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Siv K Lauvset

@sivlauvset.bsky.social
462 followers 323 following 6 posts

Climate scientist. Ocean carbon cycle expert. Big fan of ocean observations

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Reposted by Siv K Lauvset
David Ho @davidho.bsky.social · 01/09/2025
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. 🙀🌊
aslopubs.onlinelibrary.wiley.com
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...
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Siv K Lauvset @sivlauvset.bsky.social · 08/08/2025
Come work with us 🌊
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Reposted by Siv K Lauvset
Bjerknes Center for Climate Research (BCCR) @bjerknes.uib.no · 08/08/2025
🌊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...
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Andrew Yool @dryool.bsky.social · 08/08/2025
🚨New GMD publication alert!🚨 🌊 Understanding the changing #Antarctic #SeaIce using MetROMS-UHel-v1.0, by Cecilia Äijälä and colleagues gmd.copernicus.org/articles/18/...
gmd.copernicus.org
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...
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Ryan H Glaubke @ocnogrphr.bsky.social · 21/04/2025
Changes to NOAA databases and products below 🌊
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Lennart Bach @bachlennart.bsky.social · 24/03/2025
Postdoc position available studying the biological carbon pump within Jan Taucher's team at GEOMAR 🌊 www.geomar.de/en/karriere/...
geomar.de
Postdoc (m/f/d) position in ocean biogeochemistry
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Siv K Lauvset @sivlauvset.bsky.social · 20/02/2025
Exciting job opportunity to work with ICOS-Norway in Bergen 🌊 www.jobbnorge.no/en/available...
jobbnorge.no
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
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Jens Terhaar @polarocean.bsky.social · 06/02/2025
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...
nature.com
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...
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Dr. Jessica N. Cross @jessicancross.bsky.social · 10/12/2024
More shameless self promotion: Visit 0240 in the #agu24 poster hall this foggy Tuesday afternoon!
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David Ho @davidho.bsky.social · 07/12/2024
@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! 🌊🧪
ethz.ch
Assistant Professor (Tenure Track) of Geomitigation of Greenhouse Gases
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David Ho @davidho.bsky.social · 07/12/2024
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. 🌊
The image depicts a phase diagram illustrating the relationship between total alkalinity and dissolved inorganic carbon in aquatic systems. Key processes such as photosynthesis, respiration, and CaCO₃ formation and dissolution are labeled, with arrows indicating the directions of alkalinity addition.
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Hank Green @hankgreen.bsky.social · 06/12/2024
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.
A picture of the earth showing the pacific ocean. You can see hawaii and New Zealand. Also the edge of antarctica, australia, and north and south america...but barely.
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Jelena Godrijan 🫧❾🌊🦋 @godi.bsky.social · 04/12/2024
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....
doi.org
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 ...
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Marius Årthun @mariusarthun.bsky.social · 03/12/2024
Could the AMOC collapse and Bergen become 20 degrees colder (imagine the snow we would get!)? This and more in the latest Bjerknes podcast.
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Jens Daniel Müller @jens-d-mueller.bsky.social · 03/12/2024
🌊 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...
doi.org
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...
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Jens Terhaar @polarocean.bsky.social · 04/12/2024
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/...
bg.copernicus.org
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...
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Siv K Lauvset @sivlauvset.bsky.social · 03/12/2024
Position open at ICOS ocean thematic centre in Bergen 🌊
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David Ho @davidho.bsky.social · 29/11/2024
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.
A cartoon depicting a person (labeled “us”) poking an illustrated green dragon labeled "ANGRY BEAST" with a stick. The quote from Wally Broecker, "Climate is an angry beast and we are poking at it with sticks," is included at the top.
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Lachlan Fetterplace @fiskeforbrains.bsky.social · 28/11/2024
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...
careers.utas.edu.au
Current Vacancies
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Lennart Bach @bachlennart.bsky.social · 29/11/2024
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...
ocean-colloquium.uliege.be
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)
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Robbie Andrew @robbieandrew.bsky.social · 28/11/2024
New paper in open review. A continuation of work on extending and improving estimates for carbonation (uptake of carbon) by cement products worldwide.
essd.copernicus.org
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...
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Seth Bushinsky @sethbushinsky.bsky.social · 27/11/2024
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/
bushinskyoceanlab.org
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…
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Céline Heuzé @clnhz.bsky.social · 28/11/2024
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...
gu.se
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...
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Prof Alessandro Tagliabue @altagliabue.bsky.social · 28/11/2024
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...
nature.com
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 ...
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Jens Daniel Müller @jens-d-mueller.bsky.social · 28/11/2024
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 🌊...
doi.org
Progression of ocean interior acidification over the industrial era
The rapid downward progression of anthropogenic carbon accelerates ocean interior acidification and threatens marine biota.
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David Ho @davidho.bsky.social · 27/11/2024
Even if CO₂ emissions decreased as much as it did during COVID every year until 2030, we would still miss the 1.5°C target (emissions of 20 GtCO₂/yr by 2023) by a lot.
