Damon Matthews
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damonmatthews.bsky.social
Damon Matthews
@damonmatthews.bsky.social
4.9K followers 750 following 230 posts
Climate scientist at Concordia in Montreal, co-creator of climateclock.net, Director of sustainabilitydigitalage.org and member of Canada's Net-Zero Advisory Body. Interested in carbon budgets, nature-based solutions, and many other things
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Reposted by Damon Matthews
“Hard to abate” is the climate wonk’s term for an industry with no immediate route to zero carbon emissions. But I think there’s “hard to abate” & “expensive to abate” & then there’s “it’s just a bit difficult & we can’t really be bothered to abate”. None of this is impossible. We need to *choose*.
Human-induced warming not measured in ppb
Reposted by Damon Matthews
Yes! What causes the resilience of equatorial Kiribati reefs in the face of repeated El Nino driven marine heat waves is the core question of our local research program journals.plos.org/plosone/arti...
Reposted by Damon Matthews
Our new paper updating key metrics in the IPCC is now out, and the news is grim:

⬆️ Human induced warming now at 1.36C
⬆️ Rate of warming now 0.27C / decade
⬆️ Sharp increase in Earth's energy imbalance
⬇️ Remaining 1.5C carbon budget only 130 GtCO2

essd.copernicus.org/...
Indicators of Global Climate Change 2024: annual update of key indicators of the state of the climate system and human influence
Abstract. In a rapidly changing climate, evidence-based decision-making benefits from up-to-date and timely information. Here we compile monitoring datasets (published at https://doi.org/10.5281/zenodo.15639576; Smith et al., 2025a) to produce updated estimates for key indicators of the state of the climate system: net emissions of greenhouse gases and short-lived climate forcers, greenhouse gas concentrations, radiative forcing, the Earth's energy imbalance, surface temperature changes, warming attributed to human activities, the remaining carbon budget, and estimates of global temperature extremes. This year, we additionally include indicators for sea-level rise and land precipitation change. We follow methods as closely as possible to those used in the IPCC Sixth Assessment Report (AR6) Working Group One report. The indicators show that human activities are increasing the Earth's energy imbalance and driving faster sea-level rise compared to the AR6 assessment. For the 2015–2024 decade average, observed warming relative to 1850–1900 was 1.24 [1.11 to 1.35] °C, of which 1.22 [1.0 to 1.5] °C was human-induced. The 2024-observed best estimate of global surface temperature (1.52 °C) is well above the best estimate of human-caused warming (1.36 °C). However, the 2024 observed warming can still be regarded as a typical year, considering the human-induced warming level and the state of internal variability associated with the phase of El Niño and Atlantic variability. Human-induced warming has been increasing at a rate that is unprecedented in the instrumental record, reaching 0.27 [0.2–0.4] °C per decade over 2015–2024. This high rate of warming is caused by a combination of greenhouse gas emissions being at an all-time high of 53.6±5.2 Gt CO2e yr−1 over the last decade (2014–2023), as well as reductions in the strength of aerosol cooling. Despite this, there is evidence that the rate of increase in CO2 emissions over the last decade has slowed compared to the 2000s, and depending on societal choices, a continued series of these annual updates over the critical 2020s decade could track decreases or increases in the rate of the climatic changes presented here.
essd.copernicus.org
Reposted by Damon Matthews
What are ethics to a machine? ⚖️⚡💿 Let’s dive into a new article by Louai Rahal on "The use of publicly available online texts in training AI: An ethical analysis of AI’s right to learn" from the Journal of Information, Communication and Ethics in Society. 🧵1/9 www.researchgate.net/publication/...
The use of publicly available online texts in training AI: an ethical analysis of AI’s right to learn
Download Citation | The use of publicly available online texts in training AI: an ethical analysis of AI’s right to learn | Purpose This paper aims to discuss the ethical permissibility of using publi...
www.researchgate.net
Reposted by Damon Matthews
1/8 Ever wonder how feral dogs impact wild primates? 🐶🐒
A new study explores how the Central Himalayan Langur (Semnopithecus schistaceus) (CHL) changes its behavior when navigating a “landscape of fear” shaped by both humans and predatory dogs. Let’s make a thread. 🧵
Reposted by Damon Matthews
(1/9) 🧵
The financial sector is finally waking up to the major threat of biodiversity loss. Understanding local impacts is key to making sustainable nature-positive decisions. This recent article explores how environmental DNA (eDNA) could be a game-changer.
🧬 #biodiversity
The transformative potential of eDNA-based biodiversity impact assessment
Biodiversity impact assessments aim to enable market actors, regulators, and political agents to effectively steer human activities in a more sustaina…
www.sciencedirect.com
Reposted by Damon Matthews
This was filmed at Monkey Bay, Thailand — a hotspot for tourists and crab-eating long-tailed macaques. It looks fun. But feeding wild animals might be doing more harm than good... 🧵👇 1/10

