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Jens Daniel Müller

@jens-d-mueller.bsky.social
1K followers 590 following 132 posts

Ocean Carbon Cycle and Climate Solutions // Research Fellow at Carbon to Sea jens-daniel-mueller.github.io

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Reposted by Jens Daniel Müller
EGU Ocean Sciences @egu-os.bsky.social · 20/07/2026
🌊 𝗙𝗶𝗳𝘁𝘆 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗼𝗰𝗲𝗮𝗻 𝗰𝗵𝗲𝗺𝗶𝘀𝘁𝗿𝘆 𝗶𝗻 𝗼𝗻𝗲 𝗽𝗹𝗮𝗰𝗲: 𝗚𝗟𝗢𝗗𝗔𝗣𝘃𝟯 One seawater sample captures one place, one depth and one moment. Combined with millions of others it can help reveal how the ocean is changing. This blog post introduces GLODAPv3 and the work behind this global synthesis 👉 bit.ly/3Rj4K7K
bit.ly
Fifty years of ocean chemistry in one place: GLODAPv3 is here!
Working with marine carbonate-system observations has taught me how much effort lies behind every row of an oceanographic dataset: long hours at sea, careful sampling, laboratory analyses, calibration...
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Jens Daniel Müller @jens-d-mueller.bsky.social · 01/06/2026
🚨 The latest Global Carbon Budget 2025 is officially out: doi.org/10.5194/essd... I’m excited to share three major updates particularly relevant to the 🌊 carbon community:
doi.org
Global Carbon Budget 2025
Abstract. Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, and terrestrial biosphere in a changing climate is critical to bette...
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Prof Alessandro Tagliabue @altagliabue.bsky.social · 09/05/2026
Why do climate models disagree so much in forecasting ocean net primary production under different emissions scenarios? Check out this new paper by @natlegrix.bsky.social and I 🌊 agupubs.onlinelibrary.wiley.com/doi/10.1029/...
agupubs.onlinelibrary.wiley.com
Sources of Uncertainty in Ocean Net Primary Productivity Projections Under Climate Change
Disagreement on the preindustrial state of net primary productivity (NPP) dominates the uncertainty in absolute rates of NPP Earth system models project divergent long-term shifts in the decadal ...
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Reposted by Jens Daniel Müller
CarbonPlan @carbonplan.org · 06/05/2026
OffsetsDB just got bigger. Today, we added two new offset registries — Isometric and Cercarbono — to our open database that standardizes information about offset projects and their credits. Now researchers can access data from seven registries, which cover the vast majority of the carbon market.
carbonplan.org
Welcoming Isometric and Cercarbono to OffsetsDB – CarbonPlan
We’ve added two new offset registries to OffsetsDB.
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Ken Johnson @montereyken.bsky.social · 06/05/2026
A sad day. Jorge Sarmiento, one of the greats in ocean science, passed away today. Jorge was a model leader; thoughtful, compassionate, and an excellent scientist. His leadership of @soccomproject.bsky.social transformed @bgc-argo.bsky.social into a global system.
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Jens Daniel Müller @jens-d-mueller.bsky.social · 14/04/2026
🌊 This summer, I’m co-organizing a OAE model skill assessment workshop. We’ll spend 5 days in an amazing location in southern Germany, together with ~30 hand-picked experts. A few seats are open for applications. Just share a brief note on why you’d like to join: www.carbontosea.org/2026/04/13/o...
carbontosea.org
Apply now for the OAE Model Skill Assessment Workshop - Carbon to Sea Initiative
The Carbon to Sea Initiative, with guidance and support from a steering committee, will be hosting a workshop from June 29-July 4 to develop guidelines for biogeochemical model skill assessment, align...
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Reposted by Jens Daniel Müller
Ben Sanderson @benmsanderson.bsky.social · 08/04/2026
So... now we can breathe again. Let's talk about ScenarioMIP. The final version is now up on GMD - and there's some changes since the first draft. /THREAD/ gmd.copernicus.org/articles/19/...
gmd.copernicus.org
The Scenario Model Intercomparison Project for CMIP7 (ScenarioMIP-CMIP7)
Abstract. Scenarios serve as a critical tool in climate change analysis, enabling the exploration of future evolution of the climate system, climate impacts, and the human system (including mitigation...
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Helen Czerski @helenczerski.bsky.social · 21/02/2026
If you’re at #OSM26 in Glasgow, I’ve just signed lots of copies of Blue Machine that are now on sale in the shop at @glasgowscience.bsky.social 🌊🌊 Share the ocean love!
