Andy Reisinger
@andyreisinger.bsky.social
Climate science and policy. Also the occasional photo and random thoughts. Currently serving as Commissioner at He Pou A Rangi, New Zealand Climate Change Commission; former IPCC vice-chair WGIII. Usual disclaimers...
Thanks, up look out for the podcast! If it's of interest, I recently gave a longer overview lecture on overshot for the Euro-Mediterranean Centre on Climate Change. youtu.be/TzkoJaLQ8ik
Lecture starts at 8.15 in that recording.
Lecture starts at 8.15 in that recording.
October 3, 2025 at 6:30 AM
Thanks, up look out for the podcast! If it's of interest, I recently gave a longer overview lecture on overshot for the Euro-Mediterranean Centre on Climate Change. youtu.be/TzkoJaLQ8ik
Lecture starts at 8.15 in that recording.
Lecture starts at 8.15 in that recording.
We'll cross global warming of 1.5°C in the next 5 years or so - what then?
I'll explore the challenges and choices we're facing with climate overshoot in a lecture on 18 September for the Centro Euro-Mediterranneo sui Cambiamenti Climatici
www.cmcc.it/lectures_con...
I'll explore the challenges and choices we're facing with climate overshoot in a lecture on 18 September for the Centro Euro-Mediterranneo sui Cambiamenti Climatici
www.cmcc.it/lectures_con...
September 10, 2025 at 8:27 AM
We'll cross global warming of 1.5°C in the next 5 years or so - what then?
I'll explore the challenges and choices we're facing with climate overshoot in a lecture on 18 September for the Centro Euro-Mediterranneo sui Cambiamenti Climatici
www.cmcc.it/lectures_con...
I'll explore the challenges and choices we're facing with climate overshoot in a lecture on 18 September for the Centro Euro-Mediterranneo sui Cambiamenti Climatici
www.cmcc.it/lectures_con...
With a stark graphic: far from alleviating global hunger, animal-sourced food products produced by high and upper-middle income countries predominantly go to other wealthy countries, with less than 6% of total animal food production by those countries reaching low and lower-middle income countries.
August 12, 2025 at 10:08 AM
With a stark graphic: far from alleviating global hunger, animal-sourced food products produced by high and upper-middle income countries predominantly go to other wealthy countries, with less than 6% of total animal food production by those countries reaching low and lower-middle income countries.
National temperature neutrality, agricultural methane and climate policy: reinforcing inequality in the global food system
iopscience.iop.org/article/10.1...
👀⛈️ #nzpol (it's about Ireland though)
iopscience.iop.org/article/10.1...
👀⛈️ #nzpol (it's about Ireland though)
August 12, 2025 at 10:02 AM
National temperature neutrality, agricultural methane and climate policy: reinforcing inequality in the global food system
iopscience.iop.org/article/10.1...
👀⛈️ #nzpol (it's about Ireland though)
iopscience.iop.org/article/10.1...
👀⛈️ #nzpol (it's about Ireland though)
We discuss achieve three illustrative overshoot pathways that could achieve an eventual decline in global temperature. These are further gross CO2 reductions, further CDR, or further methane reductions. They play complementary roles. But limiting how much we exceed 1.5°C is critical for feasibility.
April 14, 2025 at 8:53 PM
We discuss achieve three illustrative overshoot pathways that could achieve an eventual decline in global temperature. These are further gross CO2 reductions, further CDR, or further methane reductions. They play complementary roles. But limiting how much we exceed 1.5°C is critical for feasibility.
We discuss geophysical feasibility of overshoot (i.e. exceed AND decline) - can we reverse global warming, and what other aspects of the Earth system might revert back if global temperature declines again - and which ones may or will not?
April 14, 2025 at 8:46 PM
We discuss geophysical feasibility of overshoot (i.e. exceed AND decline) - can we reverse global warming, and what other aspects of the Earth system might revert back if global temperature declines again - and which ones may or will not?
