Anna Harper (she/her)
@docaharper.bsky.social
Climate, carbon cycle, Earth system modeling, and land based mitigation | Passionate about education and solutions-oriented projects | Assoc prof in Geography & Atmospheric Sciences at the University of Georgia | Views my own. Also ☕🏃🏼♀️🚴🏼♀🏊🏾♀️☕
Pinned
Greetings! 👋🏼 I'm a climate scientist studying the role of vegetation & soils in our future climate. I'm also a geography professor at UGA & a UGA alum (go Dawgs!).
I work with Earth system models (lots of desk time), so I get outside to enjoy nature and exercise as much as I can. We only have one 🌍
I work with Earth system models (lots of desk time), so I get outside to enjoy nature and exercise as much as I can. We only have one 🌍
Reposted by Anna Harper (she/her)
Attention 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/...
January 23, 2026 at 9:57 PM
Attention 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/...
Reposted by Anna Harper (she/her)
50. 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)
Withdrawing the United States from International Organizations, Conventions, and Treaties that Are Contrary to the Interests of the United States
MEMORANDUM 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
www.whitehouse.gov
January 8, 2026 at 1:44 AM
50. 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)
I'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.
Our ongoing webinar series is exploring how #AI is advancing frontiers in #weather and #climate forecasting.
Our final January 8 webinar will outline key messages from the series — focusing on issues of data democratization and AI trustworthiness: https://ow.ly/Gm7T50XS6Ao
Our final January 8 webinar will outline key messages from the series — focusing on issues of data democratization and AI trustworthiness: https://ow.ly/Gm7T50XS6Ao
January 7, 2026 at 6:46 PM
I'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.
Reposted by Anna Harper (she/her)
It 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.
Exclusive: The Trump administration is moving to dismantle the National Center for Atmospheric Research in Colorado, according to a senior White House official, taking aim at one of the world's leading climate research labs.
Trump moves to dismantle major US climate research center in Colorado
The Trump administration is breaking up the National Center for Atmospheric Research, taking aim at one of the world's leading climate research labs.
bit.ly
December 17, 2025 at 2:50 AM
It 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.
Reposted by Anna Harper (she/her)
TIL 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".
"This is to acknowledge that we know what is happening and what needs to be done. Only you know if we did it".
December 7, 2025 at 5:17 PM
TIL 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".
"This is to acknowledge that we know what is happening and what needs to be done. Only you know if we did it".
Reposted by Anna Harper (she/her)
The 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
bit.ly/4ir09cC
December 4, 2025 at 10:15 PM
The 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
bit.ly/4ir09cC
Reposted by Anna Harper (she/her)
@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.
December 6, 2025 at 5:28 AM
@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.
Great 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
✔️ 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
December 1, 2025 at 10:38 PM
Great 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
✔️ 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
This 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.
A 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.”
thebulletin.org
November 30, 2025 at 7:19 PM
This 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.
Yesterday 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.
November 30, 2025 at 12:55 AM
Yesterday 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.
Reposted by Anna Harper (she/her)
Land-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.no
@docaharper.bsky.social @universityofga.bsky.social @exeter.ac.uk G.A. @pik-potsdam.bsky.social @rosieafisher.bsky.social @cicero.oslo.no
Can We Count on the Land? Exploring the Uncertainty of Land-based Mitigation Strategies
How 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.
www.esm2025.eu
November 24, 2025 at 12:04 PM
Land-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.no
@docaharper.bsky.social @universityofga.bsky.social @exeter.ac.uk G.A. @pik-potsdam.bsky.social @rosieafisher.bsky.social @cicero.oslo.no
Reposted by Anna Harper (she/her)
Nearly 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...
Live updates from @fionaharvey.bsky.social, @olliemilman.bsky.social and @theguardian.com here: www.theguardian.com/world/live/2...
November 21, 2025 at 6:28 PM
Nearly 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...
Live updates from @fionaharvey.bsky.social, @olliemilman.bsky.social and @theguardian.com here: www.theguardian.com/world/live/2...
Excellent 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.
Several papers are in preparation from this work, so stay tuned.
Can we really count on land to deliver climate mitigation?
Our new highlight unpacks what AR/BECCS can do — and where uncertainties bite (carbon stocks, permanence, local climate effects).
Full story → bit.ly/4qMYPEy
#CDR #ESM2025research
@euclimateaction.bsky.social
Our new highlight unpacks what AR/BECCS can do — and where uncertainties bite (carbon stocks, permanence, local climate effects).
