Andy Bunn
@fakeandybunn.bsky.social
Dendrochronologist and data enthusiast. dplR, dplPy, xDater, openDendro
This is a silly headline and story. This fire is not particularly near the ancient BCP stand and is 70% contained.
April 2, 2025 at 8:42 PM
This is a silly headline and story. This fire is not particularly near the ancient BCP stand and is 70% contained.
This was a huge collaboration—dozens of co-authors, terabytes of data, and years of work. We’re excited to share it. Big thanks to the team, the field crews, and the data contributors.
April 2, 2025 at 6:57 PM
This was a huge collaboration—dozens of co-authors, terabytes of data, and years of work. We’re excited to share it. Big thanks to the team, the field crews, and the data contributors.
Our maps capture fine-scale spatial patterns that previous coarse-resolution maps missed—like shrub thickets in riparian zones, biomass loss from permafrost thaw slumps, or long-term fire recovery.
April 2, 2025 at 6:57 PM
Our maps capture fine-scale spatial patterns that previous coarse-resolution maps missed—like shrub thickets in riparian zones, biomass loss from permafrost thaw slumps, or long-term fire recovery.
Key findings:
• Arctic tundra holds ~3.7 Pg of aboveground plant biomass
• ~72% of that is woody
• Biomass and woody dominance both increase with growing season warmth (thawing degree days)
• Oro Arctic zones hold the most biomass per area
• Arctic tundra holds ~3.7 Pg of aboveground plant biomass
• ~72% of that is woody
• Biomass and woody dominance both increase with growing season warmth (thawing degree days)
• Oro Arctic zones hold the most biomass per area
April 2, 2025 at 6:57 PM
Key findings:
• Arctic tundra holds ~3.7 Pg of aboveground plant biomass
• ~72% of that is woody
• Biomass and woody dominance both increase with growing season warmth (thawing degree days)
• Oro Arctic zones hold the most biomass per area
• Arctic tundra holds ~3.7 Pg of aboveground plant biomass
• ~72% of that is woody
• Biomass and woody dominance both increase with growing season warmth (thawing degree days)
• Oro Arctic zones hold the most biomass per area
We modeled both total plant biomass (g/m²) and woody dominance (what % of biomass is shrubs or trees). These are crucial variables for ecosystem monitoring, carbon modeling, and climate feedbacks.
April 2, 2025 at 6:57 PM
We modeled both total plant biomass (g/m²) and woody dominance (what % of biomass is shrubs or trees). These are crucial variables for ecosystem monitoring, carbon modeling, and climate feedbacks.
So in this paper, we used:
✅ 636 field sites of plant biomass data
✅ Landsat satellite imagery (1984–2023)
✅ A new post-hoc topographic correction
✅ Machine learning (random forest + uncertainty modeling)
…to produce high-resolution biomass maps for 2020.
✅ 636 field sites of plant biomass data
✅ Landsat satellite imagery (1984–2023)
✅ A new post-hoc topographic correction
✅ Machine learning (random forest + uncertainty modeling)
…to produce high-resolution biomass maps for 2020.
April 2, 2025 at 6:57 PM
So in this paper, we used:
✅ 636 field sites of plant biomass data
✅ Landsat satellite imagery (1984–2023)
✅ A new post-hoc topographic correction
✅ Machine learning (random forest + uncertainty modeling)
…to produce high-resolution biomass maps for 2020.
✅ 636 field sites of plant biomass data
✅ Landsat satellite imagery (1984–2023)
✅ A new post-hoc topographic correction
✅ Machine learning (random forest + uncertainty modeling)
…to produce high-resolution biomass maps for 2020.
But we haven’t had a detailed, Arctic-wide map of how much plant biomass is out there—or how much of it is woody. Coarser maps (8 km, 300 m) missed key local variation.
April 2, 2025 at 6:57 PM
But we haven’t had a detailed, Arctic-wide map of how much plant biomass is out there—or how much of it is woody. Coarser maps (8 km, 300 m) missed key local variation.
The Arctic is warming faster than anywhere else on Earth, and tundra ecosystems are changing fast in response. Shrubs are expanding. Soils are thawing. Permafrost is vulnerable. Wildlife and human land use are shifting.
April 2, 2025 at 6:57 PM
The Arctic is warming faster than anywhere else on Earth, and tundra ecosystems are changing fast in response. Shrubs are expanding. Soils are thawing. Permafrost is vulnerable. Wildlife and human land use are shifting.
And TBH, I'm mostly just one of the data contributors. Katie and Logan did the heavy lifting here and this is a cool paper. So replace "we" with "they."
April 2, 2025 at 6:57 PM
And TBH, I'm mostly just one of the data contributors. Katie and Logan did the heavy lifting here and this is a cool paper. So replace "we" with "they."
And src here: github.com/AndyBunn/LEm...
GitHub - AndyBunn/LEmodels: Some unrefined models that I use in landscape ecology class
Some unrefined models that I use in landscape ecology class - AndyBunn/LEmodels
github.com
February 9, 2025 at 9:23 PM
And src here: github.com/AndyBunn/LEm...
This model runs fast locally and slowly on the free hosting service. Deployed here: andybunn.shinyapps.io/simpleCA/
Simple Species Sorting is an interactive Shiny application designed to show show how how species arrange themselves on a environmental gradient given simple niches and dispersal rules.
andybunn.shinyapps.io
February 9, 2025 at 9:23 PM
This model runs fast locally and slowly on the free hosting service. Deployed here: andybunn.shinyapps.io/simpleCA/
And sometimes spend way too much time turning them into apps. The students like them fine, but probably not enough to justify my life choices. Did I have to add in an animation button? No. No I did not.
February 9, 2025 at 9:23 PM
And sometimes spend way too much time turning them into apps. The students like them fine, but probably not enough to justify my life choices. Did I have to add in an animation button? No. No I did not.