We set out a conceptual framework to understand risks in an overshoot world (a world that exceeds 1.5°C and then returns to it), and how those risks differ from one that had never exceeded 1.5°C, and one that remains above 1.5°C forever. TLDR: an overshoot world is a significantly more damaged world
April 14, 2025 at 8:42 PM
We set out a conceptual framework to understand risks in an overshoot world (a world that exceeds 1.5°C and then returns to it), and how those risks differ from one that had never exceeded 1.5°C, and one that remains above 1.5°C forever. TLDR: an overshoot world is a significantly more damaged world
We clarify what "overshoot" means in the scientific literature, and how this differs from common English - a source of endless miscommunication. We also look at whether and how overshoot fits with the provisions of the Paris Agreement.
April 14, 2025 at 8:36 PM
We clarify what "overshoot" means in the scientific literature, and how this differs from common English - a source of endless miscommunication. We also look at whether and how overshoot fits with the provisions of the Paris Agreement.
Overshoot: A Conceptual Review of Exceeding and Returning to Global Warming of 1.5°C. Once we exceed 1.5°C, is it all lost? Can we get back to it from above? What risks would that avoid, and which ones not?
Great collaboration with a range of IPCC authors!
www.annualreviews.org/content/jour...
Great collaboration with a range of IPCC authors!
www.annualreviews.org/content/jour...
April 14, 2025 at 8:33 PM
Overshoot: A Conceptual Review of Exceeding and Returning to Global Warming of 1.5°C. Once we exceed 1.5°C, is it all lost? Can we get back to it from above? What risks would that avoid, and which ones not?
Great collaboration with a range of IPCC authors!
www.annualreviews.org/content/jour...
Great collaboration with a range of IPCC authors!
www.annualreviews.org/content/jour...
Understanding cultural losses and damages induced by climate change in the Pacific region: evidence from Fiji.
"79% of participants ranked cultural heritage losses as equally or more important than losses in sectors like agriculture and infrastructure."
www.tandfonline.com/doi/full/10....
"79% of participants ranked cultural heritage losses as equally or more important than losses in sectors like agriculture and infrastructure."
www.tandfonline.com/doi/full/10....
April 10, 2025 at 10:27 PM
Understanding cultural losses and damages induced by climate change in the Pacific region: evidence from Fiji.
"79% of participants ranked cultural heritage losses as equally or more important than losses in sectors like agriculture and infrastructure."
www.tandfonline.com/doi/full/10....
"79% of participants ranked cultural heritage losses as equally or more important than losses in sectors like agriculture and infrastructure."
www.tandfonline.com/doi/full/10....
The IPCC has table in its AR6 Synthesis Report of the global emission reductions by 2035 that would be consistent with limiting warming to 1.5°C (already with limited overshoot). Can a highly developed country reducing significantly less than the global average claim to be consistent with Paris?
January 30, 2025 at 11:00 PM
The IPCC has table in its AR6 Synthesis Report of the global emission reductions by 2035 that would be consistent with limiting warming to 1.5°C (already with limited overshoot). Can a highly developed country reducing significantly less than the global average claim to be consistent with Paris?
Come work at He Pou A Rangi, New Zealand's Climate Change Commission, as General Manager, Evidence and Advice. This leadership role will steer the Commission's multi-year work programme providing independent advice and monitoring of climate action.
centralagenciesjobs.cass.govt.nz/jobdetails/a...
centralagenciesjobs.cass.govt.nz/jobdetails/a...
December 24, 2024 at 2:21 AM
Come work at He Pou A Rangi, New Zealand's Climate Change Commission, as General Manager, Evidence and Advice. This leadership role will steer the Commission's multi-year work programme providing independent advice and monitoring of climate action.
centralagenciesjobs.cass.govt.nz/jobdetails/a...
centralagenciesjobs.cass.govt.nz/jobdetails/a...
Black Friday, climate friendly(er)
November 28, 2024 at 9:11 PM
Black Friday, climate friendly(er)
Keeping up an Aotearoa photography feed. This is at Syme hut, on the shoulder of Mt Taranaki, after a good nor'westerly storm. One thing that never ceases to amaze me is just how comfortable one can feel in the outdoors.
