Sign in

Dr. Jennifer Pett-Ridge

@jeffinerca.bsky.social
4.5K followers 1.1K following 128 posts

Mom/mentor/microbial ecologist. Studying farming carbon & CDR for healthy soils and climate resilience, w stable isotope probing, ‘omics, systems analysis. Lead of LLNL Carbon Initiative, Microbes Persist, Terraforming Soil Earthshot & Roads2Removal.org

PostsRepliesMedia
Reposted by Dr. Jennifer Pett-Ridge
Gernot Wagner @gwagner.com · 23h
3(!) climate researchers won @macfound.org genius awards today: @hollyjeanbuck.bsky.social, Kaiyu Guan, Marika Holland! Well deserved. www.macfound.org/programs/awa...
macfound.org
Holly Jean Buck
Investigating the social, ethical, and political dimensions of climate and energy policies and emerging technologies.
13713
Reposted by Dr. Jennifer Pett-Ridge
Sarah McAnulty, Ph.D. @sarahmackattack.bsky.social · 25/09/2026
If you care about keeping the Academy of Natural Sciences open to the public in Philadelphia, I need you to read and share this thread. Trish Wellenbach was sent from the mayor's office to oversee the Academy of Natural sciences situation. She needs to hear from us. Here comes the action item:
15549483
Reposted by Dr. Jennifer Pett-Ridge
Hoodlum 🇺🇸 @nothoodlum.bsky.social · 26/09/2026
They warned us Mamdani would impose Sharia law. Instead, he unleashed the real threat: line dancing in Bryant Park.
1371302996628
Reposted by Dr. Jennifer Pett-Ridge
Sarah McAnulty, Ph.D. @sarahmackattack.bsky.social · 24/09/2026
Good morning, team. We have 3.5 days until Drexel closes the Academy of Natural Sciences. It’s time for you- yeah YOU- to make some calls. Step 1: Tell the following people we need help pressuring Drexel to keep the museum open: Josh Shaprio 717-787-2500 Mayor Parker's 215-686-2181
8279220
Reposted by Dr. Jennifer Pett-Ridge
AGU (American Geophysical Union) @agu.org · 23/09/2026
🏆 AGU is excited to announce the recipients of the 2026 Union Medals, Awards and Prizes; Fellows; and Section Awards and Lectures. Please join us in congratulating these accomplished individuals. spklr.io/63325ETfjN
AGU is excited to announce the recipients of the 2026 Union Medals, Awards and Prizes; Fellows; and Section Awards and Lectures. Please join us in congratulating these accomplished individuals.
0207
Dr. Jennifer Pett-Ridge @jeffinerca.bsky.social · 23/09/2026
Just finished a kickoff meeting w the “ActiveSOIL” team— and I can barely believe my good fortune - getting to work on soil health w this amazing group! w/ @andreasrichter.bsky.social @cemess.bsky.social, Caitlin Singleton (Aalborg University), and Michael Obersteiner (University of Oxford)
1192
Dr. Jennifer Pett-Ridge @jeffinerca.bsky.social · 22/09/2026
Truth!
010
Dr. Jennifer Pett-Ridge @jeffinerca.bsky.social · 20/09/2026
An energy story: 4 years ago, I got a call from former Sec of Energy Jennifer Granholm (actually a VM — I was on a flight when she rang). With the news that I would receive the DOE Office of Science Lawrence Award. It was utterly unexpected.
Side of a residential home with an electric storage batte
1131
Reposted by Dr. Jennifer Pett-Ridge
Cristi Proistosescu @cristiproist.bsky.social · 19/09/2026
Oprah Meme: 
“You get an AGU co-author notification!”
3433
Reposted by Dr. Jennifer Pett-Ridge
Will Ratcliff @wcratcliff.bsky.social · 15/09/2026
1/17 Submissions are now open for the 2027 Microbial Population Biology GRC! We expect this meeting to be extraordinarily oversubscribed. If you want to come, time is of the essence--apply ASAP! June 27–July 2 • Andover, NH www.grc.org/microbial-po...
310369
Reposted by Dr. Jennifer Pett-Ridge
BeijingPalmer @beijingpalmer.bsky.social · 10/09/2026
It might seem that the existence of a Fetterman is an indictment of the senatorial system’s design but in fairness the Founders would have expected somebody who behaved like this to get killed in a duel by an irate constituent.
