Giacomo Grassi
@giacgrassi.bsky.social
Scientist @EU_Commission's Joint Research Centre. Forests, carbon and climate in the science/policy interface. Member #IPCC task force Bureau #AR7. Views mine.
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
Let’s remember the progress made since the Paris Agreement and the options ahead of us. That’s the message of the image below
November 23, 2025 at 5:58 PM
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
Let’s remember the progress made since the Paris Agreement and the options ahead of us. That’s the message of the image below
Reposted by Giacomo Grassi
📣 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
#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
November 19, 2025 at 4:22 PM
📣 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
#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
Reposted by Giacomo Grassi
#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
🔗 www.ipcc.ch/2025/10/31/p...
📸 ENB - IISD - Anastasia Rodopoulou
October 31, 2025 at 3:33 PM
#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
🔗 www.ipcc.ch/2025/10/31/p...
📸 ENB - IISD - Anastasia Rodopoulou
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...
Spiego il perché nella parte finale (min 17:30) di questa bella puntata di Presa Diretta.
www.raiplay.it/video/2025/1...
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...
www.raiplay.it
October 13, 2025 at 6:04 PM
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...
Spiego il perché nella parte finale (min 17:30) di questa bella puntata di Presa Diretta.
www.raiplay.it/video/2025/1...
Reposted by Giacomo Grassi
#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."
#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."
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
www.climalteranti.it
August 6, 2025 at 12:17 PM
#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."
#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."
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/
🖋️ 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/
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...
rdcu.be
August 4, 2025 at 10:01 AM
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/
🖋️ 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/
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...
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...
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...
www.nature.com
July 31, 2025 at 8:46 PM
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...
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...
📣 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
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
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...
www.nature.com
May 15, 2025 at 10:09 AM
📣 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
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
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
We discussed challenges in GHG reporting and the decline of forest carbon sinks in Europe.
Agenda/presentations: lnkd.in/dkJNxSWE
May 15, 2025 at 6:19 AM
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
We discussed challenges in GHG reporting and the decline of forest carbon sinks in Europe.
Agenda/presentations: lnkd.in/dkJNxSWE
🧐 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
🌲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
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, ...
essd.copernicus.org
March 27, 2025 at 9:31 AM
🧐 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
🌲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
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.
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.
‼️The US-based @ipcc.bsky.social technical support unit (TSU) for Working Group 3 Co-Chairs has been terminated, and the US won’t be attending next week’s IPCC meeting where the AR7 chapter outlines will be approved.
More by @afreedma.bsky.social here:
More by @afreedma.bsky.social here:
Scoop: U.S. delegation pulled from key U.N. climate science meeting
The IPCC meeting in China is slated to determine the content in the group's next series of reports.
www.axios.com
February 21, 2025 at 9:06 AM
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.
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.
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...
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...
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...
www.raiplaysound.it
January 13, 2025 at 5:21 PM
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...
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...
Honored to have contributed to the IPCC AR7 scoping meeting last week
The @ipcc.bsky.social #AR7 scoping meeting successfully took place in Kuala Lumpur last week, with more than 230 experts from 70 countries drafting the outlines of the three Working Group contributions to #IPCC's seventh report assessing policy-relevant science on #climatechange.
December 16, 2024 at 8:39 PM
Honored to have contributed to the IPCC AR7 scoping meeting last week
Is land use a source or a sink of CO2 globally? Well, it depends who you ask.
A dialogue has started to reconcile different estimates. Two recent analyses offer complementary views:
-IPCC Expert Meeting www.ipcc-nggip.iges.or.jp/public/mtdoc...
-Allen et al. 2024 www.nature.com/articles/s41...
A dialogue has started to reconcile different estimates. Two recent analyses offer complementary views:
-IPCC Expert Meeting www.ipcc-nggip.iges.or.jp/public/mtdoc...
-Allen et al. 2024 www.nature.com/articles/s41...
https://www.ipcc-nggip.iges.or.jp/public/mtdocs/2407_EM_Land.html…
November 19, 2024 at 9:56 PM
Is land use a source or a sink of CO2 globally? Well, it depends who you ask.
A dialogue has started to reconcile different estimates. Two recent analyses offer complementary views:
-IPCC Expert Meeting www.ipcc-nggip.iges.or.jp/public/mtdoc...
-Allen et al. 2024 www.nature.com/articles/s41...
A dialogue has started to reconcile different estimates. Two recent analyses offer complementary views:
-IPCC Expert Meeting www.ipcc-nggip.iges.or.jp/public/mtdoc...
