Jean-Pascal van Ypersele
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jpvanypersele.bsky.social
Jean-Pascal van Ypersele
@jpvanypersele.bsky.social
2.3K followers 180 following 15 posts
IPCC Vice-Chair for AR5, climate physicist, convinced that we can improve the well-being of all those who need it. Science, justice, empathy, sustainability without greenwashing, gender equality, listening to youth🌍🔭
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Reposted by Jean-Pascal van Ypersele
jpvanypersele.bsky.social
« The National Oceanic and Atmospheric Administration (NOAA) plays a vital role in the United States' ability to anticipate and respond to short- and long-term threats to security, health, and resilience. » This vital role is under threat. Please read👇
costasamaras.com Costa Samaras @costasamaras.com · Jun 19
Here’s the first page of our new article on the value of NOAA to the United States, which starts on page ~175~ of this free PDF book.

In the business, posting a full page of text with refs and footnotes as part of a giant PDF is called a ~teaser~

cepr.org/publications...
CHAPTER 13 Downsizing the National Oceanic and Atmospheric Administration Valerie J. Karplus and Costa Samaras Carnegie Mellon University The National Oceanic and Atmospheric Administration (NOAA) plays a vital role in the United States' ability to anticipate and respond to short- and long-term threats to security, health, and resilience. NOAA is an agency within the Department of Commerce that tracks and predicts changes in weather, climate, coastal lands, and oceans, enabling actions that prevent damage to life and property. From avoiding deaths due to extreme weather, to averting collisions of objects in space, to informing decisions of farmers and fishers, NOAA offices constantly generate trusted, open information that has profound, tangible benefits for people and businesses. NOAA is facing the potential of losing more than 25% of its current $6 billion budget.' Without NOAA, the US economy will be no match for everyday events, and woefully unprepared for climate change. As one of the world's premier weather and climate change research agencies, NOAA provides data, tools, and information to help advance the scientific understanding of climate change and its impacts.? Essential weather data used widely across both the public and private sectors in the US originates with NOAA.' Helping the public and businesses understand how heat,* drought,' floods," sea level rise,' and other hazards are changing can allow communities to better prepare for climate change and manage impacts. However, risk from climate impacts is a combination of how hazards change, if people and infrastructure are in harm's way of these hazards, and how vulnerable these communities are to damages when extreme weather shows up. NOAA connects these concepts and serves as a critical climate resilience agency, enabling communities to assess climate risks and take action.® NOAA provides on-the-ground resources for communities to build up the local workforce and capacity
June 21, 2025 at 1:49 AM
Reposted by Jean-Pascal van Ypersele
manonglobensky.bsky.social
Les États-Unis font la guerre à la science du climat.

« C’est une tentative de mise en cause de la solidité scientifique du lien entre ce réchauffement et les émissions de gaz à effet de serre », dit @jpvanypersele.bsky.social ‬ ancien vice-président du GIEC

ici.radio-canada.ca/ohdio/premie...
La science du climat à l’épreuve | OHdio | Radio-Canada
Écoutez l’extrait de l’émission Tout terrain : La science du climat à l’épreuve
ici.radio-canada.ca
August 10, 2025 at 4:40 PM
Reposted by Jean-Pascal van Ypersele
jksteinberger.bsky.social
🥳🚨🤩 Job opportunity with me at Uni Lausanne working on the REAL project!

2 year Postdoctoral position in postgrowth climate mitigation modelling focused on food, biomass, land-use

Link here for details and application. Deadline 15 Sept!
tinyurl.com/33rfw3xz
Opportunités de carrière : Postdoctoral position in postgrowth climate mitigation modelling focused on food, biomass, land-use (22432)
tinyurl.com
August 15, 2025 at 8:53 AM
Reposted by Jean-Pascal van Ypersele
climateofgavin.bsky.social
Ralph Keeling in The Economist

www.economist.com/by-invitatio...
Donald Trump’s war on climate science has staggering implications
Even a policy of “drill, baby, drill” would imply more climate research, not its evisceration, says Ralph Keeling
www.economist.com
August 7, 2025 at 12:35 PM
Reposted by Jean-Pascal van Ypersele
jessfanzo.bsky.social
We members of the Standing Together for Nutrition Consortium raise our voices against the intentional deprivation of food and aid in Gaza, and in other countries, including Sudan, South Sudan, and Yemen. The Lancet commentary: shorturl.at/oGYqA. ST4N call to action: shorturl.at/Jssyb
The famines in Gaza and other conflict areas are a moral failure
As scientists and members of the Standing Together for Nutrition Consortium (ST4N) who have been Standing Together For Nutrition during recent crises, we use evidence of the impact of crises on nutrit...
www.thelancet.com
July 30, 2025 at 11:03 PM
jpvanypersele.bsky.social
Offre d’emploi dans mon équipe de la Plate-forme wallonne pour le #GIEC. Date limite: 21 juillet minuit.
July 3, 2025 at 10:12 AM
jpvanypersele.bsky.social
Today! #ShowYourStripes
June 21, 2025 at 2:59 AM
jpvanypersele.bsky.social
« The National Oceanic and Atmospheric Administration (NOAA) plays a vital role in the United States' ability to anticipate and respond to short- and long-term threats to security, health, and resilience. » This vital role is under threat. Please read👇
costasamaras.com Costa Samaras @costasamaras.com · Jun 19
Here’s the first page of our new article on the value of NOAA to the United States, which starts on page ~175~ of this free PDF book.

