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James Smith

@shelfyice.bsky.social

Marine geologist/glacial sedimentologist at the British Antarctic Survey interested in ice shelf/sheet history. Views my own

8 Posts258 Follower165 Folgt
William Colgan@glacierbytes.bsky.social · last mo.

Yes, our review article on Petermann Glacier is even more topical with its recent calving event! Whether you consider Petermann to be an ‘ice stream’ or a ‘glacier’, might influence how you think about the stability of Northwest Greenland. 🤓

ESA Earth Observation@esaearth.esa.int · last mo.

Earlier this month, a 76 sq km section of Petermann Glacier in northwest Greenland broke away. The newly formed tabular iceberg covers an area about the same size of Manhattan and is estimated to be up to 150 metres thick. This huge loss was captured by the Copernicus Sentinel-1 radar vision ⬇️

Geography at Durham@geogdurham.bsky.social · 7mo ago

Congratulations to our colleagues @erinmcclimate.bsky.social and Charlotte Spencer-Jones on the publication of their co-authored article in Nature Communications ‘Ocean heat forced West Antarctic Ice Sheet retreat after the Last Glacial Maximum’: www.bas.ac.uk/news/warm-oc...

Warm ocean water, not air temperature, drove massive Antarctic ice retreat after the last ice age  - British Antarctic Survey

A new study concludes that warm ocean water was the primary driver of major West Antarctic Ice Sheet retreat since the end of the last ice age 18,000 years ago.

bas.ac.uk

James Smith@shelfyice.bsky.social · 7mo ago

Pleased to see this finally out, involving a brilliant team @emawbey.bsky.social, @erinmcclimate.bsky.social, @krhendry.bsky.social, @polarrobs.bsky.social, @wellner.bsky.social, supported by @bas.ac.uk, @awi.de , @geogdurham.bsky.social and #Thwaites🧵⤵️ www.nature.com/articles/s41...

Ocean heat forced West Antarctic Ice Sheet retreat after the Last Glacial Maximum - Nature Communications

Amundsen Sea records show warm Circumpolar Deep Water drove major West Antarctic Ice Sheet retreat from 18,000–10,000 years ago. Subsequent cooling stabilized the grounding line, indicating ocean heat...

nature.com

SWAIS2C@swais2c.bsky.social · 9mo ago

We’ve wrapped up drilling at Crary Ice Rise with 228m of sediment core. This is an unprecedented record of the history of the West Antarctic Ice Sheet stretching back millions of years. Initial observations indicate the core includes periods of environmental change during past times of warming.

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SWAIS2C@swais2c.bsky.social · 9mo ago

We have successfully drilled 200 metres of sediment core from beneath the ice sheet at Crary Ice Rise! The pipe is still spinning - with a bit of time up our sleeve, we’re not stopping drilling yet, as we continue to drill back through the geological archive hidden beneath the ice. 📷 Ana Tovey

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SWAIS2C@swais2c.bsky.social · 9mo ago

We’ve got our eyes on the prize 24/7, through blowing snow, lashing winds and sunshine. With more than 100 metres of sediment core retrieved, we’re more than halfway towards our target of 200 metres. Co-Chief Huw Horgan shares this expedition update from our deep-field camp at Crary Ice Rise.

Dave Roberts@daveroberts2026.bsky.social · 10mo ago

Brilliant to see this paper rdcu.be/eUWMI by @NEGIS_Durham team & led by @louisecallard.bsky.social Work offshore with partners @awi.de revealing how ocean warming triggered ice shelf collapse @geogdurham.bsky.social @ncl-geography.bsky.social

Ocean driven retreat of the Northeast Greenland Ice Stream following the Last Glacial Maximum

Nature Communications - Warm Atlantic Water was a major driver of both initial NEGIS retreat from 21.6 ka BP and the collapse of its ice shelf ~15.2 ka BP. This study demonstrates the key role of...

rdcu.be

James Kirkham@jdkirkham.bsky.social · last yr.

Icebergs? The size of a city? 90 miles from the UK? Must be a joke, right? No! Our new paper in @natcomms.nature.com shows massive tabular icebergs broke off the UK in the last ice age before the UK’s ice shelves disintegrated from climate warming. 🧵 www.nature.com/articles/s41... @bas.ac.uk

Change in iceberg calving behavior preceded North Sea ice shelf disintegration during the last deglaciation - Nature Communications

Massive tabular icebergs broke off of the UK during the last ice age. The widespread break-up of the ice shelves which produced these giant icebergs can be traced to around 18,000 years ago, and likel...

nature.com

Paul Bierman@paul-bierman.bsky.social · 2y ago

doi.org/10.5194/tc-1... Recent paper from our international team. 3 million years of ice sheet and climate history from below Greenland's ice in a core from 1966. Free to read. US NSF supported research. 🧪❄️💙📚

Scientific history, sampling approach, and physical characterization of the Camp Century subglacial material, a rare archive from beneath the Greenland Ice Sheet

Abstract. Basal materials in ice cores hold information about paleoclimate conditions, glacial processes, and the timing of past ice-free intervals, all of which aid understanding of ice sheet stabili...

doi.org

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Eric Steig@ericsteig.bsky.social · 2y ago

Important paper in Nature today about collapse of the West Antarctic Ice Sheet. There is a positive isotope anomaly at Skytrain Ice Rise during the last interglacial, consistent with what we found in our high-resolution water-isotope simulations when WAIS collapses. www.nature.com/articles/s41...

The Ronne Ice Shelf survived the last interglacial - Nature

Sea salt data from an ice core record show that Antarctica’s Ronne Ice Shelf survived the last interglacial, the last period of enhanced and sustained global warmth about 125,000 years ago.

nature.com

British Antarctic Survey 🐧@bas.ac.uk · 2y ago

Hello from the Brunt Ice Shelf! ⚡🧪 The RIFT-TIP team are using ice cores and seismology to model how huge fractures travel across ice shelves. With just a few weeks left, they've been putting in a real shift: 🧊 4 ice cores drilled 🔍 60km of radar transects taken ⚡ 64 surface seismometers set up

Four people in bright down jackets pose together on a bright, empty ice shelf. They are holding a long ice core cylinder, which is taller than all of them. Photo: Emma Pearce
Seth Campbell@alpinesciences.bsky.social · 2y ago

Hi friends & colleagues! We have an exciting new position as an Assistant Research Professor at @umaine.bsky.social working with our team on snow, water, and landscape evolution research! Please share this far & wide! fa-ewca-saasfaprod1.fa.ocs.oraclecloud.com/hcmUI/Candid... 🧪

Assistant Research Professor

The University of Maine is a community of more than 11,900 undergraduate and graduate students, and 2,500 employees located on the Orono campus, the regional campus in Machias, and throughout the stat...

fa-ewca-saasfaprod1.fa.ocs.oraclecloud.com