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Hannah Dion-Kirschner

@hdkgeo.bsky.social
775 followers 906 following 73 posts

Terrestrial carbon cycle researcher invested in educational equity & Earth’s future 🌏 Postdocing at UChicago Ecology & Evolution

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Reposted by Hannah Dion-Kirschner
Tyler Pasciak LaRiviere @tylerplariviere.bsky.social · 23/01/2026
Well I felt all that -27 degrees getting these images this morning. Stay warm Chicago!
Chunks of ice float in Lake Michigan at North Avenue Beach as temperatures plummet in the Chicago area with windchills at around -30 degrees, Friday, Jan. 23, 2026. | Tyler Pasciak LaRiviere/Sun-TimesSea smoke emits Lake Michigan as chunks of ice float along the waters surface at North Avenue Beach, as temperatures plummet in the Chicago area with windchills at around -30 degrees, Friday, Jan. 23, 2026. | Tyler Pasciak LaRiviere/Sun-TimesA man looks over into Lake Michigan from the North Avenue Beach Pier as temperatures plummet in the Chicago area with windchills at around -30 degrees, Friday, Jan. 23, 2026. | Tyler Pasciak LaRiviere/Sun-TimesA woman gingerly walks along a sheet of ice coating the North Avenue Beach Pier as temperatures plummet in the Chicago area with windchills at around -30 degrees, Friday, Jan. 23, 2026. | Tyler Pasciak LaRiviere/Sun-Times
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depths of wikipedia @depthsofwikipedia.bsky.social · 15/01/2026
wikipedia turns 25 today! the last unenshittified major website! backbone of online info! triumph of humanity! powered by urge of unpaid randos to correct each other! somehow mostly reliable! "good thing wikipedia works in practice, because it sure doesn't work in theory" - old wiki adage
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Hannah Dion-Kirschner @hdkgeo.bsky.social · 15/01/2026
The deep sea is so wild. If you told me this was a recreation of the Burgess Shale fauna I would believe it
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Hannah Dion-Kirschner @hdkgeo.bsky.social · 07/01/2026
Was anybody going to tell me that Frankenstein is about work life balance for researchers or was I just supposed to read the book myself
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Hannah Dion-Kirschner @hdkgeo.bsky.social · 28/12/2025
“The sun’s energy is a gift we have not earned, and yet it comes. That gift of photosynthesis is then shared with others. It’s shared with the larvae of those caterpillars that are eating the leaves…in the abundance of fruits that the [birds] are all coming to feast on.”
insideclimatenews.org
Lessons on Scaling Gift Economies—and How It Can Help the Planet - Inside Climate News
Robin Wall Kimmerer, author of “The Serviceberry,” offers ideas rooted in nature for creating sharing economies as a way to bind communities, offer purpose and reduce strain on the Earth.
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Ryan J Hollister @phaneritic.bsky.social · 28/12/2025
Holy moly. Landslide ruptured buried gas line which caused an explosion (apparently?) and now a major N/S artery from Central Cal to SoCal is still shut down. www.latimes.com/california/s...
latimes.com
Gas line explosion in Castaic prompts 5 Freeway closure, shelter-in-place order
Los Angeles County firefighters were responding to a gas line explosion in Castaic on Saturday, which prompted the California Highway Patrol to close a portion of the 5 Freeway and the Fire Department...
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Katharine Hayhoe @katharinehayhoe.com · 17/12/2025
“NCAR has played a greater role in advancing weather prediction & atmospheric modeling than perhaps any other single entity in the world,” says @weatherwest.bsky.social Dismantling NCAR would be “like taking a sledgehammer to the keystone holding up our scientific understanding of the planet.” KH
nbcnews.com
Trump administration plans to break up largest federal climate research center
Russ Vought, director of the White House Office of Management and Budget, said the National Science Foundation "will be breaking up" the National Center for Atmospheric Research in Colorado.
