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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

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Reposted by Yan Boulanger
Climatologist49 @climatologist49.bsky.social · 09/03/2025
Europe had its least snowy winter (Dec-Feb) in over 50 years. #ThisIsFine
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Climatologist49 @climatologist49.bsky.social · 06/03/2025
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 · 03/03/2025
Imagine if they also had to deal with the Phoenix pay system...
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Zack Labe @zacklabe.com · 03/03/2025
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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Zack Labe @zacklabe.com · 03/03/2025
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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Evan Frost @wildwoods.bsky.social · 02/03/2025
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...
yahoo.com
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.
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Climatologist49 @climatologist49.bsky.social · 01/03/2025
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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Jon Cooper @joncooper-us.bsky.social · 28/02/2025
Pass it on. #StandWithUkraine
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Jeannette Eggers @jeannetteeggers.bsky.social · 27/02/2025
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"
theguardian.com
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
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Dana R. Fisher (aka the Apocalyptic Optimist) @fisherdanar.bsky.social · 27/02/2025
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 · 24/02/2025
Such conclusions also apply to #forest landscape #model projections over species distribution models
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Reposted by Yan Boulanger
Zack Labe @zacklabe.com · 23/02/2025
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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Zack Labe @zacklabe.com · 22/02/2025
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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NOAA Climate.gov @climate.noaa.gov · 20/02/2025
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 · 20/02/2025
🔥🌲 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
youtube.com
Alerte climat - Les arbres
YouTube video by Machin Club
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Reposted by Yan Boulanger
Zack Labe @zacklabe.com · 19/02/2025
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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Ryan Katz-Rosene, PhD @ryankatzrosene.bsky.social · 15/02/2025
❗️Highest temperature ever recorded this early in the year across the Northern Hemisphere.
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Yan Boulanger @trailgeek.bsky.social · 15/02/2025
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. 🧵👇
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Zack Labe @zacklabe.com · 10/02/2025
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.
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Zack Labe @zacklabe.com · 07/02/2025
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.
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Copernicus ECMWF @copernicusecmwf.bsky.social · 05/02/2025
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
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Nahel Belgherze @wxnb.bsky.social · 01/02/2025
More acres have been burned by wildfires in January 2025 across California than in all the Januarys of the past 30+ years combined. Unreal.
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Jared Rennie @jjrennie.bsky.social · 29/01/2025
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.
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Jakub Nowosad @jakubnowosad.com · 29/01/2025
🚨 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: buff.ly/4aAYNbq 📖 Book Chapter: buff.ly/43TokaF #maps #tmap #rspatial
A tmap logoA screenshot of the tmap CRAN webpage.A map from tmap vignetteA map from tmap vignette
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Gavin Schmidt @climateofgavin.bsky.social · 27/01/2025
Interested in how climate model projections have matched up to reality? RealClimate: Comparison Update 2024 www.realclimate.org/index.php/ar...
realclimate.org
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...
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Robert Rohde @rarohde.bsky.social · 28/01/2025
Despite the recent cold in the USA, and the presence of a (weak) La Niña in the Pacific, January is on track to be the warmest January on record. 😬
Time series or daily global temperature anomalies from ERA5.
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Sarah McAnulty, Ph.D. @sarahmackattack.bsky.social · 28/01/2025
Many of us are really feeling helpless. This feeling is why I started @skypeascientist.bsky.social 8 years ago. We were doing the exact same thing then (currently feels worse?). I have an action you can take today. Tell an educator about our program. Connect kids with science in spite of all this.
A hot pink flip phone has a DNA stand on the screen and the text says “text a teacher “you can get matched with a scientist for a virtual q&a in your classroom for free with Skype a scientist”
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Ben Stone @benstemon.bsky.social · 28/01/2025
NSF PRFB POSTDOCS: Pull the remainder of this funding cycle’s stipend, all remaining research funds, and all remaining travel funds (if you have them). Do it before 5PM today. Per instructions from multiple NSF POs. If you’re not already on the PRFB slack, DM me and I’ll send you an invite
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Peter Gleick @petergleick.bsky.social · 28/01/2025
This project tracks government attempts to restrict or prohibit scientific research, education, or discussion, or the publication or use of scientific information. Read more about the tracker and related... Or contribute to the database. #science climate.law.columbia.edu/Silencing-Sc...
climate.law.columbia.edu
Silencing Science Tracker | Sabin Center for Climate Change Law
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Jessica Tierney @leafwax.bsky.social · 27/01/2025
For my first scientific post here, I want to talk about the Phanerozoic temperature record we published last Fall, which unfortunately has been making rounds in the climate denier circuit 👀 First though hopefully you can appreciate the beauty of this reconstruction ✨...
