Gerard McCarthy
@germac.bsky.social
📤 1321
📥 1099
📝 121
Irish Oceanographer working on Atlantic Overturning & Irish sea level. Husband & Dad. He/him
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Gerard McCarthy
Peter Thorne
1 day ago
First paper led by our
@climatecocentre.bsky.social
PhD student Yongyao has gone to open review. Blown away that after just 12 months she has a first paper submitted.
egusphere.copernicus.org/preprints/20...
@edhawkins.org
@germac.bsky.social
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Atlantic Multidecadal Variability since 1850 is largely externally forced
Abstract. Whether observed Atlantic Multidecadal variability (AMV) is truly an intrinsic internal mode of climate variability or an externally forced response remains contentious, with conflicting lit...
https://egusphere.copernicus.org/preprints/2026/egusphere-2026-699/
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Gerard McCarthy
Marine Ecology Progress Series
4 days ago
🦤🌐🧪 Irish blue mussels have declined over 30 years with changing sea surface temperatures and cold periods affecting health. Reduced tissue weight and higher moisture dominate, while higher local chlorophyll helps mussels thrive.
bit.ly/meps15054
@germac.bsky.social
@samantha-hallam.bsky.social
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I promise it wasn't I gave it the 1 star review:
8 days ago
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Gerard McCarthy
Prof. Stefan Rahmstorf
11 days ago
Great Channel 4 News report on the latest
#AMOC
monitoring. "Trouble is: there is now growing scientific consensus that the AMOC is weakening."
@noc.ac.uk
youtu.be/JpOpsMOBsL4?...
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Collapse of this Atlantic current could change Europe's climate forever
YouTube video by Channel 4 News
https://youtu.be/JpOpsMOBsL4?si=ICb5J5vEyvSnFRH5
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Great, incredibly fast work here from the WasItUs team at ICARUS Maynooth
@clairebergin.bsky.social
and
@lionel-swan.bsky.social
looking at flooding from storm Chandra.
www.rte.ie/news/environ...
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Rainfall accumulation caused Chandra flooding - study
A rapid study of Storm Chandra by climate scientists has found it was the accumulation of rainfall over seven days, including on the day of the storm, rather than the amount of rainfall during the sto...
https://www.rte.ie/news/environment/2026/0129/1555852-climate-change-rainfall-ireland/
29 days ago
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Gerard McCarthy
ObsSea4Clim
4 months ago
🌊📊 Developing reliable
#ocean
#indicators
is essential to guide global action and protect the ocean's future. 🤝 A new study lays the groundwork for a global framework of ocean indicators, connecting
#science
to
#policy
and action. Open access here:
www.sciencedirect.com/science/arti...
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Gerard McCarthy
The Grand Auld Sthretch
3 months ago
Today is 2025-12-14, the sun sets at 16:05:45 and the grand auld stretch tonight was 00 mins and 02 secs. #GrandStretch #TheGrandStretchIsBack
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Gerard McCarthy
The Grand Auld Sthretch
3 months ago
Today is 2025-12-12, the sun sets at 16:05:44 and the grand auld stretch tonight was 00 mins and 1 sec. #GrandStretch #GrandDrawingIn
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Gerard McCarthy
Ciara | Ciaraíoch 🎨
3 months ago
First year selling my art at Christmas without the Other site, where most of my sales came from, as well as losing US orders to new tariffs, so it'll be a tough one - I put huge work into every order, so even if you can't buy, shares help get them in front of eyes. GRMA!
www.ciaraioch.com/artprints
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Gerard McCarthy
Garry
3 months ago
“I am so bored by AI. One of the things I love about the theatre is AI can’t do it.” Ethan Hawke is a dude 👌🏻
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Interesting piece from
@thinkorswim.bsky.social
on AMOC collapse and its potential implications for Ireland. Not sure about the headline but big AMOC change would certainly be transformative for Ireland
www.irishexaminer.com/opinion/comm...
