Maurício Santos-Andrade

We need a global assessment of avoidable climate-change risks To understand the urgency of emissions reductions, policymakers and citizens need a full analysis of what is at stake.

We need more than IPCC: The IPCC is crucial for assessing climate-change science but is a politically-constrained summary of ONLY the most inarguable core of the science. A GLOBAL RISK ASSESSMENT is needed to clarify the real range of risks & priorities for action.

www.euronews.com/2026/02/27/t...

💶 The @sedimentology.bsky.social sponsors the 5dwc with travel grants for IAS student members. If you would like to join, submit your abstract and your travel grant application as soon as possible because there is a limited amount of travel grants. More info 👇

www.marum.de/en/5th-Deep-...

Concerned about the Point of No Return? Today we published a paper on the risk of a hothouse Earth trajectory. You can read it here: authors.elsevier.com/c/1mbW49C~Iu...

A global analysis of pollen-based reconstructions of land climate changes during Dansgaard–Oeschger events Abstract. Dansgaard–Oeschger (D–O) warming events are comparable in magnitude and rate to the anticipated 21st century warming. As such, they provide a good target for evaluation of the ability of sta...

🌡️ Climate of the Past

Pollen reconstructions during DO-events doi.org/10.5194/cp-2...
Carbon pathways driven by arc-continent collision doi.org/10.5194/cp-2...
Past Ocean density from foraminifera δ18O doi.org/10.5194/cp-2...
10,000 years of avalanche activity in W Norway doi.org/10.5194/cp-2...

Global and regional Pleistocene benthic δ18O stacks with a comparison of different age modeling strategies Abstract. Constructing accurate age models for Pleistocene marine sediments is crucial for our understanding of glacial-interglacial cycles and other climatic processes. Benthic foraminiferal δ18O sta...

A suite of benthic δ18O stacks intended as updates to the LR04 has been published. We compiled new data, updated the chronology, and provided regional stacks. gchron.copernicus.org/articles/8/8...

Paleotemperatures through the Phanerozoic and the variation of measurement densities through time.

I'm glad to share our new study on the nature of distributions of gaps in empirical geochronologies of geological section as a function of time scale. Measurements of proxies are highly uneven if measured through time.
1/5
 www.nature.com/articles/s43...

🧪 #Geology ⚒️ #Paleobio #EvoBio

Zonally asymmetric changes in the Antarctic Circumpolar Current strength over the past million years - Nature Geoscience Anti-phased changes in Antarctic Circumpolar Current strength between the Indian and Pacific sectors of the Southern Ocean occurred on orbital timescales over the past one million years, linked to gla...

⚒️ Article: Anti-phased changes in Antarctic Circumpolar Current strength between the Indian and Pacific sectors of the Southern Ocean occurred on orbital timescales over the past one million years

www.nature.com/articles/s41...

Scientist in a white lab coat and gloves working with a laboratory instrument in a modern research lab filled with equipment and a laptop.

Two researchers in cold-weather gear examining samples on a rocky, snowy slope near a body of water.

Are you a UK researcher who wants to carry out a small-scale fieldwork project at our Antarctic research stations or on board our polar research ship?

📅 Deadline for applications is 4pm, 31 March 2026

Find out more on our website: https://ow.ly/aE5Q50Y3P5O

📸 Chris Walton & Nina Kinney

Global trends in ocean fronts and impacts on the air–sea CO2 flux and chlorophyll concentrations Nature Climate Change - Changes in ocean fronts could impact biological productivity and carbon exchange. By analysing satellite and reanalysis data, the authors identify areas with active frontal...

Researchers tracked where ocean fronts occur globally and how they're changing.

"We can now directly link changes in frontal activity to changes in both phytoplankton biomass and ocean carbon dioxide uptake" — Dr Amelie Meyer @imas-utas.bsky.social

@nature.com ▶️ rdcu.be/e0RHf

Marine Snow Grows Faster and Fluffier as It Sinks - Eos New observations highlight how abiotic and biotic processes influence the tiny oceanic particles.

Marine Snow Grows Faster and Fluffier as It Sinks eos.org/research-spo...

Relatively warm deep-water formation persisted in the Last Glacial Maximum - Nature During the Last Glacial Maximum, the deep Northwest Atlantic was only about 2 °C colder than today, suggesting sustained production of relatively warm North Atlantic Deep Water during the Last Glacial...

🌊 Relatively warm deep-water formation persisted in the Last Glacial Maximum

www.nature.com/articles/s41...

✨New GEOTRACES Science Highlight! ✨ 🌊

Conservative behavior of radiogenic neodymium isotopes in the South Pacific interior
👉 www.geotraces.org/conservative...

Paper first author: Zhouling Zhang @geomarkiel.bsky.social

@scor-int.bsky.social
#OceanScience #MarineScience #Pacific #neodymium

Contrasting evolution of the Arabian Sea and Pacific Ocean oxygen minimum zones during the Miocene - Communications Earth & Environment The Arabian Sea and eastern tropical Pacific oxygen minimum zones were better oxygenated during the warm Miocene, but with regional complexities, according to analysis of trace elements and nitro...

🚨New paper out with @alexauderset.bsky.social! We show that the Arabian Sea oxygen minimum zone (OMZ) was better oxygenated during the warm Miocene Climate Optimum than today, but its path to full deoxygenation was slow and complex.
Link to paper: www.nature.com/articles/s43...

doi.org/10.1016/j.ep...

New study demonstrates conservative behaviour of seawater neodymium isotopes in the S Pacific.