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Jens Daniel Müller @jens-d-mueller.bsky.social · 15/01/2026
Extremely insightful and complex study on ocean alkalinity enhancement under different future emission scenario. Congratulations to @jhauck.bsky.social and team. This is a great primer for many of the things we plan to elaborate further in #OAEMIP.
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Jens Daniel Müller @jens-d-mueller.bsky.social · 07/01/2026
🌊 New paper out assessing the potential of Ocean Alkalinity Enhancement (OAE) to mitigate the impacts of ocean acidification on marine calcifiers doi.org/10.1021/acs....
doi.org
Substantial Limitations of Ocean Alkalinity Enhancement in Mitigating the Negative Impacts of Ocean Acidification on Marine Calcifiers
Ocean Alkalinity Enhancement (OAE) is increasingly considered as a marine carbon dioxide removal (mCDR) strategy with the potential cobenefit of mitigating ocean acidification (OA), but this remains p...
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Jens Daniel Müller @jens-d-mueller.bsky.social · 26/11/2025
🌊
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Jens Daniel Müller @jens-d-mueller.bsky.social · 26/11/2025
Want to understand how the world’s first carbon credits for ocean alkalinity enhancement were issued? Anna Madlener — one of the new colleagues I’m extremely excited to work with at the Carbon to Sea Initiative — has you covered: www.carbontosea.org/2025/11/25/a...
carbontosea.org
The First OAE Credits: An Independent MRV Review - Carbon to Sea Initiative
Carbon to Sea’s MRV Blog Series: This is the second installment in Carbon to Sea’s monitoring, reporting, and verification (MRV) blog series. I’m Anna Madlener, Senior Manager for MRV at Carbon to Sea...
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Jens Daniel Müller @jens-d-mueller.bsky.social · 13/11/2025
🚨 The Global Carbon Budget 2025 has just been released and I actively contributed for the first time 😍
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Jens Terhaar @polarocean.bsky.social · 02/10/2025
Future atmospheric and ocean warming over the 21st century might be larger than previously expected based on a new study by @linusvogt.bsky.social Linus & I developed the idea during Linus research visit with me at @whoi.edu and turned it then into this paper: esd.copernicus.org/articles/16/...
esd.copernicus.org
Increased future ocean heat uptake constrained by Antarctic sea ice extent
Abstract. The ocean takes up over 90 % of the excess heat stored in the Earth system as a result of anthropogenic climate change, which has led to sea level rise and an intensification of marine extre...
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Danai Filippou @danaifilippou.bsky.social · 24/07/2025
Call for #abstracts – Ocean Sciences Meeting 2026 🌊 📅 February 22–27, 2026 📍 Glasgow, Scotland We are excited to announce our #OSM26 session: CC019 – Ocean uptake, transport, and storage of heat and carbon Details and submission: agu.confex.com/agu/osm26/pr... See you in Glasgow! ✨️
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Nature Portfolio @natureportfolio.nature.com · 20/09/2025
A study in Nature Climate Change shows that the ocean carbon sink unexpectedly declined in 2023 despite record-high sea surface temperatures (SSTs), primarily due to SST-driven outgassing of CO2 in the subtropics. 🌊 🧪
go.nature.com
Unexpected decline in the ocean carbon sink under record-high sea surface temperatures in 2023 - Nature Climate Change
The ocean carbon sink strengthened in previous warm El Niño years due to reduced CO2 outgassing in the tropics. Here the authors show that the ocean carbon sink declined in 2023 despite record-high sea surface temperatures (SSTs), primarily due to SST-driven outgassing of CO2 in the subtropics.
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UN Environment Programme @unep.org · 20/09/2025
History made for the ocean: #BBNJ Agreement enters into force, protecting high seas & deep seabed, safeguarding life under water. “Our ocean is the foundation of our very existence. Today we took an important step forward to save our ocean, & to save our future” - ED @ingerandersen.bsky.social
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Lennart Bach @bachlennart.bsky.social · 19/09/2025
1/n This study led by @aaronferderer.bsky.social tested how 5 diatom species respond to broad ranges of seawater carbonate conditions. Goal was to determine carbonate chemistry niches and to inform Ocean Alkalinity Enhancement (OAE) and Ocean Acidification (OA) 🌊 www.science.org/doi/10.1126/...
science.org
Carbonate chemistry fitness landscapes inform diatom resilience to future perturbations
Diatom growth rates are determined by concentrations of CO2 and H+ across broad carbonate chemistry landscapes.
