Lmst

Annual growth rings; a side view. New blog post: https://wanderinweeta.blogspot.com/2026/01/tide-blasted-log.html #VancouverIsland #Trees #TreeRings #NaturePhotography

A log (red alder) on a shore. It has lost its bark, scoured off by rushing water, and successive layers of the cambium have been peeled off, leaving a patchwork of smooth, orange wood fringed with pale splinters, layered over the previous year's growth. The top layer is blackish. At the end of the log, the frayed heartwood protrudes.
The log rests on another, older log, suspended over smooth, water-scrubbed stones. At the back there's a similar log, but this one is darker, rotting away.

Annual growth rings; a side view. New blog post: https://wanderinweeta.blogspot.com/2026/01/tide-blasted-log.html #VancouverIsland #Trees #TreeRings #NaturePhotography

Multi-Disciplinary Reconstruction Of Debris Flow Events And Dynamics In The Northern Apennines, Italy - A Multiscale Approach Linking Ground Evidence With Climatic Triggers
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https://doi.org/10.1016/j.catena.2025.109708 <-- shared paper
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#GIS #spatial #mapping #engineeringgeology #massmovement #geology #landslide #debrisflow #multidisciplinary #geomorphology #pluvial #precipitation #dendrogeomorphological #treerings #dendrochronology #dating #chronology #reconstruction #geomorphmetry #processmodel #flowchart #spatialanalysis #spatiotemporal #mountains #orthophotos #historicphotos #geopedology #soil #hydraulic #alpedisucciso #trees #vegatation #downslope #risk #hazard #assessment #remotesensing #water #hydrology #rainfall #records #NorthernApennines #susceptibility #Italy

Tree Story by Valerie Trouet, 2020

The History of the World Written in Rings
Children around the world know that to tell how old a tree is, you count its rings. Few people, however, know that research into tree rings has also made amazing contributions to our understanding of Earth's climate history and its influences on human civilization over the past 2,000 years.

#books
#nonfiction
#trees
#TreeRings
#dendrochronology

In her captivating new book, Tree Story, Valerie Trouet reveals how the seemingly simple and relatively familiar concept of counting tree rings has inspired far-reaching scientific breakthroughs that illuminate the complex interactions between nature and people.
Trouet, a leading tree-ring scientist, takes us out into the field, from remote African villages to radioactive Russian forests, offering readers an insider's look at tree-ring research, a discipline formally known as dendrochronology. Tracing her own professional journey while exploring dendrochronology's history and applications, Trouet describes the basics of how tell-tale tree cores are collected and dated with ring-by-ring precision, explaining the unexpected and momentous insights we've gained from the resulting samples.
Blending popular science, travelogue, and cultural history, Tree Story highlights exciting findings of tree-ring research, including the fate of lost pirate treasure, successful strategies for surviving California wildfire, the secret to Genghis Khan's victories, the connection between Egyptian pharaohs and volcanoes, and even the role of olives in the fall of Rome. These fascinating tales are deftly woven together to show us how dendrochronology sheds light on global climate dynamics and uncovers the clear links between humans and our leafy neighbors.

🌊❄️ Did you know winter flow in #Siberia’s Yenisei River has surged by 80% in just 25 years? Using tree rings to reconstruct 300 years of river history, Irina P. Panyushkina, David M Meko and co-researchers uncovered unprecedented increases in winter discharge, likely driven by permafrost thaw and #Arctic warming. Learn more from their dataset & article at https://doi.org/10.25422/azu.data.17086889 & https://doi.org/10.1088/1748-9326/ac3e20. Image: Panyushkina et al (2021). CC BY 4.0 #OpenData #OpenScience #ClimateChange #TreeRings

Observed and WBM simulated Nov–Apr and Oct–Sept seasonal discharge of the Yenisei River at Kyzyl gauge. WBM simulated discharge derived from CRU climate drivers. Table S2 shows the model statistics.

I did something.
It's about the ColdBlob or SubPolarGyre or AMOC.
Specifically, about finding proxy locations on land for its annual evolution.

Taking SPG average sst in the months DJF and MAM, and computing also their year-on-year growth rate.

Then I computed the growth rate for DJF and MAM in all coordinates on land using Era5-Land 1951-2025.
And when the growthrate matches that of SPG within ±0.5 °C, it gets a ✅ .
6 ✅ per decade gets a 🔵 and counts toward selection.
Some more exclusion criteria applied, and I get a list of 315 locations on land for 🔵matching DJF growthrate, and a whopping additional 11,460 locations for MAM
In a 0.1x0.1 grid.

All DJF locations are in Papua. No proxies I know of have been recovered from Papua yet. I know all speleothems / stalagmites in caves🔴 , and all treerings ever analyzed🟢 , thanks to #NOAA .

But MAM °C has more locations. All of Indonesia basically is THE SPG in terms of growthrate. A few trees and speleothems match, one cave covers the whole #Holocene 🖖🏽
Large patches in Africa also match SPG in MAM. But only 2 short treering studies exist. No caves.
Middle and South America has plenty matching SPG MAM too, and a handful of trees and caves.

