Prof Ian Hall

Prof Ian Hall

@ianhall.bsky.social

🌍 Climate Scientist & Palaeoclimatologist | Marine Geologist | Professor @ Cardiff University | Ageing marathon runner | #FirstGen | He/Him | 🏴󠁧󠁢󠁷󠁬󠁳󠁿 🇪🇺 The climate has changed before. Earth’s past can tell us a lot about what happens next.

5.1K followers867 following3.3K posts

Prof Ian Hall
@ianhall.bsky.social

🌊 Ocean carbon sequestration during glacial climates due to combined Antarctic sea ice expansion and ocean circulation change www.science.org/doi/10.1126/...

science.orgOcean carbon sequestration during glacial climates due to combined Antarctic sea ice expansion and ocean circulation changeGlacial-interglacial transitions punctuate Earth’s Quaternary climate, accompanied by substantial atmospheric carbon dioxide and ocean carbon storage changes. The cause of atmospheric carbon drawdown ...
Prof Ian Hall
@ianhall.bsky.social

🌊 Protecting the deep ocean under mining threat by connecting existing reserves ...or we could just not mine in the deep ocean www.nature.com/articles/s41...

nature.comProtecting the deep ocean under mining threat by connecting existing reserves - Nature Ecology & EvolutionModelling larval dispersal pathways reveals that protected deep-sea areas lack sufficient connectivity to replenish one another. The addition of strategically placed protected corridors linking the ex...
Prof Ian Hall
@ianhall.bsky.social

During the last Ice Age, a vast ice shelf helped hold back the Greenland and neighbouring ice sheets. When it collapsed, rapid retreat followed. Sound familiar? 👀

nature.comThe Baffin Bay Ice Shelf stabilized three adjacent ice sheets during the last glacial period - Nature GeoscienceAn enormous ice shelf spanned Baffin Bay during the last glacial period, and its rapid retreat during the last deglaciation probably destabilized the surrounding ice sheets, according to an analysis o...
Prof Ian Hall
@ianhall.bsky.social

🌊 Ocean acidification, reduced silicate availability and declines in Ocean productivity The problem: Diatoms need silicon. Silicon recycling may be disrupted by ocean acidification. The implications for marine food webs and carbon cycling deserve attention. www.nature.com/articles/s41...

nature.comOcean acidification, reduced silicate availability and declines in Ocean productivity - Nature CommunicationsLong-term CO2-generated declines in ocean pH block recycling of silicon, an essential nutrient for diatom-driven ocean production. Associated reductions in chlorophyll and plankton-feeding fish reveal...
Prof Ian Hall
@ianhall.bsky.social

The Amazon is shifting from carbon sink to carbon source. 15 yrs of CO2 data show that fires are the dominant carbon source and now outpace forest uptake. Deforestation is driving the damage, amplified by drought and El Niño. Protecting forests is climate action. www.nature.com/articles/s41...

nature.comAmazon carbon emissions driven by human actions amplified by droughts - NatureFifteen years of atmospheric CO2 measurements show that the Amazon carbon sink is weakening, with fires, deforestation and climate stress driving increasingly high carbon emissions.
Prof Ian Hall
@ianhall.bsky.social

Climate change has stopped the next Ice Age For thousands of years, Earth’s orbital cycles favoured cooler northern summers, the kind of conditions that help ice sheets grow. Then GHG emissions changed the balance reversing ~2,000 years of ice-sheet expansion. www.science.org/doi/10.1126/...

science.orgLate Holocene reexpansion of the Laurentide Ice SheetDuring interglaciations, the Laurentide Ice Sheet (LIS), which is the largest of the Pleistocene ice sheets, retreats to Arctic Canada, where it achieves a minimum configuration. The reexpansion of th...

Prof Ian Hall reposted

Katherine Allen
@paleobluedot.bsky.social

✨ New paper ✨ on subsurface ocean warming in both N and S hemispheres during the early deglaciation! 🌊 I am incredibly proud of this work, which is led by my former graduate student, Cassie Stirpe. www.nature.com/articles/s43...

nature.comSynchronous subsurface ocean warming in western boundary regions of both hemispheres during Heinrich Stadial 1 - Communications Earth & EnvironmentIntermediate waters in the southwestern Pacific Ocean warmed simultaneously with upper ocean waters in the Atlantic during Heinrich Stadial 1, possibly due to a southward shift of the Southern Hemisph...
Prof Ian Hall
@ianhall.bsky.social

