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Kristen Sissener

@kristensissener.bsky.social
124 followers 191 following 14 posts

Executive Director @berkeleyearth.org Climate science, risk and adaptation, open data, and science philanthropy. 📍San Francisco

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Kristen Sissener @kristensissener.bsky.social · 05/08/2025
Looking forward to discussing what comes next for climate science after the challenges of the past six months. Listen live starting at 9am *today (Tuesday)
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Berkeley Earth @berkeleyearth.org · 06/06/2025
Berkeley Earth's next Monthly Climate Briefing will take place next Tues 6/10 at 8am PDT, where @rarohde.bsky.social, @hausfath.bsky.social, and Devin Rand will share the latest data and insights from our May 2025 Temperature Update. A live Q&A will follow. 🔗 To register: tinyurl.com/5ykbnjtm
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Robert Rohde @rarohde.bsky.social · 12/05/2025
Tomorrow will be the second press briefing in @berkeleyearth.org's new series discussing the monthly temperature report. us02web.zoom.us/webinar/regi... So if you want to learn a bit about how weather & climate have been evolving, join us. Designed for journalists, but open to anyone.
us02web.zoom.us
Welcome! You are invited to join a webinar: Berkeley Earth Monthly Press Briefing. After registering, you will receive a confirmation email about joining the webinar.
Join Berkeley Earth for our Monthly Press Briefing, where our scientists will present the latest global temperature data and analysis for April 2025. The 30-minute session will include a brief prese...
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Berkeley Earth @berkeleyearth.org · 07/05/2025
We're back! @rarohde.bsky.social @hausfath.bsky.social and Dr. Devin Rand will share our April 2025 global temperature findings in our next Monthly Press Briefing on Tues May 13 @ 8AM PDT, followed by live Q&A. Open to all! Space is limited..to register: 👉 tinyurl.com/mrx779xy #Climate #ClimateSky
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Zack Labe @zacklabe.com · 06/05/2025
"If you rely on these products in your work, research, education, or planning, we invite you to share your story at nsidc@nsidc.org. Your input can help us demonstrate the importance of these data sets and advocate for future support." - @nsidc.bsky.social
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Berkeley Earth @berkeleyearth.org · 30/04/2025
Attending #EGU25? Join us this Friday, where Devin Rand will be sharing a new approach to synthesizing CMIP6 ensembles, preserving model spread while clarifying signal for local decision making. Hope to see you in Session CL4.9! 🔗https://meetingorganizer.copernicus.org/EGU25/EGU25-13866.html
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Kristen Sissener @kristensissener.bsky.social · 17/04/2025
There’s still time to register for our #SFCW panel next week! (W/ wine 🍷 complements of Hafner Vineyards) See you there! #MindTheBridgeSF #SFClimateWeek
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Kristen Sissener @kristensissener.bsky.social · 15/04/2025
Many thanks to all who joined us this morning for our inaugural press briefing, expanding the reach of our open science. We’ll be back next month (with expanded capacity!). To read the full text of @berkeleyearth.org March Temperature Update: berkeleyearth.org/march-2025-t...
berkeleyearth.org
March 2025 Temperature Update - Berkeley Earth
March 2025 tied 2024 and 2016 for the warmest March on record. 2025 has a 34% chance to be a record warm. The brief La Niña has ended.
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Zeke Hausfather @zekehausfather.com · 14/04/2025
New from Berkeley Earth: We will be having a brief press briefing (~10 mins with slides, followed by Q&A) to accompany our March global surface temperature release. Tuesday April 15th, 11 AM ET / 8 AM PT / 5 PM CET Register here: us02web.zoom.us/webi...
us02web.zoom.us
Welcome! You are invited to join a webinar: Berkeley Earth Monthly Press Briefing. After registering, you will receive a confirmation email about joining the webinar.
