David Harning
@davidharning.bsky.social
Research Scientist @cires.colorado.edu and NOAA | Arctic paleoclimate | climate solutions | http://davidharning.com
Deadline extended to October 20, 2026!
David Harning@davidharning.bsky.social · 7mo agoCalling all Quaternary Geochronology enthusiasts! I'm serving as a Guest Editor for @natureportfolio.nature.com (Scientific Reports) upcoming special issue and would be excited to see your submission. Learn more about the collection and how to contribute👇 www.nature.com/collections/...
We have a few weeks yet, but I know you're thinking about submitting an abstract to AGU. If so, you might want to consider our session: GC049 - Establishing the scientific basis for marine Carbon Dioxide Removal (mCDR) Link here: agu.confex.com/agu/agu26/pr... 🌊🧪
TODAY! I am fully aware of how absurd a <24h deadline is but trust me there’s a good reason. if you’re interested in this postdoc, send me your CV immediately.🧪⚒️
Dr Dan Shugar 🇨🇦@watershedlab.bsky.social · 2mo ago🚨Funding for 2yr postdoc w/ me & @geocron.bsky.social on landslide-tsunami-jökulhlaup project, but (this is the ridiculous part) I need to select someone NOW or I lose the $. If you're NOT in Canada (can be any nationality) and interested, send me your CV and transcripts by midnight MT, June 12. 🧪⚒️
Three weeks left to apply to our postdoc position on alpine plant resilience! Us: Three years of funding, an awesome collaborative team, a gorgeous study system, blueberry pie, unionized postdocs. You: A PhD and experience in ancient DNA, paleoecology, and/or plant genetics and genomics.
Postdoctoral Research Associate
The University of Maine is a community of more than 11,900 undergraduate and graduate students, and 2,500 employees located on the Orono campus, the regional campus in Machias, and throughout the stat...
fa-ewca-saasfaprod1.fa.ocs.oraclecloud.com
The Pacific Institute is hiring two researchers! One on water and climate equity, the other on nature-based solutions. Here's the information. If you know anyone suitable, pass this on. pacificinstitute.applytojob.com/apply/
Pacific Institute - Career Page
Explore open job opportunities at Pacific Institute.
pacificinstitute.applytojob.com
🧵 Public science in the US has taken some heavy hits over the last year, but the White House OMB is proposing a series of changes that will result in a TKO for science as we know it unless we fight back. Here's what's happening, and why it matters. 1/n
Come work with me!
CIRES@cires.colorado.edu · 3mo agoThe CIRES Communications team is hiring a graphic designer and communications specialist! This is a full-time position that sits at the intersection of graphic design, strategic brand thinking, and user-centered science communication. Apply by May 29: jobs.colorado.edu/jobs/JobDeta...
New mCDR paper out. This one was years in the making and supported by so much of our extended community. 80 coauthors!
Monitoring, reporting, and verification of marine carbon dioxide removal: Exploring scientific consensus and divergences across continents
Marine Carbon Dioxide Removal (mCDR) approaches are increasingly considered for climate change mitigation as a supplement to rapid emissions reduction. However, it is still unclear if mCDR approaches ...
online.ucpress.edu
📢 Job Alert; open-ended post!! We are seeking an observational oceanographer, with a keen interest in instrumentation and fieldwork in the polar regions. Please share and help connect us with the right candidate! fa-evzn-saasfaukgovprod1.fa.ocs.oraclecloud.com/hcmUI/Candid...
Observational Oceanographer
British Antarctic Survey | Open-Ended Appointment | Cambridge |
fa-evzn-saasfaukgovprod1.fa.ocs.oraclecloud.com
Hear science journalist Peter Brannen @peterbrannen.bsky.social discuss his book 'The story of CO2 is the story of everything: How carbon dioxide made our world' 🗓️ Tuesday April 28th 11am Mountain 📍 CU Boulder East Campus, SEEC S228 and Zoom calendar.colorado.edu/event/peter-...
A deep dive into a suite of water isotope proxies, many thanks to this great team: @yarrowaxford.bsky.social Bryan, Gabe, Wil & Jeemin
Water-Isotope Proxies in Lake Sediments: Calibrations, Uncertainties, and New Directions
Paleoclimatologists have long recognized that H and O isotopes of materials in lake sediments can help reconstruct past climate and environmental change. Here, a global synthesis of O isotopes in lab-...
annualreviews.org
‼️New paper alert ‼️ We combined 16S amplicon sequencing and brGDGT analysis to look for correlations between microbial communities in water intubations. Our work also takes advantage of the latest studies in brGDGT producers to strengthen our findings using a bit of bioinformatics.
5 years ago...when we couldn't get into the lab due to COVID, I started compiling an Icelandic Ice Sheet geochronology database. Whelp, it's finally open for discussion on ESSD. Looking forward to see what we can collectively do with this: essd.copernicus.org/preprints/es... 🧪
ICEland-1: A geochronological database for reconstructing Late Quaternary glacier, relative sea level, and paleoclimate patterns in Iceland
Abstract. We present a comprehensive and quality-controlled chronological database for past glacier, relative sea level, and paleoclimate changes in Iceland during the Late Quaternary: ICEland-1. The ...
essd.copernicus.org
New discussion paper just dropped that’s taken shall we say a little work to get this far … essd.copernicus.org/preprints/es... please be kind. Not on an at all sensitive topic in the slightest.
How well can we quantify when 1.5 °C of global warming has been exceeded?
