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Gerard McCarthy

@germac.bsky.social
1.3K followers 1.2K following 134 posts

Irish Oceanographer working on Atlantic Overturning & Irish sea level. Husband & Dad. He/him

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Reposted by Gerard McCarthy
Peter Thorne @peterthorne.bsky.social · 03/06/2026
Will you look at that @icarus-maynooth.bsky.social in the talk on the new era6 reanalysis given by Hans Hersbach of @copernicusecmwf.bsky.social
Maynooth University mentioned in a slide of era6 improvements
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Art & Nature @capecodfairytales.bsky.social · 22/05/2026
#Poetry #Painting #MemorialDayWeekend I wish I could see how the ocean is lashing The foam of its billows to whirlwinds of spray; I wish I could see how its proud waves are dashing, And hear the wild roar of their thunder to-day! Anne Brontë (1820 – 1849) 🎨 Ellen Davidson
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Gerard McCarthy @germac.bsky.social · 20/05/2026
Tremendous day in Croke Park on Sunday for Westmeath's 2nd Leinster title.
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Gerard McCarthy @germac.bsky.social · 20/05/2026
1 out of 3 isn't so bad I guess.
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Gerard McCarthy @germac.bsky.social · 13/05/2026
Still on for Saints promoted, Hearts in Scotland, Arsenal in England. Northern Ireland's Shea Charles with the winner in St Marys last night.
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TG4 @tg4.bsky.social · 29/04/2026
"Is éalú deas é ón bhfíorshaol agus ón torann ar fad is dócha" ✨ Sáile 🏊🏼‍♀️ Anocht 🕤 21:30
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Maynooth University @maynoothuniversity.ie · 01/05/2026
📺Watch back: Dr Gerard McCarthy, an oceanographer working in @icarus-maynooth.bsky.social , appeared on the Sáile documentary on @tg4.bsky.social this week. (appears 26:00 to 31:00) www.tg4.ie/en/player/pl...
A man and a woman are having a conversation on a boat. The man is wearing a black jacket with a logo and gesturing with his hands. The woman, wearing a light grey cap and a dark sweater, is listening attentively. They are seated in front of a white life preserver, with a serene lake and green hills in the background. The TG4 logo is displayed in the top right corner.
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Gerard McCarthy @germac.bsky.social · 12/05/2026
What goes up must come down. The AMOC at RAPID 26N in the North Atlantic is a balance of net northward flowing warm, shallow water (Gulf Stream, Ekman/wind, Thermocline) and southward flowing cold, deep water (upper and lower North Atlantic Deep Water). The dashed line is 1:1.
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Gerard McCarthy @germac.bsky.social · 11/05/2026
Bhaineas taitneamh a bheith páirteach san físchlár Sáile ar @tg4.bsky.social coicís ó shin. Tá súil agam go rabhas soiléir go leor ag labhairt faoi fuacht agus teas!
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Gerard McCarthy @germac.bsky.social · 08/05/2026
Really enjoying all the David Attenborough stuff at the moment. I remember being at home in West Cork as a kid watching David Attenborough documentaries* with my parents. In the last few years, I've been watching them with my daughters. Some life and some impact. Happy birthday! *not the same ones!
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Peter Thorne @peterthorne.bsky.social · 05/05/2026
A bit late to the party here but plenty of @icarus-maynooth.bsky.social @maynoothuniversity.ie colleagues doing great things at EGU 2026 this week. In the following a selection of the talks and posters (almost certainly incomplete because the website doesn't allow a search on an institution AFAICT)
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David Stifter 🍵📄🦊 @davidstifter.bsky.social · 23/03/2026
Sakura no hanami (桜の華見) "cherry blossom viewing" on @maynoothuniversity.ie campus.
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Ciara | Ciaraíoch 🎨 @ciaraioch.bsky.social · 11/03/2026
A problem with social media is the paradox of connection, where connections are abundant but ultimately not very deep. In order to know someone well you need to spend time with them often, ideally the old-fashioned way, by turning them into an animal familiar cursed to accompany you for all eternity
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Peter Thorne @peterthorne.bsky.social · 27/02/2026
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
egusphere.copernicus.org
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...
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Marine Ecology Progress Series @meps-ir.bsky.social · 24/02/2026
🦤🌐🧪 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
A person in a yellow waterproof jacket holds a vertical rope densely covered with mussels, suspended over a misty body of water. Multiple mussel-covered ropes hang nearby, indicating a mussel farming operation. The foggy background reveals a distant shoreline, suggesting a coastal aquaculture setting.
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Gerard McCarthy @germac.bsky.social · 20/02/2026
I promise it wasn't I gave it the 1 star review:
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Prof. Stefan Rahmstorf @rahmstorf.bsky.social · 17/02/2026
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?...
youtu.be
Collapse of this Atlantic current could change Europe's climate forever
YouTube video by Channel 4 News
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Gerard McCarthy @germac.bsky.social · 30/01/2026
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...
rte.ie
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...
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ObsSea4Clim @obssea4clim.bsky.social · 04/11/2025
🌊📊 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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The Grand Drawing In @theauldsthretch.bsky.social · 14/12/2025
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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The Grand Drawing In @theauldsthretch.bsky.social · 12/12/2025
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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Ciara | Ciaraíoch 🎨 @ciaraioch.bsky.social · 03/12/2025
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
Collage of prints from my site 


