Leaf Wax Hydrogen Isotopes Reflect Storm Track Position Over Western North America We analyze modern leaf waxes in near-shore marine sediments spanning a north–south transect along the coast of western North America Leaf wax hydrogen isotope values become more negative at the l...

We have a new paper out in Paleoceanography and Paleoclimatology showing that the latitudinal gradient in leaf wax hydrogen isotopes over western North America reflects the mean climatological position of the storm tracks. agupubs.onlinelibrary.wiley.com/doi/pdf/10.1...

Ice core reveals low CO2 during warm spell 3 million years ago For the first time, scientists have measured atmospheric gases from the late Pliocene, yielding data that could help to predict the future climate

New results from old ice....happy to answer any questions!

How does water get underground – and how much rainfall is needed to replenish it?

Thanks to the amazing UNSW team for producing this story on our groundwater and climate research: past, present and future, featuring Marilu Melo Zurita, Martin Andersen, Ellen Corrick, Danyang Sun, Akhilesh Kumar,…

The AI-Augmented Scientist The promise and pitfalls of using AI tools to boost my capabilities as a scientist

As a rare climate scientist working in Silicon Valley, I've been drinking from the AI firehose a lot more than my peers. I thought it would be helpful to lay out my experiences of both the promise and pitfalls of using AI to accelerate scientific research:

Yes

Paleoclimate pattern effects help constrain climate sensitivity and 21st-century warming | PNAS Paleoclimates provide examples of past climate change that inform estimates of modern warming from greenhouse-gas emissions, known as Earth’s clima...

Really excited to see this paper out!! Led by @vtcoop.bsky.social we show that if you use cold and warm paleoclimates together, you can reduce uncertainty in Earth's climate sensitivity by quantifying the pattern effect and more precisely constrain future climate change www.pnas.org/doi/10.1073/...

Rock art from at least 67,800 years ago in Sulawesi - Nature A hand stencil painted on a cave wall on a small island off the coast of Sulawesi more than 67,800 years ago suggests a very early occupation of Wallacea.

New oldest dated rock art in the world, from Sulawesi (Indonesia).

People have always made art!

https://www.nature.com/articles/s41586-025-09968-y

Starting my academic reading this year with a fascinating study documenting the frequency of tropical cyclones in the South China Sea over the past ~650 years. We need more of this type of data to understand extreme weather patterns and their relationship with climate.

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

Excited to share our new paper (w/ @aakashsane.bsky.social @baylorfk.bsky.social) where we used the CESM-LME and information theory to understand Pacific decadal variability! 🌊
link.springer.com/epdf/10.1007...

Remote and Regional Drivers of the Indonesian Throughflow Under Future Warming: Implications for Inter‐Basin Freshwater Transport Under future warming, Pacific wind changes reduce Indonesian Throughflow surface transport through the Halmahera Sea Future Atlantic Meridional Overturning Circulation decline induces oceanic adj...

Thrilled to share our new paper in GRL investigating future changes to Indonesias Seas currents using a high resolution climate model (CESM-HR)!

doi.org/10.1029/2025...

Exploring Drip Water Dynamics for Groundwater Recharge

The end of the year is approaching, and the papers and pre-prints are still coming from the groundwater and climate research team here and our collaborators. Here is a summary of our outputs the last three months of the year. All are…

There aren't a lot of resources for what people can do to prevent the destruction of NCAR, so I made this:

#NCAR #climate #climatescience #weather #meteorology #activism #myresources

Join us for a critical conversation on the future of U.S. atmospheric science.

UCAR President Antonio Busalacchi hosts this town hall on what’s at stake if NSF NCAR is dismantled.

buff.ly/jR6tGwo

#AGU25: Please consider showing up to support Cobb Lab early career researchers from Brown. I especially want to flag undergrad posters Thursday pm and *high school* posters Thursday am. I'm incredibly proud of their hard work to get to this point!

AGU25 attendees: Ever failed before? (probably, right?!). Then our panel discussion is for you! Come hear epic fail stories from your peers and maybe even share your own.