-Allen et al. 2024 www.nature.com/articles/s41...
January 20, 2025 at 9:58 PM
The first 'State of Carbon Dioxide Removal' is outIt was a pleasure to work with Will Lamb, Thomas Gasser, Matthew Gidden and other great scientists on Chapter 8: The CDR gap
#carbonremoval #negativeemissions
stateofcdr.org
#carbonremoval #negativeemissions
stateofcdr.org
January 20, 2025 at 9:58 PM
The first 'State of Carbon Dioxide Removal' is outIt was a pleasure to work with Will Lamb, Thomas Gasser, Matthew Gidden and other great scientists on Chapter 8: The CDR gap
#carbonremoval #negativeemissions
stateofcdr.org
#carbonremoval #negativeemissions
stateofcdr.org
Ieri ho partecipato su Radio Radicale a un dibattito con un professore che nega il contributo umano ai cambiamenti climatici.
Quando nella scienza un uomo con un’opinione incontra un uomo con un fatto, l’uomo con l’opinione è un uomo morto.
1/
radioradicale.it/scheda/686869/…
Quando nella scienza un uomo con un’opinione incontra un uomo con un fatto, l’uomo con l’opinione è un uomo morto.
1/
radioradicale.it/scheda/686869/…
Overshoot - Confronto sulle cause del cambiamento climatico con Alberto Prestininzi e Giacomo Grassi
Rubrica. Ascolta l'audio registrato domenica 1 gennaio 2023 in radio. Overshoot - Confronto sulle cause del cambiamento climatico con Alberto Prestininzi ...
www.radioradicale.it
January 20, 2025 at 9:58 PM
Ieri ho partecipato su Radio Radicale a un dibattito con un professore che nega il contributo umano ai cambiamenti climatici.
Quando nella scienza un uomo con un’opinione incontra un uomo con un fatto, l’uomo con l’opinione è un uomo morto.
1/
radioradicale.it/scheda/686869/…
Quando nella scienza un uomo con un’opinione incontra un uomo con un fatto, l’uomo con l’opinione è un uomo morto.
1/
radioradicale.it/scheda/686869/…
Thanks for the feedback on the tweet on where we stand in the climate crisis
Some saw excessive optimism. Don't forget: the figure is an analogy, for illustrative purposes.
Others asked to reuse and edit. Here it is (slightly re-edited after comments
drive.google.com/drive/folders/…
Some saw excessive optimism. Don't forget: the figure is an analogy, for illustrative purposes.
Others asked to reuse and edit. Here it is (slightly re-edited after comments
drive.google.com/drive/folders/…
January 20, 2025 at 9:57 PM
Thanks for the feedback on the tweet on where we stand in the climate crisis
Some saw excessive optimism. Don't forget: the figure is an analogy, for illustrative purposes.
Others asked to reuse and edit. Here it is (slightly re-edited after comments
drive.google.com/drive/folders/…
Some saw excessive optimism. Don't forget: the figure is an analogy, for illustrative purposes.
Others asked to reuse and edit. Here it is (slightly re-edited after comments
drive.google.com/drive/folders/…
Communicating the climate crisis to non-experts is difficult. Here I tried to illustrate in a simple way where we stand and where we are heading.
January 20, 2025 at 9:57 PM
Communicating the climate crisis to non-experts is difficult. Here I tried to illustrate in a simple way where we stand and where we are heading.
It does not happen so often to sit in a panel with four Ministers (PNG, Honduras, Gabon, Belize) and the UNFCCC SBSTA chair, speaking about science, forest carbon and REDD+.
But the best was a this rap up performance 😆Thanks to @CfRN_org for organizing
linkedin.com/posts/bababrin…
But the best was a this rap up performance 😆Thanks to @CfRN_org for organizing
linkedin.com/posts/bababrin…
Baba Brinkman on LinkedIn: #cop27 #carboncredits #biodiversity #climatechange #conservation… | 11 comments
Here's my rap up performance from earlier today, at a UNFCCC side event featuring the environment ministers of Honduras, Gabon, and Belize, and the chief… | 11 comments on LinkedIn
www.linkedin.com
January 20, 2025 at 9:57 PM
It does not happen so often to sit in a panel with four Ministers (PNG, Honduras, Gabon, Belize) and the UNFCCC SBSTA chair, speaking about science, forest carbon and REDD+.
But the best was a this rap up performance 😆Thanks to @CfRN_org for organizing
linkedin.com/posts/bababrin…
But the best was a this rap up performance 😆Thanks to @CfRN_org for organizing
linkedin.com/posts/bababrin…
Happy to have contributed to the Global Carbon Budget 2022 with 100+ other authors.
