Lightnews — Scholar-powered news

Yan Boulanger @trailgeek.bsky.social · Apr 1

Same here... eh boboy

Yan Boulanger @trailgeek.bsky.social · Mar 22

With less sea ice in this area over the last few years, many more baby seals are stranded on the shore:
(In French)
ici.radio-canada.ca/nouvelle/214...

Des gestes illégaux à l’endroit de blanchons

Un nombre anormalement élevé de blanchons est observé depuis une semaine sur les plages de la Gaspésie et des Îles-de-la-Madeleine.

ici.radio-canada.ca

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Yan Boulanger @trailgeek.bsky.social · Mar 11

a cartoon of homer simpson is holding a newspaper that says old man yells at cloud

ALT: a cartoon of homer simpson is holding a newspaper that says old man yells at cloud

media.tenor.com

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Reposted by Yan Boulanger

Climatologist49 @climatologist49.bsky.social · Mar 9

Europe had its least snowy winter (Dec-Feb) in over 50 years. #ThisIsFine

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Reposted by Yan Boulanger

Climatologist49 @climatologist49.bsky.social · Mar 6

Q: Have winter (Dec-Feb) temperatures have changed (trend) over the last 85 years?

A: F*ck

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Yan Boulanger @trailgeek.bsky.social · Mar 3

Imagine if they also had to deal with the Phoenix pay system...

Dan Garisto @dangaristo.bsky.social · Mar 3

Confirmed with a source. Here's a screenshot of the email sent to staff today.

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Reposted by Yan Boulanger

Zack Labe @zacklabe.com · Mar 3

While all of this is happening to our scientific agencies, the current extent of sea ice globally remains at record low levels...

More visuals at zacklabe.com/global-sea-i...

Line graph time series of 2025's daily global sea ice extent in red shading compared to each year from 1979 to 2024 using shades of purple to white for each line. There is substantial interannual and daily variability. Seasonal cycles are visible. Note: the poles are affected by very different Earth system processes/seasonality. I am using 5-day running mean data.

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Reposted by Yan Boulanger

Zack Labe @zacklabe.com · Mar 3

Sunday ice update - #Arctic sea ice extent is currently the lowest on record (JAXA data)

• about 740,000 km² below the 2010s mean
• about 1,340,000 km² below the 2000s mean
• about 1,720,000 km² below the 1990s mean
• about 2,260,000 km² below the 1980s mean

Plots: zacklabe.com/arctic-sea-i... 🌊

Line graph time series of 2025's daily Arctic sea ice extent compared to decadal averages from the 1980s to the 2010s. The decadal averages are shown with different colored lines with purple for the 1980s, blue for the 1990s, green for the 2000s, and white for the 2010s. Thin white lines are also shown for each year from 2000 to 2024. 2025 is shown with a thick gold line. There is a long-term decreasing trend in ice extent for every day of the year shown on this graph between January and April by looking at the decadal average line positions.

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Reposted by Yan Boulanger

Evan Frost @wildwoods.bsky.social · Mar 2

Just another typical late winter season in the Pyrocene -- "Wildfires rage across the Carolinas...More than 175 wildfires burning across SC and additional fires in NC... Much of eastern US seaboard under increased fire risk." www.yahoo.com/news/wildfir...

Wildfires rage across the Carolinas; SC governor issues state of emergency

The National Weather Service issued advisories on Sunday from Georgia to New Jersey warning of an increased risk of wildfires.

www.yahoo.com

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Reposted by Yan Boulanger

Climatologist49 @climatologist49.bsky.social · Mar 1

December-February 2024-25 temperature ranking since 1895-96 according to Prism climate data. Globally, this was the 2nd warmest Dec-Feb period, but the Contiguous U.S. was the outlier. Congrats!

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Reposted by Yan Boulanger

Jon Cooper @joncooper-us.bsky.social · Feb 28

Pass it on.
#StandWithUkraine

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Reposted by Yan Boulanger

Jeannette Eggers @jeannetteeggers.bsky.social · Feb 27

This is very concerning.

"Earth’s plants and soils reached peak carbon dioxide sequestration in 2008 but proportion absorbed has been declining since, study finds"

Plants losing appetite for carbon dioxide amid effects of warming climate

Earth’s plants and soils reached peak carbon dioxide sequestration in 2008 but proportion absorbed has been declining since, study finds

www.theguardian.com

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Reposted by Yan Boulanger

Dana R. Fisher (aka the Apocalyptic Optimist) @fisherdanar.bsky.social · Feb 27

Another paper showing climate shocks lead to support for climate action among conservatives. Analyzing data collected in Florida, the paper finds Republican positions change after personally experiencing loss from climate-exacerbated extreme events.
www.sciencedirect.com/science/arti...