Full story → bit.ly/4qMYPEy
#CDR #ESM2025research
@euclimateaction.bsky.social
November 19, 2025 at 2:52 PM
Excellent 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.
Several papers are in preparation from this work, so stay tuned.
Reposted by Anna Harper (she/her)
COP30: Study reveals “highest possible ambition” for countries' climate pledges
With COP30 kicking off on Monday, a new paper by Julia Schönfeld and Professor Joeri Rogelj provides a framework for assessing countries’ climate pledges 🧵
Learn more: ow.ly/CiB050XnMK2
With COP30 kicking off on Monday, a new paper by Julia Schönfeld and Professor Joeri Rogelj provides a framework for assessing countries’ climate pledges 🧵
Learn more: ow.ly/CiB050XnMK2
COP30: Study reveals “highest possible ambition” for countries' climate pledges | Imperial News | Imperial College London
A new study, for the first time, shows how the ‘highest possible ambition’ of countries' climate pledges can be assessed.
ow.ly
November 6, 2025 at 2:07 PM
COP30: Study reveals “highest possible ambition” for countries' climate pledges
With COP30 kicking off on Monday, a new paper by Julia Schönfeld and Professor Joeri Rogelj provides a framework for assessing countries’ climate pledges 🧵
Learn more: ow.ly/CiB050XnMK2
With COP30 kicking off on Monday, a new paper by Julia Schönfeld and Professor Joeri Rogelj provides a framework for assessing countries’ climate pledges 🧵
Learn more: ow.ly/CiB050XnMK2
Happening tomorrow: National Academies webinar on AI for Emulation: Weather & Earth Systems Modeling, 10:00 ET. www.nationalacademies.org/event/45650_...
www.nationalacademies.org
September 22, 2025 at 8:10 PM
Happening tomorrow: National Academies webinar on AI for Emulation: Weather & Earth Systems Modeling, 10:00 ET. www.nationalacademies.org/event/45650_...
Ignoring the harmful effects of climate change will also affect national security.
Today, 20+ senior national security leaders submitted their critique of the DOE's climate report -- "wholly inadequate" for tackling the security risks posed by climate change. Signees include the former Commandant of the Coast Guard, PACOM commander & AFRICOM commander. Read their comment here:
20+ National Security Leaders and the Center for Climate & Security Critique the US Department of Energy Climate Report - The Council on Strategic Risks
CCS and nearly two dozen senior national security leaders find DOE’s latest climate report to be wholly inadequate in addressing the national security risk posed by climate change.
councilonstrategicrisks.org
September 2, 2025 at 5:14 PM
Ignoring the harmful effects of climate change will also affect national security.
Having spent much actual and emotional time and energy responding to this report, I whole-heartedly agree. Greenhouse gas emissions are bad for our planet, it's not a matter for debate.
To be clear, we really do not need to and should not be having to use our time 'debating' this fantastical nonsense in 2025. There are enough real bits of actual climate science to do. The collective brainpower expended on this by so many scientists could have been -much- better spent.
Great article in the NYTimes about our comment to the DOE about their climate report.
Gift link:
www.nytimes.com/2025/09/02/c...
Gift link:
www.nytimes.com/2025/09/02/c...
September 2, 2025 at 2:35 PM
Having spent much actual and emotional time and energy responding to this report, I whole-heartedly agree. Greenhouse gas emissions are bad for our planet, it's not a matter for debate.
Good things are happening today - the side entrance to my building is open again, so I no longer have to carry my bike up stairs and through the main entrance. It's the little things.
August 22, 2025 at 1:15 PM
Good things are happening today - the side entrance to my building is open again, so I no longer have to carry my bike up stairs and through the main entrance. It's the little things.
I'm excited to contribute to the next IPCC report as a lead author for the WG1 chapter on "Global projections of Earth system responses across scales". We'll be assessing forcings of climate change and the responses across the Earth systems, including my favorite component 🥁... the carbon cycle.
The #IPCC has announced the authors selected for its Seventh Assessment Report.
664 experts from 111 countries have been invited to participate as Coordinating Lead Authors, Lead Authors, & Review Editors.
🌍 51% from developing countries
🚺 46% women
🔗 bit.ly/AR7AuthorsPR
664 experts from 111 countries have been invited to participate as Coordinating Lead Authors, Lead Authors, & Review Editors.
