.de/en/news/half-tim…
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