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Reposted by Alfredo Martínez García

Patrick Rafter @oceanandclimate.bsky.social · 8d

Today, we published a study long in the making on how upper and subsurface tropical Pacific waters responded (and maybe will adjust) to warmer global climate. Here’s the story of how we got here after 15 years. many authors but shout out @jfarmersalmanac.bsky.social
🌊
www.science.org/doi/10.1126/...

Persistent eastern equatorial Pacific Ocean upwelling since the warm Pliocene

Upwelling generates a nutrient-rich “cold tongue” in the eastern equatorial Pacific Ocean (EEP), with impacts on global climate, oceanic biological productivity, and the carbon cycle. The cold tongue ...

www.science.org

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Reposted by Alfredo Martínez García

Alan D. Foreman @climatearchivist.bsky.social · Jun 26

Another cool paper coming out of @amglab.bsky.social. Led by Tanja Wald, here we present basin-wide profiles of Mediterranean nitrate N/O isotopes, and show that this distribution can be explained by a combination of nitrogen fixation and anthropogenic nitrogen deposition: dx.doi.org/10.1029/2023...

Origins of the Nitrate 15N Depletion in the Mediterranean Sea

Basin-wide depth profiles of nitrate δ15N and δ18O indicate a supply of low-δ15N N to the Mediterranean Sea Nitrate δ15N can be explained by modest rates of N2 fixation and/or anthropogenic N dep...

dx.doi.org

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Reposted by Alfredo Martínez García

Jesse Farmer @jfarmersalmanac.bsky.social · Apr 18

Just published open-access in @agu.org's Paleo Paleo: A new foraminifera-bound nitrogen isotope perspective on one of geology's evergreen mysteries: The history of the Central American Seaway agupubs.onlinelibrary.wiley.com/doi/full/10.... (1/a few)...

Early Pliocene Shoaling of the Central American Seaway Reconstructed From Foraminifera‐Bound Nitrogen and Oxygen Isotopes

Foraminifera-bound nitrogen isotopes trace the early Pliocene restriction of nutrient exchange across the Central American Seaway Geochemical data indicate four phases of seaway shoaling between ...

agupubs.onlinelibrary.wiley.com

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Reposted by Alfredo Martínez García

Dr Huw Groucutt @huwgroucutt.bsky.social · Apr 9

(1/13) A thread on our new paper just published in Nature, ‘Recurrent humid phases in Arabia over the past 8 million years’. www.nature.com/articles/s41...

Recurrent humid phases in Arabia over the past 8 million years - Nature

A climatic record from desert speleothems shows that the central Arabian interior experienced recurrent humid intervals over the past 8 million years, which likely facilitated mammalian dispersals bet...

www.nature.com

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Reposted by Alfredo Martínez García

Babette Hoogakker @oceano2.bsky.social · Feb 18

A mammoth effort from all involved. Great to see this published. bg.copernicus.org/articles/22/...

Reviews and syntheses: Review of proxies for low-oxygen paleoceanographic reconstructions

Abstract. A growing body of observations has revealed rapid changes in both the total inventory and the distribution of marine oxygen over the latter half of the 20th century, leading to increased int...

bg.copernicus.org

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Alfredo Martínez García @amglab.bsky.social · Jan 18

www.lavanguardia.com/ciencia/2025...

El esmalte dental de los australopitecos demuestra que fueron vegetarianos

Los australopitecos se alimentaban esencialmente de vegetales. Quizá comían carne de forma ocasional, pero lo hacían en cantidades pequeñas. Es la conclusión a la

www.lavanguardia.com

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Alfredo Martínez García @amglab.bsky.social · Jan 18

Listen to Tina Lüdecke explaining our latest @science.org
paper investigating the diet of our ancient hominin relatives Australopithecus on the Science Podcast:

www.science.org/content/podc...

Rising infections from a dusty devil, and nailing down when our ancestors became meat eaters

On this week’s show: Climate change may be driving an expansion of Valley fever, a deadly fungal infection spread by desert-loving spores, and a look at <em>Australopithecus</em>’s diet 3 million year...

www.science.org

Alfredo Martínez García @amglab.bsky.social · Jan 18

www.reuters.com/science/meat...

Meat was not on the menu for human ancestor Australopithecus

The incorporation of meat into the diet was a milestone for the human evolutionary lineage, a potential catalyst for advances such as increased brain size. But scientists have struggled to determine when meat consumption began and who did it.

www.reuters.com

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Reposted by Alfredo Martínez García

Sophie Warken @swinnyy.bsky.social · Jan 16

Excited to share our latest research published in @science.org #ScienceAdvances! 🎉
We've discovered the Laacher See eruption 🌋 in a speleothem from Germany, which allows to synchronize European and Greenland Late Glacial climate change.

