Allison Crimmins

🚨 JUST PUBLISHED 🚨

⚠️ The 2025 @lancetcountdown.bsky.social report reveals climate change inaction is costing lives and livelihoods, and harming the economy.

❤️‍🩹 Protecting people’s health demands all hands on deck.

Read more: www.lancetcountdown.org/2025-report/ #LancetClimate25

U.S. Billion-Dollar Weather and Climate Disasters | Climate Central Explore U.S. billion-dollar weather and climate disasters since 1980, including total costs, trends, and impacts.

Today, the U.S. faces one billion+ dollar climate/weather disaster on average every 2w. That's a massive increase from one every 4m in the 1980s.

This is 'global weirding' and people are taking notice!

The government told NOAA to stop tracking these events: but @climatecentral.org is on the job.

Climate change impacts on tropical cyclone–induced power outage risk: Sociodemographic differences in outage burdens | PNAS This research investigates the projected risks of future climate trends on tropical cyclone–induced power outages in the Gulf and Atlantic coast of...

New paper from @marcusmarcusrc.bsky.social and team on the impacts of future climate trends on tropical cyclone–induced power outages. Spoiler: disproportionate risks for Hispanic, non-White, and low-income populations and huge increase in annual costs of outages.
www.pnas.org/doi/10.1073/...

Also, personal life achievement unlocked- I cited @theonion.com in a scientific paper. :)

Innovations in the climate assessment development process - Climatic Change Climate assessments have long been key scientific inputs that inform the development of productive and impactful climate policy in the United States and around the world. This introduction sets the stage for the suite of papers in the Topical Collection “Advancements in U.S. Climate Assessments.” Inspired and informed by the release of the Fifth National Climate Assessment, the papers within this issue document lessons learned over the past 30+ years and leverage the perspectives of previous assessment authors and staff to aid those interested in developing their own climate assessments. This paper reviews the evolution of climate assessments and the factors that make for useful, usable, and used scientific products to support societal choices. Evolving user needs over the last 30+ years also reflect a shift in demand towards more localized or more context-specific climate data that integrates social science information, tools, and frameworks. To meet these needs, we highlight three areas of potential opportunity and challenge for future assessments: continued and strengthened conversations between assessment developers across geographic scale to share innovations and lessons learned in the development process; working with knowledge holders in under-represented areas of expertise to alter assessment governance and guidelines to better incorporate diverse perspectives; and seizing opportunities for using innovative communication and engagement mediums.

One more paper in this series- the introductory paper was published yesterday amid the shutdown. Innovations in the climate assessment development process discusses the value of scientific assessments and how to keep them evolving to meet evolving user needs.
link.springer.com/article/10.1...

📢 Submissions are now open for the U.S. Climate Collection, a joint @theAGU + @ametsoc initiative.

This special collection will publish U.S.-focused climate assessment science that’s free to read, ensuring rigorous, accessible science informs decisions for years to come.

🔗 buff.ly/1tHUSLC

Fifth National Climate Assessment The Fifth National Climate Assessment is the US Government’s preeminent report on climate change impacts, risks, and responses. It is a congressionally mandated interagency effort that provides the sc...

Here is the working link: nca5.climate.us

Thank you

DOE CWG STATEMENT (second paragraph of section 2.1.1, page 3): “Piao et al. (2020) noted that greening was even observable in the Arctic.” COMMENT: This statement implies that the Arctic greening signal was caused by elevated CO2 , however that is not the scientific consensus. Piao et al. (2020) attribute the greening trend in the Arctic predominantly to growing season length driven by warmer temperatures (see also Y. Zhang et al., 2022). Piao et al. (2020) also note that this positive impact of increasing temperatures appears to have weakened over the past four decades, “suggesting a possible saturation of future greening in response to warmer temperature” (see also comment on greenness trends related to Section 2.1.1, first sentence of Page 4). It is also important to put Arctic greening more broadly into the context of the carbon cycle and other impacts. While above-ground plants may have displayed more leaf area over the past decades, rising temperatures also thaw permafrost and drive accelerated decomposition in highly carbon rich soils (Turetsky et al., 2020), a process which is expected to accelerate as climate continues to warm (Miner et al., 2022). Thus even with Arctic greening, high latitude terrestrial systems may become net carbon sources to the atmosphere, causing an amplifying feedback (Braghiere et al., 2023). Other risks to the Arctic linked to higher CO2 levels and rising temperatures are not mentioned in this report (Virkkala et al., 2025). The Arctic is warming at a rate of 2 to 3 times the global average, leading to thawing of permanently frozen soils (permafrost), with downstream impacts including loss of structural support for buildings and subsidence, threatening communities, roads, runways, and other assets across Alaska (Manos et al., 2025; University of Alaska Fairbanks Institute of Northern Engineering US Army Corps of Engineers Alaska District & Laboratory, 2019).

