Lennart Bach
@bachlennart.bsky.social
Applied Marine Biogeochemist, Global Citizen, Mate // Investigating consequences of, and solutions for, the climate crisis // Based at the University of Tasmania // https://appliedbgc.imas.utas.edu.au/
New episode of the marine biogeochemistry podcast is now online.
This time with Caroline Slomp talking about phosphorus cycling in sediments.
applied-marine-biogeochemistry.org/podcast/
or on spotify or apple podcasts.
This time with Caroline Slomp talking about phosphorus cycling in sediments.
applied-marine-biogeochemistry.org/podcast/
or on spotify or apple podcasts.
Podcast | Applied Marine Biogeochemistry Group
Marine biogeochemistry studies how elements like carbon and phosphorus move through the ocean. In this podcast, we explore the processes that drive this...
applied-marine-biogeochemistry.org
August 21, 2026 at 1:14 PM
New episode of the marine biogeochemistry podcast is now online.
This time with Caroline Slomp talking about phosphorus cycling in sediments.
applied-marine-biogeochemistry.org/podcast/
or on spotify or apple podcasts.
This time with Caroline Slomp talking about phosphorus cycling in sediments.
applied-marine-biogeochemistry.org/podcast/
or on spotify or apple podcasts.
Reposted by Lennart Bach
The process by which atmospheric CO₂ is taken up by the ocean is studied by only a handful of people worldwide. I talk about that important process in this podcast. 🌊
Carbon I - air-sea CO2 exchange - David Ho
Podcast Episode · Marine Biogeochemistry Podcast · August 6 · 37m
podcasts.apple.com
August 8, 2026 at 6:17 AM
The process by which atmospheric CO₂ is taken up by the ocean is studied by only a handful of people worldwide. I talk about that important process in this podcast. 🌊
I started a marine biogeochemistry podcast, where I ask scientists questions about the cycling of elements through the ocean.
This is a place where we can nerd it out, for scientists and marine science students.
Listen here, or spotify/apple podcasts
applied-marine-biogeochemistry.org/podcast/
This is a place where we can nerd it out, for scientists and marine science students.
Listen here, or spotify/apple podcasts
applied-marine-biogeochemistry.org/podcast/
Podcast | Applied Marine Biogeochemistry Group
Marine biogeochemistry studies how elements like carbon and phosphorus move through the ocean. In this podcast, we explore the processes that drive this...
applied-marine-biogeochemistry.org
July 31, 2026 at 8:56 PM
I started a marine biogeochemistry podcast, where I ask scientists questions about the cycling of elements through the ocean.
This is a place where we can nerd it out, for scientists and marine science students.
Listen here, or spotify/apple podcasts
applied-marine-biogeochemistry.org/podcast/
This is a place where we can nerd it out, for scientists and marine science students.
Listen here, or spotify/apple podcasts
applied-marine-biogeochemistry.org/podcast/
Reposted by Lennart Bach
A new cross-journal @natureportfolio.nature.com collection on carbon dioxide removal (#CDR) is now open for submissions until 16 January 2027.
Bringing together science on risks, opportunities, and accountability. Edited by Jay Fuhrman and me
go.nature.com/48dU6V8
#CDR #ClimateScience #mCDR 🌊
Bringing together science on risks, opportunities, and accountability. Edited by Jay Fuhrman and me
go.nature.com/48dU6V8
#CDR #ClimateScience #mCDR 🌊
Carbon Dioxide Removal
In this cross-journal collection, we showcase articles that help with understanding how carbon dioxide removal can contribute to climate change mitigation.
go.nature.com
May 8, 2026 at 8:50 AM
A new cross-journal @natureportfolio.nature.com collection on carbon dioxide removal (#CDR) is now open for submissions until 16 January 2027.
Bringing together science on risks, opportunities, and accountability. Edited by Jay Fuhrman and me
go.nature.com/48dU6V8
#CDR #ClimateScience #mCDR 🌊
Bringing together science on risks, opportunities, and accountability. Edited by Jay Fuhrman and me
go.nature.com/48dU6V8
#CDR #ClimateScience #mCDR 🌊
Reposted by Lennart Bach
‼️Check out our new paper led by Linn J. Hoffmann and @bachlennart.bsky.social on "Monitoring, reporting, and verification of marine carbon dioxide removal: exploring scientific consensus and divergences across continents".
