Stephen Roberts

Photo of Lake Tilicio in Nepal with an inset core showing our team collecting sediment cores from the lake

Applications are now open for this years’ BAS Iapetus PhD projects … including one working on our Big Thaw project investigating extreme precipitation in Nepal from sediment core and climate data - more details in this link @iapetusdtp.bsky.social @bas.ac.uk

iapetus.ac.uk/studentships...

Collab of @stever60.bsky.social @bas.ac.uk @uniheidelberg.bsky.social #geography

Gravel layer in humic coastal dune.

After a solid week of lake coring and sampling for #storm and #tsunami deposits on the #Shetland Islands, we found this yet undocumented gem 💎 on northern Mainland - a distinct gravel layer inside the coastal dunes. Hoping for good OSL results 🤞🏽

Indeed, Loch Flugarth #ShetlandIslands is a beauty on the inside AND the outside! @stever60.bsky.social @uniheidelberg.bsky.social

Lake coring in the Shetland Islands last week, looking for ancient tsunamis with @drmaex.bsky.social @uniheidelberg.bsky.social @bas.ac.uk

This is Fan Lake on Annenkov Island nr South Georgia - sediments from the top of the lake record were analysed with sediments from >400 lakes around the world to construct a new global temperature calibration model which can be used to reconstruct past changes in temperature over thousands of years

Development of new global lake brGDGT-temperature calibrations: advances, applications, challenges, and recommendations Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are a group of temperature-sensitive membrane lipids found in bacteria that have been widely …

See this link for more details

www.sciencedirect.com/science/arti...

Map showing the location of over 400 lake sediment samples used in this new study

Surface sediments from 400 lakes were analysed for biomarker compounds called branched glycerol dialkyl glycerol tetraethers (brGDGTs), a group of temperature-sensitive bacteria membrane lipids used in past temperature reconstructions - we expand calibration datasets, and evaluate calibration models

A map of the world showing the locations of over 400 lakes whose surface sediments were analysed for biomarker compounds called branched glycerol dialkyl glycerol tetraethers (brGDGTs) are a group of temperature-sensitive membrane lipids found in bacteria that have been widely used in palaeo-temperature reconstruction. The paper expands existing calibration datasets, and evaluates calibration models constructed using a range of statistical modelling approaches

A slide showing Fan Lake on Annenkov Island near South Georgia - sediments from the surface of a core taken from the bottom of the lake were analysed along with sediments from over 400 lakes around the world the construct a new global calibration model which can be used to reconstruct past changes in lake sediments over thousands of years

New exciting new global lake sediment temperature calibration paper and dataset by @geochemem.bsky.social, including the first 5- and 6-methyl brGDGTs measured in lake sediments from Antarctica - eg Fan Lake. See link for details:
doi.org/10.1016/j.qu...

@bas.ac.uk @iapetusdtp.bsky.social

Coring on Loch Flugarth north mainland Shetland - photo taken by Susie who lives in the house on the far right of this view of the loch looking at hills in the distance with a white houses

3 people in a small red boat on Loch Flugarth

View of Loch Flugarth from a large boulder with a rope tied to it towards some hills in the distance

A picture of the farm cat who lives near to Loch Flugarth

Second Scottish lake coring adventure of the summer … this time up to the Shetland Islands looking for ancient storms and tsunamis in lake sediments with @drmaex.bsky.social

the underside of a humpback whale chin sticking out of the ocean. It is covered in barnacles

My whale photo got shortlisted in the Royal Society of Biology @rsb.org.uk ‬ Photographer of the Year competition. It is of a whale's chin! Do me a favour and give it a vote here and check out the other amazing photos: www.surveymonkey.com/r/T23CPZC
@bas.ac.uk

Tom Bradwell helping out on the boat

Morning tea at SCENE with Colin Adams, Iain Geldard, Jodie Geldard, Eileen Tisdall, and Tom Bradwell sat around a table in the common area

Colin Adams and Tom Bradwell inflating the raft on the beach at SCENE

Ellen Tisdall carrying a core back to shore along the boat jetty at the end of days’ coring

And a big thanks to our ‘special guest stars’ Tom Bradwell and Eileen Tisdall from University of Stirling and Nicola Dakin from @bgs.ac.uk for all their help

SCENE University of Glasgow research centre where we were based - photo shows the road leading up to the wooden building through the forest

Collection of sediment cores taken from Loch Lomond over the last 2 weeks strapped into the van for transport to BAS and Southampton for analysis as part of Jodie Geldard’s Iapetus DTP PhD with University of Stirling

Final day lunch at the oldest pub in Scotland, the Clachan with Colin Adams, Iain Geldard, Tom Bradwell, and Jodie Geldard (not in photo)

Selfie With Tom Bradwell outside the sign for the Clachan in Drymen, the oldest pub in Scotland (apparently)