If expensive gas was behind nearly 90% of the rise in UK electricity bills, perhaps the question isn’t whether we can afford the energy transition. It’s how much longer we can afford to remain so dependent on gas. Now there's a thought... www.carbonbrief.org/revealed-exp...

carbonbrief.orgRevealed: Expensive gas behind ‘nearly 90%’ of rise in UK electricity bills - Carbon BriefA surge in wholesale costs driven by expensive gas is responsible for nearly 90% of the rise in UK household…
Prof Ian Hall
@ianhall.bsky.social

What if Antarctica can tip before reaching its currently expected tipping point? New research suggests delayed bedrock uplift could trigger self-sustaining ice retreat in the Recovery and Aurora basins, with potentially 9–11 m of sea-level rise. www.nature.com/articles/s41...

nature.comAntarctic marine-based ice destabilized when warming outpaces solid-Earth feedbacks - Nature GeoscienceDelayed bedrock uplift can allow rapid warming to trigger Antarctic Ice Sheet retreat before classical instability thresholds are reached, lowering critical warming thresholds by up to 0.5 K in East A...
Prof Ian Hall
@ianhall.bsky.social

El Niño is threatening California’s fragile coast again – the 1982‑83 El Niño opened eyes to the serious erosion risks Developed coastal areas can do little to lessen El Niño’s impacts now, but they can prepare to manage the risks and adapt to a changing future. theconversation.com/el-nino-is-t...

theconversation.comEl Niño is threatening California’s fragile coast again – the 1982-83 El Niño opened eyes to the serious erosion risksThe destructive 1982-83 El Niño, then the strongest on record, eroded cliffs, leaving homes hanging precariously over the edges. A coastal scientist explains the escalating risks.
Prof Ian Hall
@ianhall.bsky.social

Again, this doesn’t mean +2.8°C everywhere. Land warms faster than ocean; the Arctic much faster than the global mean. Some regions will see far greater shifts than others. One global number....with radically different local realities. www.independent.co.uk/climate-chan...

independent.co.ukGlobal warming could hit 2.8C by the end of the century, UN scientists sayThe United Nations on Wednesday released its annual ‘Emissions Gap’ report, detailing multiple 1.5C overshoot scenarios

Prof Ian Hall reposted

Rob Larter
@polarrobs.bsky.social

🧵 So, UK government has approved extraction from the Jackdaw gas field in the North Sea. Advocates for this have claimed that gas produced in the North Sea emits “four times” less CO₂ than imported liquified natural gas (LNG).

Prof Ian Hall
@ianhall.bsky.social

Giant ‘heat storms’ are scorching the Earth. This is the story of the biggest one on record. Really good article, but I’m not sure about “heat storms” as a term. We already have ways to describe extreme heat events. www.reuters.com/investigates...

reuters.comGiant ‘heat storms’ are scorching Earth. The story of the biggest one.Supersized heat waves used to be rare. No longer. Reuters reveals the rise of ‘heat storms.’ They now swarm the globe, upending life and the climate everywhere.
Prof Ian Hall
@ianhall.bsky.social

Tap water no longer drinkable in Norwegian town as climate-related permafrost thawing releases heavy metals. Longyearbyen, 800 miles from the north pole, is warming at x5 to x7 times the world’s average rate, with autumn temperatures rising at up to 4C a decade. www.theguardian.com/environment/...

theguardian.comTap water no longer drinkable in Norwegian town as climate-related thawing releases heavy metalsWarning for other Arctic communities as residents told not to use water in Longyearbyen in Svalbard, one of the fastest-warming places in the world
Prof Ian Hall
@ianhall.bsky.social

It should be simple: 👉 Warm Homes Plan: projected £1bn annual bill savings, 50,000 jobs. 👉 Rosebank: around 1,100 jobs. Insulate homes. Cut bills. Create jobs. Reduce fossil fuel dependence. Why not invest in warmth, not more oil? www.theguardian.com/environment/...

theguardian.comHeat pumps and insulation would cut UK living costs more than new oilfields, study suggestsWarm homes plan would create 50,000 jobs, compared with about 1,100 for Rosebank oilfield, thinktank finds
Prof Ian Hall
@ianhall.bsky.social

🌊 Looking for some good news... ‘Incredible’: bleached corals thrive within days when touching healthy neighbour. A coral fragment can form a tissue bridge with a dying counterpart — and provide it with crucial microalgae. www.nature.com/articles/d41...

nature.com‘Incredible’: bleached corals thrive within days when touching healthy neighbourA coral fragment can form a tissue bridge with a dying counterpart — and provide it with crucial microalgae.