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Jens Daniel Müller @jens-d-mueller.bsky.social · 16/09/2025
🌊 Very exciting opportunity in ocean physics!
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Jens Daniel Müller @jens-d-mueller.bsky.social · 15/09/2025
🚀 Exciting next step: I’ll soon start as a Research Fellow at Carbon to Sea! 🌊
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Ruth Mottram @ruthmottram.eurosky.social · 09/09/2025
Round 1 of the second science seminar for #AntarcticaInSync - an international collaboration aiming at advancing research of all kinds in Antarctica + the Southern Ocean. Fear not if you missed it, there is another chance Wednesday at 15:00 UTC www.antarctica-insync.org/2nd-antarcti...
antarctica-insync.org
2nd Antarctica InSync International Science Webinar - event - Antarctica Insync
Join us for a dynamic online workshop to advance the scientific planning of Antarctica InSync, an international initiative endorsed by the UN Ocean Decade. Aiming for a circumpolar assessment of Antarctica and the Southern Ocean, the initiative explores the links ... Read more
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Jens Daniel Müller @jens-d-mueller.bsky.social · 04/09/2025
Every measurement matters 👏👇
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Galen McKinley @oceancarbon.bsky.social · 04/09/2025
news.climate.columbia.edu/2025/09/04/t... We've had a new analysis published on the impact on the ocean carbon sink from the unprecedented ocean warming of 2023.
news.climate.columbia.edu
The Ocean Carbon Sink Is Ailing
Measurements analyzed by an international research team indicate the global ocean absorbed significantly less CO₂ than anticipated during the unprecedented marine heatwave in 2023.
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Reposted by Jens Daniel Müller
Pierre Friedlingstein @pfriedling.bsky.social · 02/09/2025
Great news study of the global ocean carbon sink response to the 2023 warming conditions
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Jens Daniel Müller @jens-d-mueller.bsky.social · 02/09/2025
🌊 In 2023, the ocean carbon sink weakened for the first time in a record-hot year 🌡️🌎 Our new study in Nature Climate Change quantifies this unexpected decline and explains how it came about. 👇 doi.org/10.1038/s415...
doi.org
Unexpected decline in the ocean carbon sink under record-high sea surface temperatures in 2023 - Nature Climate Change
The ocean carbon sink strengthened in previous warm El Niño years due to reduced CO2 outgassing in the tropics. Here the authors show that the ocean carbon sink declined in 2023 despite record-high se...
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Carlos Moffat @carlosmoffat.com · 29/08/2025
🌊With the Fall semester upon us, it's time to start thinking about recruiting/applying to grad school for 2026. If you are a marine scientist looking for a graduate student, I've created a form where you can add your name and other info: docs.google.com/forms/d/e/1F... Please share widely! (1/2)
docs.google.com
Oceanography MS/PhD Positions for Fall 2026
This is an effort to collect the **contact information of potential advisors** for MS/PhD students in Oceanography. Please note that if you answer **you are agreeing to have your contact information...
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Jens Daniel Müller @jens-d-mueller.bsky.social · 01/09/2025
Crazy how time flies: Five years of being a Postdoc, and now already five months since not being a Postdoc anymore in the fabulous @upgroup.bsky.social at @usyseth.bsky.social.
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Giulia Faucher @giuliafaucher.bsky.social · 17/08/2025
… a few more days to submit your abstract to this wonderful session 🙃 on mCDR 😉 at OSM26 🌊 Biogeochemical and Ecological Insights for Evaluation of Marine Carbon Dioxide Removal (mCDR) agu.confex.com/agu/osm26/pr...
agu.confex.com
Biogeochemical and Ecological Insights for Evaluation of Marine Carbon Dioxide Removal (mCDR)
Marine carbon dioxide removal (mCDR) encompasses several ocean-based strategies to sequester atmospheric CO2 in the ocean to mitigate anthropogenic climate change. With a growing interest in chemical ...
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Prof Ian Hall @ianhall.bsky.social · 13/08/2025
🌊 Journalists: the ocean needs your voice. Apply now to the @pulitzercenter Ocean Reporting Network & spend a year investigating the ocean stories that can change our planet’s future. e.g. deep-sea mining, marine energy, CO2 removal or polar issues pulitzercenter.org/blog/journal...
pulitzercenter.org
Journalism That Goes Deep: Applications Open for Ocean Reporting Fellowships
Image Applications are now open to join the third cohort of the Ocean Reporting Network (ORN), a fellowship program that gives professional journalists the opportunity to spend up to a year working on...