Antarctic Intermediate Water Variability in the South Atlantic Over the Last 600,000 years - Soaga - 2025 - Paleoceanography and Paleoclimatology - Wiley Online Library

Reviews and syntheses: Carbon vs. cation based MRV of Enhanced Rock Weathering and the issue of soil organic carbon Abstract. We discuss the “monitoring, reporting and verification” (MRV) strategy of Enhanced Weathering (EW) based on carbon accounting and argue that in open systems such as arable land, this approac...

A comparison between alkalinity in the ocean and in soils, led by Jelle Bijma, motivated by enhanced weathering as a carbon dioxide removal method.

🌊

bg.copernicus.org/articles/23/...

#Magellan3 workshop MANI_IN_PASTA now open for registrations 📣

📍 Where: Trieste, Italy, with online hybrid participation possible.
🗓 When: Monday 11th - Wednesday 13th May 2026

Further information and registration: iodp3.org/new-magellan...

🌊 Plot of the Week! 🌊

In the NW Med, 7 active Argo floats captured the winter mixing in one of the few regions of the world where deep convection is observed.

These processes are crucial for climate regulation and are experiencing major shifts.

#OneArgo #Argofloat #Argofloats #Argo

Uni Bern: Postdoc position: Earth system model development (3 years)

✨I have a vacant 3-yr postdoc position in biogeochemical Earth system model development. If you're interested in geochemical isotopes and their use as paleoceanographic proxies, please consider applying. For any questions on the position, just get in touch✨
ohws.prospective.ch/public/v1/jo...

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...

🌊 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....

Synchronous bipolar retreat of mid-latitude ice masses during Heinrich Stadials - Nature Geoscience Glaciers in New Zealand retreated at about the same time as mid-latitude glaciers in the Northern Hemisphere during Heinrich Stadials, indicating strong global teleconnections during the last glacial ...

⚒️ Article: Glaciers in New Zealand retreated at about the same time as mid-latitude glaciers in the Northern Hemisphere during Heinrich Stadials, indicating strong global teleconnections during the last glacial period

@ifremer.bsky.social

www.nature.com/articles/s41...

🌊 Unlock the Ocean’s Hidden Chemistry!
Excited to announce #argopy 1.4.0! 🎉
Now predict nutrients (NO₃, PO₄, SiOH₄) and carbonate variables (AT, DIC, pHT, pCO₂) with CANYON-B and CONTENT models—directly from your #argofloats data. Perfect for @bgc-argo.bsky.social users !
argopy.readthedocs.io

🚨Professorship at St Andrews🚨

We are recruiting a Professor in Earth Sci (incl atmos, oceans, climate) @earthscista.bsky.social @uniofstandrews.bsky.social

Ideal candidate is a leading researcher with interests in impact/outreach. Deadline 23/3/26!

www.vacancies.st-andrews.ac.uk/Vacancies/I/...

An artist's drawing of the Ben Franklin submersible. The sub is shown with its side cut open to reveal the interior and technology of the submersible.

A temperature map of the Gulf Stream with the track of the Ben Franklin superimposed on it. Beginning on July 14, 1969 off Florida, ending on August 14 off Nova Scotia.

Wow, why have I never heard of the Ben Franklin mesoscaphe? Like human argo floats, 6 men descended to ∼600m and drifted submerged in the Gulf Stream for 30 days. Along the drift, the crew mapped seafloor properties, biology, noises, and acted as a human occupied CTD analyzing the water column.

One of the most fascinating views as an oceanographer: RRS Discovery, built in 1901.

INQUA CONGRESS 2027 The XXII INQUA Congress 2027 in Lucknow, India brings together global researchers to advance Quaternary science, climate research, geohazards, paleoenvironment studies, and human–environment interacti...

🇮🇳 Abstract submissions are open for INQUA 2027 taking place in Lucknow, India, from 28 Jan – 3 Feb 2027.
The deadline to submit an abstract is 31 January 2026.
> Visit the website for details: www.inquaindia2027.in

I’m looking for a PhD student to join my lab @ NC State starting Fall 2026!

Lots of room to develop projects, esp. around paleoceanography, ocean deoxygenation & foraminiferal ecology. Field, lab & computational angles all possible.

Please share with anyone who might be a good fit!

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.

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. 🌊 🧪

Time series of standardized streamflow anomaly for the Ganga River from year 700 to 2020 (derived from a hydrological model and from the Monsoon Asia Drought Atlas built from tree rings). The plot shows mostly balanced wet (blue/green bars) and dry (brown bars) years until the 20th century, when the black moving-average line dips sharply after 1990. The 1991–2020 mean (blue horizontal line) is well below the range of previous 1,300 years. Orange dots mark major documented historical droughts, but the recent drying is clearly the most severe.

Observed changes in precipitation and temperature between 1951 and 2020. Spatial distribution of change in (A) annual precipitation (%) and (B) annual mean temperature (°C) between 1951 and 2020 based on the Sen’s slope calculation. Grids with statistically significant trends (P <= 0.05), based on the Mann–Kendall test, are highlighted with stippling. The Inset panels in (A) and (B) represent the interannual variability in precipitation anomaly (%) and temperature (°C) averaged for the Ganga River Basin (blue boundary). The total change in average precipitation and temperature over the GRB during 1951−2020, estimated using the Sen’s slope, is statistically significant (P-value <= 0.05) based on the Mann–Kendall test.

🚨New work🚨 led by Ph.D. student Dipesh Chuphal (IIT Gandhinagar), shows that the recent drying of the Ganga River basin is unprecedented in 1,300 years—more severe than historical famines. This ~multidecadal drying appears forced, but many models do not capture it. ☔️ 🌧️

www.pnas.org/doi/10.1073/...

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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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/...