Great Summaries here:
--
carbonbrief.org/analysis-globa… x.com/peters_glen/st…
Great Summaries here:
--
carbonbrief.org/analysis-globa… x.com/peters_glen/st…
Analysis: Global CO2 emissions from fossil fuels hit record high in 2022 - Carbon Brief
Global carbon dioxide emissions from fossil fuels and cement have increased by 1.0% in 2022,...
www.carbonbrief.org
January 20, 2025 at 9:57 PM
Happy to have contributed to the Global Carbon Budget 2022 with 100+ other authors.
Great Summaries here:
--
carbonbrief.org/analysis-globa… x.com/peters_glen/st…
Great Summaries here:
--
carbonbrief.org/analysis-globa… x.com/peters_glen/st…
Puzzled by the huge (6 GtCO2/y) mismatch in global land-use CO2 flux between models and national inventories?
Join/follow online this IPCC side event at COP27, Sat 12 Nov 2pm (Egypt) or 1pm (CET)
Estimating GHG Emissions - Reconciling Different Approaches
apps.ipcc.ch/outreach/progr…
Join/follow online this IPCC side event at COP27, Sat 12 Nov 2pm (Egypt) or 1pm (CET)
Estimating GHG Emissions - Reconciling Different Approaches
apps.ipcc.ch/outreach/progr…
Outreach - Programme
This session aims to compare the different types of GHG emissions measurement approaches available, with a focus on land,[LM1] and how they're reconciled in the WG III report for the purposes of Integrated Assessment Modelling. It will provide a deep dive into various approaches, highlighting their differences, and how they've been used for the WG III report.
apps.ipcc.ch
January 20, 2025 at 9:57 PM
Puzzled by the huge (6 GtCO2/y) mismatch in global land-use CO2 flux between models and national inventories?
Join/follow online this IPCC side event at COP27, Sat 12 Nov 2pm (Egypt) or 1pm (CET)
Estimating GHG Emissions - Reconciling Different Approaches
apps.ipcc.ch/outreach/progr…
Join/follow online this IPCC side event at COP27, Sat 12 Nov 2pm (Egypt) or 1pm (CET)
Estimating GHG Emissions - Reconciling Different Approaches
apps.ipcc.ch/outreach/progr…
A fine ottobre è stato presentato l’Emissions gap report dell’UNEP, Programma Ambientale delle Nazioni Unite.
Quali sono i principali risultati? A che punto siamo in Europa e in Italia?
Ecco una sintesi in italiano @Climalteranti @marinavitullo1
climalteranti.it/2022/11/09/una…
Quali sono i principali risultati? A che punto siamo in Europa e in Italia?
Ecco una sintesi in italiano @Climalteranti @marinavitullo1
climalteranti.it/2022/11/09/una…
Una finestra che si sta chiudendo
A fine ottobre è stato presentato l’Emissions gap report dell’UNEP, il Programma Ambientale delle Nazioni Unite. Quali sono i principali elementi di questo
www.climalteranti.it
January 20, 2025 at 9:57 PM
A fine ottobre è stato presentato l’Emissions gap report dell’UNEP, Programma Ambientale delle Nazioni Unite.
Quali sono i principali risultati? A che punto siamo in Europa e in Italia?
Ecco una sintesi in italiano @Climalteranti @marinavitullo1
climalteranti.it/2022/11/09/una…
Quali sono i principali risultati? A che punto siamo in Europa e in Italia?
Ecco una sintesi in italiano @Climalteranti @marinavitullo1
climalteranti.it/2022/11/09/una…
I love the cover of the UNEP emissions gap report.
It tells everything about the current climate crisis, the short time we have, and the extent of the challenge.
Happy to have worked on chapter 2 (Global emissions trends) with @lamb_wf and others
unep.org/resources/emis…
It tells everything about the current climate crisis, the short time we have, and the extent of the challenge.
Happy to have worked on chapter 2 (Global emissions trends) with @lamb_wf and others
unep.org/resources/emis…
January 20, 2025 at 9:57 PM
I love the cover of the UNEP emissions gap report.
It tells everything about the current climate crisis, the short time we have, and the extent of the challenge.
Happy to have worked on chapter 2 (Global emissions trends) with @lamb_wf and others
unep.org/resources/emis…
It tells everything about the current climate crisis, the short time we have, and the extent of the challenge.
Happy to have worked on chapter 2 (Global emissions trends) with @lamb_wf and others
unep.org/resources/emis…