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/
Kind words by Mallory Ringham from Ebb Carbon about research informing the "Ocean Alkalinity Enhancement Pelagic Impact Intercomparison Project" #OAEPIIP.
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Agreed, the key benefit of OAEPIIP is bringing the OAE research community together.
onlinelibrary.wiley.com/doi/full/10....
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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....
Will this be a CO2 source because CaCO3 is deliberately precipitated and alkalinity is not replenished? 🤔
Possibly a net source of CO2 when the organics are respired and the solid carbonates remain.
Possibly a net source of CO2 when the organics are respired and the solid carbonates remain.
June 30, 2025 at 9:55 AM
Will this be a CO2 source because CaCO3 is deliberately precipitated and alkalinity is not replenished? 🤔
Possibly a net source of CO2 when the organics are respired and the solid carbonates remain.
Possibly a net source of CO2 when the organics are respired and the solid carbonates remain.
@marcosfontela.bsky.social and team commencing their ocean alkalinity enhancement experiment within #OAEPIIP in Vigo (Spain). Go team Vigo!!! 🤜🤛
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appliedbgc.imas.utas.edu.au/ocean-alkali...
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appliedbgc.imas.utas.edu.au/ocean-alkali...
May 15, 2025 at 12:18 AM
@marcosfontela.bsky.social and team commencing their ocean alkalinity enhancement experiment within #OAEPIIP in Vigo (Spain). Go team Vigo!!! 🤜🤛
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appliedbgc.imas.utas.edu.au/ocean-alkali...
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appliedbgc.imas.utas.edu.au/ocean-alkali...
A great indicator for a healthy lab environment is when you insult each other and go home more happily thereafter. 🫶
May 1, 2025 at 1:58 AM
A great indicator for a healthy lab environment is when you insult each other and go home more happily thereafter. 🫶
We tested how wave energy increases ocean alkalinity enhancement (OAE) rates. Wave energy does increase olivine dissolution BUT it also enhances rates of secondary alkalinity loss, hence reducing the benefits of waves for #OAE.
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agupubs.onlinelibrary.wiley.com/doi/10.1029/...
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agupubs.onlinelibrary.wiley.com/doi/10.1029/...
April 27, 2025 at 10:05 PM
We tested how wave energy increases ocean alkalinity enhancement (OAE) rates. Wave energy does increase olivine dissolution BUT it also enhances rates of secondary alkalinity loss, hence reducing the benefits of waves for #OAE.
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agupubs.onlinelibrary.wiley.com/doi/10.1029/...
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agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Benthic flux chamber deployments with @nadlehmann.bsky.social to study interactions of alkaline materials with natural alkalinity fluxes. Snorkling in the bay, no wind, sun setting behind kunanji while processing samples. Sometimes, science is pure joy.
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March 27, 2025 at 8:46 AM
Benthic flux chamber deployments with @nadlehmann.bsky.social to study interactions of alkaline materials with natural alkalinity fluxes. Snorkling in the bay, no wind, sun setting behind kunanji while processing samples. Sometimes, science is pure joy.
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@mpelletier.bsky.social is PhD student investigating how benthic organisms respond to OAE. She is hardcore diver, getting shit done underwater. Marienne completed experiments how kelp responds to various OAE methods (stay tuned!). She is also key to the team's OAE field research efforts. 🌊
March 19, 2025 at 12:10 AM
@mpelletier.bsky.social is PhD student investigating how benthic organisms respond to OAE. She is hardcore diver, getting shit done underwater. Marienne completed experiments how kelp responds to various OAE methods (stay tuned!). She is also key to the team's OAE field research efforts. 🌊
If you are interested in marine carbon dioxide removal (#mCDR) in general and Ocean Alkalinity Enhancement (#OAE) specifically than consider following the scientist of our "applied marine biogeochemistry" team in Tasmania.
A short intro to everyone's expertise.
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A short intro to everyone's expertise.
👇🌊
March 19, 2025 at 12:10 AM
If you are interested in marine carbon dioxide removal (#mCDR) in general and Ocean Alkalinity Enhancement (#OAE) specifically than consider following the scientist of our "applied marine biogeochemistry" team in Tasmania.
A short intro to everyone's expertise.
👇🌊
A short intro to everyone's expertise.
👇🌊
Science shouldn't be regarded as a return-of-investment enterprise. But if you think research money just evaporates in the ivory tower, it does not.
$3.32 return on every funding dollar by the Australian Research Council over a 20 years horizon.
$3.32 return on every funding dollar by the Australian Research Council over a 20 years horizon.
March 12, 2025 at 3:41 AM
Science shouldn't be regarded as a return-of-investment enterprise. But if you think research money just evaporates in the ivory tower, it does not.
$3.32 return on every funding dollar by the Australian Research Council over a 20 years horizon.
$3.32 return on every funding dollar by the Australian Research Council over a 20 years horizon.
77 days after deployment there is no obvious visible sign of alkaline mineral left on the plots (see below).
Let's see if we find something interesting in the emerging data.