Abstract. Parties to the 2015 Paris Agreement agreed to limit the long-term increase in global average temperature to well below 2 °C and pursue efforts to keep temperatures below 1.5 °C relative to p...
essd.copernicus.org
Calling all Quaternary Geochronology enthusiasts! I'm serving as a Guest Editor for @natureportfolio.nature.com (Scientific Reports) upcoming special issue and would be excited to see your submission. Learn more about the collection and how to contribute👇 www.nature.com/collections/...
Quaternary geochronology
This Collection invites submissions on the latest advances in quaternary geochronology.
nature.com
To Greenlanders: thank you for years of friendship and partnership; we stand with you. Qujanaq, ilagaasi. U.S. scientists: Write your reps in D.C. TODAY. Urge them to support Greenland's right to self-determination. Insist the U.S. engage respectfully and peacefully with our ally. bit.ly/3LjITdm
Statement from U.S. Scientists in Solidarity with Greenland
STATEMENT FROM U.S. SCIENTISTS IN SOLIDARITY WITH GREENLAND Amerikarmiut Kalaallit Nunaanut misissuiartortartut nunatsinnut ataqatigiinerannu...
bit.ly
New paper alert ! 🙂 Happy to share our new study published in The Cryosphere ! doi.org/10.5194/tc-1... We modelled the evolution of the Greenland Ice Sheet from the LGM (24 ka) to the present and learned a lot on its former history and dynamics ! @jeremyely.bsky.social @chrisdclark.bsky.social
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...
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...
wustl.wd1.myworkdayjobs.com
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)
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 ...
science.org
PNAS: Six-million-year-old ice discovered in Antarctica offers unprecedented window into a warmer Earth via our NSF COLDEX & US Antarctic Program. ❄️ www.pnas.org/doi/10.1073/...
Not sure if I’m supposed to promote my work as a furloughed government employee, but our paper comparing vegetation communities of the now-submerged central Bering land bridge and modern (Holocene) Bering Sea islands, with implications for the timing of sea-level transgression, is out!
Arctic, Antarctic, and Alpine Research@aaarjournal.bsky.social · 10mo agomiriamcjones.bsky.social et al.’s #newarticle on Bering Land Bridge (BLB) climate & vegetation during the Last Glacial Maximum shows Bering Sea island vegetation communities reflect the timing of their isolation from the BLB with sea level transgression: doi.org/10.1080/15230430.2025.2557062
miriamcjones.bsky.social et al.’s #newarticle on Bering Land Bridge (BLB) climate & vegetation during the Last Glacial Maximum shows Bering Sea island vegetation communities reflect the timing of their isolation from the BLB with sea level transgression: doi.org/10.1080/15230430.2025.2557062
It definitely piqued my interest to see Clark et al's reconstruction of sea level for the past 4.5 million years, something I first heard about several years ago. However, upon reading it, I am very surprised that this was published. 🧵 1/11 doi.org/10.1126/scie...
Global mean sea level over the past 4.5 million years
Changes in global mean sea level (GMSL) during the late Cenozoic remain uncertain. We use a reconstruction of changes in δ18O of seawater to reconstruct GMSL since 4.5 million years ago (Ma) that acco...
doi.org
New paper! PhD student Mia Tuccillo has uncovered another big impact of past warming in Greenland: lakes lost oxygen for thousands of years and cyanobacteria took over 🦠 🧪 🦠. It's kinda yikes... With collaborator @geobiomaggie.bsky.social (1/3)
🚨 New paleoclimate proxy paper from a team of INSTAARs, working with colleagues from UC Santa Cruz & U of Iceland. 1st author David Harning now works with CIRES & NOAA, but remains an INSTAAR Affiliate. Congrats all! 👏🏽
David Harning@davidharning.bsky.social · 11mo agoNew paper on ancient DNA and lipids from Icelandic lakes. This one threw some unexpected results and now has me thinking a lot about lake oxygen’s role in organic matter preservation, the climate proxies derived from them, and past methane cycling. #Paleosky www.nature.com/articles/s43...
New paper on ancient DNA and lipids from Icelandic lakes. This one threw some unexpected results and now has me thinking a lot about lake oxygen’s role in organic matter preservation, the climate proxies derived from them, and past methane cycling. #Paleosky www.nature.com/articles/s43...
Both redox potential and climate control molecular proxies in Icelandic Holocene lake sediments
Communications Earth & Environment - Recovery of complementary materials from well-ventilated and seasonally stratified lakes can allow reliable reconstruction of local temperature and...
nature.com
Registration for experts interested in serving as Expert Reviewers and providing scientific comments on the First Order Draft of the Special Report on Climate Change and Cities is now open! Register here: apps.ipcc.ch/comments/src... ⚠️ Registration closes 30 Nov2025 🔗 www.ipcc.ch/2025/09/17/p...
🚨New paper!🚨🥳 Delighted to share our new paper out now on global lake brGDGT temperature calibrations: advances, applications and challenges: www.sciencedirect.com/science/arti... @hassfacultyncl.bsky.social @bas.ac.uk @ogu-bristol.bsky.social
Development of new global lake brGDGT-temperature calibrations: advances, applications, challenges, and recommendations
Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are a group of temperature-sensitive membrane lipids found in bacteria that have been widely …
sciencedirect.com
Reminder: Applications are open until October 31st! 📣
Arctic Data Center@arcticdatactr.bsky.social · 11mo ago📣 Upcoming data science training: March 2-6, 2026! Applications are now OPEN for our course Reproducible Approaches to Arctic Research Using R. This training is held on Zoom (in Pacific Time) and will be our only training of 2026, so don’t miss the chance to apply! forms.gle/Tv6enduXfHxX...