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John Gibbons: A big freeze could turn the Irish into climate refugees
We should reflect on 'get-tough' proposals on immigration: If the Amoc currents that moderate Ireland’s climate fail, temperatures will plunge, making grass-based agriculture impossible
https://www.irishexaminer.com/opinion/commentanalysis/arid-41749716.html
3 months ago
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Meet the Co-Chairs Leading AMOC in Focus Introducing Hans Pörtner and Gerard McCarthy as the Co-Chairs of the newly launched Atlantic Meridional Overturning Circulation (AMOC) Report—AMOC in Focus, a joint assessment by JPI Climate and JPI Oceans.
www.linkedin.com/posts/jpi-oc...
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#cop30 #amoc #climatescience #oceancirculation #jpioceans #jpiclimate | JPI Oceans
Meet the Co-Chairs Leading AMOC in Focus Introducting Hans Pörtner and Gerard McCarthy as the Co-Chairs of the newly launched Atlantic Meridional Overturning Circulation (AMOC) Knowledge Report ini...
https://www.linkedin.com/posts/jpi-oceans_cop30-amoc-climatescience-activity-7396591591752105984-JzPr?utm_source=social_share_send&utm_medium=member_desktop_web&rcm=ACoAABoWoMcB7NwbcqR1gePVBVqK45A5jp1kHxM
3 months ago
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You’ve been kidnapped. The characters from the last TV show you watched are trying to rescue you. Who’s coming to save you?
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3 months ago
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Gerard McCarthy
Places of worship
4 months ago
🇮🇪 - St Munna's Church, L1618, County Westmeath, Ireland
#Ireland
#StepByStep
👣
#PlacesOfWorship
Want to visit? 🔁 1/6
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Delira do Becky Ní Éallaithe as ucht Steip 2025 a bhuachaint. About time!
4 months ago
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Gerard McCarthy
David 🏳️🌈🇮🇪
5 months ago
#Áras25
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I'm reading the Parable of the Talents at the moment and having lots of 'did I read that in the book or in the news?' moments.
5 months ago
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Gerard McCarthy
Tomas Buitendijk
6 months ago
What is going on with the AMOC - the system of ocean currents that gives Ireland its mild and wet climate? With a number of iCRAG colleagues we wrote a short piece for
@rtebrainstorm.bsky.social
➡️
www.rte.ie/brainstorm/2...
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Is the Atlantic ocean's "wobble" a warning for Ireland?
The Atlantic between Ireland and Canada, which gives us our mild climate, is behaving strangely and is the only location on the earth's surface that has cooled
https://www.rte.ie/brainstorm/2025/0910/1532666-atlantic-meridional-overturning-circulation-wobble-ireland-climate/
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Up on RTÉ Brainstorm now, together with colleagues Audrey Morley,
@tomasbuitendijk.bsky.social
, Chris Bean, an article we wrote on the AMOC (gulfstreamsystem, as Joyce would have said) that spans social science, current and past climates and emerging observing:
www.rte.ie/brainstorm/2...
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Is the Atlantic ocean's "wobble" a warning for Ireland?
The Atlantic between Ireland and Canada, which gives us our mild climate, is behaving strangely and is the only location on the earth's surface that has cooled
https://www.rte.ie/brainstorm/2025/0910/1532666-atlantic-meridional-overturning-circulation-wobble-ireland-climate/
6 months ago
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I often come back to the Atlantic being warmer than the Pacific at depth. At shallower depths, it seems obvious that the warm water is coming from the Med. But also the vertical heat transport due to overturning processes needs to be remembered. Anyone know of study partitioning those two processes?
6 months ago
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The butterflies are flying it at the moment. clockwise from top (afaik at least!): red admiral, dragonfly, small tortoiseshell, holly blue (back of wings), grasshopper. From a blackberry picking session on the Old Rail Trail on Saturday.
7 months ago
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Gerard McCarthy
Ele Willoughby
7 months ago
Happy birthday to
#geologist
& oceanographic
#cartographer
Marie Tharp (1920-2006), whose pioneering, thorough & complete ocean floor maps with Bruce Heezen, made using realms of echo sounder data, revealed the Mid-Atlantic Ridge. 🧪🐡👩🏼🔬⚒️
#histsci
After studying
#geology
& math, Maurice ‘Doc’ Ewing
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Gerard McCarthy
RTÉ Brainstorm
8 months ago
Where are the hurling and football strongholds in Ireland? Analysis of the geographical spread of Gaelic games by
@germac.bsky.social
Amelia Carroll & Hannah Shen
@maynoothuniversity.ie
@researchireland.ie
www.rte.ie/brainstorm/2...