231356172
Reposted by Dr. Jennifer Pett-Ridge
Sarah McAnulty, Ph.D. @sarahmackattack.bsky.social · 03/09/2026
Attention Philadelphia! We're hosting a rally to demand that Drexel University maintain The Academy of Natural Sciences Museum open to the public. Join us on Tuesday morning at 10am in front of the academy. Please spread the word, we need all hands on deck! RSVP here: luma.com/1qwnrqz2
A dinosaur on a white background with the text SAve the academy of Natural sciences museum rally Tuesday Sept 8 10am in front of the academy 1900 ben Franklin Parkway. "Tell Drexel University "Keep the museum open!" with the logos for Philly Science Action, Skype a Scientist, and Green Philly
171410892
Reposted by Dr. Jennifer Pett-Ridge
Zeke Hausfather @zekehausfather.com · 01/09/2026
The emissions scenarios underlying the next generation of climate model runs that will be featured in the upcoming IPCC 7th Assessment Report are officially out! I have a big new explainer over at Carbon Brief taking an in-depth look at what they mean and whats changed: www.carbonbrief.org/...
7234115
Reposted by Dr. Jennifer Pett-Ridge
Scott Doney @scottdoney.bsky.social · 01/09/2026
Misrepresentation of Human Climate Fingerprint in DOE Report - Santer et al. - 2026 - Earth's Future - @agu.org @aguscipolicy.bsky.social @andrewdessler.com agupubs.onlinelibrary.wiley.com/doi/10.1029/...
agupubs.onlinelibrary.wiley.com
Misrepresentation of Human Climate Fingerprint in DOE Report
A July 2025 DOE report claimed that there is no human fingerprint on the vertical structure of atmospheric temperature change This claim was based on a comparison of modeled and observed temperat...
01210
Reposted by Dr. Jennifer Pett-Ridge
Stand Up for Science! @standupforscience.net · 24/08/2026
🚨WARNING🚨 Today is the LAST DAY to leave your public comment on the NSF Proposal. The Proposal implements some of Vought's Science-Destroying OMB Proposal plans in advance: zurl.co/9nywR Leave your public comment TODAY using our guide & tool: fight2win.standupforscience.net/campaign/Pro...
fight2win.standupforscience.net
Stand up for Science
Stand up for Science
4106133
Reposted by Dr. Jennifer Pett-Ridge
Noam Ross @noamross.net · 21/08/2026
Three more days to comment on NSF's attempt to smuggle in OMB's already-rejected policies of terminating any grant without cause, gutting civil rights obligations and restricting international collaborations. Submit your comment today! Then call your representatives. 🧪
3142138
Reposted by Dr. Jennifer Pett-Ridge
Ketan Joshi @ketanjoshi.co · 19/08/2026
"I have to say I've never been more shocked by the so-called climate "movement." I don't know what I was expecting, but it wasn't the immediate cowering that so many organizations and politicians are doing" - @amywestervelt.bsky.social drilled.ghost.io/the-problem-...
drilled.ghost.io
The Problem Class
Sometime last year, I was asked to participate in a closed door conversation in which a mix of academic researchers, journalists, and climate campaigners were asked to share their unvarnished thoughts...
14012
Dr. Jennifer Pett-Ridge @jeffinerca.bsky.social · 15/08/2026
Anyone else having trouble getting a NZ visa for #ISME20? Submitted mine days ago but it is still pending…now looks like I’ll miss Monday as well as the opening ceremony 😞
241
Reposted by Dr. Jennifer Pett-Ridge
Ran Blekhman @blekhman.bsky.social · 09/08/2026
Huge faculty recruitment effort at the University of Chicago -- a division-wide, open-rank search looking to hire about 20 faculty across 5 research areas in biology. Come be our colleague! Full announcement: uchicago.app.box.com/s/ckih9zv3rj...
3222232
Reposted by Dr. Jennifer Pett-Ridge
Just Kevin @kevinleecaster.bsky.social · 28/07/2026
Deep-rooted grasses and forbes should be grown on marginal land on farms that they harvest to produce biochar soil amendment to help their operations become net-zero via Carbon Dioxide Removal. agupubs.onlinelibrary.wiley.com/doi/10.1029/... @jeffinerca.bsky.social
agupubs.onlinelibrary.wiley.com
Assessing the Effect of a Deep‐Rooted Grass on Belowground Carbon Storage in Cultivated Land: Insights From a Multi‐Site US Study
Switchgrass (Panicum virgatum, L.) stored significantly more carbon in root biomass than shallow-rooted crops at 12 sites across the USA Switchgrass had no detectable effect on soil organic carbo...