Earth's temperature history for the past 500 million years
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Michelle Wille @duckswabber.bsky.social · 27/01/2025
Between 2019 and 2023, researchers paid $8.968 billion to make papers open access. Imagine what else could be done with this money if it wasnt paid to for profit publishing companies... 👉 arxiv.org/abs/2407.16551
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Yan Boulanger @trailgeek.bsky.social · 20/01/2025
1/ 🚨 New Paper Alert! 🚨 "Timber harvesting was the most important factor driving changes in vegetation composition, as compared to climate and fire regime shifts, in the mixedwood temperate forests of Temiscamingue since AD 1830" 👉 link.springer.com/article/10.1... A🧵
link.springer.com
Timber harvesting was the most important factor driving changes in vegetation composition, as compared to climate and fire regime shifts, in the mixedwood temperate forests of Temiscamingue since AD 1...
Context The vegetation composition of northeastern North American forests has significantly changed since pre-settlement times, with a marked reduction in conifer-dominated stands, taxonomic and funct...
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Climate News @climatenews.bsky.social · 17/01/2025
Air monitoring station records biggest ever jump in atmospheric CO2
newscientist.com
Air monitoring station records biggest ever jump in atmospheric CO2
Wildfires and fossil fuel burning in 2024 contributed to the biggest annual rise in atmospheric CO2 levels ever recorded at the Mauna Loa Observatory in Hawaii
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Yan Boulanger @trailgeek.bsky.social · 12/01/2025
Our new publication on the impacts of #climatechange and #forestmanagement on hemiboreal and boreal #bird species distribution at a supraregional scale in North America !
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Yan Boulanger @trailgeek.bsky.social · 12/01/2025
A masterpiece thread by @weatherwest.bsky.social explaining the links between #climatechange and the recent catastrophic wildfire events in SoCal.
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Dr. Crystal A. Kolden @pyrogeog.bsky.social · 09/01/2025
Here's the reality about the #LAFires this week: this isn't the first time ANY of these places have burned. Not even close. In 2018, we mapped CA fire history to look at fire frequency across SoCal. Santa Monica Mtns area burns more than anywhere else -- up to once per decade in a given spot. 🧵
Map showing the number of times a location has burned in SoCal and which kind of fire it was: one burning under Santa Ana winds, or one that was a summer, fuel-driven fire without Santa Ana winds. Malibu area had burned at least 8 times from 1900-2017, and has burned twice now since. Image from Kolden and Abatzoglou (2018): https://www.mdpi.com/2571-6255/1/2/19
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Katharine Hayhoe @katharinehayhoe.com · 10/01/2025
A disaster is a function of three things: the hazard itself, people's vulnerability to the hazard, and their exposure. @rebeccasolnit.bsky.social explains eloquently how the LA fires are a perfect storm of all three. Read more:
theguardian.com
The chronicle of a fire foretold | Rebecca Solnit
The current fires in Los Angeles are reminders of the costs of forgetting
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Erwan Rivault @erwanrivault.com · 10/01/2025
NEW: 2024 has just been confirmed as the warmest year on record, and the first to breach the 1.5C threshold. We used a ridgeline (Joy Division inspired) chart to visualise daily temperature anomalies since 1940. 2024 clearly stands out with 100% of its days above 1.3C and 75% above 1.5C.
Ridgeline chart showing the distribution of global daily air temperature differences from the pre-industrial reference period (1850-1900), for every year between 1940 and 2024. Each individual year resembles a hill, shaded in a darker shade of red and further to the right for warmer years. The trend is clearly towards warmer years, with 2024 standing out as first year above 1.5C.
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Governor Gavin Newsom @governor.ca.gov · 07/01/2025
On the ground in Pacific Palisades and getting briefed by @calfire.bsky.social on the #PalisadesFire in Los Angeles. Californians in the affected areas should stay alert and follow evacuation orders from local authorities ➡️ ready.ca.gov
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Yan Boulanger @trailgeek.bsky.social · 20/12/2024
🔥 In 2023, wildfires burned a record-breaking 15 million hectares in Canada—more than twice the previous record. Our new paper in Nature Communications explores the drivers behind this catastrophic season. 🌍 [Link: www.nature.com/articles/s41... 🧵 (1/)
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Cooperstreaming ♿️ @cooperstreaming.bsky.social · 14/12/2024
When I had a violent stalker who would graphically describe how he would have me gang raped, puncture my organs and and break all my bones, I was told the police "couldn't do anything". Consider this a reminder that they absolutely ✨can✨ do something. They just don't care about YOU.
