Matt Harris
@mattrpharris.bsky.social
Paleoclimate and ice core scientist @
Earth Sciences New Zealand.
Mostly climate, Antarctica, ice cores.
Recovering spectroscopist.
https://github.com/MRPHarris
Earth Sciences New Zealand.
Mostly climate, Antarctica, ice cores.
Recovering spectroscopist.
https://github.com/MRPHarris
Reposted by Matt Harris
Antarctic ice sheet folk, I'm looking for a Postdoctoral Fellow in Antarctic Ice Sheet Reconstruction [readvertised] for a 3.5yr appointment in Tasmania. Very flexible start date!
Join our new team, figuring out what is happening and what may happen in East Antarctica. 1/4
❄️
Join our new team, figuring out what is happening and what may happen in East Antarctica. 1/4
❄️
February 6, 2026 at 1:18 AM
Antarctic ice sheet folk, I'm looking for a Postdoctoral Fellow in Antarctic Ice Sheet Reconstruction [readvertised] for a 3.5yr appointment in Tasmania. Very flexible start date!
Join our new team, figuring out what is happening and what may happen in East Antarctica. 1/4
❄️
Join our new team, figuring out what is happening and what may happen in East Antarctica. 1/4
❄️
Reposted by Matt Harris
If you're interested in how ice sheets respond to climate, particularly over very long timescales, you might be interested in our new (open access) paper:
www.nature.com/articles/s43...
www.nature.com/articles/s43...
February 3, 2026 at 8:43 AM
If you're interested in how ice sheets respond to climate, particularly over very long timescales, you might be interested in our new (open access) paper:
www.nature.com/articles/s43...
www.nature.com/articles/s43...
Reposted by Matt Harris
Resolving the past history of the Cook Ice Shelf region of East Antarctica
🚢 COOKIES voyage delivers record‑breaking core for RV Investigator
A huge milestone for the RV Investigator COOKIES voyage – the successful recovery of a whopping 20.5‑metre sediment core, now officially the longest core ever retrieved in the vessel’s history.
➡️ antarctic.org.au/cookies-blog...
A huge milestone for the RV Investigator COOKIES voyage – the successful recovery of a whopping 20.5‑metre sediment core, now officially the longest core ever retrieved in the vessel’s history.
➡️ antarctic.org.au/cookies-blog...
COOKIES Blog #5 – The longest story ever pulled from the seafloor on the RV Investigator - ACEAS
Learn about the longest sediment core sample every retrieved by the RV Investigator on the COOKIES voyage, measuring 20.5 metres!!
antarctic.org.au
January 29, 2026 at 10:50 PM
Resolving the past history of the Cook Ice Shelf region of East Antarctica
North-easterly blowing sea ice around off Scott Base, 29/01/26.
January 29, 2026 at 10:14 PM
North-easterly blowing sea ice around off Scott Base, 29/01/26.
Cores of turtle scutes (shells) are not an archive I usually analyse! Nice to go back to my marine science roots 😃
We identify a link between changes in turtle scute growth rates and environmental stressors.
I have also made the code for the changepoint analysis public: github.com/MRPHarris/Tu...
We identify a link between changes in turtle scute growth rates and environmental stressors.
I have also made the code for the changepoint analysis public: github.com/MRPHarris/Tu...
January 29, 2026 at 6:58 PM
Cores of turtle scutes (shells) are not an archive I usually analyse! Nice to go back to my marine science roots 😃
We identify a link between changes in turtle scute growth rates and environmental stressors.
I have also made the code for the changepoint analysis public: github.com/MRPHarris/Tu...
We identify a link between changes in turtle scute growth rates and environmental stressors.
I have also made the code for the changepoint analysis public: github.com/MRPHarris/Tu...
Orcas amidst the sea ice off Scott Base
January 25, 2026 at 7:46 AM
Orcas amidst the sea ice off Scott Base
Reposted by Matt Harris
While Australian heatwaves were some of the very first extreme events attributed to climate change, people still underestimate how much worse they got - killing more people than all other natural hazards combined. New @wwattribution.bsky.social study. www.worldweatherattribution.org/climate-chan...
January 22, 2026 at 1:56 PM
While Australian heatwaves were some of the very first extreme events attributed to climate change, people still underestimate how much worse they got - killing more people than all other natural hazards combined. New @wwattribution.bsky.social study. www.worldweatherattribution.org/climate-chan...
We are looking for a Senior Technician in the Ice Core Facility at Earth Sciences New Zealand, formerly GNS Science.
Permanent position working with a great team at a beautiful site (National Isotope Centre, Lower Hutt).
Job description + more info:
www.gns.cri.nz/careers/
Permanent position working with a great team at a beautiful site (National Isotope Centre, Lower Hutt).
Job description + more info:
www.gns.cri.nz/careers/
January 21, 2026 at 8:30 PM
We are looking for a Senior Technician in the Ice Core Facility at Earth Sciences New Zealand, formerly GNS Science.
Permanent position working with a great team at a beautiful site (National Isotope Centre, Lower Hutt).
Job description + more info:
www.gns.cri.nz/careers/
Permanent position working with a great team at a beautiful site (National Isotope Centre, Lower Hutt).