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Steph Henson @stephhenson.bsky.social · 08/08/2025
🌊 I’m hiring! Research Scientist in Marine Ecology & Machine Learning at the National Oceanography Centre, Southampton (UK). Got experience with machine learning techniques applied to marine ecology, biogeochemistry or climate change? Apply by 5 September! careers.noc.ac.uk/vacancy/rese...
careers.noc.ac.uk
Careers | National Oceanography Centre
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Jana Härri @janahaerri.bsky.social · 29/06/2025
🌊 Surprisingly stable: nitrous oxide emissions only vary by 17% during ENSO events in the Eastern Tropical Pacific. In our new preprint, we identify the mechanism behind the limited variability — and discuss the importance of this mechanism in the future. 🌎 🔗 Read more: doi.org/10.22541/ess...
doi.org
Impact of ENSO on Nitrous Oxide Emission in the Eastern Tropical Pacific
Nitrous oxide (N2O) is a powerful greenhouse gas, with the ocean contributing ~4.2 Tg N y-1 to global N2O emissions. The Eastern Tropical Pacific (ETP) is a hotspot of N2O emissions due to high N2O pr...
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Scott Doney @scottdoney.bsky.social · 04/06/2025
New report released today on marine carbon dioxide removal #OOSC covering scientific, MRV, environmental, social & governance issues and role of governments in responsible #mCDR R&D 🌊 High Level Panel for a Sustainable Ocean Economy & WRI oceanpanel.org/publication/...
oceanpanel.org
Principles for responsible and effective marine carbon dioxide removal development and governance - Ocean Panel
Launched on June 4, 2025, at the One Ocean Science Congress in Nice, France, ahead of the United Nations Ocean Conference, this Blue Paper was
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Jens Daniel Müller @jens-d-mueller.bsky.social · 15/05/2025
🌊 New preprint online establishing a catalog of ocean carbon data products. 🎯 Our hope is to ease user access to the highly diverse compilation of available datasets. ❓️If you have ideas on how we can further improve toward this goal, or if you spot any missing data products, please reach out.
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The Coral Reef Research Hub @coralreefresearch.bsky.social · 13/05/2025
CORAL PHD OPPORTUNITY: Dissolution of cold-water corals in a changing ocean (Heriot-Watt University, UK) www.findaphd.com/phds/project... #coralreefs #coldwatercorals #phd #phdopportunity #coralphd #coral #careers #careerdevelopment #oceanacidification #marinebiology
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Dr. Jessica N. Cross @jessicancross.bsky.social · 12/05/2025
🚨 PNNL is Hiring 🚨 Join us in Sequim, WA as our PNNL Marine Ops Manager: careers.pnnl.gov/jobs/10671?l... a 2nd position in a lab ops setting is here: careers.pnnl.gov/jobs/10661?l...
careers.pnnl.gov
Marine Operations Program Manager in Sequim, Washington | Pacific Northwest National Laboratory
PNNL is hiring a Marine Operations Program Manager in Sequim, Washington. Review all of the job details and apply today!
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Jens Daniel Müller @jens-d-mueller.bsky.social · 12/05/2025
Alban Planchat is working on the enhancement of the ocean carbon sink through coral dissolution, and I was asked to share my opinion for a news article in @science.org by @elisecutts.bsky.social 👇 🌊 #OAE #mCDR
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Judith Hauck @jhauck.bsky.social · 01/05/2025
Today at #EGU25:
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Jens Daniel Müller @jens-d-mueller.bsky.social · 30/04/2025
🌊 #EGU25
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INSTAAR @instaar.bsky.social · 29/04/2025
A new ocean modeling study by HOLLY OLIVAREZ, NICOLE LOVENDUSKI, et al. suggests that recent slowdowns in carbon absorption may be due to natural variability instead of global warming. But a definitive answer requires more frequent & wider sampling of ocean chemistry www.colorado.edu/today/2025/0...
colorado.edu
The ocean may be absorbing less carbon, but it may not be due to climate change—yet
The ocean has absorbed about 30% of carbon dioxide emissions from human activities since the Industrial Revolution, significantly slowing the pace of climate
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Jens Daniel Müller @jens-d-mueller.bsky.social · 28/04/2025
Good morning #EGU25! Do you want to know what the record high sea surface temperatures did to the ocean carbon sink? Come and see me after the coffee break (11:35) in Room C: meetingorganizer.copernicus.org/EGU25/EGU25-...
