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Posts by Clément Jaffrelo

Dive watch worn over a wetsuit

Dive watch worn over a wetsuit

It's a pretty common occurrence with any full body suit.

3 weeks ago 1 0 1 0
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Using a 20-year period for comparing methane to CO2 is a terrible idea Short-term thinking makes for bad climate policy

Using a 20-year period to compare methane the CO2 is a terrible idea. It heavily discounts the future and locks in greater warming.

New York should move away from it, and instead set separate targets for CO2 and short-lived climate pollutants:

3 weeks ago 84 20 6 7
Vue sur un lac. 
Eau bleue, ciel bleu. Quelques nénuphars

Vue sur un lac. Eau bleue, ciel bleu. Quelques nénuphars

#UnJourUnePhoto
#Photocember
#Photography
#Photographie

4. Plat

Le lac de Grand Lieu en Loire Atlantique.
L'endroit le plus plat du département le moins haut de France.

4 months ago 105 8 5 0

Pigmy seahorse
Hammerhead shark
Ghost pipe fish
Mantis shrimp
Boxfish

4 months ago 0 0 0 0

For a similar-looking but less hopeful picture, you could try plotting measured CO2 concentration in the atmosphere compared to past emission reduction trajectories. 😐

5 months ago 0 0 0 0
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Every ton of CO2 matters :
@climatenerilie.bsky.social quantifies the climatic impacts of one large fossil fuel project and its implications for further human heat exposure or coral reef loss, and how committed emissions challenge climate pledges

www.nature.com/articles/s44...

6 months ago 91 42 1 2
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Dr. Jane Goodall filmed an interview with Netflix in March 2025 that she understood would only be released after her death.

6 months ago 38266 17027 828 2393
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Ces images donnent une vision déformée par rapport à la situation en France.

On y voit des grands projets (industrie, activités commerciales, infrastructures) et pas une seule maison.

En France, 64% de la consommation de terres est destinée à l'habitat, principalement pour la maison individuelle.

6 months ago 1 0 1 0
Carte de projets - Sun'Agri, agrivoltaïsme dynamique Découvrez les projets agrivoltaïques de Sun’Agri développés dans les régions qui souffrent le plus des changements climatiques.

Le PV surélevé couplé à de l'arboriculture ou viticulture semble plus pertinent, même s'il nécessite plus d'acier pour les supports.
Ex : sunagri.fr/carte-de-pro...

Avec le PV vertival couplé à des grandes cultures, les engins agricoles risquent de projeter des cailloux sur les panneaux.

6 months ago 1 0 0 0
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I wonder how Colin Farrell feels about casting directors asking specifically for a younger version of him, probably minus the Irish accent.

7 months ago 0 0 1 0

C'est une rupture avec l'idée même de rupture après un changement de gouvernement.

7 months ago 0 0 0 0
Sou Fujimoto's White Tree, an appartment building with a multitude of balconies
https://chroniques-architecture.com/arbre-blanc-sou-fujimoto/

Sou Fujimoto's White Tree, an appartment building with a multitude of balconies https://chroniques-architecture.com/arbre-blanc-sou-fujimoto/

If some perspective is needed, Sou Fujimoto's White Tree might prove to be a useful reference. It's hard to criticize a regular appartment building for having "too many balconies" after seeing this one.
© SFA-NLA-OXO

7 months ago 1 0 0 0

An argument against balconies could be made from an energy/CO2 perspective : balconies are particularly annoying/expensive to insulate properly (with proper fire safety and performance).

A similar energy-focused argument could be made against windows too, so this line of reasoning isn't flawless. 😅

7 months ago 4 0 1 0

Il semble malheureusement que le gouvernement a laissé cette "boussole" depuis longtemps au fond d'un placard, avec un aimant à côté, qui perturbe la lecture de la direction indiquée, dans les rares cas où il est prévu de la consulter.

7 months ago 1 0 1 0

NEW STUDY: How much CO2 can we safely store in geological formations?

In a new @nature.com study, we cross-check established academic and industry estimates with various risk factors.

We find a prudent geological CO2 storage limit that is about 10x smaller. /1

7 months ago 143 68 5 18

Merci de continuer à prendre la parole malgré ce contexte d'inertie politique consternante. 🙏

7 months ago 6 0 0 0

Not all long term carbon storage is geological though.
For instance, wood construction in buildings stores carbon for >100 years (until demolition, unless the materials are reused).
A potential assessment of all available methods would be an interesting read. 🤓

7 months ago 0 0 0 0
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Quand on va tracter après le boulot (éventuellement en costard) il y a une règle tacite qui impose de changer de tenue ? 🤔

7 months ago 0 0 1 0

"Le rga RESTE une cause de sinistres majeure" ?

Il serait plus juste de dire qu'il le devient plus que jamais.

Avant les années 2020 les coûts annuels des sinistres catnat restaient très loin du milliard d'euros. Pour la sécheresse exceptionnelle de 2022, le coût a dépassé 3 milliards d'euros.

7 months ago 1 0 0 0

Et les parents (d'enfants <10 ans) partiellement responsables des agissements de leurs enfants.
Et le rectorat qui a visiblement laissé la situation se détériorer.
Et le ministère qui n'a pas agi / pas anticipé.

