Britta Jensen

*not that phreatic eruptions can’t be big and exciting too*

As a tephrochronologist though, I like a little bit of fresh magma mixed into an eruption. So phreatimagmatic, please and thank you.

This is so cool! I had an amazing undergraduate student right after I started my job, and his research project included looking at the 1842 eruption. We concluded it was not just a phreatic event, but a bit more exciting. I wish this letter had been available then.
🌋⚒️🧪

🔎You want to share your latest research in volcanology & tephra ? Don't hesitate to submit an abstract to one of the three #EGU2026 sessions or to contact us regarding the #GeoHorizons and #JQS Special Issues 🌋⚒️ #tephra #volcanology Details are provided in the flyer below 👇

@watershedlab.bsky.social
Makes me think (a bit tangentially) of your Globe article…. but in a place way less prone to earthquakes! 🧪⚒️

Come one, come all! It will be a great time at #EGU2026! COT will also be hosting a meeting and organizing a pub night.

Satellite-based estimation of the temporal evolution of temperature in the lower-middle stratosphere (LMS; 6–52 hPa; 21–35 km) within the ice-ring region

Hunga Tonga–Hunga Haʻapai eruption and the ice ring

Eruption of the Hunga Tonga–Hunga Haʻapai in 2022 was a unique phreatic eruption even where we can learn many things on the effects of explosive eruptions on the Earth system.
Eruption was so large that in the atmosphere formed transient ice ring.
www.nature.com/articles/s43...
🧪 ⚒️ #Geology

Abstract submission is open for #EGU2026!

Join our session ESSI3.6 "From Principles to Practice: Multidisciplinary Approaches to Data-Driven Tephra Research." Share your multidisciplinary research, workflows, best practices, and cyberinfrastructure.

meetingorganizer.copernicus.org/EGU26/sessio...

Isotopic evidence for elevated photorespiration during the last glacial period - Nature Geoscience Low carbon dioxide levels during the last glacial period enhanced photorespiration in trees across North America, indicating a decline in land plant productivity, according to measurements of clumped ...

Cool use of a clumped isotopologue in wood! - Isotopic evidence for elevated photorespiration during the last glacial period www.nature.com/articles/s41...

Another one of Zack’s posts that you want to like because his work is great, but can’t because what it says is definitively not likeable. My asters are still blooming in Edmonton. In November. We haven’t had a hard enough frost to kill them. That snow? Gone today, highs of 8 today, 12 (!) tomorrow.

“300 years on from the birth of James Hutton, these ideas are still relevant. They’ve laid the foundations of geology, but they also remind us that these ongoing processes that don’t stop”

Help make the deep time trail a reality. Donate today at www.crowdfunder.co.uk/siccar-point

Super interesting. And a nice follow up story on CBC. Would be nice if they grew their presence on Bluesky, ahem.
@cbcradiocanada.bsky.social

Current situation. Happens regularly. They should fix this, at least on the cross country trains. People saying sorry constantly as they block the aisle because there is no room for luggage. And then those bonking into luggage saying sorry as well. Kind of makes me feel like I am in Canada again 😂

We have limited edition replica Hutton Tassie Medals available as rewards if you donate to the #SiccarPoint #DeepTimeTrail crowdfunder: www.crowdfunder.co.uk/siccar-point

Timing and interaction of Pleistocene alpine glaciers at the northern margin of the Cordilleran Ice Sheet, southwest Yukon Stratigraphic and geomorphic analysis paired with 10Be surface exposure dating provides evidence of extensive local ice growth in the Ruby Range, sout…

Very happy to share another new paper. This one on an entirely different topic; the timing and interaction of alpine glaciers with at the northern margin of the Cordilleran Ice Sheet. www.sciencedirect.com/science/arti...

Purple Saxifrage peaking out from between the rocks at a high elevation

Few Seeded Draba flourish where only lichen does well on frost-shattered rocky ridges.

A beauty of an Orchid - the eastern fairy slipper, exploding in moist spots in the high elevation fir forest.

And Dryas integrifolia, Entireleaf Mountain Avens, dropping over the rocks on the nice dry south facing slopes at mid elevations.

Also, the beautiful flowers deserve a mention. The spring bloom was starting in earnest.

Looking towards the summit of Cinquefoil and the endless sea of mountain peaks to the north of Jasper.

My favourite erratic I stumbled across, split and balanced and huge. Just casually resting against the slopes of Hawk Mountain. The Athabasca river flowing east to the left and some old burn scars across the valley - not from last year’s devastating fires.

Some beauty erratics, including a few odd lithologies such as this metamorphic rock - a schist that had to have been brought over the continental divide from BC and outside of the Rockies. Cool! The ice was BIG.

A lovely little Gog Fm Quartzite erratic on the ridge of Cinquefoil mountain.