#mCDR 🌊 @imev-mer.fr @iddri.bsky.social
online.ucpress.edu/elementa/art...
#mCDR 🌊 @imev-mer.fr @iddri.bsky.social
online.ucpress.edu/elementa/art...
Monitoring, reporting, and verification of marine carbon dioxide removal: Exploring scientific consensus and divergences across continents
Marine Carbon Dioxide Removal (mCDR) approaches are increasingly considered for climate change mitigation as a supplement to rapid emissions reduction. However, it is still unclear if mCDR approaches ...
online.ucpress.edu
May 4, 2026 at 8:07 AM
‼️Check out our new paper led by Linn J. Hoffmann and @bachlennart.bsky.social on "Monitoring, reporting, and verification of marine carbon dioxide removal: exploring scientific consensus and divergences across continents".
#mCDR 🌊 @imev-mer.fr @iddri.bsky.social
online.ucpress.edu/elementa/art...
#mCDR 🌊 @imev-mer.fr @iddri.bsky.social
online.ucpress.edu/elementa/art...
Reposted by Lennart Bach
Join us on April 20 for a discussion of recent developments in, and future directions for, mCDR governance under the London Convention and Protocol. Register at: buff.ly/3lFOtf9
April 2, 2026 at 11:35 PM
Join us on April 20 for a discussion of recent developments in, and future directions for, mCDR governance under the London Convention and Protocol. Register at: buff.ly/3lFOtf9
Reposted by Lennart Bach
I created an autonomous AI agent that acts as evangelist for Carbon Dioxide Removal -- in just one day using agentic AI and OpenClaw.
February 26, 2026 at 6:45 PM
I created an autonomous AI agent that acts as evangelist for Carbon Dioxide Removal -- in just one day using agentic AI and OpenClaw.
Reposted by Lennart Bach
New commentary on marine benthic carbon modeling and data synthesis 🌊 @usocb.bsky.social
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Elucidating the Role of Marine Benthic Carbon in a Changing World
New observations should prioritize easier-to-collect variables to rapidly increase temporal and spatial coverage of benthic data Multi-variable data sets need to be harmonized to provide comprehe...
agupubs.onlinelibrary.wiley.com
December 15, 2025 at 2:15 PM
New commentary on marine benthic carbon modeling and data synthesis 🌊 @usocb.bsky.social
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Reposted by Lennart Bach
New study by Dong et al. shows that #bubble-mediated #CO2 transfer favors invasion based on field evidence. They introduce an asymmetric #BulkFlux equation, suggesting that the global #ocean may absorb ~15% more #CO2 than previously estimated.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
December 4, 2025 at 8:47 AM
New study by Dong et al. shows that #bubble-mediated #CO2 transfer favors invasion based on field evidence. They introduce an asymmetric #BulkFlux equation, suggesting that the global #ocean may absorb ~15% more #CO2 than previously estimated.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by Lennart Bach
@agu.org New in #JGR a study on 🌊 Ocean Alkalinity Enhancement: higher alkalinity speeds up growth of key #coccolithophores, but at very high TA calcification falters & shells deform. Authors suggest TA <~3,000 μmol kg−1 as a safer ecosystem boundary. doi.org/10.1029/2025... #protistsonsky
The Physiological Response of Contrasting Coccolithophore Species to Ocean Alkalinity Enhancement
Increased alkalinity significantly boosts growth rates of coccolithophores Gephyrocapsa huxleyi and Coccolithus braarudii
Divergent responses between species arise as large C. braarudii rely on C...