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Daniel Swain @weatherwest.bsky.social · 08/12/2025
It appears that the U.S. Environmental Protection Agency (EPA) has, within the past week, scrubbed a large amount of climate change content from its official website, as well as *removed human-caused warming* from the discussion on its "causes of climate change" page.
Snapshot of US EPA's "causes of climate change" webpage as of 12/8/2025. Human causes are no longer mentioned anywhere on the page.
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Hannah Dion-Kirschner @hdkgeo.bsky.social · 13/11/2025
I’m looking for a pop science book that follows scientific efforts to measure and/or model the global carbon cycle—would happily accept any recommendations! 🌏 #geoscience
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Reposted by Hannah Dion-Kirschner
Hannah Thomasy @hannahthomasy.bsky.social · 13/11/2025
This is an Eastern Cape giant cycad. This specimen at Kew Gardens is the world's oldest potted plant* & it is older than the United States. I found this oddly comforting? Certain systems seem deeply entrenched & unchangeable but in reality there are houseplants that have been around longer.🧪🌿
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Gavin Foster @thefosterlab.bsky.social · 11/11/2025
This is great news: www.theguardian.com/world/2025/n.... Not least because it removes one of the common denialist retorts “what’s the point if China aren’t doing it” - they clearly are and so should we
theguardian.com
China’s CO2 emissions have been flat or falling for past 18 months, analysis finds
World’s biggest polluter on track to hit peak emissions target early but miss goal for cutting carbon intensity
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Franciska de Vries 🟥 @frantecol.bsky.social · 11/11/2025
🚨 Job alert 🚨 Come work with us as a postdoc modelling the impacts of climate change on plant-soil interactions and C sequestration! Apply here before the 3rd of December: werkenbij.uva.nl/en/vacancies... Check out this video of the project you will be working in: vimeo.com/1133112953?s...
vimeo.com
KligrasV5_ENG
This is "KligrasV5_ENG" by Nyah Yentl van Koningsveld on Vimeo, the home for high quality videos and the people who love them.
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Hannah Dion-Kirschner @hdkgeo.bsky.social · 14/10/2025
I love hearing scientists’ origin stories because they highlight how the interests that draw us to science are as diverse as we are 🌱 For me it was: 1. A 5th grade teacher who taught a lesson on climate change, my first time learning about Earth’s climate system
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Eos @eos.org · 05/08/2025
NASA is making plans to shut down two Earth observing satellites that provide key data to climate scientists and farmers, despite lawmakers telling them it’s illegal to do it. Story by @astrokimcartier.bsky.social eos.org/research-and...
eos.org
NASA Planning for Unauthorized Shutdown of Carbon Monitoring Satellites - Eos
Despite warnings that their actions are illegal, Duffy and other senior NASA officials have continued to secretly direct NASA employees to draw up plans to end at least two major satellites missions s...
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SeppeKuehnLab @seppekuehnlab.bsky.social · 17/07/2025
New paper in @nature.com! With @kiseokmicro.bsky.social , Siqi Liu, Kyle Crocker, Jojo Wang, Mikhail Tikhonov & Madhav Mani — a massive dataset and simple model reveal a few conserved regimes that capture how soil microbiome metabolism responds to perturbations. www.nature.com/articles/s41...
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Noah Fierer @noahfierer.bsky.social · 21/06/2025
Hope this is useful - consensus statement "Guidelines for preventing and reporting contamination in low-biomass microbiome studies" rdcu.be/er3Io
rdcu.be
Guidelines for preventing and reporting contamination in low-biomass microbiome studies
Nature Microbiology - In this Consensus Statement, the authors outline strategies for processing, analysing and interpreting low-biomass microbiome samples, and provide recommendations to minimize...
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Brooke Fitzwater, PhD (she/her) 🐟🪱🏳️‍🌈♾️ @oceanfilly.bsky.social · 18/06/2025
It's been hard for early career biologists looking for postdocs, so I created a Google Sheet where we can all compile fellowships/job boards/postdoc opportunities in one place. PLEASE SHARE WIDELY! If you're a PI looking for postdocs, you can add to the 4th tab! docs.google.com/spreadsheets...
docs.google.com
Postdoc Opportunity Megathread
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Scott Delaney @scott-delaney.bsky.social · 16/06/2025
⚖️ HUGE day today in the NIH terminations cases There's a trial (of sorts) at 10a ET in Boston today for arguments that NIH unlawfully terminated 100s of grants. It's a 3 hour hearing and I'll post periodic updates. Of note: this is the 1st lawsuit filed against the Trump Admin to go to trial.