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Yan Boulanger @trailgeek.bsky.social · Feb 25

Don't forget that this is considering a species distribution model (SDM) When using a multimodel approach, which includes both SDM and process-based models, iy appears that aspen might take advantage of increased climate-induced disturbances. Up to a certain point...

https://onlinelibrary.wiley.com/doi/10.1111/gcb.16014

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Yan Boulanger @trailgeek.bsky.social · Feb 24

Such conclusions also apply to #forest landscape #model projections over species distribution models

Rupert Seidl @rupertseidl.bsky.social · Feb 24

Interesting work by van der Meersch et al. out in Ecology Letters, nicely illustrating that process-based models are more robust than correlative models for predicting species distributions under novel climatic conditions doi.org/10.1111/ele....

Paleorecords Reveal Biological Mechanisms Crucial for Reliable Species Range Shift Projections Amid Rapid Climate Change

Climate change has created an urgent need for reliable projections of species distributions. By hindcasting forest tree range shifts across Europe over the last 12,000 years, we show that process-exp...

doi.org

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Reposted by Yan Boulanger

Zack Labe @zacklabe.com · Feb 23

Looking at temperature anomalies over the last month (left), 3 months (center), and 12 months (right) across the #Arctic...

Data from doi.org/10.24381/cds... ⚒️

Three orthographic maps showing 2-m air temperature anomalies in January 2025, November 2024 to January 2025, and February 2024 to January 2025 in the Arctic region. Red shading is shown for warmer anomalies, and blue shading is shown for colder anomalies. Most areas are warmer than average. The mean temperature anomaly for each map is also displayed. Anomalies are calculated relative to a 1981-2010 baseline.

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Reposted by Yan Boulanger

Zack Labe @zacklabe.com · Feb 22

Ice Watch - Time to start tracking the annual maximum #Arctic sea ice extent. A new record is definitely possible this winter. Stay tuned.

Follow the daily data at zacklabe.com/arctic-sea-i.... Data from JAXA. ⚒️🥼❄️

Line graph time series of 2025's daily Arctic sea ice extent compared to decadal averages from the 1980s to the 2010s. Additional scatter points show the maximum extents from 2000 to 2024. There is a long-term decreasing trend in ice extent for every day of the year.

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Reposted by Yan Boulanger

NOAA Climate.gov @climate.noaa.gov · Feb 20

A trifecta of fire-friendly climate conditions fueled the January 2025 fires around Los Angeles: back-to-back wet winters that boosted vegetation, a record-dry fall, and extremely strong Santa Ana winds. See the map for how drought helped set the stage.

www.climate.gov/news-feature...

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Yan Boulanger @trailgeek.bsky.social · Feb 20

🔥🌲 Feux de forêt & climat : un sujet brûlant au Machin Club !

J’ai eu le plaisir de discuter de la saison record de 2023 et du rôle de la science pour mieux comprendre ces événements extrêmes. 🌍🔥

🎥 À voir ici 👉 www.youtube.com/watch?v=q_c0...

#FeuxDeForêt #Climat #ScienceEnAction #MachinClub

Alerte climat - Les arbres

YouTube video by Machin Club

www.youtube.com

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Reposted by Yan Boulanger

Zack Labe @zacklabe.com · Feb 19

Looking back at temperatures averaged over the last 3 months - find your location...

🟥 warmer than average
🟦 colder than average

Dataset (NOAAGlobalTempv6) described in doi.org/10.1175/BAMS...

Global map showing surface air temperature anomalies for the November 2025 to January 2025 period across the entire planet. Most all areas were warmer than average, especially in the Arctic. This data set is from NOAA's NOAAGlobalTempv6.0.0 using anomalies with a 1971-2000 climate baseline. Red is shown for warmer than average temperatures, and blue is shown for colder than average temperatures.

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Reposted by Yan Boulanger

Ryan Katz-Rosene, PhD @ryankatzrosene.bsky.social · Feb 15

❗️Highest temperature ever recorded this early in the year across the Northern Hemisphere.

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Yan Boulanger @trailgeek.bsky.social · Feb 15

5/ 🔗 Want to dive deeper? Read our full study here:
📖 journals.plos.org/climate/arti...

Recent climate change strongly impacted the population dynamic of a North American insect pest species

Climate change is redefining the dynamics of forest ecosystems globally, particularly through its impact on forest pest populations such as the spruce budworm (SBW, Choristoneura fumiferana [Clem.]), ...

journals.plos.org

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Yan Boulanger @trailgeek.bsky.social · Feb 15

4/ 🛠️ Why does this matter?
➡️ Changing pest distributions impact forest health & management
➡️ Increased defoliation risks in new areas
➡️ Need for proactive strategies to reduce vulnerability

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Yan Boulanger @trailgeek.bsky.social · Feb 15

3/ 🌎 Most importantly, climate change is a bigger driver of SBW dynamics than landscape changes!

This means forest ecosystems are being reshaped faster than we expected, requiring adaptive management strategies.

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Yan Boulanger @trailgeek.bsky.social · Feb 15

2/ 📈 Key findings (1950–2022):

📍 +68 km northward shift of suitable climate conditions (up to 200 km in some areas!)
⏳ Earlier phenological events & higher reproduction rates in the north
❄️ Increased winter mortality in the south due to warmer temperatures

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