Dr. Tripti Bhattacharya

Postdoctoral Research Associate - Earth, Environmental, and Planetary Sciences Position Summary The Climate and Paleoclimate Lab in the Department of Earth, Environmental, and Planetary Sciences at WashU in St. Louis seeks a Postdoctoral Research Associate in tropical climate/pa...

We're hiring! I'm recruiting a Postdoctoral Research Associate in climate & paleoclimate modeling of the tropical Americas. Come obsess over the tropical rain belt with me! :) Please share w/folks who may be interested. Ad here: wustl.wd1.myworkdayjobs.com/en-US/Extern...

Landscape-wide cosmogram built by the early community of Aguada Fénix in southeastern Mesoamerica The cosmogram of Aguada Fénix built over the landscape between 1050 and 700 BCE rivaled the extents of later Mesoamerican cities.

The design and layout of an ancient Maya site, built without compulsory labor, reflects how the Maya conceived of the universe.

Learn more in #ScienceAdvances: https://scim.ag/4nANWTx

Cosmic dust reveals dynamic shifts in central Arctic sea-ice coverage over the past 30,000 years Arctic sea-ice loss affects biological productivity, sustenance in coastal communities, and geopolitics. Forecasting these impacts requires mechanistic understanding of how Arctic sea ice responds to ...

Huge paper for the Arctic Ocean published today in @science.org - a new 30,000 year history of Arctic Ocean sea-ice cover reconstructed from the accumulation of cosmic dust-derived helium-3! www.science.org/doi/10.1126/... (1/n)

Miocene and Pliocene ice and air from the Allan Hills blue ice area, East Antarctica | PNAS Antarctic ice cores provide a unique archive of Earth’s atmosphere and its largest extant ice sheet. The oldest continuous ice core extends back 80...

Amazing COLDEX.org results - 6Million year old ice, with bubbles of old atmosphere. Thank you ice, for the stories you share about our planet and its climate. Led by Sarah Shakleton #glaciology #womeninstem #cryosphere #Antarctica

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

news.oregonstate.edu/news/six-mil...

I’m actually not a historian (I do climate/earth science) - but congrats to whoever you intended to tag!

🚨 New paper: Who climbs the Ivory Tower? 🏛️ Together with Nicolai Borgen and Astrid Sandsør (@astridsandsor.bsky.social), we find that the chances of becoming a professor differ enormously by family background. Here’s what we find 👇

journals.sagepub.com/doi/full/10....

Marine heatwaves modulate food webs and carbon transport processes - Nature Communications A decade of BGC-Argo and plankton records shows North Pacific heatwaves reshape food webs and trap small particles in midwater, slowing deep-ocean carbon export. Impacts vary by event, underscoring the need for sustained ocean monitoring.

🌊 Marine heatwaves modulate food webs and carbon transport processes

In 2015 & 2019, POC ⬆️ in the NE Pacific, but instead of sinking, tiny particles lingered mid-depth, cutting carbon sequestration

Ecosystem responses vary, and long-term ocean monitoring is crucial

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

Despite congressional threat, National Academies releases new climate report Things have changed since 2009: We’re more certain about the problems.

National Academies of Science panel finds that: The EPA was right in 2009 (when it found that climate change driven by society’s emissions of greenhouse gases are endangering human health & lives), and that everything we've learned since has only made it more right.

arstechnica.com/science/2025...

Atmospheric River Impacts on the Greenland Ice Sheet Through the Last Interglacial Atmospheric rivers are dynamically coupled to orbit through latitudinal shifts in wind belts and seasonal shifts in moisture availability High latitude moisture controls the frequency, intensity,...

Our paper is out today in @aguadvances.bsky.social 🥳! My coauthors and I use a simulation spanning the Last Interglacial (~130,000 - ~115,000 years ago) to show how changes in Earth's orbit impact atmospheric river behavior and the ensuing impacts on the Greenland ice sheet. 🧪🥼⚒️❄️

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Come join us in NYC! We are hiring an Assistant Prof. in my Dept at Columbia - info below. Review of applications starts in October.

A new paper out in AGU Advances led by Xiaoqing Liu in which we try to take the 'time' out of paleo and focus on the pattern of warming for wide range of global warming levels.
agupubs.onlinelibrary.wiley.com/share/K8WWRP...

Day 4, #ICP15 , panel discussion on Tropical Monsoon Climate
On stage Pedro DiNezio @triptychphrases.bsky.social @edhathorne.bsky.social AD Singh River Shen and @antacl.bsky.social

What is the underlying physics/working that good models get it right compare to other models -data-model integration

A tabby kitty cat taking a nap on a roll of carpet behind the posters at a conference venue

Having a great time at the International Conference on Paleoceanography - great talks on past climate. Shoutout to under appreciated poster here at #ICP15 on how to look cute and take naps during monsoon rains

Super jet lagged but happy to be here! Thank you to the organizers. Looking forward to the science but also seeing some monsoon 🌧️

Assistant Professor - Physical Climate Science - Department of Environmental Science, Policy, and Management University of California, Berkeley is hiring. Apply now!