#wildlifetourism #macaques #MonkeyBay #ProvisionFeeding #animalwelfare #primateconservation
Reposted by Damon Matthews
1/8 So I watched Wim Werner's Perfect Days and soon after started drinking Japanese canned coffee like the main character. Once the novelty wore off and my cooler head prevailed, I went down a rabbit hole of seeing whether canned was the more sustainable option for my coffee. Here's a 🧵about it ↩
Reposted by Damon Matthews
Agriculture contributes greatly to biodiversity loss, water depletion, and GHG emissions, but to date global assessments of agricultural impacts on the environment are hindered by a lack of globally standardized spatially explicit data. Here’s how Jwaideh & Dalin (2025) tackle this challenge. 1/9
Reposted by Damon Matthews
1/8 What assumptions and ideologies are represented in projected environmental futures?

In a paper published last October, a team of researchers from the University of Valladolid analyzed the ideological assumptions of 993 global environmental scenarios contained in 243 academic works.
Reposted by Damon Matthews
For an in-depth scope? Check out the 2022-2023 study: “The World of Coffee: 21st Century solutions for a commodity facing climate change risks” (Negre et al.) And for a smoother brew on 2025 coffee trends: perfectdailygrind.com/2025/02/what... @damonmatthews.bsky.social
What can we expect from specialty coffee in 2025?
Once defined by its passion, specialty coffee has become more pragmatic – and emerging trends push it further in this direction.
perfectdailygrind.com
Reposted by Damon Matthews
Since COVID-19, many of us shifted how and where we work—home, cafés, hybrid setups. But what about working outdoors? A recent study found indoor work norms still dominate, yet shows outdoor work can boost focus, mood, and productivity. 🌿💻 @damonmatthews.bsky.social
Reposted by Damon Matthews
Are protected areas even useful? 🤔 Let’s deep dive into the literature and experts’ opinions on the topic
🧵 (spoiler alert: it’s complicated…)

@damonmatthews.bsky.social #protectedareas #COP15 #natureconservation
(all references in the last post) 1/10
Article link: www.iisd.org/articles/ins...
Reposted by Damon Matthews
This is an interesting article by PhD student Anna Clara Arboitte de Assumpção from the Federal University of Rio Grande do Sul. It explores the growing field of conservation paleobiology and emphasizes the importance of this research in South America.

www.scielo.br/j/aabc/a/F4t...
Exploring the past to protect the future: an analysis of conservation paleobiology in South America
Abstract Conservation paleobiology, an expanding field, employs taphonomy tools to investigate...
www.scielo.br
Reposted by Damon Matthews
NEW – Analysis: Clean energy just put China’s CO2 emissions into reverse for first time | @laurimyllyvirta.bsky.social

Read here: buff.ly/6eAcjRU
There is no linearity assumption in how the warming rate is typically estimated

Also calling an entire scientific community idiotic is a rather bold statement not based on any actual evidence
Yes that looks about right
Absolutely you can! But the 5th percentile means we have a 5% chance of exceeding 2C in the next 15 years, not 90% as you led this string with.
My whole point was that a linear trend over only 10 years is (as you so nicely put it) linear nonsense. A linear trend through the 10 years from 2004 to 2014 gives almost no warming at all which was clearly an underestimate. Similarly the trend from 2014 to 2024 is an overestimate of the true rate
If you so the math on the Copernicus estimate (1.39C now and reaching 1.5C by Hune 2029), they are using 0.26C per decade
It’s not going to change dramatically — one additional year has limited power to shift the long-term trend

If Hansen’s estimate is just a 10-year trend drawn through the observations, I would not use this, in the same way that a 10-year trend through the hiatus period was wrong