#AllIrelandHurlingFinal
#AllIrelandFinal
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Where are the hurling and football strongholds in Ireland?
GAA clubs are found in every corner of Ireland, but you'll find surprising pockets of football clubs in so-called hurling counties and vice-versa
https://www.rte.ie/brainstorm/2025/0717/1460508-gaa-geography-hurling-football-strongholds-clubs-county-titles/
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We've a great line up of MOC talks for this year's IAPSO-IAMAS-IACS conference in Busan, South Korea. I look forward to meeting colleagues and catching up.
8 months ago
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This is an update to the work Hannah and Amelia did last summer. We used the winning senior clubs to determine the hurling areas in Munster (circled by blue below). This year we checked that against the clubs of the squads for the final (black dots) and they matched well.
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8 months ago
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reposted by
Gerard McCarthy
RTÉ Brainstorm
8 months ago
Where are the hurling and football strongholds in Ireland? Analysis of the geographical spread of Gaelic games by
@germac.bsky.social
Amelia Carroll & Hannah Shen
@maynoothuniversity.ie
@researchireland.ie
www.rte.ie/brainstorm/2...
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Where are the hurling and football strongholds in Ireland?
GAA clubs are found in every corner of Ireland, but you'll find surprising pockets of football clubs in so-called hurling counties and vice-versa
https://www.rte.ie/brainstorm/2025/0717/1460508-gaa-geography-hurling-football-strongholds-clubs-county-titles/
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Lovely summer walks up from the train to the office in Maynooth.
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8 months ago
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Loadsa news up on our webpage. Particular welcome to Emma and Hannah who are with us for the summer and Jittrarast, Lionel, and JP who are doing the MSc projects in the group:
icarusoceans.maynoothuniversity.ie?page_id=525
8 months ago
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In a busy day for AMOC news, I'm excited to take on the co-chair of the new JPI Climate and JPI Oceans expert-driven assessment of the latest science on the AMOC:
www.jpi-oceans.eu/en/shedding-...
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Shedding light on AMOC: JPI Climate and JPI Oceans launch Assessment Initiative
https://www.jpi-oceans.eu/en/shedding-light-amoc-jpi-climate-and-jpi-oceans-launch-assessment-initiative
9 months ago
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Really striking new study from van Westen and Baatsen and a class visualisation tool to go with it. This study looks at a future where the AMOC has collapsed. Temperatures hitting -22ºC in Dublin in the winter is pretty stark. Hearing these numbers can be shocking and worrying.
amocscenarios.org
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AMOC Collapse Visualisation Map
The interactive map that shows you the effects worldwide of climate change scenarios and the AMOC current collapsing
https://amocscenarios.org/
9 months ago
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After the Mary Robinson conference in Ballina, it was west to survey an old sea level benchmark for me and Patrick. We got all the weathers but the sun shone for our survey. Croagh Patrick in the background. We are surveying a few points around Ireland to pin down Ireland's sea levels from 1842.
9 months ago
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With the turn in the weather, the marine heatwave seems to have peaked. These data are from the M3 data buoy off southwest Ireland. Source:
eurosea.marine.ie/his
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9 months ago
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Gerard McCarthy
Elvira de Eyto
9 months ago
Surface water temperatures on Lough Feeagh (west coast of Ireland) have been pretty high this year! Daily temperatures in May above the 99th% on most days. 🥵🌡️💦
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Study led by Dr Sam Diabaté: In this paper, we were interested in finding out whether the circulation changes recorded at various moorings on and around the Northwest European Shelf were related to the sea-level variability on the shelf.
kwnsfk27.r.eu-west-1.awstrack.me/L0/https:%2F...
9 months ago
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The marine heatwave off the coast of Ireland is pretty severe at the moment. Temperatures are about 3ºC above normal for this time of the year. Source:
www.marine.ie/site-area/da...