Our comment on the DOE CWG report is done. It tips the scales at 439 pages, approx. 3x longer than the DOE report.
This is related to Brandolini's law: The amount of energy needed to refute bullshit is an order of magnitude bigger than that needed to produce it.

Example: refuting one sentence.

DOE climate report response form We are collecting names to assemble a writing team to respond to the DOE climate working group report. If you'd like to contribute, enter your info below. At this point, there is no guarantee what we'll do (if anything), but we want to keep our options open by collecting names. If you have any further questions, feel free to email me. We are primarily looking for Ph.D. scientists at universities or government labs in appropriate fields. I realize that this will exclude some qualified people and I apologize, but we felt this was necessary for a variety of reasons.

🚨 If you're interested in working on a coordinated response to the DOE climate report, please enter your info on this google form 🚨

Please RT this so as many people see it as possible.

forms.gle/BL9xUAfRxA...

Clip from Buffy the Vampire Slayer showing Buffy saying “I’m the thing that monsters have nightmares about”

Oh you’re taking public comments?

Today is #ShowYourStripes Day 🔵🔴

A single image. A century of data.
Every city, state, county -- the planet -- has an impact of climate change story — and the stripes show it.

Post yours. Highlight the warming where you live.
Start the conversation.

Looking forward to hearing more tonight! peoplesbooktakoma.com/event/human-...

Public engagement in climate assessment: lessons and opportunities - Climatic Change Cyclical and sustained engagement throughout and beyond individual climate assessment cycles ensures that assessments (1) meet the user need of the moment; (2) reach the broadest possible decision-mak...

Led by Allyza Lustig, this paper reviews methods of public engagement across national, regional, state, Tribal, and local assessments, providing lessons learned to ensure assessments meet evolving user needs and link knowledge development to societal responses.
link.springer.com/article/10.1...

The social sciences in climate assessments in the United States - Climatic Change This article looks at the inclusion of the social sciences in recent climate assessment reports from national and sub-national jurisdictions (state, territory, district) of the United States. It compa...

Led by Keely Maxwell, this paper compares integration of social sciences in national and sub-national assessments, noting where non-traditional report structures open space for innovation and where emergent themes and other disciplines can improve future assessments
link.springer.com/article/10.1...

All right! Two more papers released in our special issue series on advancements in climate assessments. The 9th paper is "The social sciences in climate assessments in the United States" and the 10th is "Public engagement in climate assessment: lessons and opportunities"

Kate Marvel & Friends: Feeling Climate Change Tickets for Kate Marvel & Friends: Feeling Climate Change in New York from NYPL. The climate scientist is joined by a group of special guests to share insights, data, and stories that reflect how it f...

In NYC June 16? You’re invited to my book launch!!! It’s at the beautiful New York Public Library and it’s free and I can’t wait to see you there
www.nypl.org/events/progr...

Most Americans use federal science information on a weekly basis, a new poll finds Most Americans frequently use federal science information. But few are concerned that cuts to federal science spending could affect their access to such information, a new poll finds.

Most Americans frequently use federal science information. But few are concerned that cuts to federal science spending could affect their access to such information, a new poll finds.

AGU and AMS join forces on special collection to maintain momentum of research supporting the U.S. National Climate assessment Congressionally mandated, the NCA draws on the latest scientific research to evaluate how climate change is affecting the United States. The new special collection does not replace the NCA but instead...

