Siv K Lauvset
@sivlauvset.bsky.social
Climate scientist. Ocean carbon cycle expert. Big fan of ocean observations
Reposted by Siv K Lauvset
Must read paper on pCO₂ measurements, especially for MRV of mCDR. Some key points:
Equilibrator-based instruments require more expertise but give much better results.
For membrane/in situ instruments, you could get significantly different results from instruments from the same manufacturer. 🙀🌊
Equilibrator-based instruments require more expertise but give much better results.
For membrane/in situ instruments, you could get significantly different results from instruments from the same manufacturer. 🙀🌊
The ICOS OTC pCO2 instrument intercomparison
In 2021, the Ocean Thematic Centre of the European Research Infrastructure “Integrated Carbon Observation System” conducted an international partial pressure of carbon dioxide (pCO2) instrument inter...
aslopubs.onlinelibrary.wiley.com
September 1, 2025 at 9:30 AM
Must read paper on pCO₂ measurements, especially for MRV of mCDR. Some key points:
Equilibrator-based instruments require more expertise but give much better results.
For membrane/in situ instruments, you could get significantly different results from instruments from the same manufacturer. 🙀🌊
Equilibrator-based instruments require more expertise but give much better results.
For membrane/in situ instruments, you could get significantly different results from instruments from the same manufacturer. 🙀🌊
Come work with us 🌊
🌊There is an available position as a postdoc at NORCE in ocean biochemical modelling fixed for a period of 2 years in Bergen.
The position will be affiliated with the Bjerknes Centre and is a part of OceanICU project.
🧪Read more and apply here: www.jobbnorge.no/en/available...
The position will be affiliated with the Bjerknes Centre and is a part of OceanICU project.
🧪Read more and apply here: www.jobbnorge.no/en/available...
August 8, 2025 at 5:13 PM
Come work with us 🌊
Reposted by Siv K Lauvset
🌊There is an available position as a postdoc at NORCE in ocean biochemical modelling fixed for a period of 2 years in Bergen.
The position will be affiliated with the Bjerknes Centre and is a part of OceanICU project.
🧪Read more and apply here: www.jobbnorge.no/en/available...
The position will be affiliated with the Bjerknes Centre and is a part of OceanICU project.
🧪Read more and apply here: www.jobbnorge.no/en/available...
August 8, 2025 at 8:35 AM
🌊There is an available position as a postdoc at NORCE in ocean biochemical modelling fixed for a period of 2 years in Bergen.
The position will be affiliated with the Bjerknes Centre and is a part of OceanICU project.
🧪Read more and apply here: www.jobbnorge.no/en/available...
The position will be affiliated with the Bjerknes Centre and is a part of OceanICU project.
🧪Read more and apply here: www.jobbnorge.no/en/available...
Reposted by Siv K Lauvset
🚨New GMD publication alert!🚨 🌊
Understanding the changing #Antarctic #SeaIce using MetROMS-UHel-v1.0, by Cecilia Äijälä and colleagues
gmd.copernicus.org/articles/18/...
Understanding the changing #Antarctic #SeaIce using MetROMS-UHel-v1.0, by Cecilia Äijälä and colleagues
gmd.copernicus.org/articles/18/...
Impacts of the CICE sea ice model and ERA atmosphere on an Antarctic MetROMS ocean model, MetROMS-UHel-v1.0
Abstract. In recent years, the Antarctic sea ice has experienced major changes, which are neither well understood nor adequately reproduced by Earth system models. To support model development with an...
gmd.copernicus.org
August 8, 2025 at 8:20 AM
🚨New GMD publication alert!🚨 🌊
Understanding the changing #Antarctic #SeaIce using MetROMS-UHel-v1.0, by Cecilia Äijälä and colleagues
gmd.copernicus.org/articles/18/...
Understanding the changing #Antarctic #SeaIce using MetROMS-UHel-v1.0, by Cecilia Äijälä and colleagues
gmd.copernicus.org/articles/18/...
Reposted by Siv K Lauvset
Changes to NOAA databases and products below 🌊
There's only one reason for Trump's massive deletion and closing of national climate, weather, ocean, & environmental data sets: to silence and turn a blind eye to evidence of major threats in order to protect the fossil-fuel industry. This is modern book burning.
www.nesdis.noaa.gov/about/docume...
www.nesdis.noaa.gov/about/docume...
