Dr. Thomas Felis

YouTube video by Tropical Climate Variability & Coral Reefs SPP 2299 Research & Future Directions

The DFG Priority Programme “Tropical Climate Variability & Coral Reefs” (SPP 2299) has released a new video highlighting the programme’s current research activities and outlining upcoming scientific priorities.

Check out the new video on our YouTube channel:
youtu.be/PUQUnIhgVEk?...

Bremen, right now...

[ENSO Webinar Series] We are pleased to invite you to join us for the first webinar of the CLIVAR Pacific Region Panel’s newly launched ENSO webinar series:

January 22, 2026 | 07:00 UTC
GoTo Meeting – meet.goto.com/198838725

Scan the QR code to sign up

Check more: www.clivar.org/events/enso-...

Penultimate glacial sea surface temperature and hydrologic variability in the tropical South Pacific from 150 ka Tahiti corals Abstract. Constraining climate models under extreme boundary conditions of the past on societally-relevant timescales is complicated by a common lack of high-resolution reconstructions of sea surface ...

See our new paper lead by Ryuji Asami on fossil corals drilled at Tahiti by @ecord.bsky.social IODP Exp. 310

CP - Penultimate glacial sea surface temperature and hydrologic variability in the tropical South Pacific from 150 ka Tahiti corals share.google/2WMYl0YClhX9...

@marumunibremen.bsky.social

Sadly, since 2023, they have been bleaching and dying at an increased rate again, due to global warming causing more frequent and severe marine heatwaves. This is the topic of the DFG Priority Programme "Tropical Climate Variability & Coral Reefs @climatereefs.bsky.social. Now I'm back to the topic

Some AI suggested that I shouldn't always post about corals and climate. So I'll give this a try: Christmas market in Bremen 2025

Equatorial upwelling of phosphorus drives Atlantic N2 fixation and Sargassum blooms - Nature Geoscience High near-surface nitrogen-fixation rates that promoted the recent growth of the Great Atlantic Sargassum Belt were tied to greater upwelling of phosphorus from the equatorial Atlantic, according to c...

Check out our latest work, led by Jon Jung, Ph.D. student in the @amglab.bsky.social at @mpic.de:

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

Here we show that the supply of excess phosphorous from accounts for the majority of observed Sargassum variability since 2011.

🌊 🧪 #Paleosky #CoralReefs

The driver of Sargassum blooms in the Atlantic Ocean

The driver of Sargassum blooms in the Atlantic Ocean:
Upwelling of phosphorus-rich deep water promotes an N-fixing symbiont of the Sargassum algae giving it a competitive advantage.

👉https://tinyurl.com/br5drzux

#SargassumBlooms #ClimateResearch #MarineScience #MPIChemie #EnvironmentalScience 🌎

Excited to share our work using #aDNA to reconstruct #Symbiodiniaceae dynamics from #coral cores. Led by José Grillo, @jessireichert.bsky.social, @nessatir.bsky.social part of #TaraPacific expedition & supported by #SPP2299 @climatereefs.bsky.social

doi.org/10.1111/gcb....

Thanks to everyone who joined our Meeting & Status Seminar 2025 - It was such a mix of minds and experiences. It was not just about presentations - It was about connecting ideas, perspectives, and people. Events like this remind us why we do research: To explore, to question, and to grow - Together

Next talk by Mandy Freund @climatefreund.bsky.social about "ENSO during the past millennium"

Next talk by Iliana Baums @ibaums.bsky.social on "Reconstructing historical population dynamics of corals"
@hifmb.de
@marumunibremen.bsky.social

Ben Henley @benhenley.bsky.social kicking off the 3rd day of the #SPP2299 "Meeting & Status Seminar 2025" with a keynote on "Heighest ocean heat in four centuries places Great Barrier Reef in danger"
@marumunibremen.bsky.social
@dfg.de

Last keynote for today by Sara Sanchez on "Data assimilation with coral d18O"

Ed Hathorne @edhathorne.bsky.social advertising the new coral reference material "Ishi-B SPP2299"
Find out more at www.spp2299.tropicalclimatecorals.de/ishi-b-spp22...