A huge thanks to everyone at @sceneuog.bsky.social for hosting us - in particular Prof. Colin Adams for his phenomenal support, & Iain Geldard - we couldn’t have done it without both of you! Jodie Geldard did an amazing job organising the whole trip as part of her @iapetusdtp.bsky.social PhD

Not everyday was like this but we had a couple of flat calm hot and sunny days out on the lake with stunning views across to Ben Lomond and surrounding mountains … which was very nice @iapetusdtp.bsky.social @bas.ac.uk

Loch Lomond at sunset with coring rig moored in sheltered bay at SCENE university of Glasgow research centre

Loch Lomond view from the southern basin across to Ben Lomond

Collecting cores in the middle of Loch Lomond - 4 people capping a surface core retrieved for potential fish eDNA analysis

Early morning calm on Loch Lomond

Some pictures from the last couple of weeks lake sediment coring on Loch Lomond with @iapetusdtp.bsky.social

That's all for Loch Lomond coring: 12 cores collected in 10 days, 2 gravel layers reached and lots of very fine grey clay in between! @iapetusdtp.bsky.social @bas.ac.uk

Orange ring sculpture

Spiky orb in Clearwell Caves

Sculpture of Red sunglasses in the foreground and orange high heeled shoes out of focus in the background

Sculpture of people holding hands in the shape of ladder

Amazing sculpture exhibition Clearwell Caves in the Wye Valley

Iapetus news, May 2025 The latest news from Iapetus DTP

We have just sent out the latest of Iapetus DTP's periodic newsletters. If it fell foul of your institution’s junk filter, read it here: eocampaign1.com/web-version?...

Edinburgh scenes, day and night

Edinburgh looking fine on the first day of the Iapetus student conference 2025, funded by @ukri.org.

Picture of my foot on Platform 4 Zone 5 at Peterborough station

Picture of the inside of the empty quiet carriage on the LNER train to Edinburgh

Early start … on my way to Edinburgh for the @iapetusdtp.bsky.social annual conference

@iapetusdtp.bsky.social

A list of 5 REP research experience placements available for this summer

A picture of the thermosphere showing the F-region around the Earth

Iapetus Research experience placement (REP) projects are available for summer 2025 including one based @bas.ac.uk investigating the
Effects of Climate Change on the Polar Ionospheric F-region - see link for more details and eligibility criteria; deadline 12 pm 16/5/25

iapetus2.ac.uk/rep-projects/

Congratulations to all the editors for bringing everyone together and producing such a beautiful book, just in time for #Earthday - a big thanks to @oceanandice.bsky.social for keeping us all on track - really enjoyed being part of this!

Why is Antarctica so important?

Antarctica might feel very remote - until you look at the planet from a different perspective. It's actually central to our world's ocean currents.

🎁 Check the alt text to dig into this diagram

🌊 This is from a new book by BAS' @oceanandice.bsky.social (et al.)

Some reviews … “This remarkable volume reviews everything Antarctic, in a stunning sweep encompassing geophysical history, climate, ice sheets, sea ice, ecology, politics, pollution, and more … a ‘must-have’ book”.
Susan Solomon, 1999 National Medal of Science Laureate

Pollution in Antarctica | 8 | Antarctica and the Earth System | Stephe This chapter examines the historical legacy of human activities in and around Antarctica and assesses pollutants from the mid-late 20th century onwards that

www.taylorfrancis.com/chapters/oa-...

Antarctica’s global impact highlighted in new book - British Antarctic Survey This Earth Day the British Antarctic Survey (BAS) is spotlighting a new book that showcases the latest insights from the Antarctic.

New book out for Earth Day - includes a chapter on Pollution in Antarctica … link to open access version in next post

www.bas.ac.uk/media-post/a...

REP Scheme Summer Research Experience placements for current undergraduate students.Applications for 2025 are now open. Please see our list of projects and How to Apply, below, to start your application. Ov...

Undergraduates: fancy a 6-8 wk paid placement in environmental sciences at an Iapetus institution? Check out NERC's REP scheme to support placements for those from groups underrepresented in this area
More info: iapetus2.ac.uk/new-rep-sche...
Deadline: noon 16/05/2025

#minoritiesinstem #environment

Properly mind-blowing event yesterday east of Annapurna II (NE face visible here, 7,937 m, Nepal)! 😱

Probably triggered by ice (+rock?) avalanche at high elev., given the reach and the absence of snow at the moment 🧊

The extent of the aerosol is... HUGE! ❄️🌪️

Source www.tiktok.com/@lakpasherpi...

It’s 9am TFT time here, and citizens are already gathering to protest Tariffs by the United States. Our plain clothes Officer Penguins are attempting to maintain calm, but unfortunately we keep losing them in the crowd.