Presenter: Dr. Robert Rohde, Chief Scientist, Berkeley Earth Host/Moderator: Kristen Sissener, Executive Director, Berkeley Earth Q&A Facilitator: Dr. Devin Rand, Research Scientist, Berkeley Earth Berkeley Earth invites you to our first-ever Monthly Press Briefing, where Dr. Robert Rohde will present and contextualize findings from our March 2025 Temperature Update. In this live, 30-minute session, we’ll cover: - Key takeaways from March 2025 Temperature Update - An overview of the current ENSO trends, including updates on the current La Niña conditions - Key drivers behind current climate and temperature trends - A live Q&A will follow the presentation This event marks the launch of a new monthly series designed to provide clear, timely insights from Berkeley Earth's team of independent climate scientists. Whether you're a journalist, policymaker, or simply climate-curious, you’ll leave better informed about the planet's latest signals. About Berkeley Earth: Berkeley Earth is a 501c3 nonprofit dedicated to delivering transparent, independent climate data and analysis. Our mission is to make scientific findings accessible and actionable for all, empowering informed dialogue and data-driven decision-making. As we move forward with some uncertainty around the continued availability of government reporting and analysis, we remain committed to making climate science open and accessible. This presentation will be geared towards climate journalists and media, but is open to the public. Please submit any questions to: admin@berkeleyearth.org Thank you!
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Kristen Sissener @kristensissener.bsky.social · 11/04/2025
@bsky.app - begging (again) for a save/bookmark feature... there are so many threads I want to read through but I only have two min to glance at them now in between calls. Begging 🙏
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Kristen Sissener @kristensissener.bsky.social · 11/04/2025
There's never a bad time to re-share this banger from @hausfath.bsky.social, but today feels like a particularly good one...
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ClimateFran @climatefran.bsky.social · 12/02/2025
California's public plan can't pay losses from the LA wildfires and is issuing the max $1 billion assessment on private insurers. Any further shortfalls will be assessed on the public directly A sharp acceleration in the downward spiral that is the CA insurance market www.nytimes.com/2025/02/11/c...
nytimes.com
California’s High-Risk Insurer Gets $1 Billion Bailout After L.A. Fires
The move will likely lead to higher costs for households across the state, and may push more insurers to leave, intensifying a home insurance crisis.
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Kristen Sissener @kristensissener.bsky.social · 28/01/2025
In nearly five years of Monday morning briefings - which included some pretty extreme stuff, such as the “gobsmackingly bananas” Sept 2023 anomaly - I’ve never seen @hausfath.bsky.social simply laugh like he did at the absurdity of January’s record trend. Wild times.
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Jake Schmidt - NRDC @jakeschmidt.bsky.social · 23/01/2025
It is hard to find the climate material from the Biden-Harris Administration WH now. It is all archived here (but isn't easy to search) in case you need links to the things that were revoked, etc they are all here (the WH archived page): bidenwhitehouse.archives.gov/briefing-room/
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Costa Samaras @costasamaras.com · 24/01/2025
Hey Federal and other public sector workers: we appreciate you and your work matters.
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Costa Samaras @costasamaras.com · 21/01/2025
If the social cost of carbon now has an unknowable official value, then the actual value can theoretically now be infinity. Checkmate
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Kristen Sissener @kristensissener.bsky.social · 21/01/2025
More than 60% of IRA clean energy projects - accounting for 80% of the investment dollars and 70% of jobs - are located in red congressional districts.
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David Roberts @volts.wtf · 20/01/2025
Hey #EnergySky: on Wed., I am talking to @hausfath.bsky.social about everyone's favorite subject, rock weathering! Specifically, weathering rocks as a way of capturing & sequestering CO2. Apparently this is the carbon removal method that might actually work at scale. Got any questions?
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Kristen Sissener @kristensissener.bsky.social · 16/01/2025
Finishing #AMS25 strong! Come find myself and Devin Rand in Room 243 this afternoon to close out a great week in NOLA. Hope to see you there.