7 months ago 1 0 0 0
DOE CWG STATEMENT (second paragraph of section 2.1.1, page 3): “Piao et al. (2020) noted
that greening was even observable in the Arctic.”
COMMENT: This statement implies that the Arctic greening signal was caused by elevated CO2
,
however that is not the scientific consensus. Piao et al. (2020) attribute the greening trend in the
Arctic predominantly to growing season length driven by warmer temperatures (see also Y.
Zhang et al., 2022). Piao et al. (2020) also note that this positive impact of increasing
temperatures appears to have weakened over the past four decades, “suggesting a possible
saturation of future greening in response to warmer temperature” (see also comment on
greenness trends related to Section 2.1.1, first sentence of Page 4). It is also important to put
Arctic greening more broadly into the context of the carbon cycle and other impacts. While
above-ground plants may have displayed more leaf area over the past decades, rising
temperatures also thaw permafrost and drive accelerated decomposition in highly carbon rich
soils (Turetsky et al., 2020), a process which is expected to accelerate as climate continues to
warm (Miner et al., 2022). Thus even with Arctic greening, high latitude terrestrial systems may
become net carbon sources to the atmosphere, causing an amplifying feedback (Braghiere et
al., 2023). Other risks to the Arctic linked to higher CO2

levels and rising temperatures are not
mentioned in this report (Virkkala et al., 2025). The Arctic is warming at a rate of 2 to 3 times the
global average, leading to thawing of permanently frozen soils (permafrost), with downstream
impacts including loss of structural support for buildings and subsidence, threatening
communities, roads, runways, and other assets across Alaska (Manos et al., 2025; University of
Alaska Fairbanks Institute of Northern Engineering US Army Corps of Engineers Alaska District
& Laboratory, 2019).

DOE CWG STATEMENT (second paragraph of section 2.1.1, page 3): “Piao et al. (2020) noted that greening was even observable in the Arctic.” COMMENT: This statement implies that the Arctic greening signal was caused by elevated CO2 , however that is not the scientific consensus. Piao et al. (2020) attribute the greening trend in the Arctic predominantly to growing season length driven by warmer temperatures (see also Y. Zhang et al., 2022). Piao et al. (2020) also note that this positive impact of increasing temperatures appears to have weakened over the past four decades, “suggesting a possible saturation of future greening in response to warmer temperature” (see also comment on greenness trends related to Section 2.1.1, first sentence of Page 4). It is also important to put Arctic greening more broadly into the context of the carbon cycle and other impacts. While above-ground plants may have displayed more leaf area over the past decades, rising temperatures also thaw permafrost and drive accelerated decomposition in highly carbon rich soils (Turetsky et al., 2020), a process which is expected to accelerate as climate continues to warm (Miner et al., 2022). Thus even with Arctic greening, high latitude terrestrial systems may become net carbon sources to the atmosphere, causing an amplifying feedback (Braghiere et al., 2023). Other risks to the Arctic linked to higher CO2 levels and rising temperatures are not mentioned in this report (Virkkala et al., 2025). The Arctic is warming at a rate of 2 to 3 times the global average, leading to thawing of permanently frozen soils (permafrost), with downstream impacts including loss of structural support for buildings and subsidence, threatening communities, roads, runways, and other assets across Alaska (Manos et al., 2025; University of Alaska Fairbanks Institute of Northern Engineering US Army Corps of Engineers Alaska District & Laboratory, 2019).

Our comment on the DOE CWG report is done. It tips the scales at 439 pages, approx. 3x longer than the DOE report.
This is related to Brandolini's law: The amount of energy needed to refute bullshit is an order of magnitude bigger than that needed to produce it.

Example: refuting one sentence.

7 months ago 366 137 11 25
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🌡️ Rares voire rarissimes en France au XXe siècle, les températures dépassant localement les 40 degrés sont devenues fréquentes depuis l’an 2000. Voici une carte animée localisant chaque année où les stations de Météo-France ont relevé ou dépassé 40 degrés (données au 17 août).

7 months ago 764 578 19 32

Probablement qqch de similaire à la même période.

8 months ago 0 0 0 0

Il s'agit très probablement de l'évolution à la baisse du barème MPR parcours accompagné à partir du 01/01/25, suite à l'arrêté du 04/12/24.

8 months ago 1 0 1 0

La "dynamique positive" correspond à l'atteinte des 10,000 dépôts mensuels pour les dossiers individuels.

Le niveau de juin 25 reflète uniquement l'accération des dépôts après l'annonce de l'interruption du dispositif.

8 months ago 1 0 1 0
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'One country, two systems' a success Chief Executive John Lee says in his signed article that Hong Kong has made impressive achievements under the “one country, two systems” policy since its return to the motherland, noting that the poli...

Officially HK is still a special case. The "One country, two systems" policy is a roaring success and will be continued beyond 2047.
www.news.gov.hk/eng/2024/07/...

Unofficially, less so.
If local citizens weren't expecting better, they'd have taken to the streets from 1997, not nassively later.

8 months ago 0 0 0 0
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2014 Hong Kong protests - Wikipedia

The transition period was supposed to last for 50 years.
It started to take a turn for the worse only 17 years after the handover. en.wikipedia.org/wiki/2014_Ho...

8 months ago 1 0 2 0

There's no dog autism public research because the government is controlled by aliens from Flat Jupiter. 🤓

8 months ago 3 0 0 0

Right then...

A quick review of the DOE's new 'critical review' of climate science. Whether it's worth a formal community response - I'm still not sure, but here's my first thoughts

/thread/

8 months ago 193 111 10 23
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Bercy exposé à une perte d'un demi-milliard d'euros dans l'hydrogène mobilité - LA LETTRE Après avoir fait le pari d'équiper les véhicules utilitaires de piles à hydrogène, les constructeurs comme Stellantis et Renault constatent les uns après les autres l'étroitesse du marché. L'État,

Qui aurait pu prédire que les VL hydrogène étaient un mauvais investissement ?
Tout le monde sauf Bercy visiblement. 🙄
www.lalettre.fr/fr/politique...

8 months ago 2 0 0 0