Job description + more info:
www.gns.cri.nz/careers/
Working with some model outputs that rely on the venerable NCEP/NCAR reanalysis as I write this. The excellence, reach & influence of NCAR is global. Horrified but completely unsurprised by this decision.
NCAR is quite literally our global mothership.
Everyone who works in climate and weather has passed through its doors and benefited from its incredible resources.
Dismantling NCAR is like taking a sledgehammer to the keystone holding up our scientific understanding of the planet.
Unbelievable.
Everyone who works in climate and weather has passed through its doors and benefited from its incredible resources.
Dismantling NCAR is like taking a sledgehammer to the keystone holding up our scientific understanding of the planet.
Unbelievable.
Trump moves to dismantle major US climate research center in Colorado
The Trump administration is breaking up the National Center for Atmospheric Research, taking aim at one of the world's leading climate research labs.
www.usatoday.com
December 17, 2025 at 11:51 PM
Working with some model outputs that rely on the venerable NCEP/NCAR reanalysis as I write this. The excellence, reach & influence of NCAR is global. Horrified but completely unsurprised by this decision.
Reposted by Matt Harris
Timeline cleanse: Antarctic sun dogs/halo version. January 2024, RAICA ice core project at Canisteo Peninsula, West Antarctica supported by Korea Polar Research Institute and US National Science Foundation. 🌞 ❄️
December 10, 2025 at 12:17 AM
Timeline cleanse: Antarctic sun dogs/halo version. January 2024, RAICA ice core project at Canisteo Peninsula, West Antarctica supported by Korea Polar Research Institute and US National Science Foundation. 🌞 ❄️
🧪 Another discrete ice core gas extraction for Kr81 yesterday. Always feels a little nerve-wracking melting ~1.5 kg of core (>750 m deep in this case, from Roosevelt Island)...
December 1, 2025 at 10:51 PM
🧪 Another discrete ice core gas extraction for Kr81 yesterday. Always feels a little nerve-wracking melting ~1.5 kg of core (>750 m deep in this case, from Roosevelt Island)...
Reposted by Matt Harris
This is the second part of the work we covered here, highlighting that CO2 is the dominant forcer in temperature and sea level changes during ice age cycles.
(It's also a great chance for others to cover; this has not been widely reported. There's even an old ice core now that can test this!)
(It's also a great chance for others to cover; this has not been widely reported. There's even an old ice core now that can test this!)
October 23, 2025 at 4:55 PM
This is the second part of the work we covered here, highlighting that CO2 is the dominant forcer in temperature and sea level changes during ice age cycles.
(It's also a great chance for others to cover; this has not been widely reported. There's even an old ice core now that can test this!)
(It's also a great chance for others to cover; this has not been widely reported. There's even an old ice core now that can test this!)
Reposted by Matt Harris
🧪🧵 Future change to #ThwaitesGlacier, Antarctica constitutes the largest uncertainty in #sea-level rise forecasts. The Science Coordination Office of the International Thwaites Glacier Collaboration recently issued a briefing document summarising some key findings - thwaitesglacier.org/findings
October 26, 2025 at 9:35 PM
🧪🧵 Future change to #ThwaitesGlacier, Antarctica constitutes the largest uncertainty in #sea-level rise forecasts. The Science Coordination Office of the International Thwaites Glacier Collaboration recently issued a briefing document summarising some key findings - thwaitesglacier.org/findings
Nice to see this paper led by A/Prof John Tibby (Uni of Adelaide) out this past fortnight. The argument for ENSO-driven mid-to-late Holocene drying in eastern Australia is perhaps less convincing than originally thought.
@ausquaternary.bsky.social 🧪
doi.org/10.1002/jqs....
@ausquaternary.bsky.social 🧪
doi.org/10.1002/jqs....
Mid‐Holocene drying of K'gari lakes (subtropical eastern Australia) necessitates re‐evaluation of the El Niño–Southern Oscillation climate links and future drying risk
The Holocene history of Australia's climate is surprisingly poorly understood. This is, in part, because of the relatively weak forcing of Holocene climate versus that of the late Pleistocene. Howeve....
doi.org
October 16, 2025 at 4:19 AM
Nice to see this paper led by A/Prof John Tibby (Uni of Adelaide) out this past fortnight. The argument for ENSO-driven mid-to-late Holocene drying in eastern Australia is perhaps less convincing than originally thought.
@ausquaternary.bsky.social 🧪
doi.org/10.1002/jqs....
@ausquaternary.bsky.social 🧪
doi.org/10.1002/jqs....
Reposted by Matt Harris
UGH! When will it end. 😭
"Effective October 15, 2025, due to non-renewed funding, NSIDC has suspended or reduced several Sea Ice Today tools and services."
nsidc.org/data/user-re...
"Effective October 15, 2025, due to non-renewed funding, NSIDC has suspended or reduced several Sea Ice Today tools and services."
nsidc.org/data/user-re...
October 15, 2025 at 6:54 PM
UGH! When will it end. 😭
"Effective October 15, 2025, due to non-renewed funding, NSIDC has suspended or reduced several Sea Ice Today tools and services."
nsidc.org/data/user-re...