Last week, the govt dismissed 400 researchers working on the US National Climate Assessment. I was one of them. Today, @agu.org & @ametsoc.org announced they are joining forces to sustain the momentum. It's not a replacement, it's a reminder that science is unstoppable. news.agu.org/press-releas...

Working on the NCA5 was amazing. It was genuinely moving to be surrounded by so much dedication and sheer scientific and administrative *excellence*. I think we’ve forgotten how to believe in good things, but this was one of them.

And yet it moves

Centering environmental justice in United States (U.S.) National Climate Assessments (NCAs): a historical and contemporary analysis - Climatic Change Since 1990, the U.S. Global Change Research Program has published five cross-sectoral National Climate Assessment (NCA) reports. Federal, state, and local governments, policymakers, and the public emp...

The 8th paper in our series is "Centering environmental justice in United States National Climate Assessments". This awesome analysis makes the case for centering EJ to inform actionable, relevant, and accessible climate change science and responses.
link.springer.com/article/10.1...

Analysis of nature-related themes and terminology in U.S. climate assessments - Climatic Change “Nature” is a broad term with neither a standard definition nor consistent use, even across federal reports like the National Climate Assessment (NCA). The process of defining complex topics like “nat...

Also published today is an "Analysis of nature-related themes and terminology in U.S. climate assessments" led by Emerson Conrad-Rooney at @bostonu.bsky.social. It looks at the use of nature-related themes over 5 NCAs to inform future nature and climate assessments.
link.springer.com/article/10.1...

Projections of future climate for U.S. national assessments: past, present, future - Climatic Change Climate assessments consolidate our understanding of possible future climate conditions as represented by climate projections, which are largely based on the output of global climate models. Over the ...

In sadly ironic timing, the next paper in our series is "Projections of future climate for U.S. national assessments: past, present, future". This paper reviews the use of climate projections across NCAs and reflects on lessons learned to meet evolving user needs.
link.springer.com/article/10.1...

Untrue, uninformed, harmful, and irresponsible

Reflections on preparing regional chapters for NCA5 - Climatic Change Regional chapters in the National Climate Assessment (NCA) report provide a comprehensive synthesis of how climate change is impacting United States regions and are extensively used to support climate...

The next paper in this series is out! In "Reflections on preparing regional chapters for NCA5", an expert team of regional chapter authors provide reflections on the assessment process and identify some best practices for developing an effective regional chapter.
link.springer.com/article/10.1...

The cover of the report shows artwork called Sister Spirits by Kylie Wanatee, age 19, Rosebud Sioux Tribe. The artist's statement reads "This is a 24 x 36 gouache painting of the Three Sisters: the Corn, the Bean, and the Squash. Indigenous Peoples throughout North America cultivate varieties of this trio because of their ability to thrive once planted together; this is known as companion planting. The top sister is the corn stalk, the bottom right sister is the squash, as her dress becomes the shade that keeps the soil moist, and the bottom left sister is the bean that grows hanging onto the corn stalk.”

Very excited to see the release of the 2nd Status of Tribes and Climate Change (STACC) Report! Congratulations to ITEP and all the authors, artists, and contributors for this massive undertaking and critical work!
www.nau.edu/staccreport

Nominations open for IPCC 7th Assessment Report Cycle The U.S. Academic Alliance for the IPCC (USAA-IPC) opened an application portal inviting U.S. nominations for the IPCC 7th Assessment report. Apply here: https://www.agu.org/ipcc-nominations Deadline: 4 April 2025

US climate researchers and practitioners interested in contributing to the @ipcc.bsky.social Seventh Assessment Report - apply by April 4! www.agu.org/ipcc-nominat...

Broadening diversity, equity, accessibility, and inclusion in the process and development of climate assessments - Climatic Change Comprehensive assessments of scientific knowledge are essential to inform efforts to mitigate greenhouse gas emissions and adapt to climate change impacts. The Fifth National Climate Assessment (NCA5)...

Led by Eric Chu, this timely letter reflects on the impacts and limitations of DEAI efforts in NCA development. The authors include recommendations on how to apply DEAI principles to further promote collaboration and guide more just and holistic climate assessments. link.springer.com/article/10.1...