Tuesday 16:15-17:45, Room 343
agu.confex.com/agu/agu25/me...

AGU25 attendees: Ever failed before? (probably, right?!). Then our panel discussion is for you! Come hear epic fail stories from your peers and maybe even share your own.

Tuesday 16:15-17:45, Room 343
agu.confex.com/agu/agu25/me...

Here's the lineup of my group's presentations at #AGU25. Come meet with us!

Quantifying changes in central Vietnam rainfall amount since the Late Pleistocene Paleorecords of the Southeast Asian autumn monsoon indicate that global sea-level change drove abrupt shifts in rainfall, yet the magnitude of these c…

🚨 New manuscript! 🚨

We use speleothem calcium isotopes and Mg/Ca to reconstruct rainfall amount. Turns out central Vietnam was 50 % drier during the LGM 🤯. Climate models agree but most underestimate rainfall change.

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

Who killed the hobbit? 💀🐘🦴⛰️🌧️☀️🪨⛏️

Our new paper out today in Communications Earth and Environment reveals the role of a major drought in the disappearance of the diminutive hominin Homo floresiensis.

theconversation.com/the-hobbits-...

If you are at #AGU25 I shall be presenting a new reconstruction on Indian Summer Monsoon over the last millennium using speleothem records.
agu.confex.com/agu/agu25/me...

I got my PhD in a geography department and the DDRIG program was crucial to funding the final push of measurements I needed for my dissertation. This sucks.

forgot to tag @blueicedude.bsky.social! and many others not on this app

ps - calcium isotopes are a newish proxy in the speleothem world and are extremely cool because they can be used to reconstruct rainfall amount. most traditional speleothem proxies (d18O, d13C, trace elements) reflect qualitative rainfall change

open access link (good until mid january 2026): authors.elsevier.com/a/1mBQY,Ig4c...

@cavesandclimate.bsky.social @cavemangriff.bsky.social @annabelwolf.bsky.social

Quantifying changes in central Vietnam rainfall amount since the Late Pleistocene Paleorecords of the Southeast Asian autumn monsoon indicate that global sea-level change drove abrupt shifts in rainfall, yet the magnitude of these c…

🚨 New manuscript! 🚨

We use speleothem calcium isotopes and Mg/Ca to reconstruct rainfall amount. Turns out central Vietnam was 50 % drier during the LGM 🤯. Climate models agree but most underestimate rainfall change.

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

Screenshot of at least 20 slides on Climate Change: Key facts from Climate Central.

📣 We just released a new free resource at @climatecentral.org - a 72-slide deck introducing key facts about climate change, including its causes, impacts, and solutions. It also comes with speaker notes and links for local storytelling.

➡️ www.climatecentral.org/climate-matt... (English & Spanish)

Moving sucks! Where to?

Larger teams worsen academic career prospects As teams grow, new Ph.D. graduates are less likely to land tenure-track jobs and more likely to leave science—especially women and international researchers

As teams grow, new Ph.D. graduates are less likely to land tenure-track jobs and more likely to leave science—especially women and international researchers, according to research from last year. https://scim.ag/3JHinJs #ScienceMagArchives

Classic Maya response to multiyear seasonal droughts in Northwest Yucatán, Mexico Stalagmite record reveals 1- to 13-year droughts in NW Yucatán from 871 to 1021 CE, a time of profound Maya cultural change.

Interested in #Maya history, #climate change, #stalagmites and #drought, and the #SYP autosampler? Read the latest in our detailed work on a sample from #Tzabnah cave! 😎 kudos to all our collaborators in #Mexico!
@andy-baker.bsky.social @mwclimatesci.bsky.social

www.science.org/doi/10.1126/...

Great to see our work in @eos.org ! A good read for the evening! 😇 kudos to all our friends & colleagues that contribute to this ongoing endeavour - there is so much to learn! 🤩 together - always! @thomasopel.bsky.social @juvmcburst.bsky.social @pucicu.de @scitobias.bsky.social @leverhulme.ac.uk