Yay.

#AMOC #climateChange #citizenscience #proxy #climateproxies #ColdBlob #SubPolarGyre
#Speleothem #treerings

Google Earth screenshot of parts of South America and Africa.
Grey circles are locations where MAM growthrate is near-regularly very much like the growthrate in the SPG sst.
They're clustered in several patches in both continents.
Green circles are treering studies, red circles are speleothem studies from caves.
This screenshot is not usuable for discerning matching locations of proxy and MAM growthrate. It's only an illustration of the results.

Tell me Y
Ain't nothing like a heartwood ache

#wood #Holz #woodGrain #nature #Natur #tree #Baum #Baumstamm #treeTrunk #Baumstumpf #treeRings #growthRings #Jahresringe #TextureTuesday

A close-up photograph of a cross-section of a tree trunk, showcasing its intricate and natural patterns. The image highlights the concentric growth rings, which radiate outward from the centre, revealing the tree’s age and history. A prominent vertical crack runs through the middle of the trunk, adding texture and depth to the scene.

The rich, earthy tones of brown and amber dominate the image, accentuating the organic beauty and complexity of the wood grain. The detailed texture and lines create a visually captivating and almost abstract composition, evoking a sense of nature’s enduring strength and resilience.

Today is the last day of the fundraiser I am holding for The Trevor Project, the leading suicide prevention organization for LGBTQ+ young people.
This one-time sale is available exclusively to subscribers of my newsletter. DM me and I’ll send you the link.

Among the works offered is this early drawing from 2005, Where I imagined every piece of clothing I own—neatly folded, stitched end to end, and rolled into a dense spiral.
#textileart #clothingsculpture #fibreart #treerings

14,000 Years Ago, The Most Powerful Solar Storm Ever Recorded Hit Earth - This Event Establishes A New Worst-Case Scenario
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https://www.space.com/astronomy/sun/14-000-years-ago-the-most-powerful-solar-storm-ever-recorded-hit-earth-this-event-establishes-a-new-worst-case-scenario <-- shared technical article
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https://doi.org/10.1016/j.epsl.2025.119383 <-- shared paper
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“A storm as ferocious as the one of 12,350 BC would likely cause complete mayhem if it were to strike Earth and its surrounding space today..."
#spaceweather #prehistoric #extremesolarparticleevents #CCMSOCOL #14CEx #Radiocarbon #GlacialEpoch #solarstorm #infrastructure #risk #hazard #radiocarbon #IceAge #model #modeling #glacial #climate #geomagnetism #magnetic #protons #carbon14 #Quaternary #geology #treerings

fractal message

#Fractal #Abstract #Wood-like #Light #TreeRings #Organic #WatercolorStyle #Texture #Portal #Circular #Teal #Purple #Pink #Blue #Orange #Gold
#Img2img #AiArt #AiArtists #AiArtCommunity #StableDiffusion

in real life: https://aieris.art/featured/fractal-message-eris-and-ai.html

$A radiant abstract resembling a cross section of a tree, with concentric rings that have grown with various patches of purple, pink, blue, teal, and gold as well as natural wood colors, with a glowing center resembling a portal type door. Enigmatic message-like fractal patterns emanate from left and right of the gold central ring outward. Watercolor style.$

Old growth forests in eastern Canada show that the climate started changing almost 100 years ago
#Canada #ClimateChange #OldGrowthForests #TreeRings #Environment #SnowPack #RiverFlow #Caribou #Hydropower #DroughtHistory #Forests #ForestEcology #ClimateData
https://the-14.com/old-growth-forests-in-eastern-canada-show-that-the-climate-started-changing-almost-100-years-ago/

When you have a look at tree rings on a stump, you can have a lot of philosophical questions.

I had one very real one: Why does all my body hurt after cutting down trees? 😂
#treestump #stump #treerings

The history of a tree, shown in annual rings, fungal zone lines, dry rot, moss. New blog post: https://wanderinweeta.blogspot.com/2025/02/written-in-runes.html #VancouverIsland #Trees #Fungus #TreeRings #Moss

A recently cut tree trunk. The cross-section shows different zones: moss on the outside, a narrow black line of bark, then brown, then a wide yellow band, then more brown, then the central part, an orangey brown. There is a section of dry rot, dark and full of holes. And around the yellow band, thin black lines outline darker zones.

"Determining the degree to which shifting drought conditions around the world are attributable to natural hydroclimatic variability and how much they are caused by climate change is a complicated task. Scientists often use complex computer models to simulate past climate variability and to identify unprecedented drought conditions".

#droughts #treerings #climatevariability
https://phys.org/news/2025-02-tree-reveal-climate-driven-drought.html

"A study tracking rainfall patterns over thousands of years has found that more arid periods coincided with ages of dynastic turmoil in China—highlighting a historical link between climate stress and social unrest".

#treerings #dynastic #china #arid #ClimateStress
https://phys.org/news/2025-02-ancient-tree-uncover-climate-impact.html