First keynote of today by Caroline Ummenhofer on "Indo-Pacific climate variability of the last millennium"

The afternoon session is starting with an Invited Early Career Researcher Talk by Xuefei Chen from Guangzhou Institute of Geochemistry on "Paleoclimate and biological responses from South China Sea corals"

Chris Voolstra @reefgenomics.bsky.social kicking off the 2nd day of the #SPP2299 "Meeting & Status Seminar 2025" with a Perspective Lecture on "The future of reefs and reefs of the future"

Second keynote of today by Alyssa Atwood on "An updated last millennium ENSO reconstruction from the central equatorial Pacific"

First Keynote at #SPP2299 "Meeting and Status Seminar 2025" by Andrea Grottoli @andreagrottoli.bsky.social on "Leveraging coral biology, technology, and research networks to save coral reefs" in Bremen

@marumunibremen.bsky.social

Next to presentations from 18 #SPP2299 projects, we have an impressive line-up of keynote speakers, including Andrea Grottoli, Alyssa Atwood, Caroline Ummenhofer, Sara Sanchez, Ben Henley, Christian Voolstra, as well as other excellent talks from our invited guests incl. Xuefei Chen and Mandy Freund

We are excited about the "Meeting & Status Seminar 2025" of the @dfg.de #SPP2299 Priority Programme "Tropical Climate Variability & Coral Reefs", which starts Monday at @unibremen.bsky.social. 55 researchers, from 15 German institutions and international guests, will discuss latest research results

PAPER ALERT - New #SPP2299 publication by Andrew Dolman: Temperature Variability on Coral Reefs Versus Gridded SST – The Long and the Short of It - Dolman - 2025 - Geochemistry, Geophysics, Geosystems - Wiley Online Library agupubs.onlinelibrary.wiley.com/doi/10.1029/...

Check out our new blog on our website: Why Early Career Researcher Mobility Matters: Reflections from SPP 2299 www.spp2299.tropicalclimatecorals.de/2025/08/20/w...
written by @jannhargreaves.bsky.social. The focus is on young scientists gaining knowledge about crucial steps for their future careers

Need to calibrate your δ18Osw-based proxies, but can't find the right data? We've got you, FAIR! Check out our new @pages-ipo.bsky.social seawater δ18O database preprint at ESSD! (With Alyssa Atwood, @thomasfelis.bsky.social, @kimcobb.bsky.social, and more!) 🌊🧪

essd.copernicus.org/preprints/es...

Thomas Westerhold of @marumunibremen.bsky.social giving the last keynote at #ICP15 in Bangalore (India) right now

#SPP2299 members @eleniwater.bsky.social & @edhathorne.bsky.social gave exciting plenary talks at #ICP15 in Bengaluru (India), reflecting the diverse expertise in our program. Coordinator @thomasfelis.bsky.social presented the poster "Connecting Science & Society" to the paleoceanographic community

A photograph inside the JD Tata Auditorium in Bengaluru on the Indian Institute of Science campus—the photograph shows a large number of people seateed in the auditorium with Dr. Thomas Chalk (CEREGE) on stage showcasing a slide on CO₂ reconstructions.

This week, I am grateful to be at the International Conference on Paleoceanography #ICP15. Great start this morning with a tour of #Boron isotopes & #Cenozoic CO₂ reconstructions from @eleniwater.bsky.social & @chalkyoceans.bsky.social. Nice to see all the paleoceanographers in #Bengaluru!

If the pub shows a livestream of the inside of a volcanic crater and the road signs look like this, then I must be in Hilo, Hawaii

Jody Webster & Christina Ravelo kicking off the IODP Exp. 389 2nd post-cruise meeting at Hilo, Hawai'i right now

@ecord.bsky.social