121
Reposted by Dr. Jennifer Pett-Ridge
Cluster of Excellence 'MicroPlanet' @microbesplanet.bsky.social · 24/07/2026
Congratulations to CoE Key Researcher @andreasrichter.bsky.social @cemess.bsky.social @univie.ac.at and ActiveSOIL team Caitlin Singleton @aau.dk, @jeffinerca.bsky.social, LLNL and Michael Obersteiner @ox.ac.uk on receiving €10 million from @novo-nordisk.bsky.social @fwf-at.bsky.social
1103
Reposted by Dr. Jennifer Pett-Ridge
Adam Frew @frewecologist.bsky.social · 16/07/2026
We composited soil cores and lost 49 AM fungal taxa doing it. Sequencing individual subsamples found them. The ones that vanish are rare, patchy, and phylogenetically clustered. Also drying vs freezing made no difference really. Sample at the scale your question lives at. doi.org/10.1016/j.so...
doi.org
Redirecting
03014
Reposted by Dr. Jennifer Pett-Ridge
Jeff Spence @jeffspence.github.io · 14/07/2026
I just followed this advice to comment on the OMB rule changes. There are about 3 hours left before the deadline (tonight at 11:59p EDT). If you benefit from US Government-funded research make sure to get your comments in. elizabethginexi.substack.com/p/what-we-ne...
elizabethginexi.substack.com
What We Need to do NEXT: OMB’s Proposed Federal Financial Assistance Rule (OMB-2026-0034)
What OMB’s Proposed Federal Financial Assistance Rule Means in Practice
084
Reposted by Dr. Jennifer Pett-Ridge
Michael Wagner @michiwagner4.bsky.social · 10/07/2026
🎉 Herzlichen Glückwunsch an @andreasrichter.bsky.social, Caitlin Singleton, @jeffinerca.bsky.social und Michael Obersteiner zum 10 Mio. € Grant der @novo-nordisk.bsky.social für Active Soil! 🌱 @cemess.bsky.social @microbesplanet.bsky.social @univie.ac.at 🌍👏 www.univie.ac.at/aktuelles/pr...
univie.ac.at
Andreas Richter erhält hochdotierte Förderung der Novo Nordisk Stiftung
Neues internationales Forschungsprojekt zu Bodengesundheit unter Leitung der Universität Wien
0223
Reposted by Dr. Jennifer Pett-Ridge
Soil Microbial Ecology Group @soilmicrobes.bsky.social · 22/06/2026
Inspired by an incredible week at #ISVC2026! 🌱 Researchers from 5 continents, 14 countries & 28 institutions dug into soil virus ecology. Huge thanks to our invited speakers: Joanne Emerson, @gtrubl.bsky.social, @karthik-a.bsky.social, @simrouxvirus.bsky.social, and @jeffinerca.bsky.social 🦠
0124
Reposted by Dr. Jennifer Pett-Ridge
Faith Kearns, Ph.D. @fkearns.bsky.social · 14/06/2026
Mark Arax in the style of Mark Arax on California and the through line from the gold rush to ag rush to data center and AI rush, with a good detour on “sustainable” groundwater www.theguardian.com/us-news/ng-i...
theguardian.com
Welcome to California: land of plunder and hypocrisy | Mark Arax
From gold to water, California’s wealth was built on extraction. The AI boom is reviving an old question: who pays the price?
3187
Dr. Jennifer Pett-Ridge @jeffinerca.bsky.social · 28/05/2026
#SOM2026 in São Paulo has been amazing! Huge thanks to the hosts who invited me to give a keynote talk about surprising biology in deep soils Escola Superior de Agricultura Luiz de Queiroz - ESALQ/USP and the CCARBON/USP - Center for Carbon Research in Tropical Agriculture
Jen Pett-Ridge standing in front of large sign welcoming delegates to Soil Organic Matter 2026 meetingThree soil scientist posing together at the Soil Organic Matter 2026 meetingJen Pett-Ridge and Diego Barcellos pose for a photo at the Soil Organic Matter 2026 meeting
070
Reposted by Dr. Jennifer Pett-Ridge
David Knowles @writerknowles.bsky.social · 27/05/2026
Great piece by @leahstokes.bsky.social www.sfchronicle.com/opinion/open...
sfchronicle.com
California shouldn’t abandon a proven way to cut rising energy costs
OPINION: The Demand Side Grid Support Program could save Californians up to $206 million on their electricity bills — unless the state stops funding it, Leah C. Stokes writes.
