Anna Harper (she/her) @docaharper.bsky.social · 23/07/2026This makes zero sense. Keeping bikers safe helps people live healthier, happier, and longer lives. Cycling reduces road congestion and pollution. 000
Anna Harper (she/her) @docaharper.bsky.social · 23/07/2026Sorry, I couldn't hear you over my crunchy cricket snack ... "This is a common sense approach despite the Left's belief that everyone should ride a bike to their shoebox-sized apartment to eat crickets to achieve a phony climate agenda." From a DOT spokesperson. www.npr.org/2026/07/23/n...npr.orgDOT cranks up its campaign to strip bike lane references from federal websitesTransportation officials have removed a growing list of safety materials that mention bike lanes from federal websites. Safety advocates warn that's undermining proven measures for reducing crashes. 100
Anna Harper (she/her) @docaharper.bsky.social · 25/06/2026I want to say something clever about finalizing the IPCC WGI first draft while in Europe during a record-breaking heatwave, but I'm too hot. 140
Reposted by Anna Harper (she/her)Dr. Aaron Thierry @thierryaaron.bsky.social · 02/06/2026Scientists: We desperately need long, unbroken records of North Atlantic currents to see how close we are to a #climate tipping point. US government: sending ships to rip 900 deep-sea sensors out of the water. Congress voted twice to keep them funded. They're being pulled anyway.nytimes.comTrump Administration to Dismantle Ocean Monitoring System 14184122
Anna Harper (she/her) @docaharper.bsky.social · 20/05/2026I voted today. How are Americans feeling about the status quo? Well, this was the longest I've ever waited to vote (40 minutes). 041
Anna Harper (she/her) @docaharper.bsky.social · 19/05/2026According to Strava, I've biked on my typical morning commute route 200 times since March 2024! Biking to/from work is so great, but we need better infrastructure & awareness in Athens to make it safer and more accessible. 010
Anna Harper (she/her) @docaharper.bsky.social · 19/05/2026Not to mention the effect of rolling back all climate policies, which Hausfather also mentioned in his post, and could also bring us to more than 4°C warming. So yeah, let's celebrate the progress made but keep the foot on the gas, er, I mean EV pedal. 000
Anna Harper (she/her) @docaharper.bsky.social · 19/05/2026And although it's good news that we aren't on the rcp85 emissions pathway by 2100, there are feedbacks in the climate system that are highly uncertain and could lead to 4°C+ warming, so there is still work needed to understand responses to continued emissions up to and beyond 2100. 110
Anna Harper (she/her) @docaharper.bsky.social · 19/05/2026This is a helpful thread prompted by a recent paper which, among other things, retired the very high emissions scenario for the next CMIP. Climate scientists have known this was coming for a while, but Trump used it as a reason to blast us all as idiotic alarmists. 1/2 110
Reposted by Anna Harper (she/her)Marshall Shepherd @drshepherd2013.bsky.social · 08/05/20261st ever National Meteorologists Day is this weekend (May 9) and yes it is different from National Weatherperson's Day. I explain here. My discussion with Sean Potter #NationalMeteorologistsDay www.forbes.com/sites/marsha...forbes.comThe 1st National Meteorologists Day Is This Weekend — What Is It?Here's everything you need to know about the inaugural National Meteorologists Day on May 9, 2026. 0196
Anna Harper (she/her) @docaharper.bsky.social · 28/04/2026Pleased to see this is the quote that was pulled out of my interview with UGA's Office of Research. Addressing climate change is an 'all hands on deck' kind of situation. Let's go. research.uga.edu/news/harper-... 030
Reposted by Anna Harper (she/her)Bob Kopp @bobkopp.net · 22/04/2026Regardless of the US government’s position, US scientists continue contributing in full force to the @ipcc.bsky.social Seventh Assessment Report. Working Group 1 Lead Author Meeting, Santiago de Chile 1609
Anna Harper (she/her) @docaharper.bsky.social · 22/04/2026Happy #EarthDay from the second lead author meeting for the #IPCC WGI report in Santiago, Chile. As we are discussing all the many impacts of climate change, it's good to pause and remember what a beautiful planet we have and the responsibility to be good stewards of our shared home. 292