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David Ho @davidho.bsky.social · 11/06/2025
Climate.gov, a major US government website supporting public education on climate science, will likely shut down after almost all of its staff were fired. What would be worse is if the website were co-opted to publish climate denial content.
theguardian.com
Major US climate website likely to be shut down after almost all staff fired
Exclusive: Climate.gov, which supports public education on climate science, will soon no longer publish new content
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Heidi Aronson, PhD @heidi-aronson.bsky.social · 23/05/2025
Our paper on the cultivation of a putative sulfur comproportionator from the Frasassi caves is finally out! Jan would have been happy to see this paper published - it's got everything that he loved: thermodynamics, cultivation, weird metabolisms, and life underground. Cheers to Jan! rdcu.be/enlo3
rdcu.be
Isolation of a putative sulfur comproportionating microorganism
Scientific Reports - Isolation of a putative sulfur comproportionating microorganism
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Jon Freeman @freemanjb.bsky.social · 21/05/2025
🚨 A new rule would let career scientists like NSF/NIH program officers be replaced by political appointees Already 14,000+ public comments, deadline is Friday 📣 Comments can be short. Courts consider them—and scientists with NSF/NIH experience are especially impactful Speak up! shorturl.at/WKuBj
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Chanda Prescod-Weinstein 🌌 @chanda.blacksky.app · 22/05/2025
NSF Physics was cut by 85%, basically wiping out most of its capacity for supporting research. NSF Astronomy was cut by 53% Undergrad education was cut by 71% and research on learning by 79% Graduate education was cut by 100% to ZERO. #GiftLink ⚛️🔭 www.nytimes.com/interactive/...
nytimes.com
Trump Has Cut Science Funding to Its Lowest Level in Decades (Gift Article)
The lag in funding extends far beyond D.E.I. initiatives, affecting almost every area of science: chemistry, computing, engineering, materials and more.
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Reposted by Hannah Dion-Kirschner
LA Public Press @lapublicpress.bsky.social · 22/05/2025
Altadena community calls on Gov. Newsom, California legislature to protect them from predatory developers. A new report shows that more than half of Altadena land sales since February have gone to corporations. lapublicpress.org/2025/05/alta...
lapublicpress.org
Altadena community calls on Gov. Newsom, California legislature to protect them from predatory developers
A new report shows that more than half of Altadena land sales since February have gone to corporations.
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Guim Aguadé-Gorgorió @guimaguade.bsky.social · 20/05/2025
Microbial communities can harbor many species that do not coexist in pairs, yet can coexist in the full community. Here we provide the mathematical foundations of emergent coexistence, and explain why it can't be predicted from pairwise tests www.biorxiv.org/content/10.1...
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Scott Delaney @scott-delaney.bsky.social · 14/05/2025
My ongoing request: If your NSF or NIH grant was terminated--whether at Harvard or elsewhere--please report it here. NSF: grant-watch.us/submit-nsf.h... NIH: grant-watch.us/submit-nih.h... Our trackers are actively used in lawsuits and are often the only record that terminations ever occurred.
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Daniel Swain @weatherwest.bsky.social · 15/05/2025
I just created a quick map depicting which portions of the United States are now (as of today) or will imminently be (by early June) without 24/7 local National Weather Service coverage (per Washington Post reporting). #CAwx #CAfire #CAwater #ORwx #AKwx #WYwx #KSwx
Map of local National Weather Service office "areas of responsibility" modified (using polygons with black outlines and red fill) to indicate where recent/expanding cuts to NOAA/NWS have resulting in understaffing so extreme that some offices can not longer operate on a 24/7 basis.