Thanks to Damon Britton, @mpelletier.bsky.social and @nadlehmann.bsky.social for pushing boundaries.
Let's see if we find something interesting in the emerging data.
Thanks to Damon Britton, @mpelletier.bsky.social and @nadlehmann.bsky.social for pushing boundaries.
February 11, 2025 at 1:06 AM
77 days after deployment there is no obvious visible sign of alkaline mineral left on the plots (see below).
Let's see if we find something interesting in the emerging data.
Thanks to Damon Britton, @mpelletier.bsky.social and @nadlehmann.bsky.social for pushing boundaries.
Let's see if we find something interesting in the emerging data.
Thanks to Damon Britton, @mpelletier.bsky.social and @nadlehmann.bsky.social for pushing boundaries.
10/11
In the conclusions of his paper @mtyka.bsky.social implicitly makes the point to reconsider "atmospheric carbon dioxide removal" as "anthropogenic carbon dioxide removal" (in much more elaborate and complete way).
In the conclusions of his paper @mtyka.bsky.social implicitly makes the point to reconsider "atmospheric carbon dioxide removal" as "anthropogenic carbon dioxide removal" (in much more elaborate and complete way).
January 19, 2025 at 5:04 AM
10/11
In the conclusions of his paper @mtyka.bsky.social implicitly makes the point to reconsider "atmospheric carbon dioxide removal" as "anthropogenic carbon dioxide removal" (in much more elaborate and complete way).
In the conclusions of his paper @mtyka.bsky.social implicitly makes the point to reconsider "atmospheric carbon dioxide removal" as "anthropogenic carbon dioxide removal" (in much more elaborate and complete way).
This blog by @romany-webb.bsky.social is massively informative. The considerations of pros and cons (instead of just cons) of "marine geoengineering" by the Parties to the London Convention/Protocol is crucial to allow a more nuanced debate about them and indeed an important step forward.
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January 9, 2025 at 10:57 PM
This blog by @romany-webb.bsky.social is massively informative. The considerations of pros and cons (instead of just cons) of "marine geoengineering" by the Parties to the London Convention/Protocol is crucial to allow a more nuanced debate about them and indeed an important step forward.
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Quite some hefty challenges to overcome but in the end we managed and had a cold Cascade at the shack, because hard work deserves a draught 🍺
www.youtube.com/watch?v=1rOD...
www.youtube.com/watch?v=1rOD...
January 7, 2025 at 3:28 AM
Quite some hefty challenges to overcome but in the end we managed and had a cold Cascade at the shack, because hard work deserves a draught 🍺
www.youtube.com/watch?v=1rOD...
www.youtube.com/watch?v=1rOD...
Probably more people would take the bus to work of they knew they would get some nice views at the bus stop plus 35 minutes of time for undisturbed deep thinking. Get so much done, should probably cruise around all day.
December 16, 2024 at 9:46 PM
Probably more people would take the bus to work of they knew they would get some nice views at the bus stop plus 35 minutes of time for undisturbed deep thinking. Get so much done, should probably cruise around all day.
4/n
Thus, the main progress in the LULUCF sector is from stopping to chop down trees (e.g. by paying "avoidance credits" to land owners). The problem is that short-term CO2 or other greenhouse gas sources and sinks are mainly compared with releasing CO2 from a fossil (long-term) carbon pool.
Thus, the main progress in the LULUCF sector is from stopping to chop down trees (e.g. by paying "avoidance credits" to land owners). The problem is that short-term CO2 or other greenhouse gas sources and sinks are mainly compared with releasing CO2 from a fossil (long-term) carbon pool.
November 27, 2024 at 2:33 AM
4/n
Thus, the main progress in the LULUCF sector is from stopping to chop down trees (e.g. by paying "avoidance credits" to land owners). The problem is that short-term CO2 or other greenhouse gas sources and sinks are mainly compared with releasing CO2 from a fossil (long-term) carbon pool.
Thus, the main progress in the LULUCF sector is from stopping to chop down trees (e.g. by paying "avoidance credits" to land owners). The problem is that short-term CO2 or other greenhouse gas sources and sinks are mainly compared with releasing CO2 from a fossil (long-term) carbon pool.
3/n
So, when having a closer look at LULUCF the following becomes apparent. LULUCF was one of the major emitting sectors in 2005 (see below; compare with electricity currently emitting ~35 Mt CO2-e.). Since 2005, LULUCF has turned from a substantial source to a sink of greenhouse gases.
So, when having a closer look at LULUCF the following becomes apparent. LULUCF was one of the major emitting sectors in 2005 (see below; compare with electricity currently emitting ~35 Mt CO2-e.). Since 2005, LULUCF has turned from a substantial source to a sink of greenhouse gases.
November 27, 2024 at 2:33 AM
3/n
So, when having a closer look at LULUCF the following becomes apparent. LULUCF was one of the major emitting sectors in 2005 (see below; compare with electricity currently emitting ~35 Mt CO2-e.). Since 2005, LULUCF has turned from a substantial source to a sink of greenhouse gases.