Notice of Changes
Notices of changes are formal public announcements of planned services changes to applications and other products.
www.nesdis.noaa.gov
April 21, 2025 at 8:48 PM
Changes to NOAA databases and products below 🌊
Reposted by Siv K Lauvset
Postdoc position available studying the biological carbon pump within Jan Taucher's team at GEOMAR
🌊
www.geomar.de/en/karriere/...
🌊
www.geomar.de/en/karriere/...
Postdoc (m/f/d) position in ocean biogeochemistry
www.geomar.de
March 24, 2025 at 9:58 PM
Postdoc position available studying the biological carbon pump within Jan Taucher's team at GEOMAR
🌊
www.geomar.de/en/karriere/...
🌊
www.geomar.de/en/karriere/...
Exciting job opportunity to work with ICOS-Norway in Bergen 🌊
www.jobbnorge.no/en/available...
www.jobbnorge.no/en/available...
Postdoctoral Fellow in Marine Carbon Cycle Science (275511) | University of Bergen
Job title: Postdoctoral Fellow in Marine Carbon Cycle Science (275511), Employer: University of Bergen, Deadline: Thursday, March 6, 2025
www.jobbnorge.no
February 20, 2025 at 10:52 AM
Exciting job opportunity to work with ICOS-Norway in Bergen 🌊
www.jobbnorge.no/en/available...
www.jobbnorge.no/en/available...
Reposted by Siv K Lauvset
I am happy and grateful that I could contribute and work on this extensive review of the carbon cycle across the Arctic land-ocean aquatic continuum. 🏞️ 🌊
Have a look! The Arctic is such an amazing and interesting fast changing region in the world!
www.nature.com/articles/s43...
Have a look! The Arctic is such an amazing and interesting fast changing region in the world!
www.nature.com/articles/s43...
The land–ocean Arctic carbon cycle - Nature Reviews Earth & Environment
Anthropogenic warming is perturbing the Arctic carbon cycle. This Review provides an overview of contemporary carbon stocks and fluxes across terrestrial, aquatic and oceanic components of the integra...
www.nature.com
February 6, 2025 at 12:08 PM
I am happy and grateful that I could contribute and work on this extensive review of the carbon cycle across the Arctic land-ocean aquatic continuum. 🏞️ 🌊
Have a look! The Arctic is such an amazing and interesting fast changing region in the world!
www.nature.com/articles/s43...
Have a look! The Arctic is such an amazing and interesting fast changing region in the world!
www.nature.com/articles/s43...
Reposted by Siv K Lauvset
@eth-eaps.bsky.social is looking for an assistant professor to work on CO₂ removal (CDR). They say greenhouse gas but I don’t think we’re removing atmospheric CH₄ or N₂O. Lots of great people at ETH. Do apply by the end of this month! 🌊🧪
Assistant Professor (Tenure Track) of Geomitigation of Greenhouse Gases
ethz.ch
December 7, 2024 at 3:12 PM
@eth-eaps.bsky.social is looking for an assistant professor to work on CO₂ removal (CDR). They say greenhouse gas but I don’t think we’re removing atmospheric CH₄ or N₂O. Lots of great people at ETH. Do apply by the end of this month! 🌊🧪
Reposted by Siv K Lauvset
For those who are not marine chemists, this is the easiest way to see how adding alkalinity to the ocean lowers pCO₂ without changing dissolved inorganic carbon and potentially allows the ocean to take up more atmospheric CO₂. 🌊
December 7, 2024 at 1:05 AM
For those who are not marine chemists, this is the easiest way to see how adding alkalinity to the ocean lowers pCO₂ without changing dissolved inorganic carbon and potentially allows the ocean to take up more atmospheric CO₂. 🌊
Reposted by Siv K Lauvset
It’s interesting that the emojis show the earth from three angles 🌎 🌍 🌏 but not the fourth.
Though 🔵 is a fair approximation of what it would look like.
People underestimate the Pacific.
Though 🔵 is a fair approximation of what it would look like.
People underestimate the Pacific.
December 6, 2024 at 3:52 PM
It’s interesting that the emojis show the earth from three angles 🌎 🌍 🌏 but not the fourth.
Though 🔵 is a fair approximation of what it would look like.
People underestimate the Pacific.
Though 🔵 is a fair approximation of what it would look like.
People underestimate the Pacific.
Reposted by Siv K Lauvset
How does ocean acidification affect coccolithophores? 🌊:
(i) High CO2 (low pH) reduces growth rates by up to 87% (Ghux).