doi.org
November 17, 2025 at 5:51 PM
@agu.org New in #JGR a study on 🌊 Ocean Alkalinity Enhancement: higher alkalinity speeds up growth of key #coccolithophores, but at very high TA calcification falters & shells deform. Authors suggest TA <~3,000 μmol kg−1 as a safer ecosystem boundary. doi.org/10.1029/2025... #protistsonsky
"Natural CO2 removal is increasingly being claimed as anthropogenic climate mitigation. This misrepresentation is already prevalent for forests and coastal ecosystems; there is now the risk of the error reoccurring for open-ocean CO2 uptake via the biological carbon pump."\
🌊
rdcu.be/eOooz
🌊
rdcu.be/eOooz
Natural carbon uptake by ocean biology will not deliver credible carbon credits
Nature Reviews Earth & Environment - Natural CO2 removal is increasingly being claimed as anthropogenic climate mitigation. This misrepresentation is already prevalent for forests and coastal...
rdcu.be
November 6, 2025 at 7:45 AM
"Natural CO2 removal is increasingly being claimed as anthropogenic climate mitigation. This misrepresentation is already prevalent for forests and coastal ecosystems; there is now the risk of the error reoccurring for open-ocean CO2 uptake via the biological carbon pump."\
🌊
rdcu.be/eOooz
🌊
rdcu.be/eOooz
A new guide on best practices for engaging coastal communities on ocean alkalinity enhancement by Sara Nawaz and Giulia Belotti.
🌊
edspace.american.edu/carbonremova...
🌊
edspace.american.edu/carbonremova...
edspace.american.edu
October 29, 2025 at 2:34 AM
A new guide on best practices for engaging coastal communities on ocean alkalinity enhancement by Sara Nawaz and Giulia Belotti.
🌊
edspace.american.edu/carbonremova...
🌊
edspace.american.edu/carbonremova...
Kind words by Mallory Ringham from Ebb Carbon about research informing the "Ocean Alkalinity Enhancement Pelagic Impact Intercomparison Project" #OAEPIIP.
🌊
Agreed, the key benefit of OAEPIIP is bringing the OAE research community together.
onlinelibrary.wiley.com/doi/full/10....
🌊
Agreed, the key benefit of OAEPIIP is bringing the OAE research community together.
onlinelibrary.wiley.com/doi/full/10....
October 27, 2025 at 12:45 AM
Kind words by Mallory Ringham from Ebb Carbon about research informing the "Ocean Alkalinity Enhancement Pelagic Impact Intercomparison Project" #OAEPIIP.
🌊
Agreed, the key benefit of OAEPIIP is bringing the OAE research community together.
onlinelibrary.wiley.com/doi/full/10....
🌊
Agreed, the key benefit of OAEPIIP is bringing the OAE research community together.
onlinelibrary.wiley.com/doi/full/10....
Reposted by Lennart Bach
Some of the climate benefits of forestry and revegetation projects are erased by the fact that they reduce the reflectivity of Earth's surface. 🧪
Accounting for albedo in carbon market protocols - Nature Communications
The paper analyzes the impact of omitting biophysical effects from carbon credits on climate mitigation. It shows that some Voluntary Carbon Market projects may result in net warming due to albedo whi...
www.nature.com
October 26, 2025 at 10:17 PM
Some of the climate benefits of forestry and revegetation projects are erased by the fact that they reduce the reflectivity of Earth's surface. 🧪
Reposted by Lennart Bach
Last week we hosted the 4th webinar in our GGR Insights series. In 'Making space for "place" in carbon removal: learning from the communities of St Ives Bay', we explored a marine CO2 removal trial in Cornwall & the community response to it. Watch the recording on YouTube: youtu.be/_MgoETf3-Sg?...
Making space for “place” in carbon removal: learning from the communities of St Ives Bay
This is a recording of the fourth webinar in the GGR Insights series, which presents the latest research and debates what is needed to enable the sustainable scale-up of greenhouse gas removal in the…
youtu.be
October 23, 2025 at 1:30 PM
Last week we hosted the 4th webinar in our GGR Insights series. In 'Making space for "place" in carbon removal: learning from the communities of St Ives Bay', we explored a marine CO2 removal trial in Cornwall & the community response to it. Watch the recording on YouTube: youtu.be/_MgoETf3-Sg?...
Reposted by Lennart Bach
🌊 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/...
#mCDR #OAE #ESM
bg.copernicus.org/articles/22/...