A graph displaying global CO2 emissions from energy and industrial processes, showing data from 2000 to 2024, and projected trends needed from 2000 to 2100 to achieve 1.5°C. It includes a dotted vertical line indicating 2030, and a red point indicating 20 GtCO₂/yr and various scenario lines demonstrating emission pathways. The decrease during COVID is projected from 2024 to 2030, missing the target by a lot.
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Lisa Beal @letstalkocean.bsky.social · 27/11/2024
Want to make a difference? Come work here! Miami needs ocean and climate scientists.
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David Ho @davidho.bsky.social · 18/11/2024
I've been fighting ocean tech bros calling the stripping of CO₂ from seawater "Direct Ocean Capture (DOC)", just because it sounds like Direct Air Capture. Call it Direct Ocean Removal (DOR) because DOC is dissolved organic carbon to oceanographers. Here's an article about mCDR and the real DOC. 🌊
bg.copernicus.org
Ocean liming effects on dissolved organic matter dynamics
Abstract. Ocean liming has gained attention as a potential solution to mitigate climate change by actively removing carbon dioxide (CO2) from the atmosphere. The addition of hydrated lime to oceanic s...
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Glen Peters @glenpeters.bsky.social · 18/11/2024
Nearly all developed countries report all their forests as 'managed', which means they report all carbon uptake in forests even if it was caused by climate change (CO2 fertilisation). Is this a problem? More on this later today (article coming) Meanwhile: www.ipcc-nggip.iges.or.jp/public/mtdoc...
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Cyril Brunner @brunncy.bsky.social · 17/11/2024
How long does CO₂ have to be stored in #CarbonDioxideRemoval #CDR? At least 35 years? 100 years? Longer?🤔 In a new study, @hausfath.bsky.social, @retoknutti.bsky.social & I find that for #netzero CO₂, anything less than 1000 years is not enough to neutralize warming.🧵 www.nature.com/articles/s43...
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Alice Marzocchi @alicemarzocchi.bsky.social · 16/11/2024
Apply for an exciting PhD with us at the University of Southampton and the National Oceanography Centre, also in collaboration with BAS 🌊🌍🧊 “Going going gone: physical and biogeochemical responses to Antarctic sea ice loss” www.findaphd.com/phds/project... Application deadline: 8 January 2025
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Carbon Brief @carbonbrief.org · 15/11/2024
Thank you for joining our #COP29 webinar earlier today. If you missed the webinar, you can watch it in full here ⬇️ buff.ly/48PB06w
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Katharine Hayhoe @katharinehayhoe.com · 13/11/2024
How much carbon are humans currently producing, how has this changed over the last year, where are our emissions going, and what do we expect in the future? You do not want to miss this thread by the leader of the global carbon budget project ⬇️
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Jens Terhaar @polarocean.bsky.social · 14/11/2024
During #RECCAP2, we have found a few reasons that show why ocean models in hindcast mode underestimate the ocean carbon sink, some are due to the setup and some due to physics and biogeochemistry (agupubs.onlinelibrary.wiley.com/doi/epdf/10....).
agupubs.onlinelibrary.wiley.com
Assessment of Global Ocean Biogeochemistry Models for Ocean Carbon Sink Estimates in RECCAP2 and Recommendations for Future Studies
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Robbie Andrew @robbieandrew.bsky.social · 13/11/2024
Today's release of the 2024 edition of the Global Carbon Budget, as an interactive slide presentation. Here: robbieandrew.github.io/GCB2024/slid...
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David Ho @davidho.bsky.social · 13/11/2024
Routine observations are not exciting. Yet, measurements of surface ocean partial pressure of CO₂ (pCO₂; think of this as concentration) are important for determining annual ocean CO₂ uptake. It's alarming that the number of observations has been decreasing. 🌊 essd.copernicus.org/preprints/es...
A line graph depicting the ocean sink for carbon dioxide (Sₒᑐₑₐₙ) from 1960 to 2020. It includes multiple data series represented by different colored lines, showing CO₂ flux in Gt. Also shown are the number of monthly observation gird cells available, showing a decline for about a decade.
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Alexander Verbeek @alexverbeek.bsky.social · 13/11/2024
If you have any reach on Bluesky, please consider reposting so I can find friends old and new: I'm Alexander Verbeek and publish about the climate crisis, environment, the beauty of nature, science, walking, sustainability, wildlife, photography, water, and energy.