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Daniel Swain @weatherwest.bsky.social · 09/01/2025
Is there a link between #ClimateChange & increasing risk/severity of #wildfire in California--including the still-unfolding disaster? Yes. Is climate change the only factor at play? No, of course not. So what's really going on? [Thread] #CAfire #CAwx #LAfires iopscience.iop.org/a...
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Robert Rohde @rarohde.bsky.social · 09/01/2025
It's almost time! @berkeleyearth.org's Global Temperature Report for 2024 will come out tomorrow. If you are a journalist who requested an embargoed copy, then you should have already received it. For new requests, or if it didn't arrive, please contact media@berkeleyearth.org
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Brian Kahn @blkahn.bsky.social · 09/01/2025
Stop me if you've heard this one but our infrastructure — down fire hydrants — is not ready for climate change www.bloomberg.com/news/article...
bloomberg.com
LA Fire Hydrants Running Dry Poses New Danger in Combating Blazes
As firefighters battle infernos that have caused billions in damages, a shortage of water is making their job harder.
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Kristen Sissener @kristensissener.bsky.social · 08/01/2025
Later today Berkeley Earth will be sending out an embargoed copy of our 2024 Annual Temperature Report, set for release on Friday Jan 10 at 8am PST. Journalists and others interested in receiving an early copy, pls email media@berkeleyearth.org ASAP to ensure you're included in the distribution.
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Zeke Hausfather @zekehausfather.com · 06/01/2025
Good Nature piece on the debate about accelerating warming in recent years, and what exceptionally high 2023 and 2024 temperatures might mean: www.nature.com/artic...
nature.com
Earth shattered heat records in 2023 and 2024: is global warming speeding up?
Nature - Nature examines whether the temperature spike is a blip or an enduring — and concerning — trend.
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Kristen Sissener @kristensissener.bsky.social · 06/01/2025
The biggest week for 2024 is the first week of 2025...@berkeleyearth.org will release our Annual Temperature Report on Friday Jan 10 at 8am PST, shedding light on what this year means for the Paris Agreement and future warming. Pls email media@berkeleyearth.org for an early embargoed copy.
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Robert Rohde @rarohde.bsky.social · 31/12/2024
2025 = 45^2 It's a perfect square. It will probably be the only perfect square year you ever get to live in. The last time that occurred was in 1936. The next will be in 2116. So, make 2025 a perfect year for you.
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Luis Villa @lu.is · 16/12/2024
Really a bummer how few open source conferences have taken this seriously. At best you tend to see streaming; very little activation of online community during or around the streaming. I know it’s hard and it isn’t a pure replacement for IRL human f2f but… still, we gotta try.
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Berkeley Earth @berkeleyearth.org · 12/12/2024
Clouds? Clouds?! If you missed @rarohde.bsky.social presentation at #AGU24 on the possible drivers behind recent extreme heat, @theguardian.com's Oliver Milman summarizes key takeaways from the session below ☁️ www.theguardian.com/environment/...
theguardian.com
Is it clouds, shipping or a volcano? Scientists present potential reasons for record heat
Climate researchers share theories behind apparent surge, though none have a full understanding yet of what has happened
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James P. Collins @jpcollins.me · 10/12/2024
“If you’re under a sky, you can flood.” — @kathiedello.bsky.social on Helene and “climate havens” #AGU24
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Kristen Sissener @kristensissener.bsky.social · 10/12/2024
Keeping “gobsmackingly bananas” alive as long as possible…don’t miss @rarohde.bsky.social @berkeleyearth.org talk on 2023’s extreme temps (and how these factors contributed to what’s likely to be a new ATH record-year in 2024) at #AGU24 today.
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Dave Vetter @davidrvetter.bsky.social · 10/12/2024
🚨NEW from me: Climate change caused over a third of weather-related insurance losses this century, and the insurance industry simply isn't ready for what's coming. Featuring @insureourfuture.bsky.social, with comment from @laurielaybourn.bsky.social. Special thanks to @thierryaaron.bsky.social!
forbes.com
Costs Pile Up As Climate Change Adds $600 Billion In Insurance Losses
Human-caused global warming has caused a third of weather-related insurance claims this century and the bill is rising fast, according to a new report.