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Reposted by Hannah Dion-Kirschner
Jacquelyn Gill @jacquelyngill.bsky.social · 14/05/2025
The American public is broadly supportive of maintaining federal science and medical research funding, and against punishing universities by taking their funding away, according to a new poll:
apnorc.org
Few support punitive funding cuts to colleges and universities - AP-NORC
Most of the public believes that colleges and universities make significant contributions to scientific and technological advancement and think their federal research funding should be maintained.
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Belinda Medlyn @bmedlyn.bsky.social · 23/02/2025
#oneforjournalclub
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Simon Haberstroh @simonhaber.bsky.social · 21/02/2025
Are you enthusiastic about #waterstableisotopes in forest trees? 🌲🌳💧 We offer a PhD position on ecohydrological feedbacks in forests under recurrent drought. Join our team in Freiburg: uni-freiburg.de/stellenangeb... @chriswernerlab.bsky.social @uni-freiburg.de @hydrofreiburg.bsky.social
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ABC7 Eyewitness News @abc7.bsky.social · 14/02/2025
Timelapse video shows a debris basin filling up fast in the Bailey Canyon area of Sierra Madre in the Eaton Fire burn area. The video is taken over the span of one hour. That basin doing what it was designed for - keeping that mud and debris from going any further. abc7.la/4gDtQ7L
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Hannah Dion-Kirschner @hdkgeo.bsky.social · 06/02/2025
I used to regularly access this NOAA page on atmospheric GHG concentrations, so glad to know it’s still available from UCSD ⚒️🌏🧪
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Hannah Dion-Kirschner @hdkgeo.bsky.social · 06/02/2025
Is Photosynthesis-Derived NADPH Really a Source of 2H-Depleted Hydrogen in Plant Compounds? onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
Is Photosynthesis‐Derived NADPH Really a Source of 2H‐Depleted Hydrogen in Plant Compounds?
We provide evidence that photosynthetically produced NADPH is not the major source of 2H-depletion in carbohydrates.
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Freddy Bunbury @freddybunbury.bsky.social · 31/01/2025
How does light structure microbial mats? To explore this, we studied #Cyanobacteria and Chloroflexota from hot springs. Using simple synthetic communities, we found that these species cooperate, forming stronger #biofilms and moving further together. Paper now in PNAS: pnas.org/doi/10.1073/...
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Bill Smith @wkolby.bsky.social · 27/01/2025
Happy to share a new paper, "Effects of Hot Versus Dry Vapor Pressure Deficit on Ecosystem Carbon and Water Fluxes," led by the amazing Miriam Johnston w/ @mallorybarnes.bsky.social and others agupubs.onlinelibrary.wiley.com/doi/10.1029/...
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Ayana Elizabeth Johnson @ayanaeliza.bsky.social · 28/01/2025
There is *a lot* going on right now. My hot take, as I try to keep up wrt our planet: “These executive orders will make our air dirtier, make people sicker, make energy more expensive, and make our communities less prepared for extreme weather.” apnews.com/article/trum...
apnews.com
What to know about Trump's first executive actions on climate and environment
President Donald Trump’s first week in office included a flurry of executive orders with implications for Earth’s climate and environment.
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Hannah Dion-Kirschner @hdkgeo.bsky.social · 18/01/2025
My heart is breaking for all the local K-12 students who have known one disruption after another throughout their primary education. I’ve been so lucky to get to know many vibrant, bighearted young people in Pasadena public schools. Hoping they can soon regain a sense of normalcy and safety ❤️
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Covering Climate Now @coveringclimatenow.org · 18/01/2025
The war in Gaza has carried with it an “immense” carbon footprint. The vast majority of war-linked emissions were due to Israel’s aerial bombardment and ground invasion of Gaza, as well as US cargo planes delivering war supplies to Israel. By @ninalakhani.bsky.social for @theguardian.com
theguardian.com
Emissions from Israel’s war in Gaza have ‘immense’ effect on climate catastrophe
Exclusive: First months of conflict produced more planet-warming gases than 20 climate-vulnerable nations do in a year, study shows
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Paul P Murphy, CNN @paulpmurphy.bsky.social · 09/01/2025
This Maxar Technologies sat image with SWIR shows what was on fire in Altadena, California this morning at 10:45 a.m. local time. Nearly everything.
