Sign in

Giacomo Grassi

@giacgrassi.bsky.social
931 followers 102 following 125 posts

Scientist @EU_Commission's Joint Research Centre. Forests, carbon and climate in the science/policy interface. Member #IPCC task force Bureau #AR7. Views mine.

PostsRepliesMedia
Giacomo Grassi @giacgrassi.bsky.social · 17/06/2026
⚔️ Le guerre non distruggono solo il presente. Divorano il futuro, due volte: aumentando le emissioni e distruggendo la fiducia necessaria per ridurle. Ne abbiamo scritto con Matteo Motterlini su @climalteranti.bsky.social www.climalteranti.it/2026/06/11/i...
climalteranti.it
In un clima di guerra, il multilateralismo climatico è ancora vivo
Il vero costo climatico delle guerre non si misura in CO₂, ma in fiducia bruciata: quella tra gli Stati, da cui dipende ogni cooperazione sul clima. Il voto d
010
Reposted by Giacomo Grassi
climalteranti.bsky.social @climalteranti.bsky.social · 04/06/2026
Contrariamente a quanto sostengono i negazionisti climatici, negli ultimi 25 anni i rapporti dell’IPCC hanno aumentato la preoccupazione per i rischi climatici che potremo avere in futuro, non www.climalteranti.it/2026/06/03/il-…
climalteranti.it
Il futuro degli impatti climatici non è (ancora?) cambiato, purtroppo
Contrariamente a quanto sostengono i negazionisti climatici, negli ultimi 25 anni i rapporti dell’IPCC hanno aumentato la preoccupazione per i rischi climatic
012
Reposted by Giacomo Grassi
climalteranti.bsky.social @climalteranti.bsky.social · 21/05/2026
RCP8.5 è uno scenario estremo usato come stress test nei modelli climatici, ma nella comunicazione è stato spesso scambiato per una previsione del futuro che ci www.climalteranti.it/2026/05/21/com…
climalteranti.it
Come un telefono senza fili può distorcere il dibattito climatico: la storia dello scenario RCP 8.5
RCP8.5 è uno scenario estremo usato come stress test nei modelli climatici, ma nella comunicazione è stato spesso scambiato per una previsione del futuro che
012
Giacomo Grassi @giacgrassi.bsky.social · 21/05/2026
🌍 Sul clima e sull’energia il problema non è la mancanza di informazioni. È la mancanza di una percezione aggiornata della realtà. 📰 Ne abbiamo scritto su la Repubblica con Matteo Motterlini www.repubblica.it/commenti/202... #Clima #energia
021
Giacomo Grassi @giacgrassi.bsky.social · 23/04/2026
Il sovranismo energetico fa bene al clima ? E poi: ⚡Più energia vuol dire più emissioni? 🌍 Come siamo messi sul clima? •⁠ ⁠🇪🇺 Il Green Deal è una svolta o un boomerang? Di queste e altre domande ho discusso con Francesco Costa, nel suo podcast Wilson. www.ilpost.it/podcasts/wil... #clima
020
Giacomo Grassi @giacgrassi.bsky.social · 16/04/2026
Honored to have shared the podium yesterday at the Min. of Environment, Rome, with IPCC Chair Jim Skea. Jim presented IPCC’s ongoing work assessing climate science, while I outlined emerging methodologies for reporting Carbon Dioxide Removal activities in national inventories. @ipcc.bsky.social
120
Giacomo Grassi @giacgrassi.bsky.social · 16/04/2026
Honored to have shared the podium yesterday at Min. of Environment, Rome, with IPCC chair Jim Skea. Jim presented the IPCC’s ongoing work assessing climate science, while I outlined emerging methodologies for reporting Carbon Dioxide Removal activities in national inventories @ipcc.bsky.social
000
Reposted by Giacomo Grassi
David Ho @davidho.bsky.social · 15/04/2026
@giacgrassi.bsky.social is a Senior Scientific Officer at the European Commission’s Joint Research Centre (JRC). A leading expert on forests and climate, he specializes in LULUCF and greenhouse gas inventories. He is a prominent IPCC author and recipient of the 2020 Bologna Award for Sustainability.
