Maurício Santos-Andrade
@mausanand.bsky.social
Diving into the ancient seas where dinosaurs and mammoths once swan | 🌈 Palaeoceanographic world/proxy development/trace elements in forams 🌊
📜📜 Led by P. Saravanan, we have a new paper out that shows how changing Holocene #monsoon winds shaped mixed-layer #ocean dynamics in the Arabian Sea 🌊 🔨 As early-to-late Holocene Indian summer monsoon winds weakened, they churned the Arabian Sea less and less... 🧵 www.nature.com/articles/s43...
Arabian Sea stratification and deoxygenation driven by weakening monsoon winds over the Holocene - Communications Earth & Environment
Weakening of the Indian summer monsoon and surface warming during the mid-Holocene strengthened upper ocean stratification and reduced ventilation in the Arabian Sea, according to sea-surface temperat...
nature.com
Today is #ShowYourStripes day! This year, St Michael's Tower atop Glastonbury Tor is encouraging everyone to use the Climate Stripes to start a conversation about climate change and the actions they are taking. Thank you @nationaltrust.org.uk! Graphics: www.ShowYourStripes.info
Ocean acidification damages coral reefs. CO2 is bad for corals. About a decade ago, we did the first (and the only?) experiment where CO2 was added to ocean water flowing over a coral reef, and the ecosystem response was measured without artificial confinement. www.nature.com/articles/nat...
Carbon dioxide addition to coral reef waters suppresses net community calcification - Nature
In situ carbon dioxide enrichment experiments show that ocean acidification poses a threat to coral reefs by reducing the saturation state of aragonite and the concentration of carbonate ions and that...
nature.com
✨New GEOTRACES Science Highlight! ✨ 🌊 Authigenic radiogenic neodymium isotope composition traces millennial-scale overturning circulation variability in the Arabian Sea www.geotraces.org/authigenic-r... Paper first author: Sayantan De, CSIR-NIO @scor-int.bsky.social #OceanScience #marinescience
Here, www.sciencedirect.com/science/arti... we show that care is needed with the heavily crusted N. pachyderma, as the main shell and thick crust show different geochemistries and different sensitivities to environmental change. This is crucial to palaeo-reconstructions where %crust varies.
Laboratory-grown crust in planktic foraminifera Neogloboquadrina pachyderma; insights into resolving inaccuracies in polar palaeotemperature estimates
Proxy based records of past changes in the polar ocean-cryosphere-climate system can provide invaluable constraints on ongoing and future climate chan…
sciencedirect.com
The final, peer-reviewed paper is now available. Don't forget to update your citations. 🧪🌊🦑 #UNOceanDecade @carbonbrief.org @usocb.bsky.social @pfriedling.bsky.social @jhauck.bsky.social doi.org/10.5194/essd...
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...
doi.org
Pierre Friedlingstein@pfriedling.bsky.social · 9mo agoPublished today in Earth System Science Data: The Global Carbon Budget 2025 essd.copernicus.org/preprints/es...
🌊 Antarctica and the sea ice of the Southern Ocean is a beating heart at the centre of our global #climate system. Stay in touch with #Antarctic #science via our quarterly newsletter 'Southern Signals'. Please sign up at aappartnership.org.au/contact-us/ to receive yours by email. 🌏 Pat Wongpan
✨ Applications are open for the GEOTRACES Early Career Scientist (ECS) Committee! ✨ 🌊 Apply by 3 July 2026: www.geotraces.org/2026-ecs-call/ Help lead and support the next generation of GEOTRACES activities! #EarlyCareerScientists #MarineSciences @scor-int.bsky.social @unoceandecade.bsky.social
The Amazon rainforest could be at a tipping point go.nature.com/4dVqWvY
Robust projections of risks to the Amazon rainforest
Amazonian deforestation is altering atmospheric moisture transport; as a result, even low levels of global warming could trigger dieback of most of the remaining forest.
go.nature.com
🌊 @globaloceanbgc.bsky.social GO-BGC float of the month. El Niño is coming. The 2023/24 event is clear in the @bgc-argo.bsky.social record. The white, 29C contour outlines anomalies in pCO2, NO3, chlorophyll and particulate organic carbon. Those white contours are emerging again. Stay tuned.