Read more: www.science.org/doi/10.1126/...

A Thread ⬇️⬇️ 1/n

Discovery of Laacher See eruption in speleothem record synchronizes Greenland and central European Late Glacial climate change

A volcanic sulfur spike links the Laacher See eruption to Greenland ice cores and synchronizes the timelines to European records.

www.science.org

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Alfredo Martínez García @amglab.bsky.social · Jan 16

Hot off the press, in a study published today in Science, we show that Australopithecus did not consume
substantial mammalian meat
www.science.org/doi/10.1126/...

Australopithecus at Sterkfontein did not consume substantial mammalian meat

Incorporation of animal-based foods into early hominin diets has been hypothesized to be a major catalyst of many important evolutionary events, including brain expansion. However, direct evidence of ...

www.science.org

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Alfredo Martínez García @amglab.bsky.social · Dec 13

You can find a link for free access to our latest Science paper (Decadal oscillations in the ocean’s largest oxygen-deficient zone) in my website (www.theamglab.com/publications)

Alfredo Martínez García @amglab.bsky.social · Dec 13

www.mpic.de/5621752/larg...

The largest oxygen-poor region of the ocean is more variable than previously thought

Analysis of nitrogen isotope ratio in skeletons shows strong decadal oscillations in the size of the world's largest oxygen-deficient zone (ODZ) over the last 80 years. These findings imply that this ...

www.mpic.de

Reposted by Alfredo Martínez García

Dr. Thomas Felis @thomasfelis.bsky.social · Dec 5

Congrats to @climatereefs.bsky.social colleague Nic Duprey of the @amglab.bsky.social on his publication in Science

Alan D. Foreman @climatearchivist.bsky.social · Dec 5

Hot off the (e-)press, a study in Science led by Nic Duprey showing that the variability of the world's largest Oxygen Deficient Zone over the last 80 years is tightly linked to Pacific Decadal Variability: www.science.org/doi/10.1126/...

Decadal oscillations in the ocean’s largest oxygen-deficient zone

The impact of global warming on the ocean’s oxygen-deficient zones (ODZs) is uncertain, partly because of a lack of data on past changes. We report monthly resolved records of coral skeleton–bound nit...

www.science.org

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Reposted by Alfredo Martínez García

Tropical Climate Variability & Coral Reefs (SPP 2299) @climatereefs.bsky.social · Dec 5

Lots of cool science on corals coming out of the @amglab.bsky.social at the moment, with #SPP2299 colleagues involved

Alan D. Foreman @climatearchivist.bsky.social · Dec 5

We've had a couple cool things come out of the lab lately, and I wanted to share. First, check out this paper from Jon Jung et al. in Nature showing geochemical evidence for coral symbiosis on Devonian reefs: www.nature.com/articles/s41...

Coral photosymbiosis on Mid-Devonian reefs - Nature

Nitrogen isotope evidence of Mid-Devonian photosymbiotic associations in certain types of corals suggests that autotrophic and heterotrophic corals co-existed on extinct reefs, as today, but in w...

www.nature.com

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Reposted by Alfredo Martínez García

Tropical Climate Variability & Coral Reefs (SPP 2299) @climatereefs.bsky.social · Dec 5

More cool science on corals coming out of the @amglab.bsky.social at the moment, with #SPP2299 colleagues involved

Alan D. Foreman @climatearchivist.bsky.social · Dec 5

Last, a set of observations detailing a massive cold-bleaching and mortality event of mesophotic reefs that we observed in 2023 onboard S/Y Acadia at Clipperton Atoll in the Eastern Tropical Pacific:

www.sciencedirect.com/science/arti...

Severe cold-water bleaching of a deep-water reef underscores future challenges for Mesophotic Coral Ecosystems

Elevated sea surface temperatures are causing an increase in coral bleaching events worldwide, and represent an existential threat to coral reefs. Ear…

www.sciencedirect.com

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Reposted by Alfredo Martínez García

Paul Zander @zanderland.bsky.social · Dec 5

Ever wanted to get just a little bit more out of your lipid extracts when measuring compound specific isotopes?

If yes, here's a new paper that might be of interested to you:

analyticalsciencejournals.onlinelibrary.wiley.com/doi/10.1002/...

with @amglab.bsky.social