A black and white, close-up portrait shows a man with short gray hair and dark eyes looking directly at the camera with a subtle, pleasant smile. He is wearing a light-colored blazer over a collared shirt and a dark necktie with a small, light-colored patterned design. The background is a blurred outdoor scene with leafy trees.
1558
Giacomo Grassi @giacgrassi.bsky.social · 16/03/2026
Come comunicare il clima e la transizione energetica? Ne abbiamo parlato con Daniele Scaglione nel suo Podcast "Non so Come Dirtelo" YouTube m.youtube.com/watch?si=0Sj... Spotify open.spotify.com/episode/5HTb... Apple Podcast lnkd.in/dBjhFjsJ #IPCC #cambiamentoclimatico
m.youtube.com
47. Tra scienza e politica - Giacomo Grassi
YouTube video by Spellmedia
011
Giacomo Grassi @giacgrassi.bsky.social · 26/02/2026
📣 Postdoc Position: Land Carbon Fluxes & GHG Inventories job-portal.lmu.de/jobposting/b... 🌍 Hosted by the Ludwig-Maximilians-Universität München, includes a up to 2 years at the Joint Research Centre (Italy), ➡️ Unique opportunity to work at the science–policy interface. #ClimateScience
job-portal.lmu.de
Postdoctoral researcher on Reconciliation of land fluxes between global models and national greenhouse gas inventories (m/f/x)
010
Giacomo Grassi @giacgrassi.bsky.social · 26/02/2026
🌍 Where to access the data 🔗 EU Forest Observatory: forest-observatory.ec.europa.eu/carbon/fluxes 🔗 Online repository: zenodo.org/records/1790... Huge thanks to Joana Melo for leading this work!
forest-observatory.ec.europa.eu
EU Forest Observatory
Web site created using create-react-app
010
Giacomo Grassi @giacgrassi.bsky.social · 26/02/2026
🌳 The Hub centers on national GHG inventories and compares them with global datasets (e.g., Global Carbon Budget, Global Forest Watch), applying a “translation” approach to align definitions across communities. It support efforts under the IPCC to increase confidence on land use emissions. 2/
110
Giacomo Grassi @giacgrassi.bsky.social · 26/02/2026
🌳 Puzzled by land-use emissions data? ➡️ The LULUCF Data Hub description paper now in discussion: essd.copernicus.org/preprints/es... 🌍 The Hub is an open-access platform that compiles, harmonizes, and visualizes country-level CO₂ fluxes from land use, land-use change and forestry (LULUCF). 1/
essd.copernicus.org
The LULUCF Data Hub: translating global land use emissions estimates into the national GHG inventory framework
Abstract. Global estimates of anthropogenic land use CO2 fluxes from bookkeeping models and dynamic global vegetation models, as well as those derived from Earth observations (EO), can differ widely f...
143
Giacomo Grassi @giacgrassi.bsky.social · 16/01/2026
Chi è Lysenko, e cosa c’entra con Trump, l’IPCC e la democrazia? Ne abbiamo scritto nel Il Sole 24 Ore con il filosofo della scienza Matteo Motterlini. Uscire dall'IPCC non significa sottrarsi al riscaldamento globale, così come gettare il termometro non fa sparire la febbre.
010
Reposted by Giacomo Grassi
climalteranti.bsky.social @climalteranti.bsky.social · 08/01/2026
www.climalteranti.it/2026/01/05/p... @giacgrassi.bsky.social
climalteranti.it
Perché la nostra mente è l’ostacolo più grande nella lotta al cambiamento climatico
Il cambiamento climatico non è solo una crisi ambientale. È, prima di tutto, una crisi cognitiva. È da questa tesi, tanto semplice quanto scomoda, che prende
021
Giacomo Grassi @giacgrassi.bsky.social · 03/01/2026
All’inizio del nuovo anno, può essere utile chiedersi a che punto siamo nella crisi climatica. È una sfida che ci chiede di scegliere insieme la rotta giusta, prima che la fisica decida per noi. Ne abbiamo scritto ne Il Post con il filosofo Matteo Motterlini www.ilpost.it/2026/01/03/g...
ilpost.it
Anno nuovo, clima vecchio - Il Post
Bilancio della rotta del cambiamento climatico dieci anni dopo l’Accordo di Parigi e un mese dopo la COP30
010
Giacomo Grassi @giacgrassi.bsky.social · 08/12/2025
Proud to be European ❤️❤️
020
Giacomo Grassi @giacgrassi.bsky.social · 23/11/2025
4/ The captain doesn’t know the iceberg’s depth or how the hull would react. Similarly, temperature projections are uncertain. But uncertainty isn’t ignorance and shouldn’t excuse inaction. It should drive us to act on what we can control: the ship’s turning radius—our greenhouse gas emissions.