"Effective October 15, 2025, due to non-renewed funding, NSIDC has suspended or reduced several Sea Ice Today tools and services."
nsidc.org/data/user-re...
Reposted by Matt Harris
Updated with new expert comments overnight:
Big shakeup for NZ’s research funding – Expert Reaction
Big shakeup for NZ's research funding - Expert Reaction - Science Media Centre
The Government will consolidate decision-making for New Zealand's science research funding as part of its new science system strategy. Research Funding New Zealand will be a new independent board that...
www.sciencemediacentre.co.nz
October 14, 2025 at 10:16 PM
Updated with new expert comments overnight:
Reposted by Matt Harris
NSF: The vessel [US Antarctic research vessel NB Palmer] is planned to be returned to the operator after a final cruise in October 2025.
www.nsf.gov/geo/opp/upda... @carlosmoffat.com
www.nsf.gov/geo/opp/upda... @carlosmoffat.com
Update on Nathaniel B. Palmer
www.nsf.gov
September 11, 2025 at 3:11 PM
NSF: The vessel [US Antarctic research vessel NB Palmer] is planned to be returned to the operator after a final cruise in October 2025.
www.nsf.gov/geo/opp/upda... @carlosmoffat.com
www.nsf.gov/geo/opp/upda... @carlosmoffat.com
Reposted by Matt Harris
"evidence is emerging for rapid, interacting and sometimes self-perpetuating changes in the Antarctic environment"
New review out today led by @climatenerilie.bsky.social brings together the rapid changes unfolding in the Antarctic. It's powerful, and sobering, reading.
New review out today led by @climatenerilie.bsky.social brings together the rapid changes unfolding in the Antarctic. It's powerful, and sobering, reading.
Emerging evidence of abrupt changes in the Antarctic environment - Nature
Abrupt changes are developing across Antarctica’s ice, ocean and biological systems; some of these changes are intensifying faster than equivalent Arctic changes, potentially irreversibly, and their i...
www.nature.com
August 20, 2025 at 11:41 PM
"evidence is emerging for rapid, interacting and sometimes self-perpetuating changes in the Antarctic environment"
New review out today led by @climatenerilie.bsky.social brings together the rapid changes unfolding in the Antarctic. It's powerful, and sobering, reading.
New review out today led by @climatenerilie.bsky.social brings together the rapid changes unfolding in the Antarctic. It's powerful, and sobering, reading.
Reposted by Matt Harris
I am not sure how many people realize the huge array of field affected by these cut to science agencies. For example, the NSF quietly stopped hosting the public available USAP photo library last month, a resource of thousands of historic United States Antarctic photos dating to the 1940s. #histsci
This is profoundly bad. The data generated by NASA feeds research in many, MANY disciplines. I, for instance, am a historian, and my dissertation (now book project) uses satellite imagery as a major source for exploring the historical relationship between people and the environment.
NASA’s acting chief calls for the end of Earth science at the space agency arstechnica.com/space/2025/0...
August 17, 2025 at 11:00 PM
I am not sure how many people realize the huge array of field affected by these cut to science agencies. For example, the NSF quietly stopped hosting the public available USAP photo library last month, a resource of thousands of historic United States Antarctic photos dating to the 1940s. #histsci
It's not uncommon to look across the bay and see Wellington getting drenched.
Photo from Monday:
Photo from Monday:
August 14, 2025 at 2:44 AM
It's not uncommon to look across the bay and see Wellington getting drenched.
Photo from Monday:
Photo from Monday:
Reposted by Matt Harris
Get your tickey here for a virtual journey ✈️ to #Antarctica with @bas.ac.uk ! Perfect for kids and adults alike ❄️🥼🧪🇦🇶
Sign up➡️ tickettoantarctica.com
Sign up➡️ tickettoantarctica.com
August 13, 2025 at 2:26 PM
Get your tickey here for a virtual journey ✈️ to #Antarctica with @bas.ac.uk ! Perfect for kids and adults alike ❄️🥼🧪🇦🇶
Sign up➡️ tickettoantarctica.com
Sign up➡️ tickettoantarctica.com
Reposted by Matt Harris
We’ve collected the oldest ice core, now it’s time to analyse it! 🔍 💻
The @newscientist.com have a new icy-cool video, speaking to BAS scientists about the Beyond EPICA project, highlighting why this work is so important in the face of climate change.
www.newscientist.com/video/249042...
The @newscientist.com have a new icy-cool video, speaking to BAS scientists about the Beyond EPICA project, highlighting why this work is so important in the face of climate change.
www.newscientist.com/video/249042...
August 12, 2025 at 10:07 AM
We’ve collected the oldest ice core, now it’s time to analyse it! 🔍 💻
The @newscientist.com have a new icy-cool video, speaking to BAS scientists about the Beyond EPICA project, highlighting why this work is so important in the face of climate change.
www.newscientist.com/video/249042...
The @newscientist.com have a new icy-cool video, speaking to BAS scientists about the Beyond EPICA project, highlighting why this work is so important in the face of climate change.
www.newscientist.com/video/249042...