Yan Boulanger
LightNews LightNews
banner
trailgeek.bsky.social
Yan Boulanger
@trailgeek.bsky.social
1.9K followers 1.7K following 97 posts
Research scientist in Forest Ecology🌲| Working on climate change stuff and wildfires🔥| Like trail running and singing in my car
Posts Replies Media Videos
Reposted by Yan Boulanger
climatologist49.bsky.social
Europe had its least snowy winter (Dec-Feb) in over 50 years. #ThisIsFine
March 9, 2025 at 2:52 PM
Reposted by Yan Boulanger
climatologist49.bsky.social
Q: Have winter (Dec-Feb) temperatures have changed (trend) over the last 85 years?

A: F*ck
March 6, 2025 at 10:33 PM
trailgeek.bsky.social
Imagine if they also had to deal with the Phoenix pay system...
dangaristo.bsky.social Dan Garisto @dangaristo.bsky.social · Mar 3
Confirmed with a source. Here's a screenshot of the email sent to staff today.
March 3, 2025 at 5:12 PM
Reposted by Yan Boulanger
zacklabe.com
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.
March 3, 2025 at 4:39 PM
Reposted by Yan Boulanger
zacklabe.com
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.
March 3, 2025 at 12:38 AM
Reposted by Yan Boulanger
wildwoods.bsky.social
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
March 2, 2025 at 6:36 PM
Reposted by Yan Boulanger
climatologist49.bsky.social
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!
March 1, 2025 at 4:16 PM
Reposted by Yan Boulanger
joncooper-us.bsky.social
Pass it on.
#StandWithUkraine
February 28, 2025 at 8:44 PM
Reposted by Yan Boulanger
jeannetteeggers.bsky.social
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
February 27, 2025 at 8:48 AM
Reposted by Yan Boulanger
fisherdanar.bsky.social
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...
February 27, 2025 at 11:28 AM
trailgeek.bsky.social
Such conclusions also apply to #forest landscape #model projections over species distribution models
February 24, 2025 at 1:35 PM
Reposted by Yan Boulanger
zacklabe.com
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.
February 23, 2025 at 9:37 PM
Reposted by Yan Boulanger
zacklabe.com
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.
February 22, 2025 at 2:56 PM
Reposted by Yan Boulanger
climate.noaa.gov
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...
February 20, 2025 at 3:25 PM
trailgeek.bsky.social
🔥🌲 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
February 20, 2025 at 2:49 PM
Reposted by Yan Boulanger
zacklabe.com
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.
February 19, 2025 at 1:02 PM
Reposted by Yan Boulanger
ryankatzrosene.bsky.social
❗️Highest temperature ever recorded this early in the year across the Northern Hemisphere.
February 15, 2025 at 2:42 PM
trailgeek.bsky.social
1/ 🌲🔬 New Research Alert! 🌡️🦋

#ClimateChange is reshaping forest ecosystems, and the spruce budworm (Choristoneura fumiferana), a major boreal forest defoliator, is feeling the heat! 🔥

Our latest study in PLOS Climate reveals some striking trends. 🧵👇
February 15, 2025 at 2:35 PM
Reposted by Yan Boulanger
zacklabe.com
Monday ice update - #Arctic sea ice extent is currently the *lowest* on record (JAXA data)

• about 780,000 km² below the 2010s mean
• about 1,450,000 km² below the 2000s mean
• about 2,010,000 km² below the 1990s mean
• about 2,370,000 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.
February 10, 2025 at 1:02 PM
Reposted by Yan Boulanger
zacklabe.com
Sometimes it is only one side of the #Arctic that experiences anomalously low conditions during winter, but this year we are seeing the sea ice edge on *both* the Atlantic & Pacific sectors at very low levels for this time of year. This is contributing to the historic record low for early February.
Graphic showing a line graph time series of daily Arctic sea ice extent in the Pacific sector of the Arctic (Bering Sea and Sea of Okhotsk) for each year from 1979 to 2024. This year is shown in red. Purple to white color shading is used for each other year's line. There is a long-term decreasing trend for every day of the year. Graphic showing a line graph time series of daily Arctic sea ice extent in the Atlantic sector of the Arctic (Greenland + Barents + Kara Seas) for each year from 1979 to 2024. This year is shown in red. Purple to white color shading is used for each other year's line. There is a long-term decreasing trend for every day of the year.
February 7, 2025 at 1:12 AM
Reposted by Yan Boulanger
copernicusecmwf.bsky.social
How unusual were 2023 and 2024 compared to the global warming trend, averaging an increase of around 0.2°C per decade?

Dive into the analysis of anthropogenic and natural factors 👉 bit.ly/40kQpcz
February 5, 2025 at 11:06 AM
Reposted by Yan Boulanger
wxnb.bsky.social
More acres have been burned by wildfires in January 2025 across California than in all the Januarys of the past 30+ years combined.

Unreal.
February 1, 2025 at 6:24 PM
Reposted by Yan Boulanger
jjrennie.bsky.social
Why I’m not leaving the federal workforce (for now). A thread about my career goals, and how an elementary school student changed my entire worldview.
January 29, 2025 at 9:42 PM
Reposted by Yan Boulanger
jakubnowosad.com
🚨 After years of development, the new version of #rstats tmap (4) is now available on CRAN! 🎉 Huge thanks to author Martijn Tennekes and all contributors.

🔧 Install: `install.packages("tmap")`
📚 Vignettes: https://buff.ly/4aAYNbq
📖 Book Chapter: https://buff.ly/43TokaF

#maps #tmap #rspatial
A tmap logo A screenshot of the tmap CRAN webpage. A map from tmap vignette A map from tmap vignette
January 29, 2025 at 3:00 PM
Reposted by Yan Boulanger
climateofgavin.bsky.social
Interested in how climate model projections have matched up to reality?

RealClimate: Comparison Update 2024 www.realclimate.org/index.php/ar...
Comparison Update 2024
One more dot on the graphs for our annual model-observations comparisons updates. Given how extraordinary the last two years have been, there are a few highlights to note. First, we have updated...
www.realclimate.org
January 27, 2025 at 10:48 PM