November 13, 2024 at 12:11 AM
Keeping up an Aotearoa photography feed. This is at Syme hut, on the shoulder of Mt Taranaki, after a good nor'westerly storm. One thing that never ceases to amaze me is just how comfortable one can feel in the outdoors.
Thanks @glenpeters.bsky.social: "it is time to admit that the world will cross 1.5°C".
It's another question whether we can and will bring warming back down again to 1.5°C and how credible that is. But regardless, crossing 1.5°C is not a time to give up.
journals.sagepub.com/doi/10.1177/...
It's another question whether we can and will bring warming back down again to 1.5°C and how credible that is. But regardless, crossing 1.5°C is not a time to give up.
journals.sagepub.com/doi/10.1177/...
November 12, 2024 at 11:29 PM
Thanks @glenpeters.bsky.social: "it is time to admit that the world will cross 1.5°C".
It's another question whether we can and will bring warming back down again to 1.5°C and how credible that is. But regardless, crossing 1.5°C is not a time to give up.
journals.sagepub.com/doi/10.1177/...
It's another question whether we can and will bring warming back down again to 1.5°C and how credible that is. But regardless, crossing 1.5°C is not a time to give up.
journals.sagepub.com/doi/10.1177/...
Some forests just leave me speechless, and I'm better for it. Mt Mathews, Remutaka range.
November 9, 2024 at 4:51 AM
Some forests just leave me speechless, and I'm better for it. Mt Mathews, Remutaka range.
Before the light dies, find a boulder and huddle up. It'll keep you warm and it is better than sitting by yourself at night.
View south from near the summit of Taranaki maunga.
View south from near the summit of Taranaki maunga.
November 8, 2024 at 7:16 AM
Before the light dies, find a boulder and huddle up. It'll keep you warm and it is better than sitting by yourself at night.
View south from near the summit of Taranaki maunga.
View south from near the summit of Taranaki maunga.
When dealing with grief, I normally try to lose myself in nature for a while. But I can't get into the hills right now, so I hope it's ok if do this vicariously, by posting some photos from Aotearoa. Will get back to climate change in due course.
This is close to Blue Lake, in Nelson Lakes NP.
This is close to Blue Lake, in Nelson Lakes NP.
November 8, 2024 at 4:15 AM
When dealing with grief, I normally try to lose myself in nature for a while. But I can't get into the hills right now, so I hope it's ok if do this vicariously, by posting some photos from Aotearoa. Will get back to climate change in due course.
This is close to Blue Lake, in Nelson Lakes NP.
This is close to Blue Lake, in Nelson Lakes NP.
Just in case it helps - some tranquility from the coast
November 8, 2024 at 12:29 AM
Just in case it helps - some tranquility from the coast
November 1, 2024 at 5:03 AM
If you see this, post a mountain picture!
November 1, 2024 at 4:46 AM
If you see this, post a mountain picture!
Yes our oceans are special. And all our data must be wrong too!
October 30, 2024 at 5:13 AM
Yes our oceans are special. And all our data must be wrong too!
Methane isotope measurements show that the recent rapid rise is "mainly driven by increased emissions from microbial sources such as wetlands, waste, and agriculture".
www.pnas.org/doi/10.1073/...
Reducing methane is a critical part of effective climate policy. www.frontiersin.org/journals/sci...
www.pnas.org/doi/10.1073/...
Reducing methane is a critical part of effective climate policy. www.frontiersin.org/journals/sci...
October 29, 2024 at 9:10 PM
Methane isotope measurements show that the recent rapid rise is "mainly driven by increased emissions from microbial sources such as wetlands, waste, and agriculture".
www.pnas.org/doi/10.1073/...
Reducing methane is a critical part of effective climate policy. www.frontiersin.org/journals/sci...
www.pnas.org/doi/10.1073/...
Reducing methane is a critical part of effective climate policy. www.frontiersin.org/journals/sci...