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David Ho @davidho.bsky.social · 06/12/2024
Here’s the warming stripes for Zürich, Switzerland, representing temperature increase over time in the region. I was shocked to met a few Earth Scientists this week who had never seen nor heard of the stripes. Anyone else? showyourstripes.info
The image features a series of vertical stripes in varying shades of blue, peach, and red, creating a gradient effect across the canvas. It represents temperature increase over time in Zürich.
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Kelly Hereid @kellyhereid.bsky.social · 05/12/2024
Gotta say folks - nice to see the old EQtwitter gang getting back together over here.
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Zeke Hausfather @zekehausfather.com · 04/12/2024
A new perspective in Nature Climate Change argues that the discourse around climate tipping points risks "oversimplifying the diverse dynamics of complex natural and human systems and for conveying urgency without fostering a meaningful basis for climate action." www.nature.com/artic...
nature.com
‘Tipping points’ confuse and can distract from urgent climate action | Nature Climate Change
Tipping points have gained substantial traction in climate change discourses. Here we critique the ‘tipping point’ framing for oversimplifying the diverse dynamics of complex natural and human systems and for conveying urgency without fostering a meaningful basis for climate action. Multiple social scientific frameworks suggest that the deep uncertainty and perceived abstractness of climate tipping points render them ineffective for triggering action and setting governance goals. The framing also promotes confusion between temperature-based policy benchmarks and properties of the climate system. In both natural and human systems, we advocate for clearer, more specific language to describe the phenomena labelled as tipping points and for critical evaluation of whether, how and why different framings can support scientific understanding and climate risk management. The tipping points framing is widely used in climate discussions but receives mixed feedback. This Perspective critiques it for oversimplifying the complexities of natural and social systems and failing to drive effective action, and offers recommendations for future improvements.
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Robert Rohde @rarohde.bsky.social · 01/12/2024
I don't often agree with Ryan Maue, but we do agree that NOAA and the NWS are an enormous public good, whose weather monitoring and forecasts protect lives and property. Protecting NOAA's core mission (and enabling modernization) needs bipartisan agreement. www.nytimes.com/2024/12/01/o...
nytimes.com
Opinion | Republicans Would Regret Letting Elon Musk Ax Weather Forecasting (Gift Article)
Everyone benefits from government weather forecasting. Republicans have the chance to make it better.
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David Roberts @volts.wtf · 26/11/2024
New study finds that "primary care clinics that predominantly serve low-income and socially disadvantaged communities" are seeing severe impacts of climate change on care. link.springer.com/article/10.1...
link.springer.com
Frontline clinic perspectives on climate change, human health, and resilience: a national cross-sectional survey - BMC Primary Care
Background Frontline clinics - primary care clinics that predominantly serve low-income and socially disadvantaged communities - are facing increasing impacts from climate-related extreme events. This...
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Kristen Sissener @kristensissener.bsky.social · 25/11/2024
@berkeleyearth.org is officially on Bluesky! Kicking off with a sobering October temperature update…while Berkeley Earth had 2023 just north of 1.5C for the first time ever, 2024 is on track to eclipse that milestone and set a new all-time record. More details available in the 🧵 below.
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Andrew Dessler @andrewdessler.com · 22/11/2024
IT'S HAPPENING! News organizations are starting to realize that they need to allow sharing directly to @bsky.app. In this case, @gristnews.bsky.social has added a button to share stories! So go read Grist's great articles and share your favorites here.
"Screenshot of a Grist article page, showing a drop-down menu for sharing options, including 'BlueSky,' highlighted at the bottom of the menu.
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David Ho @davidho.bsky.social · 20/11/2024
We used to motivate our science proposals with the need for research to understand what to do about climate change. Those days are over. Now we should motivate our proposals with the need for research to understand how dangerous the world will get if we continue to do nothing about climate change.