#SpéirGorm #SpéirGhorm #IrelandOne of the handwritten gift notes that I can include for free with all orders, if desired.
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Garry @thegmcconnachie.bsky.social · 09/12/2025
“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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Gerard McCarthy @germac.bsky.social · 28/11/2025
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...
irishexaminer.com
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
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Gerard McCarthy @germac.bsky.social · 28/11/2025
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...
linkedin.com
#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...
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Gerard McCarthy @germac.bsky.social · 27/11/2025
You’ve been kidnapped. The characters from the last TV show you watched are trying to rescue you. Who’s coming to save you?
media.tenor.com
a cartoon character in a green sweater is holding a green monster
ALT: a cartoon character in a green sweater is holding a green monster
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Places of worship @pilgrimsonline.bsky.social · 03/11/2025
🇮🇪 - St Munna's Church, L1618, County Westmeath, Ireland #Ireland #StepByStep 👣 #PlacesOfWorship Want to visit? 🔁 1/6
An image of Taghmon Church from Wikipedia
<a href="https://commons.wikimedia.org/wiki/File:Taghmon_Church-_St._Munnas_Church,_County_Westmeath.JPG">Image</a> licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0" >CC BY-SA 4.0</a? by <a href="//commons.wikimedia.org/w/index.php?title=User:Bridget_Neville&amp;action=edit&amp;redlink=1" class="new" title="User:Bridget Neville (page does not exist)">Bridget Neville</a>An image of Taghmon Church from Wikipedia
<a href="https://commons.wikimedia.org/wiki/File:Taghmon_Church-_St._Munnas_Church,_County_Westmeath.JPG">Image</a> licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0" >CC BY-SA 4.0</a? by <a href="//commons.wikimedia.org/w/index.php?title=User:Bridget_Neville&amp;action=edit&amp;redlink=1" class="new" title="User:Bridget Neville (page does not exist)">Bridget Neville</a>A partially zoomed out map with a pin at the position of St Munna's Church, L1618, County Westmeath, IrelandA zoomed in map showing a pin at the position of St Munna's Church, L1618, County Westmeath, Ireland
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Gerard McCarthy @germac.bsky.social · 03/11/2025
Delira do Becky Ní Éallaithe as ucht Steip 2025 a bhuachaint. About time!
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David @rebelalliance77.bsky.social · 06/10/2025
#Áras25
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Gerard McCarthy @germac.bsky.social · 06/10/2025
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.
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Tomas Buitendijk @tomasbuitendijk.bsky.social · 10/09/2025
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...
rte.ie
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
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Gerard McCarthy @germac.bsky.social · 11/09/2025
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...
rte.ie
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
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Gerard McCarthy @germac.bsky.social · 22/08/2025
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?
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Gerard McCarthy @germac.bsky.social · 11/08/2025
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.
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Ele Willoughby @minouette.bsky.social · 30/07/2025
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

My linocut portrait of Marie Tharp (woman in grey shirt with oversized glasses and red hair in up-do) in front of her physiographic of the Atlantic (in grey on teal) with mid-ocean ridge, resting her cheek on her left hand with elbow on table covered with depth sounder data.
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RTÉ Brainstorm @rtebrainstorm.bsky.social · 18/07/2025
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
rte.ie
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
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Gerard McCarthy @germac.bsky.social · 17/07/2025
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.
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Gerard McCarthy @germac.bsky.social · 17/07/2025
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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RTÉ Brainstorm @rtebrainstorm.bsky.social · 17/07/2025
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...
rte.ie
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
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Gerard McCarthy @germac.bsky.social · 14/07/2025
Lovely summer walks up from the train to the office in Maynooth.
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Gerard McCarthy @germac.bsky.social · 03/07/2025
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
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Gerard McCarthy @germac.bsky.social · 12/06/2025
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-...
jpi-oceans.eu
Shedding light on AMOC: JPI Climate and JPI Oceans launch Assessment Initiative
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Gerard McCarthy @germac.bsky.social · 12/06/2025
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
amocscenarios.org
AMOC Collapse Visualisation Map
The interactive map that shows you the effects worldwide of climate change scenarios and the AMOC current collapsing
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Gerard McCarthy @germac.bsky.social · 28/05/2025
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.
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Gerard McCarthy @germac.bsky.social · 27/05/2025
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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Elvira de Eyto @edeeyto.bsky.social · 26/05/2025
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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Gerard McCarthy @germac.bsky.social · 23/05/2025
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...
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Gerard McCarthy @germac.bsky.social · 23/05/2025
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...
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Gerard McCarthy @germac.bsky.social · 22/04/2025
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...
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Gerard McCarthy @germac.bsky.social · 12/05/2025
The Bealtaine fire is lit and summer welcomed on the Hill of Uisneach
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