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Ana Bastos @anabastos.bsky.social · 28/04/2025
My #EGU25 starts w/ a session on global budgets and drivers of greenhouse gases with solicited talks by @jens-d-mueller.bsky.social on the ocean sink under record high SST in 2023/4 Santiago Botía on what it meant for the drought in South America and land sink in the Amazon, Cerrado and Caatinga
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Goulven Laruelle @goulven-laruelle.bsky.social · 27/04/2025
🌊Off to Vienna for my first EGU since 2017! If you're there, please, drop by room 2.23 on Friday at 14h for my talk 'Towards sustainable nutrient management along the Land-Sea continuum, an integrated modeling perspective!' meetingorganizer.copernicus.org/EGU25/EGU25-... #EGU25
Introduction slide for a presentation called 'Towards sustainable nutrient management along the Land-Sea continuum, an integrated modeling perspective!'
The slide displays the title and the list of authors (G Laruelle, A. Casquin, M. Silvestre, A. Capet, P. Regnier, V. Thieu) over a background representing the coastal ocean. The slide also includes logos of different institutions (FNRS, Sorbonne University, Université Libre de Bruxelles), laboratories (BGEOSYS and METIS) and funding agency (OFB: Office Français de la Biodiversité) as well as one representing the name of the project: Nuts_STeauRy.
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Jens Daniel Müller @jens-d-mueller.bsky.social · 27/04/2025
🌊
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Dr. Alizée Roobaert 🐠 @roobaertalizee.bsky.social · 24/04/2025
1/3🌊 #EGU25 next week ! Come to my talk on our #SOCOMv2 work: strengths & limits of pCO₂ interpolation products to estimate the ocean carbon sink ➡️ Understand biases & uncertainties from data sparsity, mapping methods & CO₂ flux 📅 Mon 28 Apr | ⏰ 11:55 | 📍 Room C #OceanCarbon #EGU2025
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Ana Bastos @anabastos.bsky.social · 24/04/2025
Attending #EGU @egu.eu & care about mental health & diversity in academia? Join our Union Symposium Monday, 16:15–18:00 in Room E1. Co-organized with @polarocean.bsky.social @geocarolina.bsky.social Sabine Hörnig and Anita Di Chiara. Read more on @lucialayr.bsky.social blog post @egubg.bsky.social
blogs.egu.eu
Highlighted event: Opening up about Mental Health across Career Stages in the Geosciences
EGU 2025 is almost upon us! While a highlight of the year for many scientists, a big conference like this can also come with feelings of stress or anxiety for many. (If that’s you – you are not alone!...
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Thibault Guinaldo @tguinaldo.bsky.social · 16/04/2025
🌊 The N.Atlantic has been experiencing extreme T°C in 2023. This situation raises a number of questions: Have we missed something? Do climate models allow us to understand such an event, or have we entered a new climate regime? We attempted to answer these questions in this study: rdcu.be/eh0e8 1/14
rdcu.be
Internal variability effect doped by climate change drove the 2023 marine heat extreme in the North Atlantic
Communications Earth & Environment - The 2023 North Atlantic marine heatwave was driven by an extreme phase of internal atmospheric variability but would have been impossible without the doping...
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Glen Peters @glenpeters.bsky.social · 14/04/2025
A record increase in the global average atmospheric CO2 in 2024, 3.75 parts per million (previous record was 2.96ppm). The global average is more representative than Mauna Loa, as it is the average of numerous stations located around the world. gml.noaa.gov/ccgg/trends/... 1/
Annual increase in atmospheric CO2 in the marine boundary layer (global average). The bars steadily rise from 1960, with quite some interannual variability, but then 2024 is way above all other years (25% higher than the previous record).
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Scott Doney @scottdoney.bsky.social · 26/03/2025
I am presenting a seminar online next Monday at 2pm ET on Marine Carbon Dioxide Removal in the University of Maryland, Earth System Science Interdisciplinary Center seminar series. Details on a talk, and abstract and web link for the webinar available from go.umd.edu/doney 🌊 #climate #UVA
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European Geosciences Union (EGU) @egu.eu · 03/03/2025
Hello Bluesky! EGU is pleased to be able to activate our account here, and share all the exciting news about the upcoming General Assembly: #EGU25, our #OpenAccess publications and more! Several of our Divisions will be making the move over from Twitter/X too, so keep an eye out for your favourites!
Blue background with yellow EGU logo and text that reads "European Geosciences Union".
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