Jens Hartmann
@GeoHartmann
Followers
254
Following
82
Media
8
Statuses
153
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
73
908
4K
@bach_lennart @jim_smoot @AbbyJiaying @IMASUTAS Here it is, I think only the abstract is available but the full text should come out in the coming days https://t.co/T0bebT7eQF
frontiersin.org
Ocean alkalinity enhancement (OAE) via the enhanced weathering of alkaline minerals is a promising carbon dioxide removal (CDR) technology. Theoretically, th...
1
2
3
2/2 "... As the techno- economic assessment identified no showstoppers, we argue for more research on ecosystem impacts, governance, monitoring, reporting, and verification, and technology development and assessment to determine whether ..."
0
0
3
1/2 NEW publication on OAE "Marine Carbon Dioxide Removal by alkalinization should no longer be overlooked" Link:
0
3
8
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: 👉🏾 https://t.co/4KQgEFO5CZ Many thanks to all of u!💚 #CarbonDioxideRemoval #CarbonRemoval
0
3
9
New #oae research out with the help of Kai Schulz, @tcyronak, @bach_lennart and Renaud Joannes-Boyau. Investigating grain size and seawater salinity effect for OAE! #OceanAlkAlign
Discussion open for comments on @EgUsphere: Effects of grain size and seawater salinity on magnesium hydroxide dissolution and secondary calcium carbonate precipitation kinetics: implications for ocean alkalinity enhancement
0
8
11
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: https://t.co/srBufrw5BG
@BMBF_Bund @DLR_PT
0
3
6
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
0
5
7
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 https://t.co/4jQsH3tJXK
1
3
9
Curious about our setup to enhance mineral weathering through the activity of soil organisms?🪱🍄🦠🪨Besides reading about it, now you can also... watch it!!! 📺 Have a look to find out more! 😁 #EIC_BAM #JoVE #enhancedweathering #soilbiota
https://t.co/F1RlAcbitC
2
10
27
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"!
Introducing “Project Carbdown”: Our first “enhanced weathering” field trial aims to remove CO₂ from the atmosphere 1/n #climatechange
https://t.co/qJLfuEvMhj
1
5
6
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:
0
7
8
Soil electrical conductivity as a proxy for enhanced weathering in soils https://t.co/JmNF61K1EI New publication by Lukas Rieder with help from the Carbon Drawdown Initiative @carbon_drawdown and @MathildeHagens
0
4
12
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. https://t.co/aqg39CfMrF
frontiersin.org
To effectively monitor and verify carbon dioxide removal through enhanced weathering (EW), this study investigates the use of soil electrical conductivity (E...
0
5
20
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:
0
7
8
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: https://t.co/lzh5i5m1Gm
87
438
866
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
1
11
32
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
29
188
497