Interactions between ocean alkalinity enhancement and phytoplankton in an Earth system model
Abstract. The functioning and efficiency of ocean alkalinity enhancement (OAE) as a CO2 removal strategy is well investigated in model studies, but risks for the ecosystem are presently not considered...
bg.copernicus.org
October 22, 2025 at 3:06 PM
🌊 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/...
#mCDR #OAE #ESM
bg.copernicus.org/articles/22/...
Reposted by Lennart Bach
Hello! we have a new paper out today in @science.org reviewing Calcifying Plankton : from Biomineralization to Global change 🌊🧪🐚
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
Calcifying plankton: From biomineralization to global change
The cycling of calcium carbonate (CaCO3) in the ocean is closely linked to seawater alkalinity and the regulation of atmospheric CO2. In the modern pelagic ocean, almost all CaCO3 is produced by three...
www.science.org
October 23, 2025 at 8:29 PM
Hello! we have a new paper out today in @science.org reviewing Calcifying Plankton : from Biomineralization to Global change 🌊🧪🐚
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
Reposted by Lennart Bach
Happy #FieldworkFriday from our SUSTech students who are busy in Dapeng running large-scale incubations to look at the side-effects of Ocean Alkalinity Enhancement on marine ecosystems 🌊
October 17, 2025 at 2:49 AM
Happy #FieldworkFriday from our SUSTech students who are busy in Dapeng running large-scale incubations to look at the side-effects of Ocean Alkalinity Enhancement on marine ecosystems 🌊
Still looking for 1 more guest editor :-)
🌊
🌊
We are currently proposing a special issue in Biogeosciences to publish individual experiments of the "Ocean Alkalinity Enhancement Pelagic Impact Intercomparison Project #OAEPIIP".
Let me know if you are keen to serve as guest editors for the special issue ☺️
🌊
bg.copernicus.org/articles/21/...
Let me know if you are keen to serve as guest editors for the special issue ☺️
🌊
bg.copernicus.org/articles/21/...
Technical note: Ocean Alkalinity Enhancement Pelagic Impact Intercomparison Project (OAEPIIP)
Abstract. Ocean alkalinity enhancement (OAE) aims to transfer carbon dioxide (CO2) from the atmosphere to the ocean by increasing the capacity of seawater to store CO2. The potential effects of OAE-in...
bg.copernicus.org
October 17, 2025 at 2:27 AM
Still looking for 1 more guest editor :-)
🌊
🌊
It is good to see that a diverse set of stakeholders from Tasmania have a nuanced view on marine CO2 removal, specifically Ocean Alkalinity Enhancement.
This is encouraging and, indeed, important to follow their request and inform the public more.
🌊
www.nature.com/articles/s43...
This is encouraging and, indeed, important to follow their request and inform the public more.
🌊
www.nature.com/articles/s43...
Stakeholders have knowledge priorities beyond local impacts for responsible marine-based carbon dioxide removal in Tasmania - Communications Earth & Environment
Tasmanian stakeholders require targeted knowledge on ocean alkalinity enhancement to develop informed views, particularly regarding feasibility, impacts, governance, and policy objectives, according t...
www.nature.com
October 17, 2025 at 2:26 AM
It is good to see that a diverse set of stakeholders from Tasmania have a nuanced view on marine CO2 removal, specifically Ocean Alkalinity Enhancement.
This is encouraging and, indeed, important to follow their request and inform the public more.
🌊
www.nature.com/articles/s43...
This is encouraging and, indeed, important to follow their request and inform the public more.
🌊
www.nature.com/articles/s43...
"Carbon credits are failing to help with climate change — here’s why.
The idea that emissions can be offset through projects that claim to avoid releases or to remove carbon dioxide from the atmosphere is fatally flawed." by Macintosh et al.
www.nature.com/articles/d41...
The idea that emissions can be offset through projects that claim to avoid releases or to remove carbon dioxide from the atmosphere is fatally flawed." by Macintosh et al.
www.nature.com/articles/d41...
Carbon credits are failing to help with climate change — here’s why
The idea that emissions can be offset through projects that claim to avoid releases or to remove carbon dioxide from the atmosphere is fatally flawed.
www.nature.com
October 17, 2025 at 12:22 AM
"Carbon credits are failing to help with climate change — here’s why.