0245
Giacomo Grassi @giacgrassi.bsky.social · 23/11/2025
3/ The ship hasn’t completed its turn (orange: emissions still rising), but change has begun. Compared to ten years ago, the worst risks (red) are less likely. Recent pledges lower risk further (yellow), yet we remain in dangerous waters. To reach safer zones, the turn must accelerate (green).
1172
Giacomo Grassi @giacgrassi.bsky.social · 23/11/2025
2/ Imagine a transatlantic liner at full speed: that’s the global economy. Emissions set its course. Scientists spot a huge iceberg and raise the alarm. After long discussions, just like at climate conferences, the danger is acknowledged and the collective decision is made to steer the ship ...
1173
Giacomo Grassi @giacgrassi.bsky.social · 23/11/2025
With a mixed-results at COP30 - i.e. good intentions but no concrete plans for the “transition away from fossil fuels” - don’t give up. Let’s remember the progress made since the Paris Agreement and the options ahead of us. That’s the message of the image below
29041
Reposted by Giacomo Grassi
IPCC @ipcc.bsky.social · 19/11/2025
📣 PRESS RELEASE #IPCC is calling for the nominations of authors for the Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture Utilization and Storage Read the PR 👉 www.ipcc.ch/2025/11/19/c... Submissions close 12 December 2025 🧵 1/3
194
Reposted by Giacomo Grassi
IPCC @ipcc.bsky.social · 31/10/2025
#IPCC agrees on the scientific content of the remaining methodology report in the seventh assessment cycle and 2026 workplan for the three key climate reports in Lima, 🇵🇪 Peru. 🔗 www.ipcc.ch/2025/10/31/p... 📸 ENB - IISD - Anastasia Rodopoulou
1165
Giacomo Grassi @giacgrassi.bsky.social · 13/10/2025
Che la causa del cambiamento climatico siamo noi è in realtà una buona notizia. Spiego il perché nella parte finale (min 17:30) di questa bella puntata di Presa Diretta. www.raiplay.it/video/2025/1...
raiplay.it
PresaDiretta 2025/26 - Missione Terra, quel che resta dei ghiacci - 12/10/2025 - Video - RaiPlay
Biomass, il satellite che studia la materia vivente presente nelle foreste. Cryosat, il satellite che da 15 anni monitora la fusione dei ghiacciai: grazie ai suoi dati, il progetto Glambie che riunisc...
020
Reposted by Giacomo Grassi
Oca sapiens @ocasapiens.bsky.social · 06/08/2025
#USpolitics #AGWdeniers @giacgrassi.bsky.social‬ e @caserinik.bsky.social fanno a polpette il rapporto dei 5 negaioli per il DOE. Sono stati più veloci del solito, ma gli argomenti di quei "mercanti di dubbi... sono già stati più volte confutati anche su Climalteranti."
climalteranti.it
Quando la scienza si piega alla politica: il negazionismo climatico nel rapporto del Dipartimento dell’Energia USA
Il 23 luglio 2025, il Dipartimento dell’Energia (DOE) degli Stati Uniti ha pubblicato un documento intitolato A Critical Review of Impacts of Greenhouse Gas E
022
Giacomo Grassi @giacgrassi.bsky.social · 04/08/2025
thanks to the great team of co-authors, including Michel den Elzen, Zuelclady M.F. Araujo Gutierrez, Will Lamb, Nicklas Forsell, Joana B. Melo, Simone Rossi, Malte Meinshausen, Sandro Federici, Matthew GIDDEN, Kimon Keramidas, Anu Korosuo
210
Giacomo Grassi @giacgrassi.bsky.social · 04/08/2025
🤔 However, land use remains a blind spot in tracking progress under the #ParisAgreement, mainly due to inconsistencies between global models and country-reported data. 💡 It is crucial that future #GlobalStocktakes include comparisons between modeled and country-provided net land-use emissions. 2/
130
Giacomo Grassi @giacgrassi.bsky.social · 04/08/2025
What is the contribution of land use to countries' climate pledges? 🖋️ A new paper led by Rosa Roman-Cuesta explores this question and offers a way forward. 🌲 The study finds that land use makes up a quarter of global 2030 mitigation pledges — mostly reliant on external support. rdcu.be/eydhU 1/
rdcu.be
Land remains a blind spot in tracking progress under the Paris Agreement due to lack of data comparability
Communications Earth & Environment - Discrepancies exist between data used in countries’ greenhouse gas inventories and modelled benchmarks for the Paris agreement, according to an...