(i) Coccolith formation is disrupted with malformed structures at extreme pH (C. braarudii).
(ii) Carbon export capacity declines as PIC:POC ratios drop.
doi.org/10.1002/lno....
(i) High CO2 (low pH) reduces growth rates by up to 87% (Ghux).
(i) Coccolith formation is disrupted with malformed structures at extreme pH (C. braarudii).
(ii) Carbon export capacity declines as PIC:POC ratios drop.
doi.org/10.1002/lno....
Differential impacts of pH on growth, physiology, and elemental stoichiometry across three coccolithophore species
Coccolithophores are pivotal players in ocean biogeochemistry, yet the impact of changing pH on the physiology of different species remains unclear as there has been a dominant focus on Gephyrocapsa ...
doi.org
December 4, 2024 at 2:34 PM
How does ocean acidification affect coccolithophores? 🌊:
(i) High CO2 (low pH) reduces growth rates by up to 87% (Ghux).
(i) Coccolith formation is disrupted with malformed structures at extreme pH (C. braarudii).
(ii) Carbon export capacity declines as PIC:POC ratios drop.
doi.org/10.1002/lno....
(i) High CO2 (low pH) reduces growth rates by up to 87% (Ghux).
(i) Coccolith formation is disrupted with malformed structures at extreme pH (C. braarudii).
(ii) Carbon export capacity declines as PIC:POC ratios drop.
doi.org/10.1002/lno....
Reposted by Siv K Lauvset
Could the AMOC collapse and Bergen become 20 degrees colder (imagine the snow we would get!)? This and more in the latest Bjerknes podcast.
Dive into the depths of ocean science with the latest episode from the Bjerknes Centre Podcast. Join the debate on the future of the Atlantic Meridional Overturning Circulation (AMOC). Will it collapse? Weaken? Or surprise us? Two experts discuss the likelihood of various scenarios. 🌊🧪
New Podcast: Is the AMOC Going to Collapse?
In the latest episode of the Bjerknes Podcast, experts debate the future of the Atlantic Meridional Overturning Circulation (AMOC), a crucial component of the global climate system. Listen to colleagu...
bjerknes.uib.no
December 3, 2024 at 4:53 PM
Could the AMOC collapse and Bergen become 20 degrees colder (imagine the snow we would get!)? This and more in the latest Bjerknes podcast.
Reposted by Siv K Lauvset
🌊 News from Lydi Keppler et al.:
Mesoscale Eddies in the Southern Ocean tend to stimulate the CO₂ uptake in this key region for the carbon exchange between ocean and atmosphere.
👇
doi.org/10.1029/2024...
Mesoscale Eddies in the Southern Ocean tend to stimulate the CO₂ uptake in this key region for the carbon exchange between ocean and atmosphere.
👇
doi.org/10.1029/2024...
Effects of Mesoscale Eddies on Southern Ocean Biogeochemistry
Cyclonic eddies pump dissolved inorganic carbon and nitrate upward, leading to less oceanic carbon uptake (anticyclones opposite) Cyclonic eddies pump low-oxygen water upward (anticyclones opposi...
doi.org
December 3, 2024 at 10:19 AM
🌊 News from Lydi Keppler et al.:
Mesoscale Eddies in the Southern Ocean tend to stimulate the CO₂ uptake in this key region for the carbon exchange between ocean and atmosphere.
👇
doi.org/10.1029/2024...
Mesoscale Eddies in the Southern Ocean tend to stimulate the CO₂ uptake in this key region for the carbon exchange between ocean and atmosphere.
👇
doi.org/10.1029/2024...
Reposted by Siv K Lauvset
After the migration to Bluesky, I thought it is time to re-share the findings of my most recent 🌊 paper:
Decadal trends in the ocean CO2 sink are mostly driven by changes in the atmospheric CO2 growth rates on decadal timescales!
bg.copernicus.org/articles/21/...
Decadal trends in the ocean CO2 sink are mostly driven by changes in the atmospheric CO2 growth rates on decadal timescales!
bg.copernicus.org/articles/21/...