Anna Harper (she/her) @docaharper.bsky.social · 09/04/2026Yes same here 😆 I got very distracted by that 010
Anna Harper (she/her) @docaharper.bsky.social · 09/04/2026I love this interview so much. Basically - the nerds are angry and we're not going away. Also mentoring early career researchers is extra difficult now, & especially if they are in the US on a visa. There is so much added stress for international researchers. grist.org/science/kate...grist.orgWhy this NASA climate scientist wants you to stay angry“I don’t think we rebuild science without getting mad.” 181
Anna Harper (she/her) @docaharper.bsky.social · 04/04/2026I recently submitted my 1st first-author paper since 2020. Why the long gap? We had our 2nd child in Aug 2020. In 2023 we moved to another country. In 2024 my son was diagnosed w/ Autism and ADHD. Scientists & academics are people first, & everyone's career looks different. 1100
Reposted by Anna Harper (she/her)Emanuele Bevacqua @bevacquae.bsky.social · 25/03/2026In a new Nature study, we show that extreme global climate outcomes may occur even under moderate 2°C warming for several sectors. The findings reinforce the urgency of limiting warming well below 2°C. Together with @erichfischer.bsky.social @janasillmann.bsky.social @zscheischlerjak.bsky.socialnature.comModerate global warming does not rule out extreme global climate outcomes - NatureExtreme global climate outcomes may occur even under moderate 2 °C warming and may turn out to be more extreme than model-averaged projections at 3 °C or 4 °C warming. 19854
Reposted by Anna Harper (she/her)Zack Labe @zacklabe.com · 26/03/2026🚨 It’s official: 2026 had the lowest annual maximum Arctic sea ice extent on record - essentially tied with last year’s record low. Climate change is reshaping the Arctic, and it's all throughout the year. For more information from @nsidc.bsky.social: nsidc.org/news-analyse... 7186107
Anna Harper (she/her) @docaharper.bsky.social · 25/03/2026Trying to understand how forests like this one might recover after disturbances was the motivation for a proposal I recently submitted to the Dept of Energy. 🤞🏼 010
Anna Harper (she/her) @docaharper.bsky.social · 25/03/2026While it's difficult to attribute a single event to human-caused climate change, we do expect more extreme rainfall from hurricanes, a higher proportion of intense hurricanes, and warmer springs as the climate warms. 110
Anna Harper (she/her) @docaharper.bsky.social · 25/03/2026What does climate change look like? Hiking through Table Rock Mountain State Park, SC. It experienced record-breaking rainfall during Hurricane Helene in 2024, extensive damage to the forest, and a wildfire in spring 2025, thanks to downed trees and a dry winter/spring (and a careless smoker). 121
Anna Harper (she/her) @docaharper.bsky.social · 25/03/2026All the best to you, Kate. You and every other scientist working in the federal govt deserve so much better. Glad you are not leaving science, we need you! 000
Reposted by Anna Harper (she/her)Alan Gerard @wxmanms1.bsky.social · 16/03/2026BREAKING: University Center for Atmospheric Research (UCAR) files suit against NSF, OMB, NOAA and DOC to halt alleged "violations of the Constitution and Administrative Procedure Act" undertaken by agencies to dismantle Nat'l Center for Atmospheric Research. open.substack.com/pub/balanced...open.substack.comBreaking News: UCAR files federal lawsuit to stop dismantling of National Center for Atmospheric ResearchLawsuit lists NSF, NOAA, DOC, OMB and their directors as defendents 7604214
Reposted by Anna Harper (she/her)Dr. Robin Tanamachi 🌪️ @tornatrix.bsky.social · 24/02/2026If you have personal testimonials about how @ncar-ucar.bsky.social has benefited your career, submit your story to @ametsoc.org via this web form. #SaveNCAR docs.google.com/forms/d/e/1F...docs.google.comNSF NCAR StoriesAs part of its coverage of, and response to, federal plans to break up the NSF National Center for Atmospheric Research (NSF NCAR), the American Meteorological Society is collecting testimonials from ... 02317