#fieldworkfriday! Early June was steep hikes in Jasper National Park looking for erratics. The Canadian Rockies are truly astounding. One of my favourite places on the planet, lucky I live pretty close! So many geology questions remain. Also nice to support Jasper after last year’s awful fires. ⚒️🧪🪨

Given the cost of some academic books these days I wonder if this could be seen as a legitimate grant expense… what a find. ⚒️

🚨New paper!

Our latest study, led by Sophie Vineberg, integrates proximal & distal tephra records to reveal the timing and dispersal of large explosive eruptions at Aso volcano (Japan) 🌋

🔗 doi.org/10.1016/j.jvolgeores.2025.108436

#tephra #volcanology #Aso #Japan #LakeSuigetsu #tephrochronology

Hello Bluesky! We’re excited to be here. Join us for updates on:

🔋 energy sources and distribution
🌲 forests and forestry
⛏️ minerals and mining
🛰️ earth sciences
🔌 energy efficiency
🔬 science and data

Hits a bit too close… gah. 😩

Over the last six weeks, SEES scientists Mengwen, Patrick, Helen & Andrea jointed the Beyond EPICA – Oldest Ice project, which aims to analyse the oldest ice on Earth – up to 1.5 million years old, beyond the 800,000 years previously covered – to understand more about Earth's climate 🧊🧪🥼 @bas.ac.uk

👋 Hello, Bluesky! We’re Radiocarbon, an international peer-reviewed journal (since 1959) dedicated to advancing radiocarbon research, from calibration and chronology to applications across archaeology, geology, environmental science, and more. We’re glad to be here. #Radiocarbon #Geochronology

@ualberta.bsky.social
How about showing EAS you also think we are worth supporting?The geoscience side has lost so many that we are losing research capacity and ability to teach our programs. Best rated in Canada. Top 5 in North America. But not for long. Investing in existing strengths pays too!

Hello folks! We're thrilled to announce that the 2025 University of Alberta Space Exploration Symposium will take place Wednesday, October 15th, Thursday October 16th, and Friday, October 17th. Stay tuned for more info about participation and our two fantastic keynote speakers! 🌟

The amazing Horsethief Canyon outside of Drumheller never gets old. Stunning landscape of Cretaceous fluvial sequence - Horseshoe Canyon Formation

Our mascot is scale for cryoturbated Pleistocene gravels - a remnant periglacial landscape in the Del Bonita uplands on the Milk River Ridge - one of the only spots in Alberta not over ridden by an ice sheet during the last glacial maximum.

A lunch break at Fort Steele. We found a goat. He was great.

After I told the students if they stick their heads into the freezing Kootenay River near canal flats they will be able to hear the silt hissing and gravel moving on the river bed. They did it and were blown away that I wasn’t lying!

I jumped ahead last #fieldworkfriday and forgot about our first year geology field school before Iceland. Amazing rocks, landscapes and students on a road trip through southern Alberta and SE BC. Drumheller to Waterton, Fernie and Jasper just to name a few spots. Glorious. ⚒️🧪🪨

5 people in a snowy park, 3 sitting on benches & the others social distancing, smiling & enjoying the company

8 people in a park, 2 sitting on benches, 1 sitting on the ground & 5 standing

Man making coffee, 2 others standing on a sunny cool morning

Man in a green canoe being towed by a man on a bike smiling

Dr Markland was the heartbeat of Friday’s @coffeeoutside.bsky.social in Edmonton.
Here’s a few of my favorite photos from over the years.
You made us all better humans for knowing you. RIP

Hanaa watching the IC check the concentration of SO4 in our samples. Make sure we have enough!

Was joined for the first week with @hanaayousif.bsky.social, now in Copenhagen learning all about the other aspects of ice core science. What a September!

Looking back at St. Andrew’s from West Beach

Walking along the Fife Coastal Path, so much to do here not in the office!

Melted ice core samples drying down!

Weighing out our samples to make sure we get enough to measure our sulphur isotopes

Also currently in (sunny?!) St. Andrews Scotland learning the mysteries of volcanic sulphur isotopes from ice cores with @oceanicandrea.bsky.social and the tephra crew. I want to thank @uniofstandrews.bsky.social and their amazing Global Fellowship scheme for making this opportunity possible. 🌋

Hardest thing is picking the photos! So many. Thanks so much to the team that organized it and my roomies including @icylava.bsky.social

Field tripper hiking up a valley to along the escarpment that the 2010 lava flows of Eyafjallajökul flowed over

Ignimbrite deposit of an eruption from to the north that was deposited around 50 ka years ago (i think!)

Incredible hyaloclastite deposits produced by an eruption under an ice sheet.

Amazing experience to do a glacier walk on Solheimajokull.

Have been laying low, but wanting do something light hearted, I will start sharing my summer for #fieldworkFriday. In May I joined the @iavcei.bsky.social @volc-ice.bsky.social field trip in Iceland. Stunning sunny days the entire time, so I can’t go back 🤣. Ready for future field work in NW BC! ⚒️🧪