Drivers of decadal trends in the ocean carbon sink in the past, present, and future in Earth system models
Abstract. The ocean and the land biosphere are the two major sinks of anthropogenic carbon at present. When anthropogenic carbon emissions become zero and temperatures stabilize, the ocean is projecte...
bg.copernicus.org
December 4, 2024 at 11:58 AM
After the migration to Bluesky, I thought it is time to re-share the findings of my most recent 🌊 paper:
Decadal trends in the ocean CO2 sink are mostly driven by changes in the atmospheric CO2 growth rates on decadal timescales!
bg.copernicus.org/articles/21/...
Decadal trends in the ocean CO2 sink are mostly driven by changes in the atmospheric CO2 growth rates on decadal timescales!
bg.copernicus.org/articles/21/...
Position open at ICOS ocean thematic centre in Bergen 🌊
Fancy a move to Bergen to help build the ocean domain of ICOS? This job could be for you!
www.jobbnorge.no/en/available...
www.jobbnorge.no/en/available...
Permanent position as head of competence building in ICOS OTC (271502) | NORCE
Job title: Permanent position as head of competence building in ICOS OTC (271502), Employer: NORCE, Deadline: Friday, January 3, 2025
www.jobbnorge.no
December 3, 2024 at 4:32 PM
Position open at ICOS ocean thematic centre in Bergen 🌊
Reposted by Siv K Lauvset
Today, Wally Broecker would have been 93. He was obsessed with abrupt climate change that arrives suddenly and dramatically.
He likened the climate system to an "angry beast", and said we shouldn't poke it (i.e., keep emitting CO₂) because we don't know how and when it'll react.
We should listen.
He likened the climate system to an "angry beast", and said we shouldn't poke it (i.e., keep emitting CO₂) because we don't know how and when it'll react.
We should listen.
November 29, 2024 at 2:34 PM
Today, Wally Broecker would have been 93. He was obsessed with abrupt climate change that arrives suddenly and dramatically.
He likened the climate system to an "angry beast", and said we shouldn't poke it (i.e., keep emitting CO₂) because we don't know how and when it'll react.
We should listen.
He likened the climate system to an "angry beast", and said we shouldn't poke it (i.e., keep emitting CO₂) because we don't know how and when it'll react.
We should listen.
Reposted by Siv K Lauvset
Lecturer or Senior Lecturer in Marine Spatial Science at the Institute for Marine and Antarctic Studies (University of Tasmania, Australia). Closes 30 Nov (details in link below)
🐟🦑🧪
@utas.bsky.social careers.utas.edu.au/ci/en/job/50...
🐟🦑🧪
@utas.bsky.social careers.utas.edu.au/ci/en/job/50...
Current Vacancies
careers.utas.edu.au
November 28, 2024 at 7:39 AM
Lecturer or Senior Lecturer in Marine Spatial Science at the Institute for Marine and Antarctic Studies (University of Tasmania, Australia). Closes 30 Nov (details in link below)
🐟🦑🧪
@utas.bsky.social careers.utas.edu.au/ci/en/job/50...
🐟🦑🧪
@utas.bsky.social careers.utas.edu.au/ci/en/job/50...
Reposted by Siv K Lauvset
To everyone interested in marine CO2 removal (#mCDR). There is an important meeting coming up in Liege (Belgium) next year, 26-30 May (2025).
🌊
www.ocean-colloquium.uliege.be/cms/c_142299...
🌊
www.ocean-colloquium.uliege.be/cms/c_142299...
56th International Liège Colloquium on Ocean Dynamics
The Liège Colloquium is organized as a plenary event. Talks and posters will be organized within the following sessions (see the Overview for more details)
www.ocean-colloquium.uliege.be
November 29, 2024 at 12:46 AM
To everyone interested in marine CO2 removal (#mCDR). There is an important meeting coming up in Liege (Belgium) next year, 26-30 May (2025).
🌊
www.ocean-colloquium.uliege.be/cms/c_142299...
🌊
www.ocean-colloquium.uliege.be/cms/c_142299...
Reposted by Siv K Lauvset
New paper in open review. A continuation of work on extending and improving estimates for carbonation (uptake of carbon) by cement products worldwide.
Global and National CO2 Uptake by Cement Carbonation from 1928 to 2024
Abstract. The hydration products of cement materials can absorb atmospheric CO2, and this carbonation process provides an important decarbonization pathway for the cement industry. Global carbon seque...
essd.copernicus.org
November 28, 2024 at 9:39 AM
New paper in open review. A continuation of work on extending and improving estimates for carbonation (uptake of carbon) by cement products worldwide.