A screenshot of a social media post that states a Florida woman was arrested this week after allegedly threatening a health insurance provider. Lakeland Police said the woman became increasingly upset during the call which she ended with delay denied depose you people are next. 

On the left is a mugshot of Briana Boston, the middle aged white woman with blonde hair and a blue shirt. On the left is the mugshot of Luigi mangioni, He is a white man in his twenties with dark curly hair and thick eyebrows.
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Zack Labe @zacklabe.com · 12/12/2024
#Arctic sea ice extent has fallen to a record low for today's date (previously was 2016), which is related to particularly low sea ice in the outer marginal seas (e.g. record low in Hudson Bay). This is also the first new daily records set this year. Data: 'daily' NSIDC: nsidc.org/data/seaice_...
Line graph time series of 2024's daily Arctic sea ice extent compared to 1981-2010 climatological statistics and the year 2016. The graph shows the seasonal cycle, and ice-free conditions are indicated at 1 million square kilometers. Sea ice is currently well below average for the early December.
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Zack Labe @zacklabe.com · 12/12/2024
It's been a notable year for sea ice in the Hudson Bay region of the #Arctic. Growth has been record late so far this freeze season (see my earlier sea ice post today too) Each line represents one year from 1979 (purple) to 2023 (white). 2024 is in red. Data from NSIDC using satellite observations.
Line graph time series showing daily Arctic sea ice extent in the Hudson Bay for 2024 compared to each year from 1979 to 2023. There is a large seasonal cycle on this graph and a long-term decreasing trend for days during the melt season from June to December.
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Zack Labe @zacklabe.com · 13/12/2024
Trends in December temperatures over land areas for the last 50 years... Data from NOAAGlobalTemp v6.0.0 (www.ncei.noaa.gov/products/lan...)
Global map showing surface air temperature trends for each December from 1974 to 2023. Only land areas are shown. Red shading is shown for warmer temperature trends, and blue shading is shown for colder temperature trends. Data is from NOAA/NESDIS/NCEI NOAAGlobalTempv6.0.0. The temperature trend scale is from -0.5°C/decade to +0.5°C/decade. Most all areas are warming, except for parts of Antarctic and eastern Asia.
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Altmetric @altmetric.com · 03/12/2024
BLUESKY MEGA-THREAD Altmetric is thrilled and also LITERALLY RELIEVED to officially announce: We are now tracking research attention as it happens on Bluesky! We have been picking up posts on the site since late Oct. Our team is on Bluesky all day answering questions. Let's get into it!
Blueksy Mentions are now in Altmetric.

It's been 84 years meme

#AcademicSky #HigherEd #MedSky #HMSky #Altmetrics #Medlibs #Metascience
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Yan Boulanger @trailgeek.bsky.social · 01/12/2024
As mentioned by @meteomedia.bsky.social, several cities in #Quebec have recorded their warmest meteorological fall (SON) in 2024 since record began. A +3°C anomaly is quite something for a 3-month period. #wx
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Ben Bond-Lamberty @benbondlamberty.bsky.social · 22/11/2024
Attending #AGU24 in-person and thinking about publishing your research? I’ll be part of the AGU Editor Rapid Review sessions. 🗓 When: Thursday 12/12 1100-1300 📍 Where: Open Science Pavilion, Exhibit Hall, near the AGU Publications booth 📅 Book your appointment here: t.co/3UQ2oVK21o #AGUPubs
Come meet Ben Bond-Lamberty, Editor of JGR:Biogeosciences!
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Rupert Seidl @rupertseidl.bsky.social · 27/11/2024
Important finding for impact modelers by @kornhuber.bsky.social et al.: Climatic extremes change faster/ more severely than anticipated by climate models. The consequences anticipated with impact models (based on climate model-driven forcings) might thus be conservative. www.pnas.org/doi/10.1073/...
pnas.org
Global emergence of regional heatwave hotspots outpaces climate model simulations | PNAS
Multiple recent record-shattering weather events raise questions about the adequacy of climate models to effectively predict and prepare for unprec...
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Yan Boulanger @trailgeek.bsky.social · 27/11/2024
Offre de #stage/#Internship possibily Impacts of time since last #wildfire on forest composition and structure of the Lac Hebecourt islands #uqat
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Robbi Bishop-Taylor 🛰️🌏 @satellitesci.bsky.social · 27/11/2024
One of my favourite data discoveries this year: Google's mind-blowing ARCO-ERA5 dataset: hourly data for ~300 climate variables, available globally from 1940! 🤯 Loadable with a single line of Python code from a single cloud-friendly Zarr file! Below: a month of wind waves + swell: 🌊
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