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Justin S. Mankin @jsmankin.bsky.social · 19/11/2024
As the governments of the world commit humanity to sailing by 1.5°C, a friendly reminder that our level of societal risk aversion—not science—remains the major uncertainty in setting the carbon budget. From Mathez & Smerdon, 2018, itself adapted from Meinshausen et al., 2009.
Likelihood of exceeding a 2°C temperature target as a function of cumulative CO2 emissions. Scientific uncertainty is dwarfed by risk aversion uncertainty.
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Copernicus ECMWF @copernicusecmwf.bsky.social · 19/11/2024
Today at the #COP29 event on climate scenarios, #C3S director Carlo Buontempo highlighted that the near real-time production of climate data has attracted new attention and audiences who are asking interesting questions, e.g., about the Honga-Tonga effect, and the reasons for the sharp rise in CH4.🧵
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David Ho @davidho.bsky.social · 19/11/2024
Paris’ new 2024-2030 Climate Plan drop speed limits, repurpose traffic lanes, remove 60,000 parking spots and create urban “oases” to combat extreme heat…
bloomberg.com
Paris to Replace Parking Spaces With Trees
The city’s new climate plan promises to drop speed limits, repurpose traffic lanes, remove 60,000 parking spots and create urban “oases” to combat extreme heat.
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Richard Waite @waiterich.bsky.social · 18/11/2024
One way we know Bluesky has the juice is because the starter packs used to be super generic like “Environmentalists 😀” and now they are super specific like “North Atlantic salmonid fisheries scientists whose names start with T-Z” and they have the full 150 people in them
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Copernicus ECMWF @copernicusecmwf.bsky.social · 18/11/2024
9 of the first 10 months this year, and 15 of the last 16 months exceeded 1.5°C global average surface air temperature compared to pre-industrial levels. More information on the 1.5°C limit: climate.copernicus.eu/why-do-we-ke...
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Dr. Samantha Montano @samlmontano.bsky.social · 16/11/2024
Disasters are political. Risk creation is political. Risk reduction is political. Emergency management is political. Disaster science is political. Pretending it isn’t gets people killed and communities destroyed.
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Lisa Patel, MD @lisapatel.bsky.social · 15/11/2024
1 in 5 deaths worldwide are due to the burning of #fossilfuels www.hsph.harvard.edu/c-change/new....
hsph.harvard.edu
Fossil fuel air pollution responsible for 1 in 5 deaths worldwide
New research finds that deaths from fossil fuel emissions are higher than previously thought—more than 8 million people per year, worldwide.
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Kelly Hereid @kellyhereid.bsky.social · 14/11/2024
Welcome to bsky @jsmankin.bsky.social! You may know him from, among other things, this killer NYT op-ed (🎁 link):
nytimes.com
Opinion | The People Have a Right to Climate Data
Information about climate risks is becoming increasingly valuable to companies that want to sell it.
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Jake Schmidt - NRDC @jakeschmidt.bsky.social · 13/11/2024
Leading Multilateral Development Banks (MDBs) announced that they would increase their climate finance to $120 billion by 2030 for low- and middle-income countries – up from the $75 billion they provided in 2023: thedocs.worldbank.org/en/doc/bedea...
thedocs.worldbank.org
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Nicholas D Carter @nicholasdcarter.bsky.social · 13/11/2024
Denmark gets it. 🌳Restoring 140,000ha of peatlands in ag use & establish 250k ha of new forest 💲Pay farmers $100/t to reduce GHG & water pollution from nitrogen fertilization 🍖Meat tax redirects $ to farmers eco efforts www.wri.org/insights/den... +their plant-based plan: en.fvm.dk/news-and-con...
wri.org
Denmark’s Groundbreaking Agriculture Climate Policy Sets Strong Example for the World
Denmark’s Green Tripartite Agreement imposes taxes on livestock, restores forests and peatlands, and pays farmers to reduce pollution.
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