Reposted by Siv K Lauvset
Two postdoc positions in my group are opening: First is part of SOCCOM3 (3 years, NSF funded, S. Ocean carbon/oxygen/nutrient budgets), Second is part of InMOS (4.25 yrs, Schmidt Sciences / OBVI funded, long-term oxygen/carbon flux and inventory constraints). More info: bushinskyoceanlab.org/people/
People
Looking for two postdocs (SOCCOM and InMOS), details below. I am not currently planning to take on new students in Fall 2025. HI Cycles group at the 10th annual SOCCOM meeting at Princeton Universi…
bushinskyoceanlab.org
November 27, 2024 at 10:58 PM
Two postdoc positions in my group are opening: First is part of SOCCOM3 (3 years, NSF funded, S. Ocean carbon/oxygen/nutrient budgets), Second is part of InMOS (4.25 yrs, Schmidt Sciences / OBVI funded, long-term oxygen/carbon flux and inventory constraints). More info: bushinskyoceanlab.org/people/
Reposted by Siv K Lauvset
It's official: I received a science prize from the Royal Society of Arts and Sciences in Gothenburg 🥳
...for my "mild" obsession with #CMIP
More information, in Swedish only ->
www.gu.se/nyheter/celi...
...for my "mild" obsession with #CMIP
More information, in Swedish only ->
www.gu.se/nyheter/celi...
Céline Heuzé får pris för forskning om havets komplexitet i klimatmodeller
Céline Heuzé, docent i klimatvetenskap vid Göteborgs universitet, tilldelas Birger Karlssons vetenskapspris av Kungl. Vetenskaps- och Vitterhets-Samhället i Göteborg (KVVS). Priset delas ut vid KVVS å...
www.gu.se
November 28, 2024 at 3:52 PM
It's official: I received a science prize from the Royal Society of Arts and Sciences in Gothenburg 🥳
...for my "mild" obsession with #CMIP
More information, in Swedish only ->
www.gu.se/nyheter/celi...
...for my "mild" obsession with #CMIP
More information, in Swedish only ->
www.gu.se/nyheter/celi...
Reposted by Siv K Lauvset
Interesting paper that suggests diatoms are not as well exported from the upper ocean as we might have thought … 🌊
‘Inefficient transfer of diatoms through the subpolar Southern Ocean twilight zone’
www.nature.com/articles/s41...
‘Inefficient transfer of diatoms through the subpolar Southern Ocean twilight zone’
www.nature.com/articles/s41...
Inefficient transfer of diatoms through the subpolar Southern Ocean twilight zone - Nature Geoscience
Diatom skeletons largely remain near the surface of the subpolar Southern Ocean following diatom bloom events, suggesting that they do not play as big a role in the downward flux of organic matter as ...
www.nature.com
November 28, 2024 at 6:21 PM
Interesting paper that suggests diatoms are not as well exported from the upper ocean as we might have thought … 🌊
‘Inefficient transfer of diatoms through the subpolar Southern Ocean twilight zone’
www.nature.com/articles/s41...
‘Inefficient transfer of diatoms through the subpolar Southern Ocean twilight zone’
www.nature.com/articles/s41...
Reposted by Siv K Lauvset
Ocean Acidification is reshaping life and biogeochemical cycles.
In our latest study, Niki Gruber and I reconstructed its progression in the global ocean interior over the industrial era, based on our previous estimates of anthropogenic carbon accumulation.
doi.org/10.1126/scia...
A 🧵about the 🌊...
In our latest study, Niki Gruber and I reconstructed its progression in the global ocean interior over the industrial era, based on our previous estimates of anthropogenic carbon accumulation.
doi.org/10.1126/scia...
A 🧵about the 🌊...
Progression of ocean interior acidification over the industrial era
The rapid downward progression of anthropogenic carbon accelerates ocean interior acidification and threatens marine biota.
doi.org
November 28, 2024 at 9:22 AM
Ocean Acidification is reshaping life and biogeochemical cycles.
In our latest study, Niki Gruber and I reconstructed its progression in the global ocean interior over the industrial era, based on our previous estimates of anthropogenic carbon accumulation.
doi.org/10.1126/scia...
A 🧵about the 🌊...
In our latest study, Niki Gruber and I reconstructed its progression in the global ocean interior over the industrial era, based on our previous estimates of anthropogenic carbon accumulation.
doi.org/10.1126/scia...
A 🧵about the 🌊...