🌍 51% from developing countries
🚺 46% women
🔗 bit.ly/AR7AuthorsPR
August 19, 2025 at 4:12 AM
I'm excited to contribute to the next IPCC report as a lead author for the WG1 chapter on "Global projections of Earth system responses across scales". We'll be assessing forcings of climate change and the responses across the Earth systems, including my favorite component 🥁... the carbon cycle.
Reposted by Anna Harper (she/her)
The recent DOE climate science report misrepresents the work of many researchers. Carbon Brief asked those cited to review the parts of the report where their work was used, and we collectively found 100+ misleading or false statements: interactive.carbonbr...
August 14, 2025 at 4:40 PM
The recent DOE climate science report misrepresents the work of many researchers. Carbon Brief asked those cited to review the parts of the report where their work was used, and we collectively found 100+ misleading or false statements: interactive.carbonbr...
Challenge: post your latest photo taken in DC to show what a hell-hole it is:
I went for a run on my own at 6:15am and felt perfectly safe the whole time.
I went for a run on my own at 6:15am and felt perfectly safe the whole time.
August 12, 2025 at 2:22 AM
Challenge: post your latest photo taken in DC to show what a hell-hole it is:
I went for a run on my own at 6:15am and felt perfectly safe the whole time.
I went for a run on my own at 6:15am and felt perfectly safe the whole time.
Sure, this is completely normal ...
This is the US Constitution page @ the Library of Congress
Sections 9 and 10 have been removed
9 includes habeas corpus, the courts' review of unlawful detention & imprisonment
This gov't can't change the Constitution w/ sneaky editing, but it's a new low: constitution.congress.gov/constitution/
Sections 9 and 10 have been removed
9 includes habeas corpus, the courts' review of unlawful detention & imprisonment
This gov't can't change the Constitution w/ sneaky editing, but it's a new low: constitution.congress.gov/constitution/
August 6, 2025 at 9:17 PM
Sure, this is completely normal ...
It's a great day to speak out against misinformation and lies designed to weaken climate regulation - follow the prompts below to enter your public comment on the EPA's proposed ditching of the Endangerment Finding.
🚨 It's day 6 of #31DaysofAction and EPA’s Endangerment Finding is under attack. That means your right to clean air is too.
✍️ Make your voice heard: Submit written comments at www.regulations.gov/document/EPA...
#StandUpForScience
✍️ Make your voice heard: Submit written comments at www.regulations.gov/document/EPA...
#StandUpForScience
Regulations.gov
www.regulations.gov
August 6, 2025 at 7:59 PM
It's a great day to speak out against misinformation and lies designed to weaken climate regulation - follow the prompts below to enter your public comment on the EPA's proposed ditching of the Endangerment Finding.
Reposted by Anna Harper (she/her)
“In his second administration, President Donald Trump is not just approaching climate science with skepticism. Instead, his administration is moving to destroy the methods by which his or any future administration can respond to climate change.“
Analysis: The US government has declared war on the very idea of climate change | CNN Politics
Americans are used to whiplash in their climate policy. The US has been in and out and in and out again of the key Paris climate agreement over the past four presidencies.
www.cnn.com
August 2, 2025 at 7:58 PM
“In his second administration, President Donald Trump is not just approaching climate science with skepticism. Instead, his administration is moving to destroy the methods by which his or any future administration can respond to climate change.“
Reposted by Anna Harper (she/her)
A few quick takes:
- the 'critical review' features a number of pretty standard and rebunked tropes.
- Spencer's 2024 (un-peer-reviewed) report for Heritage features strongly - and that was a hot mess of picked cherries: www.realclimate.org/index.php/ar...
- the 'critical review' features a number of pretty standard and rebunked tropes.
- Spencer's 2024 (un-peer-reviewed) report for Heritage features strongly - and that was a hot mess of picked cherries: www.realclimate.org/index.php/ar...
RealClimate: Spencer’s Shenanigans
RealClimate: A recent sensible-sounding piece by Roy Spencer for the Heritage foundation is full of misrepresentations. Let's play spot the fallacy.
www.realclimate.org
July 29, 2025 at 9:03 PM
A few quick takes:
- the 'critical review' features a number of pretty standard and rebunked tropes.
- Spencer's 2024 (un-peer-reviewed) report for Heritage features strongly - and that was a hot mess of picked cherries: www.realclimate.org/index.php/ar...
- the 'critical review' features a number of pretty standard and rebunked tropes.
- Spencer's 2024 (un-peer-reviewed) report for Heritage features strongly - and that was a hot mess of picked cherries: www.realclimate.org/index.php/ar...