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Hannah Dion-Kirschner @hdkgeo.bsky.social · 08/01/2025
Have never seen wind like this. Trash cans blowing down the streets, already very smoky down here in Pasadena from the #EatonCanyon #Fire
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Daniel Swain @weatherwest.bsky.social · 07/01/2025
Confirmed reports now of "hundreds" of cars that were abandoned by drivers on Sunset Boulevard amid frantic #PalisadesFire evacuation gridlock earlier. (Folks made it out on foot.) CalFire/LA County bulldozers are in process of clearing path for emergency vehicles. #CAwx #CAfire
Snapshot from KTLA live footage of abandoned vehicles on Sunset Boulevard.
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Karen Lloyd @karenlloyd.bsky.social · 19/12/2024
Census of Deep Life is the largest compendium of subsurface microbiological samples sequenced together to-date. We found some pretty cool microbial trends across major provinces of Earth's subsurface. Nice job pulling this together, @emilruff.bsky.social www.science.org/doi/epdf/10....
science.org
A global comparison of surface and subsurface microbiomes reveals large-scale biodiversity gradients, and a marine-terrestrial divide
You have to enable JavaScript in your browser's settings in order to use the eReader.
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Catie Hausman @catiehausman.bsky.social · 02/01/2025
Planning your climate or environment syllabus? I like to show short videos so students & I can visualize some of the things we're talking about. Here are some of the ones I like:
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John Burns @burnsajohn.bsky.social · 01/01/2025
Let's kick of the New Year like an acantharian with a little #protistsonsky fireworks magic. Happy New Year 2025! 🦑
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Hannah Dion-Kirschner @hdkgeo.bsky.social · 29/12/2024
Shoutout to the IL state flag submission that highlights the state fossil, the Tully Monster
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Itai Yanai @itaiyanai.bsky.social · 27/12/2024
Top 4 misconceptions about science 1. It fills knowledge-gaps (discoveries are unknown unknowns) 2. It proceeds along a straightforward path (discoveries are not predictable) 3. It looks for answers (new questions are crucial) 4. It is only rational (requires night science leaps)
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Mathew Barlow @mathewabarlow.bsky.social · 18/12/2024
One last classic: heating at the lower boundary. tinyurl.com/4rhc5k3u Video clip doesn't show the full development of the convection cells but I am absolutely mesmerized every time.
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Hannah Dion-Kirschner @hdkgeo.bsky.social · 18/12/2024
Methane is such a potent greenhouse gas and (aside from the urgent need for an energy transition) we could make a dent in emissions just with better industrial standards/regulation—capping old wells, fixing leaky pipelines. But of course industry won’t even accurately measure and report emissions.
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Hannah Dion-Kirschner @hdkgeo.bsky.social · 17/12/2024
www.nature.com/articles/s41...
nature.com
A framework for understanding collective microbiome metabolism - Nature Microbiology
This Perspective explores why microbiome members perform partial metabolism of substrates and suggests that proteome efficiency is a driver of collective microbiome metabolism.
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SeppeKuehnLab @seppekuehnlab.bsky.social · 14/12/2024
www.nature.com/articles/s41...
nature.com
Metabolic rearrangement enables adaptation of microbial growth rate to temperature shifts - Nature Microbiology
Growth rate dynamics after temperature shifts can be explained by metabolic rearrangement due to temperature-sensitive enzyme activities in bacteria and yeast.
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Melaine Le Roy @subfossilguy.bsky.social · 13/12/2024
The absolute wonder of walking onto a glacier like the Perito Moreno (SPI, Argentina) 🧊🌊😍 After decades of frontal stability this iconic glacier is retreating since 2019 and monitored by IANIGLA for the last few years Pic Lucas Ruiz 1/
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