So, when having a closer look at LULUCF the following becomes apparent. LULUCF was one of the major emitting sectors in 2005 (see below; compare with electricity currently emitting ~35 Mt CO2-e.). Since 2005, LULUCF has turned from a substantial source to a sink of greenhouse gases.
2/n
In the other sectors, progress is moderate or emissions are increasing (here a figure including all sector except for LULUCF).
In the other sectors, progress is moderate or emissions are increasing (here a figure including all sector except for LULUCF).
November 27, 2024 at 2:33 AM
2/n
In the other sectors, progress is moderate or emissions are increasing (here a figure including all sector except for LULUCF).
In the other sectors, progress is moderate or emissions are increasing (here a figure including all sector except for LULUCF).
1/n The average quarterly emissions in Australia follow a decreasing trend.
However, if you look more closely into what drives the trend it is primarily the LULUCF sector (land-use, land-use change and forestry).
However, if you look more closely into what drives the trend it is primarily the LULUCF sector (land-use, land-use change and forestry).
November 27, 2024 at 2:33 AM
1/n The average quarterly emissions in Australia follow a decreasing trend.
However, if you look more closely into what drives the trend it is primarily the LULUCF sector (land-use, land-use change and forestry).
However, if you look more closely into what drives the trend it is primarily the LULUCF sector (land-use, land-use change and forestry).
it would probably be possible to get such a table via PHREEQC. I will need to look into this software, so far haven't used it
November 24, 2024 at 9:14 PM
it would probably be possible to get such a table via PHREEQC. I will need to look into this software, so far haven't used it
Another (terrible) way field research can go wrong... Someone cranked up our lab fridge, causing some alkalinity samples to freeze. A quick test reaffirmed the damage. Does anyone know if there is a way to recover frozen alkalinity samples?
@agdco2.bsky.social @mphumphreys.bsky.social
@agdco2.bsky.social @mphumphreys.bsky.social
November 19, 2024 at 9:16 PM
Another (terrible) way field research can go wrong... Someone cranked up our lab fridge, causing some alkalinity samples to freeze. A quick test reaffirmed the damage. Does anyone know if there is a way to recover frozen alkalinity samples?
@agdco2.bsky.social @mphumphreys.bsky.social
@agdco2.bsky.social @mphumphreys.bsky.social
Actually these guys do the heavy lifting this time.
Aaron almost submitted his Phd thesis 😀 and already left Tassie 😔
He is now looking for postdocs overseas, which he will get because he is great.
Aaron almost submitted his Phd thesis 😀 and already left Tassie 😔
He is now looking for postdocs overseas, which he will get because he is great.
November 6, 2024 at 3:18 AM
Actually these guys do the heavy lifting this time.
Aaron almost submitted his Phd thesis 😀 and already left Tassie 😔
He is now looking for postdocs overseas, which he will get because he is great.
Aaron almost submitted his Phd thesis 😀 and already left Tassie 😔
He is now looking for postdocs overseas, which he will get because he is great.
Field work on ocean alkalinity enhancement can go wrong in so many ways
November 5, 2024 at 12:01 PM
Field work on ocean alkalinity enhancement can go wrong in so many ways
The applied biogeochemistry group on some non scientific mountaineering upon Collins Bonnet in beautiful Tasmania. Since all we do is marine, we thought would be nice to go the other direction for a change.
October 11, 2024 at 6:47 AM
The applied biogeochemistry group on some non scientific mountaineering upon Collins Bonnet in beautiful Tasmania. Since all we do is marine, we thought would be nice to go the other direction for a change.
The article reflects well how it remained unclear what mCDR method Running Tide tried to pursue.
Also, one sentence in the report made me laugh hard (I can relate 😅).
Also, one sentence in the report made me laugh hard (I can relate 😅).
September 20, 2024 at 1:03 AM
The article reflects well how it remained unclear what mCDR method Running Tide tried to pursue.
Also, one sentence in the report made me laugh hard (I can relate 😅).
Also, one sentence in the report made me laugh hard (I can relate 😅).
This is an interesting article by Andre Visser.
It makes the point that marine biogenic carbon reservoirs (e.g. Blue Carbon, BCP) won't contribute to CDR but should be protected to not generate new emissions.
Do we need to define "sea-use-change emissions"? 🌊
www.biorxiv.org/content/10.1...
It makes the point that marine biogenic carbon reservoirs (e.g. Blue Carbon, BCP) won't contribute to CDR but should be protected to not generate new emissions.
Do we need to define "sea-use-change emissions"? 🌊
www.biorxiv.org/content/10.1...
September 19, 2024 at 3:10 AM
This is an interesting article by Andre Visser.
It makes the point that marine biogenic carbon reservoirs (e.g. Blue Carbon, BCP) won't contribute to CDR but should be protected to not generate new emissions.
Do we need to define "sea-use-change emissions"? 🌊
www.biorxiv.org/content/10.1...
It makes the point that marine biogenic carbon reservoirs (e.g. Blue Carbon, BCP) won't contribute to CDR but should be protected to not generate new emissions.
Do we need to define "sea-use-change emissions"? 🌊
www.biorxiv.org/content/10.1...