0216
Reposted by Dr. Jennifer Pett-Ridge
Patrick S. Mitchell @psmitchej.bsky.social · 25/05/2026
Thrilled to announce that the Department of Microbiology at the University of Washington, School of Medicine is hiring at the Assistant Professor level (tenure-track)! The Pacific Northwest is an awesome place to live and do science 🧪🦠. Join us! apply.interfolio.com/185622 Applications due 8/1.
apply.interfolio.com
Apply - Interfolio {{$ctrl.$state.data.pageTitle}} - Apply - Interfolio
2138125
Reposted by Dr. Jennifer Pett-Ridge
Patrick Samphire 🏴󠁧󠁢󠁷󠁬󠁳󠁿 @patricksamphire.bsky.social · 16/05/2026
The next James Bond should be Gary Oldman in his Jackson Lamb persona.
Actor Gary Oldman playing Jackson Lamb in the Slow Horses TV series. He is scruffy, unshaven, with lank, greasy hair.
3767757866
Reposted by Dr. Jennifer Pett-Ridge
Leah Stokes @leahstokes.bsky.social · 15/05/2026
California gubernatorial candidate Xavier Becerra just took half a million dollars from the fossil fuel industry. This on top of the max contribution from Chevron. When someone shows you who they are, believe them.
39718234
Reposted by Dr. Jennifer Pett-Ridge
Joe Mason @moreorloess.bsky.social · 04/05/2026
New paper on destabilization of buried soil organic carbon under changing moisture regimes, based on incubation experiments with the Brady Soil, a prominent paleosol in the Great Plains loess sequence. Teneille Nel et al., soil.copernicus.org/articles/12/...
soil.copernicus.org
Destabilization of buried carbon under changing moisture regimes
Abstract. Paleosols formed by the burial of topsoil during landscape evolution can sequester substantial amounts of soil organic carbon (SOC) over millennia due to protection from surface disturbances...
1135
Reposted by Dr. Jennifer Pett-Ridge
Tanya Cheeke @tanyacheeke.bsky.social · 04/05/2026
Devastating loss of Dr. Adriana Romero-Olivares this week. She was an amazing mycologist, a leader in her field, & my friend & collaborator. This is a tremendous loss for mycology, science, & the world. There is a meal train for her husband & two small children www.mealtrain.com/trains/l3kg64
mealtrain.com
Meal Train for Jovani Catalan (Spouse of Adriana Romero Olivares)
Hi all, Please help out the family of Adriana Romero Olivares. Her husband, Jovani, and kids can be helped with meals over the next weeks as Adriana recovers.
03818
Dr. Jennifer Pett-Ridge @jeffinerca.bsky.social · 29/04/2026
Such heartbreaking news….i have long enjoyed Adriana’s work on fungi and warming, Valley Fever and ways to better engage with the Global South. My heart goes out to her family and colleagues.
1185
Dr. Jennifer Pett-Ridge @jeffinerca.bsky.social · 18/04/2026
Today was a good day. Each year in mid-April, I give one of my favorite lectures...at Berkeley High School's 9th grade Climate Conference. We talk about Farming Carbon, how rocks (minerals) + roots + microbes + water = soil. We go over how the earth system is changing...
2130
Dr. Jennifer Pett-Ridge @jeffinerca.bsky.social · 02/04/2026
You wanna know if deeply rooted grasses put more carbon in the ground? "Sometimes you've gotta rent a van and drive around the country..." So said @ericslessarev.bsky.social & team in this wonderful study. 12 sites in central/eastern USA... dx.doi.org/10.1029/2025...
dx.doi.org
Assessing the Effect of a Deep‐Rooted Grass on Belowground Carbon Storage in Cultivated Land: Insights From a Multi‐Site US Study
Switchgrass (Panicum virgatum, L.) stored significantly more carbon in root biomass than shallow-rooted crops at 12 sites across the USA Switchgrass had no detectable effect on soil organic carbo...
1269
Reposted by Dr. Jennifer Pett-Ridge
Sammy Roth @sammyroth.bsky.social · 29/03/2026
In light of the Iran war, the UK will require all new homes to be built with solar panels and energy-efficient electric heat pumps. How...logical! www.cnbc.com/2026/03/24/i...
cnbc.com
Britain responds to Iran war energy shock by requiring solar panels and heat pumps in all new homes
The move comes as part of Britain's response to the Iran war, with the conflict triggering the largest supply disruption in the history of the oil market.