2104
Giacomo Grassi @giacgrassi.bsky.social · 01/08/2025
read-only text here rdcu.be/eyycF
rdcu.be
Securing the forest carbon sink for the European Union’s climate ambition
Nature - Actionable research recommendations are outlined to improve the monitoring and modelling of forest resources and their carbon sink, and to better inform forest management decisions and the...
010
Giacomo Grassi @giacgrassi.bsky.social · 01/08/2025
rdcu.be/eyycF
rdcu.be
Securing the forest carbon sink for the European Union’s climate ambition
Nature - Actionable research recommendations are outlined to improve the monitoring and modelling of forest resources and their carbon sink, and to better inform forest management decisions and the...
100
Giacomo Grassi @giacgrassi.bsky.social · 01/08/2025
rdcu.be/eyycF
rdcu.be
Securing the forest carbon sink for the European Union’s climate ambition
Nature - Actionable research recommendations are outlined to improve the monitoring and modelling of forest resources and their carbon sink, and to better inform forest management decisions and the...
010
Giacomo Grassi @giacgrassi.bsky.social · 01/08/2025
which is your email?
200
Giacomo Grassi @giacgrassi.bsky.social · 31/07/2025
Why is the European forest carbon sink declining? How science can help reversing this trend? A perspective paper in Nature discusses these questions, highlighting the importance to better monitor forest resources and their resilience. www.nature.com/articles/s41...
nature.com
Securing the forest carbon sink for the European Union’s climate ambition - Nature
Actionable research recommendations are outlined to improve the monitoring and modelling of forest resources and their carbon sink, and to better inform forest management decisions and the European Gr...
4209
Giacomo Grassi @giacgrassi.bsky.social · 15/05/2025
Full-text view-only HERE: rdcu.be/el87m
rdcu.be
Improving land-use emission estimates under the Paris Agreement
Nature Sustainability - Climate science and national emissions reporting communities have historically used different definitions and methods for anthropogenic land-based carbon removals. As the...
011
Giacomo Grassi @giacgrassi.bsky.social · 15/05/2025
Full-text view-only: rdcu.be/el87m
rdcu.be
Improving land-use emission estimates under the Paris Agreement
Nature Sustainability - Climate science and national emissions reporting communities have historically used different definitions and methods for anthropogenic land-based carbon removals. As the...
020
Giacomo Grassi @giacgrassi.bsky.social · 15/05/2025
Thanks to the stellar co-authors, including @glenpeters.bsky.social , @pepcanadell.bsky.social , @gidden.bsky.social and others, and to all participants of the IPCC Expert Meeting. 7/7
020
Giacomo Grassi @giacgrassi.bsky.social · 15/05/2025
This is relevant for forest-rich nations, where “natural” sinks often play a major role in net-zero pledges. Policymakers need to grasp these implications and adjust their climate ambition accordingly 6/7
110
Giacomo Grassi @giacgrassi.bsky.social · 15/05/2025
We also urge the scientific community to generate these inventory-aligned estimates and scenarios, and to explore the implications. Key takeaways: under inventory definitions, the remaining carbon budget is smaller—and reaching net-zero CO₂ alone is not enough to stop warming. 5/7
110
Giacomo Grassi @giacgrassi.bsky.social · 15/05/2025
Drawing on prior studies and IPCC Expert Meetings, the IPCC has recently decided that its 7th Assessment Report will present land-use CO₂ estimates and scenarios that align with national inventory definitions. Our Comment explains why this is a crucial step forward. 4/7
110
Giacomo Grassi @giacgrassi.bsky.social · 15/05/2025
These differing definitions are like two languages: each valid in its own context, but hard to compare without proper translation. Reconciling them is key for aligning global models, national inventories, and Earth observation — ultimately building trust in land-use emission estimates. 3/7
110
Giacomo Grassi @giacgrassi.bsky.social · 15/05/2025
Climate science and national reporting use different definitions for anthropogenic land-use CO₂ fluxes. This disconnect has led to a 7 billion-tonne annual gap in CO₂ estimates from land use—equivalent to 20% of global fossil CO₂ emissions—causing confusion among scientists and policymakers 2/7
110
Giacomo Grassi @giacgrassi.bsky.social · 15/05/2025
📣 New Comment on Improving land-use emission estimates under the Paris Agreement in Nature Sustainability www.nature.com/articles/s41... Land carbon removals are key on the path to net-zero. Yet, confusion exists on what “anthropogenic” land-use C fluxes are. #LULUCF #IPCC #ParisAgreement 1/7
nature.com
Improving land-use emission estimates under the Paris Agreement - Nature Sustainability
Climate science and national emissions reporting communities have historically used different definitions and methods for anthropogenic land-based carbon removals. As the mitigation agenda accelerates...