Reposted by Anna Harper (she/her)David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 10/02/2026There are tens of thousands of scientists working in the US whose funding or careers have been damaged, and dozens of them moving to other countires is...not that many. "Just move to somewhere else and do science" is not a serious approach here. There aren't anywhere near enough jobs elsewhere.nature.comDozens of researchers will move to France from US following high-profile bid to lure talentLarge proportion worked at Columbia University, which had its grants cut and frozen by the administration of US President Donald Trump. 55422
Anna Harper (she/her) @docaharper.bsky.social · 10/02/2026This is disturbing on many levels, and costs at least $584 million just for the purchase. The conditions in existing DHS facilities are inhumane. Meanwhile science budgets have been slashed in this country, leaving us all more vulnerable to climate change and disease. 100
Reposted by Anna Harper (she/her)Daniel Swain @weatherwest.bsky.social · 23/01/2026Attention folks in the weather, climate, disaster, wildfire, and Earth science communities: NSF has just published a new "Dear Colleague" letter inviting feedback (by Mar 13) on the proposal to dismantle the National Center for Atmospheric Research (NCAR). www.nsf.gov/funding/... 6499415
Anna Harper (she/her) @docaharper.bsky.social · 09/01/2026Similar feelings here. It's a mess. I'm grateful for the inspiring group of authors on this report. I think we will persevere. 130
Reposted by Anna Harper (she/her)Bob Kopp @bobkopp.net · 08/01/202650. US withdraws from @ipcc.bsky.social, @ipbes.net, @irena-official.bsky.social, Intl Union for the Conservation of Nature, UN Energy, UN Oceans, UN Water, @ununiversity.bsky.social, UNFCCC, among others (Jan. 7, 2026)whitehouse.govWithdrawing the United States from International Organizations, Conventions, and Treaties that Are Contrary to the Interests of the United StatesMEMORANDUM FOR THE HEADS OF EXECUTIVE DEPARTMENTS AND AGENCIES By the authority vested in me as President by the Constitution and the laws of the United 47547
Anna Harper (she/her) @docaharper.bsky.social · 07/01/2026I'm excited to moderate this discussion tomorrow (register below👇🏼), which will explore some challenges of AI use in weather and climate applications, including fairness, data democratization, communicating uncertainty, and dealing with data sparse areas or loss of data streams. 021
Anna Harper (she/her) @docaharper.bsky.social · 17/12/2025You're keeping count. Depressing but helpful to see. 000
Reposted by Anna Harper (she/her)Kim Cobb @kimcobb.bsky.social · 17/12/2025It is hard to overstate how critical @ncar-ucar.bsky.social is to climate science in the US and around the world. It's the beating heart of our field. Generations of scientists have trained there, and almost everyone I know relies on deep collaborations with NCAR scientists. It's end is unthinkable. 27550274
Reposted by Anna Harper (she/her)Helen Czerski @helenczerski.bsky.social · 07/12/2025TIL about a memorial ceremony in Iceland in 2019 to mark the end of a glacier, changing the place name from Okjökull to Ok (jökull = glacier). Uncompromising wording on the bronze plaque: "This is to acknowledge that we know what is happening and what needs to be done. Only you know if we did it". 113127235197
Reposted by Anna Harper (she/her)IPCC @ipcc.bsky.social · 04/12/2025The IPCC’s First Lead Author Meeting for AR7, is taking place in Paris this week. The French Minister for Europe and Foreign Affairs, Mr Jean-Noël Barrot welcomed around 600 authors from more than 100 countries to the Quai d’Orsay on Tuesday evening. bit.ly/4ir09cC 0448
Reposted by Anna Harper (she/her)Bob Kopp @bobkopp.net · 06/12/2025@agu.org is in a tricky situation with the federal paramilitaries in New Orleans — they can’t make security promises if they aren’t sure they can keep them, and if the state-run convention authority is telling them they can’t bar warrantless agents, they can’t promise to do so. 3307
Anna Harper (she/her) @docaharper.bsky.social · 01/12/2025Great start to the IPCC lead author meeting! ✔️ Inclusivity was set as a priority for this assessment cycle, we even had a full session on it 🎆 All 3 working groups are together the whole week, it's an exciting opportunity to talk outside discipline boundaries ⏳We have a lot of work to do! Let's go 040