Interested in developing your skills in #topographic analysis? Join us in this two-part webinar series by EGU Geomorphology Division. During this #webinar, you will learn how to address scientific problems by using TopoToolbox. 📆: 2 June 2026! 👉: egu.eu/2LPGCJ 📸: Ryan Teuling on #imaggeo
🚨🌋❄️Delighted to share our paper identifying Newberry Pumice tephra in Greenland ice at 686 CE, and investigating other 7th Century eruptions associated with climate cooling is now available online in Quaternary Science Reviews. 🌋❄️🚨 doi.org/10.1016/j.qu...
Redirecting
doi.org
🌊 Review: Transitions of the Atlantic Ocean circulation www.nature.com/articles/s42...
Transitions of the Atlantic Ocean circulation - Nature Reviews Physics
The multistable dynamics of the Atlantic Ocean circulation pose a central problem in climate physics, because instabilities of the flows can have large climate impacts. This Review uses a dynamical sy...
nature.com
Ice core water-isotope records from eight locations in Antarctica spanning 400,000 years show that the warmest parts of the continent have had the most temperature variability. In PNAS: https://ow.ly/OmwB50YZOhp
🌊 GEOTRACES Online Seminar #2 Topic: Trace metal input in polar environments 📅 26 May 2026 | 🕒 15:00 CEST | 💻 Zoom 🔗 geomar-de.zoom-x.de/j/6365773349... 🎤 Talks by Jon Hawkings & Laramie Jensen Moderator: Stanley Tian Join us & spread the word! @scor-int.bsky.social @unoceandecade.bsky.social
🌡️ Climate of the Past (CP) Cont. Devonian anoxia responses to astronomical forcing doi.org/10.5194/cp-2... Caucasus temperatures reveal volcanic and industrial impacts doi.org/10.5194/cp-2... 🕑 Geochronology (GChron) Paired 14C–10Be exposure ages from W Antarctica doi.org/10.5194/gchr...
Spatially contrasted response of Devonian anoxia to astronomical forcing
Abstract. The Devonian period, spanning from 419 to 359 million years ago, was marked by a warmer-than-present climate and recurring ocean anoxic events, with evidence increasingly suggesting a link b...
doi.org
Applications are now open for the PAGES ECN Mentorship Programme! We are inviting: 🔹 Early-career researchers seeking mentorship 🔹 Mentors interested in supporting the next generation of paleoscientists 📅 Deadline: 14 June 2026 Apply here- docs.google.com/forms/d/e/1F...
PAGES ECN Mentorship program- Registration form
The PAGES ECN Mentoring Program connects early-career researchers (ECRs) with mentors from the global PAGES community to support career development, skill building, and networking. The programme typic...
docs.google.com
New paper alert 🗣️ Bioerosion Drill Holes Increase Carbonate Dissolution in the Planktonic Foraminifer Globigerinoides ruber agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Bioerosion Drill Holes Increase Carbonate Dissolution in the Planktonic Foraminifer Globigerinoides ruber
Bioeroded planktonic foraminiferal tests are more susceptible to dissolution, particularly those with multiple and larger drill holes Assessing dissolution effects through specimen size and quali...
agupubs.onlinelibrary.wiley.com
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.
Out in Nature Communications doi.org/10.1038/s414... by Lu et al. 2026. Find out about Complex marine ecological response during the Eocene-Oligocene revealed by global foraminiferal record
New mCDR paper out. This one was years in the making and supported by so much of our extended community. 80 coauthors!
Monitoring, reporting, and verification of marine carbon dioxide removal: Exploring scientific consensus and divergences across continents
Marine Carbon Dioxide Removal (mCDR) approaches are increasingly considered for climate change mitigation as a supplement to rapid emissions reduction. However, it is still unclear if mCDR approaches ...
online.ucpress.edu
Four new international Working Groups launched by the Past Global Changes (PAGES) bring together global expertise in paleoclimate science. 🌍 Read an article about these working groups and where some of the leaders come from. Read article 👉 pastglobalchanges.org/news/138887
Ancient ocean oxygen left green bands on the seafloor Million-yr records reveal sediment bands formed as deep waters re-oxygenated after low-O2 phases during Pleistocene glaciations; a hidden archive of Earth’s breathing Our new IODP EXP361 paper 👇 agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Environmental Controls on Green Bands in Marine Sediments
In the modern ocean, the appearance of dark colored diagenetic bands is associated with high bottom water oxygen At two core sites in the path of North Atlantic Deep Water, green bands are found ...
agupubs.onlinelibrary.wiley.com
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...
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.
nature.com
💶 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-...
Registration
marum.de
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...
🌡️ 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...
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...
doi.org
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...
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...
gchron.copernicus.org
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