The idea that emissions can be offset through projects that claim to avoid releases or to remove carbon dioxide from the atmosphere is fatally flawed." by Macintosh et al.
www.nature.com/articles/d41...
The idea that emissions can be offset through projects that claim to avoid releases or to remove carbon dioxide from the atmosphere is fatally flawed." by Macintosh et al.
www.nature.com/articles/d41...
We are currently proposing a special issue in Biogeosciences to publish individual experiments of the "Ocean Alkalinity Enhancement Pelagic Impact Intercomparison Project #OAEPIIP".
Let me know if you are keen to serve as guest editors for the special issue ☺️
🌊
bg.copernicus.org/articles/21/...
Let me know if you are keen to serve as guest editors for the special issue ☺️
🌊
bg.copernicus.org/articles/21/...
Technical note: Ocean Alkalinity Enhancement Pelagic Impact Intercomparison Project (OAEPIIP)
Abstract. Ocean alkalinity enhancement (OAE) aims to transfer carbon dioxide (CO2) from the atmosphere to the ocean by increasing the capacity of seawater to store CO2. The potential effects of OAE-in...
bg.copernicus.org
October 16, 2025 at 3:32 AM
We are currently proposing a special issue in Biogeosciences to publish individual experiments of the "Ocean Alkalinity Enhancement Pelagic Impact Intercomparison Project #OAEPIIP".
Let me know if you are keen to serve as guest editors for the special issue ☺️
🌊
bg.copernicus.org/articles/21/...
Let me know if you are keen to serve as guest editors for the special issue ☺️
🌊
bg.copernicus.org/articles/21/...
Reposted by Lennart Bach
Lethal by design? Guiding environmental assessments of ocean alkalinity enhancement toward realistic contextualization of the alkalinity perturbation. cdrxiv.org/preprint/457
Lethal by design? Guiding environmental assessments of ocean alkalinity enhancement toward realistic contextualization of the alkalinity perturbation – CDRXIV
Ocean Alkalinity Enhancement (OAE) aims to mitigate climate change by increasing the chemical capacity of seawater to store anthropogenic CO2. OAE can be implemented through multiple pathways, each of...
cdrxiv.org
October 14, 2025 at 9:55 PM
Lethal by design? Guiding environmental assessments of ocean alkalinity enhancement toward realistic contextualization of the alkalinity perturbation. cdrxiv.org/preprint/457
Reposted by Lennart Bach
Seagrasses are great but this is false. Most carbon in the ocean is dissolved inorganic carbon and seagrass carbon is a tiny fraction of that. The mixing of stock and flux is also unhelpful. The only way to stop climate change is not burning fossil fuels.
reasonstobecheerful.world/seagrass-res...
reasonstobecheerful.world/seagrass-res...
October 11, 2025 at 11:45 PM
Seagrasses are great but this is false. Most carbon in the ocean is dissolved inorganic carbon and seagrass carbon is a tiny fraction of that. The mixing of stock and flux is also unhelpful. The only way to stop climate change is not burning fossil fuels.
reasonstobecheerful.world/seagrass-res...
reasonstobecheerful.world/seagrass-res...
Reposted by Lennart Bach
Does ocean model resolution change how fast CO₂ equilibrates with the air?
In our new study with @bachlennart.bsky.social and @mtyka.bsky.social, we found small resolution effects but large inter-model spreads —highlighting the next goal for improving mCDR predictions. link: doi.org/10.1029/2024...
In our new study with @bachlennart.bsky.social and @mtyka.bsky.social, we found small resolution effects but large inter-model spreads —highlighting the next goal for improving mCDR predictions. link: doi.org/10.1029/2024...
October 10, 2025 at 3:49 AM
Does ocean model resolution change how fast CO₂ equilibrates with the air?
In our new study with @bachlennart.bsky.social and @mtyka.bsky.social, we found small resolution effects but large inter-model spreads —highlighting the next goal for improving mCDR predictions. link: doi.org/10.1029/2024...
In our new study with @bachlennart.bsky.social and @mtyka.bsky.social, we found small resolution effects but large inter-model spreads —highlighting the next goal for improving mCDR predictions. link: doi.org/10.1029/2024...