In the business, posting a full page of text with refs and footnotes as part of a giant PDF is called a ~teaser~

cepr.org/publications...
CHAPTER 13 Downsizing the National Oceanic and Atmospheric Administration Valerie J. Karplus and Costa Samaras Carnegie Mellon University The National Oceanic and Atmospheric Administration (NOAA) plays a vital role in the United States' ability to anticipate and respond to short- and long-term threats to security, health, and resilience. NOAA is an agency within the Department of Commerce that tracks and predicts changes in weather, climate, coastal lands, and oceans, enabling actions that prevent damage to life and property. From avoiding deaths due to extreme weather, to averting collisions of objects in space, to informing decisions of farmers and fishers, NOAA offices constantly generate trusted, open information that has profound, tangible benefits for people and businesses. NOAA is facing the potential of losing more than 25% of its current $6 billion budget.' Without NOAA, the US economy will be no match for everyday events, and woefully unprepared for climate change. As one of the world's premier weather and climate change research agencies, NOAA provides data, tools, and information to help advance the scientific understanding of climate change and its impacts.? Essential weather data used widely across both the public and private sectors in the US originates with NOAA.' Helping the public and businesses understand how heat,* drought,' floods," sea level rise,' and other hazards are changing can allow communities to better prepare for climate change and manage impacts. However, risk from climate impacts is a combination of how hazards change, if people and infrastructure are in harm's way of these hazards, and how vulnerable these communities are to damages when extreme weather shows up. NOAA connects these concepts and serves as a critical climate resilience agency, enabling communities to assess climate risks and take action.® NOAA provides on-the-ground resources for communities to build up the local workforce and capacity
June 21, 2025 at 1:49 AM
jpvanypersele.bsky.social
J’étais invité ce soir dans le grand JT de 18h de @TV5MONDE. On y a parlé canicule, objectif de 1.5°C et ce que l’on peut faire (citoyens, gouvernements, acteurs économiques) pour limiter les dégâts. Rediffusion:
m.youtube.com/watch?v=YIuP...
#UrgenceClimatique
Europe : La canicule n'attend même plus l'été
YouTube video by TV5MONDE Info
m.youtube.com
June 20, 2025 at 9:51 PM
Reposted by Jean-Pascal van Ypersele
jpvanypersele.bsky.social
Shocking! Evicting this very important climate lab from its New York office is the latest act of war against science by the Trump administration. Ultimately, no economy can flourish while neglecting science. This is barbarian. Full solidarity with all GISS personnel! #WarAgainstScience
katharinehayhoe.com Katharine Hayhoe @katharinehayhoe.com · May 31
NASA’s iconic Goddard Institute for Space Studies—home to Jim Hansen and hundreds more scientists, creator of the GISS model and keeper of the global temperature record—has been evicted from its longstanding NYC office above the “Seinfeld” restaurant.

Why? The government told them to move out.
June 1, 2025 at 7:13 AM
Reposted by Jean-Pascal van Ypersele
jpvanypersele.bsky.social
This should be in top media headlines everywhere. Humanity clearly moves in the wrong direction: adding more and more thermal insulation around the planet, which is already too warm! It is urgent to decarbonise our economies and ways of life. #ClimateEmergency
June 10, 2025 at 4:31 AM
jpvanypersele.bsky.social
This should be in top media headlines everywhere. Humanity clearly moves in the wrong direction: adding more and more thermal insulation around the planet, which is already too warm! It is urgent to decarbonise our economies and ways of life. #ClimateEmergency
June 10, 2025 at 4:31 AM
Reposted by Jean-Pascal van Ypersele
sustainable2050.bsky.social
Based on daily values, the May average of atmospheric CO₂ at Mauna Loa was ~430.5 ppm; that's 3.6 ppm higher than last year, a big jump again!
#co2 #climatechange #globalwarming
Graph showing daily, weekly and monthly values for the past 13 months. Concentration now near its seasonal high.
June 1, 2025 at 3:05 PM
jpvanypersele.bsky.social
La guerre de Trump contre les sciences du climat. Article à relire alors que le GISS, l’un des principaux centres de recherche mondiaux sur le climat, vient d’être expulsé de ses bureaux 👇#WarAgainstScience
June 1, 2025 at 7:41 AM
Reposted by Jean-Pascal van Ypersele
jpvanypersele.bsky.social
Governments of rich countries need to understand that investing money in climate action today will cost much less over time than waiting for the bill that Nature will send us if we continue to mistreat her.
COP30 in Bélem will need to deliver much more.
November 24, 2024 at 12:20 PM
Reposted by Jean-Pascal van Ypersele
crampell.bsky.social
Trump Has Cut Science Funding to Its Lowest Level in Decades www.nytimes.com/interactive/...
Trump Has Cut Science Funding to Its Lowest Level in Decades
The lag in funding extends far beyond D.E.I. initiatives, affecting almost every area of science: chemistry, computing, engineering, materials and more.
www.nytimes.com
May 22, 2025 at 2:16 PM
Reposted by Jean-Pascal van Ypersele
jaylyall.bsky.social
As of today, Elon Musk is thought to be responsible for the death of 300,000 adults and kids due to the illegal closure of USAID (source: www.impactcounter.com/dashboard?vi...)