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Pierre Friedlingstein @pfriedling.bsky.social · 13/11/2024
The global carbon budget 2024 is out
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Scott Doney @scottdoney.bsky.social · 14/11/2024
reposted with 🌊 Postdoc position available in computational ocean biogeochemistry in my group at U. Virginia. Focus is primarily on the response of coastal and marine ecosystems to natural variability, climate change, and direct human perturbations jobs.virginia.edu/us/en/job/R0...
jobs.virginia.edu
Research Associate in Environmental Sciences in Charlottesville, Virginia, United States of America | Research at University of Virginia
Apply for Research Associate in Environmental Sciences job with University of Virginia in Charlottesville, Virginia, United States of America. Research at University of Virginia
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Siv K Lauvset @sivlauvset.bsky.social · 14/11/2024
Great thread about the #GlobalCarbonBudget
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Bjerknes Center for Climate Research (BCCR) @bjerknes.uib.no · 13/11/2024
More CO2 in the atmosphere means more CO2 in the ocean. Emissions have not stopped rising, according to the Global Carbon Budget 2024, released today.🌊 bjerknes.uib.no/en/node/3941
bjerknes.uib.no
Increased CO2 uptake by the ocean
The ocean takes up more than three times as much CO2 from the atmosphere as in 1860. The main culprit is the higher concentration of CO2 in the atmosphere. Emissions have not stopped rising, new repor...
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Judith Hauck @jhauck.bsky.social · 27/02/2024
#PaperAlert The Impact of Recent Climate Change on the Global Ocean Carbon Sink Proud to see this piece of work from Frauke Bunsen's master thesis out in GRL. agupubs.onlinelibrary.wiley.com/doi/10.1029/...
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Judith Hauck @jhauck.bsky.social · 13/11/2024
The ocean takes up anthropogenic CO₂ emissions, 26% on average over the past decade. The #GlobalCarbonBudget 2024 confirms that the ocean sink increased in 2023 after 3 years of stagnation due to rare triple La Niña event. 2023 was an El Niño year, with an expected increase in the sink. 🔽 🌊 1/10
line plot, each line shows one individual estimate of the ocean carbon sink from models or observation-based models.  the black line shows the best estimate. Barplot at bottom right shows number of surface ocean CO2 observations.
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Dr. Jessica N. Cross @jessicancross.bsky.social · 14/11/2024
Looking for an #mCDR postdoc? Consider working with us at PNNL: careers.pnnl.gov/jobs/9956?la...
careers.pnnl.gov
Post Doctoral RA – Coastal Biogeochemistry in Sequim, Washington | Pacific Northwest National Laboratory
PNNL is hiring a Post Doctoral RA – Coastal Biogeochemistry in Sequim, Washington. Review all of the job details and apply today!
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David Ho @davidho.bsky.social · 13/11/2024
If you learn anything today, it should be this: We're burning more fossil fuels and releasing more fossil fuel CO₂ than ever. Despite what people had hoped, anthropogenic CO₂ emissions have not peaked. To stay below +1.5°C of global warming, we're supposed to cut emissions by 50% by 2030. 🥲
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David Ho @davidho.bsky.social · 12/11/2024
It's finally here! "Today, the White House Office of Science and Technology Policy (OSTP) is releasing a national strategy to advance research on the benefits, risks, and tradeoffs of marine carbon dioxide removal [mCDR], an innovative technology that could help address the climate crisis." 🌊
whitehouse.gov
White House Office of Science and Technology Policy Releases National Marine Carbon Dioxide Removal Research Strategy | OSTP | The White House
Today, the White House Office of Science and Technology Policy (OSTP) is releasing a national strategy to advance research on the benefits, risks, and tradeoffs of marine carbon dioxide removal, an in...
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Dr. Or M. Bialik |📚|🔬|🌊|⚒️ @obialik.bsky.social · 09/11/2024
So, is anyone interested in and wants to follow people doing marine biogeochemistry? I might have a starter pack for you! (also, I blame @malinodalen.bsky.social for this) bsky.app/starter-pack... Spot anyone not there (maybe you?), say something.
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David Ho @davidho.bsky.social · 10/11/2024
Interesting map of which startup is proposing which technique for marine carbon dioxide removal (mCDR), and where they are in their development. At @cworthy.bsky.social, we're producing open-source tools that any of them can use, starting with the abiotic techniques. counteract.vc/perspectives...
A matrix of startups proposing different mCDR techniques, including Direct Ocean Removal, River/Ocean Alkalinity Enhancement, Artificial
upwelling/downwelling, Ocean fertilisation, Algae cultivation/sinking, and Coastal blue carbon
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Matthias C. Rillig @mrillig.bsky.social · 09/11/2024
Interested in coming to Berlin to work on climate-change related issues? Consider this fellowship from the @humboldt-foundation.de International Climate Protection Fellowship www.humboldt-foundation.de/en/apply/spo...
humboldt-foundation.de
International Climate Protection Fellowship
For prospective leaders and postdocs from developing countries
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Ruth Mottram @ruthmottram.eurosky.social · 08/11/2024
Russia opened its tenth base + China its fifth, India is building a third + Turkey is planning its first. Iran ...has said it wants an Antarctic base to claim its “property rights How to avoid anarchy in #Antarctica www.economist.com/leaders/2024/10/3…
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