9 months ago
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reposted by
Gerard McCarthy
We published a signal-to-noise analysis of AMOC observations in GRL. TLDR: Direct observations (RAPID) of the AMOC do show a decline in line with climate model projected weakening (~1 Sv/decade) but the noise is still very large in comparison to the signal. Paper:
doi.org/10.1029/2025...
10 months ago
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The Bealtaine fire is lit and summer welcomed on the Hill of Uisneach
10 months ago
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Well after reading this, I'm definitely turning the phone around for selfies. Then I'll be cool (again), right?
www.theguardian.com/society/2025...
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Cringe! How millennials became uncool
They are mocked by gen Z for everything from their trainer socks to their mom jeans and selfie technique. A maligned millennial asks: how did we get here?
https://www.theguardian.com/society/2025/may/08/cringe-how-millennials-became-uncool?utm_source=firefox-newtab-en-gb
10 months ago
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reposted by
Gerard McCarthy
10 months ago
AMOC in density space, heat and freshwater transports, and 2D velocity fields at 26N have been updated to February 2023. They are freely available on our website at
rapid.ac.uk
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An important point of conversation. Also featuring ICARUS Maynooth's Samantha Hallam.
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10 months ago
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I enjoyed talking to
@philipb-h.bsky.social
for this episode. Nice exploration of dire predictions of AMOC collapse (incl. an interview with Peter and Susanne Ditlevsen) and the revisions to Florida Current estimates (featuring Denis Volkov) that associate with less AMOC decline.
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10 months ago
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Handy list!
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10 months ago
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Also should say that that current AMOC trends are unlikely to reach “unfamiliar” (signal‐to‐noise ratio > 2) or “unknown” (signal‐to‐noise ratio > 3) thresholds until the 2040s and 2060s, respectively.
add a skeleton here at some point
10 months ago
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We published a signal-to-noise analysis of AMOC observations in GRL. TLDR: Direct observations (RAPID) of the AMOC do show a decline in line with climate model projected weakening (~1 Sv/decade) but the noise is still very large in comparison to the signal. Paper:
doi.org/10.1029/2025...
10 months ago
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reposted by
Gerard McCarthy
Hannah Daly
12 months ago
🔔 Call for sessions for the Mary Robinson Climate and Nature Conference - applications close on March 21st. I'm delighted and honoured to give a keynote address on the first day of the conference along with an amazing bunch of speakers.
#irelandclimate
www.maryrobinsoncentre.ie/mary-robinso...
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Climate Conference 2025
The highly anticipated Mary Robinson Climate and Nature Conference is set to return in 2025, bringing together global leaders, scientists, activists, and policymakers to address the world’s...
https://www.maryrobinsoncentre.ie/mary-robinson-climate-and-nature-conference-2025.html
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reposted by
Gerard McCarthy
Prof. Stefan Rahmstorf
about 1 year ago
Want to work with us on the AMOC? 🌊 We have a 3-year postdoctoral position to fill. Check it out here:
potsdam.pi-asp.de/bewerber-web...
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The deadline has been extended to 25th February... so not too late to submit!
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about 1 year ago
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Gerard McCarthy
Peter Thorne
about 1 year ago
Delighted to announce that
@edhawkins.org
has been approved for an adjunct Prof position in the ICARUS climate research centre
@maynoothuni.bsky.social
(I really must set up an ICARUS account here ...) which will formalise and strengthen our existing collaborations. Welcome Ed!
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Abstract deadline coming up.. better remember my own!
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about 1 year ago
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Gerard McCarthy
Sang-Ki Lee
about 1 year ago
BACO2025 is IAMAS-IACS-IAPSO Joint Assembly to be held in Busan, South Korea on July/20-25/2025. The MOC symposium in IAPSO (P04) welcomes abstracts on observations, theory, and numerical modelling of the MOC. The abstract deadline is Feb/15/2025 🌊🧪:
baco-25.org/new/sub2/sub...
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Busan IAMAS-IACS-IAPSO Joint Assembly 2025
Busan IAMAS-IACS-IAPSO Joint Assembly 2025, BACO-25
https://baco-25.org/new/sub2/sub202.asp
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