We’re looking for an Assistant Professor in Physical Climate Science. Apply and join a great interdisciplinary Department! @natureatcal.bsky.social @agu.org @freshwaterscience.bsky.social
#academicjobs

aprecruit.berkeley.edu/JPF05084

Elevated shallow water salinity in the deglacial Indian Ocean was sourced from the deep - Nature Geoscience Increased salinity of Subantarctic Mode Water during the initial phase of the Last Deglaciation could have enhanced deep water formation in the North Atlantic, according to proxy records from a sedime...

🚨 New Paper Alert! 🚨

We reconstructed past ocean salinity in one of the largest Subantarctic Mode Water production centers on the planet: the southeast Indian Ocean. We found a rapid increase in SAMW salinity during the Last Deglaciation.

Where did this salt come from? We argue the deep ocean. 🧪🌊

DOE climate report response form We are collecting names to assemble a writing team to respond to the DOE climate working group report. If you'd like to contribute, enter your info below. At this point, there is no guarantee what we'll do (if anything), but we want to keep our options open by collecting names. If you have any further questions, feel free to email me. We are primarily looking for Ph.D. scientists at universities or government labs in appropriate fields. I realize that this will exclude some qualified people and I apologize, but we felt this was necessary for a variety of reasons.

🚨 If you're interested in working on a coordinated response to the DOE climate report, please enter your info on this google form 🚨

Please RT this so as many people see it as possible.

forms.gle/BL9xUAfRxA...

Influence of Indian Summer Monsoon on Marine Biological Productivity Across the Late Pliocene and Early Pleistocene Indian Summer Monsoon runoff and marine productivity reconstructions from the Bay of Bengal in the Late Pliocene-Early Pleistocene Nuanced responses to eccentricity, obliquity, and precession cha...

🚨New paper alert🚨

We present the first record of Indian Monsoon variability and marine productivity spanning the late Pliocene–early Pleistocene (3.5 - 2.3 Ma).

Multi-proxy data from the core zone of ISM rainfall - the NW Bay of Bengal.

⚒️🌊🌏

agupubs.onlinelibrary.wiley.com/doi/10.1029/...

RealClimate: National Climate Assessment links RealClimate: For some reason, it has become hard to locate the various National Climate Assessments (NCAs) that have been produced by the USGCRP over the decades (and it's pretty hard to find the USGR...

If you are having trouble finding National Climate Assessment reports, they are here.

www.realclimate.org/index.php/ar...

Hugely proud of @sgavirneni.bsky.social for his first paper published last week in Paleobiology. With Linda Ivany, we linked marine #bivalve #extinction risk to adult resting metabolic rate (both whole-body total and mass-specific) over the past 300 million years... [1/5]
doi.org/10.1017/pab....

🧪 CRITICAL UPDATE: The House draft version is now out.

✅ Like the Senate's version, there's no cut to NASA's budget.

❌ There's a 23% proposed cut to NSF's budget.

8-page summary: appropriations.house.gov/sites/evo-su...

Draft bill: appropriations.house.gov/sites/evo-su...

Cold-air outbreaks in the continental US: Connections with stratospheric variations Extreme US cold linked to two variations of a stretched stratospheric polar vortex can explain a Northwest US cooling trend.

🌀 Why is it still so cold in winter?

Despite warming trends, the US still gets hit by brutal cold snaps. A new study links these outbreaks to shifts in the stratospheric polar vortex: high-altitude winds that can steer winter weather far below.

🔗 doi.org/10.1126/scia...

#Weather #SciComm 🧪

The Secretary of Commerce's new policy requiring his personal review of all NOAA contracts over $100,000 is directly harming American science. 🧪

How do I know? Because this morning, twelve of America's rising leaders in climate science (including myself) were furloughed.

The Paleo Society Government Affairs Committee presents: 2025 Geosciences Congressional Visit Days September 9 & 10. Applications due July 10. The Paleo Society logo and the American Geosciences Institute logos are in the upper corners. Pangea is in the background and art of a government building is present.

We are sending 8-10 members to participate in the Geoscience Congressional Visit Days September 9th & 10th in DC! Participation is open to all US members, including undergraduate and graduate students, faculty, staff, and avocational paleontologists. Apply today!
#Paleontology #Geology #Geoscience

David is very multitalented - he’s been such an asset to our group! Feel free to get in touch with him at either his Syracuse or UGA emails if you want to discuss further!

Climate change outpaces trees: Forests face centuries-long lag in adaptation Ecologists are concerned that forest ecosystems will not keep pace with a rapidly changing climate, failing to remain healthy and productive. Before the rapid climate change of the past century, tree ...

In the interest of celebrating good things, former lab postdoc David Fastovich (and new Assistant Prof at University of Georgia!) has a new paper looking at rates of ecosystem change in response to past climate change: press release: phys.org/news/2025-07...

Paper: www.science.org/doi/10.1126/...

It's hard to avoid recalling this passage from the English historian Tony Judt:

National Science Foundation Surprise: Employees Being Relocated to
Accommodate Secretary of HUD’s Palatial New Office

www.afge.org/contentasset...

Fundamentally unchanged northwestern African rainfall regimes across the Plio-Pleistocene transition The northern African summer monsoon was unaffected by global cooling at the end of the Pliocene 3 million years ago.

New Science Advances paper on Plio-Pleistocene northern African hydroclimate! Tl;dr the wet summer monsoon = summer insolation & the dry winter monsoon = global ice volume

Paper here (www.science.org/doi/10.1126/...), Brown press release here (www.brown.edu/news/2025-06...)