2109
Giacomo Grassi @giacgrassi.bsky.social · 15/05/2025
On 6–7 May 2025, a JRC-EEA workshop on Land Use Land-Use Change and Forestry (LULUCF) gathered in Ispra (IT) over 50 GHG inventory experts, scientists and policymakers. We discussed challenges in GHG reporting and the decline of forest carbon sinks in Europe. Agenda/presentations: lnkd.in/dkJNxSWE
021
Giacomo Grassi @giacgrassi.bsky.social · 27/03/2025
🧐 Confused about different estimates of land-use CO2 emissions? 🌲A new paper led by David Gibbs enhances comparability between satellite-based forest carbon flux maps and National greenhouse gas inventories. ➡️ Paper: lnkd.in/dU5-bv4P ➡️ Story: bit.ly/43qX2Mv ➡️ Country-level data: bit.ly/3XvBSJf
essd.copernicus.org
Revised and updated geospatial monitoring of 21st century forest carbon fluxes
Abstract. Earth observation data are increasingly used to estimate the magnitude and geographic distribution of greenhouse gas (GHG) fluxes and reduce overall uncertainty in the global carbon budget, ...
0209
Giacomo Grassi @giacgrassi.bsky.social · 21/02/2025
This is outrageous. Stupidity at work. It’s a sign of ideological hostility to everything that involves a multilateral dialogue and cooperation. If you ignore climate change, climate change will not ignore you.
041
Giacomo Grassi @giacgrassi.bsky.social · 15/02/2025
And for those wanting a deep dive into the complex issue of different definitions of anthropogenic vs natural carbon fluxes, here is the final report and presentations made at the #IPCC expert meeting on reconciling land use emissions, held last July www.ipcc-nggip.iges.or.jp/public/mtdoc...
ipcc-nggip.iges.or.jp
Publications - IPCC-TFI
030
Giacomo Grassi @giacgrassi.bsky.social · 04/02/2025
while in Germany ...https://www.thuenen.de/en/themenfelder/klima-und-luft/emissionsinventare-buchhaltung-fuer-den-klimaschutz/treibhausgas-emissionen-lulucf
100
Giacomo Grassi @giacgrassi.bsky.social · 13/01/2025
2024: l'anno più caldo di sempre a #Radio3Scienza. Dopo l'ottima spiegazione di Elisa Palazzi, discuto cosa significhi “net-zero”, e perché stimare gli assorbimenti di CO2 da parte delle foreste è particolarmente complicato. www.raiplaysound.it/audio/2025/0...
raiplaysound.it
Radio3 Scienza | S2025 | 2024: l'anno più caldo di sempre | Rai Radio 3 | RaiPlay Sound
2024: l'anno più caldo di sempre - Radio3 Scienza - Venerdì scorso il servizio Copernicus, il programma coordinato e gestito dalla Commissione europea per il monitoraggio del nostro pianeta, ha certif...
001
Giacomo Grassi @giacgrassi.bsky.social · 16/12/2024
Honored to have contributed to the IPCC AR7 scoping meeting last week
031