Anna Harper (she/her) @docaharper.bsky.social · 30/11/2025This is a poignant reflection to read as I prepare to begin my journey as an IPCC author - thank you Ben Santer for sharing this and for the path that you and others have set for this generation of climate scientists.thebulletin.orgA climate scientist reflects on 30 years fighting the 'forces of unreason'Thirty years ago, the IPCC agreed on a historic finding: “The balance of evidence suggests a discernible human influence on global climate.” 081
Anna Harper (she/her) @docaharper.bsky.social · 30/11/2025Hello fellow IPCC author and runner, I just got back from a very similar looking run! It's a nice evening. Good way to start a busy week! 020
Anna Harper (she/her) @docaharper.bsky.social · 30/11/2025Yesterday I was enjoying quiet coastal Georgia with my family, and today I am headed to Paris for the first author meeting for the next #IPCC report. Sadly, the ecosystems we enjoyed, & my inlaws neighborhood, are at risk from rising sea levels if climate change continues unabated. 140
Reposted by Anna Harper (she/her)ESM2025 @esm2025.bsky.social · 24/11/2025Land-use strategies must account not only for C storage potential, but also for wider impacts on food systems, water resources & ecosystems:🔎bit.ly/4qMYPEy @docaharper.bsky.social @universityofga.bsky.social @exeter.ac.uk G.A. @pik-potsdam.bsky.social @rosieafisher.bsky.social @cicero.oslo.noesm2025.euCan We Count on the Land? Exploring the Uncertainty of Land-based Mitigation StrategiesHow Earth System Models assess land-based carbon removal (AR, BECCS): carbon-cycle responses, and local climate side-effects; and how Integrated Assessment Models then asses socio-economic constraints that shape decision-ready deployment. 054
Reposted by Anna Harper (she/her)Katharine Hayhoe @katharinehayhoe.com · 21/11/2025Nearly 30 countries refuse to sign a final #COP30 agreement that doesn't include "fossil fuel phase-out," as negotiations head into overtime. Live updates from @fionaharvey.bsky.social, @olliemilman.bsky.social and @theguardian.com here: www.theguardian.com/world/live/2... 1126288
Anna Harper (she/her) @docaharper.bsky.social · 19/11/2025Talking across disciplinary boundaries was challenging at times, but very rewarding and where the most progress can be made. Changing jobs and country mid-project was another challenge for me - I'm grateful for support from @exeter.ac.uk and @universityofga.bsky.social during the project. (End 🧵) 030
Anna Harper (she/her) @docaharper.bsky.social · 19/11/2025This work highlights the value of funding multi-year, international collaborations that bridge different modeling communities in this policy-relevant issue of land-based climate mitigation (5/) 130
Anna Harper (she/her) @docaharper.bsky.social · 19/11/2025We investigated how to include the climate (biophysical) impacts from afforestation and reforestation in IAM scenario development. Important impacts on agricultural yields, runoff, and carbon stocks were found, but a major challenge is how to account for uncertainty in the biophysical effects (4/) 120
Anna Harper (she/her) @docaharper.bsky.social · 19/11/2025Bioenergy crops with carbon capture and storage can be an effective mitigation method: the mitigation potential is higher when the crops are on existing agricultural land rather than natural land. To reduce impacts on food security, marginal or less productive agricultural land should be used (3/) 130
Anna Harper (she/her) @docaharper.bsky.social · 19/11/2025The land can help us mitigate climate change through growth of new forests and protection of existing forests & ecosystems, but *the ability of the land to continue to absorb carbon dioxide at current rates is not a sure bet* emphasizing the importance of reduced emissions to slow climate change(2/) 130
Anna Harper (she/her) @docaharper.bsky.social · 19/11/2025We uncovered systematic differences in how Earth System Models (ESMs) and Integrated Assessment Models (IAMs) calculate carbon stocks and carbon removal potentials, and this project allowed people from both groups to discuss ways to reduce this cross-sectoral model uncertainty in the future (1/) 120
Anna Harper (she/her) @docaharper.bsky.social · 19/11/2025Excellent summary of the work I contributed to in @esm2025.bsky.social, an EU-funded project that ends this year. Here are my key take-aways in a 🧵 , but I recommend reading this Research Highlight if you want to know more! Several papers are in preparation from this work, so stay tuned. 133