17423
Reposted by Dr. Jennifer Pett-Ridge
Stable Isotope Ecology (CER, Kyoto Univ.) @stableisotopeecol.bsky.social · 28/03/2026
Drought Reduces Formation, but Enhances Persistence, of Mineral-Associated Organic Matter in a Grassland Soil、Global Change Biology, #stableisotopes onlinelibrary.wiley.com/doi/full/10....
onlinelibrary.wiley.com
Drought Reduces Formation, but Enhances Persistence, of Mineral‐Associated Organic Matter in a Grassland Soil
We used a 13C-CO2 labeling study to track the formation and persistence of mineral-associated soil carbon derived from living root and decaying root inputs under normal moisture and droughted conditi...
033
Reposted by Dr. Jennifer Pett-Ridge
biometlab @biometlab.bsky.social · 26/03/2026
update on the experiment my colleague John Harte started almost 30 years ago www.theguardian.com/environment/...
theguardian.com
Rise of the shrubs: what happened when scientists heated a Rocky Mountain wildlife meadow by 2C?
A long-running experiment in Colorado provides an ‘alarming’ view of how rapidly unchecked global heating could transform fragile ecosystems
713883
Dr. Jennifer Pett-Ridge @jeffinerca.bsky.social · 20/03/2026
Spent the evening helping my 16 yo study for her IB Bio exam — ecology and evolution unit. And darned if I don’t actually know some stuff!! Like… all of it. Somehow reaffirming that— even with all the chaos, funding disappearing, sponsors imploding…I still think I chose the right career.
090
Reposted by Dr. Jennifer Pett-Ridge
Peter Lind @peteralind.bsky.social · 17/03/2026
Associate Senior Lecturer/Assistant Professor position in Molecular Microbiology available at Lund University, Sweden: lu.varbi.com/en/what:job/...
lu.varbi.com
Associate Senior Lecturer/Assistant Professor in Molecular Microbiology
The Department of Biology conducts research and teaching in many subject areas such as ecology, evolutionary biology, organismal biology and molecular biology. A total of approximately 300 people curr
02552
Reposted by Dr. Jennifer Pett-Ridge
molly taft @mollytaft.com · 04/03/2026
there's a lot going on right now but did you know a massive amount of the world's fertilizer flows through the middle east, and did you know that that fertilizer needs to be shipped to the us *right now* for planting season, and uh did you know we are at war with iran
wired.com
Trump’s War on Iran Could Screw Over US Farmers
The Middle East supplies a huge amount of the world’s fertilizer. Conflict in the region has sent prices soaring ahead of the critical spring planting season.
13326361093
Reposted by Dr. Jennifer Pett-Ridge
Shannon Carey @scmaestra.bsky.social · 07/03/2026
so in other words, a typical Oakland kid 😎
0224
Dr. Jennifer Pett-Ridge @jeffinerca.bsky.social · 05/03/2026
EMSL-JGI meeting in Seattle was pretty great! (although I’ll be happy when we can stop talking nonstop about AI and just use it like any other tool). Best part by far was getting to see my dear friend and former postdoc Ashley Campbell.
070
Dr. Jennifer Pett-Ridge @jeffinerca.bsky.social · 23/02/2026
Ahh, if theres a massive Feb snowstorm in DC, I must be here for the Genomic Sciences mtg. Without fail…
040
Dr. Jennifer Pett-Ridge @jeffinerca.bsky.social · 09/02/2026
Felicidades Benito!!! What a wonderful love letter to Puerto Rico, La Isla del Encanto. We are celebrating with tostones, arroz maspasteao, amarillos, pinchos, pastelillos and coco mojitos!!
0100
Reposted by Dr. Jennifer Pett-Ridge
jamelle @jamellebouie.net · 07/02/2026
"For years, a cottage industry of political observers has contorted itself to obscure and occlude the obvious. That regardless of what others see in him, Trump’s entire political career...cannot be understood outside the context of his bitter, deep-seated racism." (gift link)
nytimes.com
Opinion | This Is Just Who Trump Is
15767871925
Reposted by Dr. Jennifer Pett-Ridge
Karis McFarlane @karis-mcfarlane.bsky.social · 04/02/2026
We are recruiting a postdoc to study wetland plant-soil-microbe interactions using isotope labeling in our greenhouse at LLNL with me and Erin Nuccio as part of a multidisciplinary project. Experience with wetland plants and SIP a plus. Please share! www.linkedin.com/posts/activi...
linkedin.com
Sign Up | LinkedIn
500 million+ members | Manage your professional identity. Build and engage with your professional network. Access knowledge, insights and opportunities.
1912