That's a 103 deaths per hour, each day. And it will get worse.

His legacy is one of death, destruction, and failure.
May 30, 2025 at 1:57 AM
jpvanypersele.bsky.social
Shocking! Evicting this very important climate lab from its New York office is the latest act of war against science by the Trump administration. Ultimately, no economy can flourish while neglecting science. This is barbarian. Full solidarity with all GISS personnel! #WarAgainstScience
katharinehayhoe.com Katharine Hayhoe @katharinehayhoe.com · May 31
NASA’s iconic Goddard Institute for Space Studies—home to Jim Hansen and hundreds more scientists, creator of the GISS model and keeper of the global temperature record—has been evicted from its longstanding NYC office above the “Seinfeld” restaurant.

Why? The government told them to move out.
June 1, 2025 at 7:13 AM
Reposted by Jean-Pascal van Ypersele
katharinehayhoe.com
Thankfully, the village was evacuated already, but one person is missing and everyone else’s homes are destroyed.

Make no mistake: this is a climate disaster.
Swiss village almost entirely destroyed after collapse of glacier buries it in mud
One person missing and Blatten devastated after huge cloud of ice and rubble inundates evacuated town
www.theguardian.com
May 29, 2025 at 1:23 AM
Reposted by Jean-Pascal van Ypersele
petergleick.bsky.social
You are here.
We've breached 430 ppm CO2.
#climatechange
Graph of CO2 concentrations for the past 800,000 years from the Antarctic ice cores, showing current CO2 levels of 430 ppm are far, far higher than any level over this period, which never exceeded 300 ppm. Also shown is the emergence of Homo sapiens around 200,000 years ago -- so CO2 levels are higher than we've ever experienced.
April 22, 2025 at 11:09 PM
Reposted by Jean-Pascal van Ypersele
vmerckx.bsky.social
Collega Marie Wagemans en ik spraken met @tdiliberto.bsky.social, een van de meer dan 1000 ontslagen personeelsleden van de Amerikaanse atmosfeerdienst NOAA. Hun werk is onmisbaar voor de wereldwijde klimaatwetenschap. @jpvanypersele.bsky.social

www.vrt.be/vrtnws/nl/20...
"Griezelige tijden": meteoroloog Tom moest vertrekken bij 'KMI van VS' en waarschuwt voor wereldwijde gevolgen van ontslaggolf
www.vrt.be
April 5, 2025 at 7:22 AM
Reposted by Jean-Pascal van Ypersele
joliraton.bsky.social
C'est dur parce que ça tape proche. Mon Alma mater messieurs dames :
December 8, 2024 at 5:43 AM
Reposted by Jean-Pascal van Ypersele
o-stock.bsky.social
En amont de la COP29, des collégiens ont interviewé le climatologue et ancien vice-président du GIEC
@jpvanypersele.bsky.social .

📻 sites.ac-nancy-metz.fr/eco-radio/in...

(8/10)
Entretien avec le Professeur Jean-Pascal van YPERSELE
La COP 29 aura lieu en Azerbaïdjan du 11 au 22 novembre. A cette occasion l'équipe d'Eco Radio vous propose une série de podcast sur le thème des changements climatique. Pour en savoir plus sur les ch...
sites.ac-nancy-metz.fr
December 6, 2024 at 12:26 PM
Reposted by Jean-Pascal van Ypersele
wsmbelgium.bsky.social
Aux négociateurs de l'Arizona : Investir dans la Coopération Au Développement, c'est préparer un monde plus juste, solidaire et durable ! @jpvanypersele.bsky.social
January 31, 2025 at 9:49 AM
Reposted by Jean-Pascal van Ypersele
jpvanypersele.bsky.social
Indeed! Not investing in climate action now means people will have to pay for the losses climate change are causing. #ClimateEmergency
brenttoderian.bsky.social Brent Toderian @brenttoderian.bsky.social · Dec 11
The financial costs of the #ClimateCrisis “are now starkly apparent to Americans in the form of soaring home insurance premiums – with those in the riskiest areas for floods, storms and wildfires suffering the steepest rises of all.”

“A climate crisis is starting to stir an insurance crisis.”
How climate risks are driving up insurance premiums around the US – visualized
‘Tight correlation’ between premium rises and counties deemed most at risk from climate crisis, experts say
www.theguardian.com
December 11, 2024 at 5:33 AM