In episode 5 of the Raised Beaches Podcast, I highlighted five papers. These cover the subjects of determining past sea level position from beach ridges, Holocene sea level, an orbital theory of interglacials, and two paleo sea level compilations. Links to the papers are in this thread!
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#Oceans last year reached their highest levels in three decades — with the global #SeaLevel rate rising higher than expected, according to a NASA-led analysis published Thursday. The unexpected rise in global levels is alarming, particularly for regional impacts around coastal cities, many of which are already experiencing more damaging #flooding.
#ClimateChange #ClimateCrisis #climate
https://www.washingtonpost.com/climate-environment/2025/03/14/sea-level-rise-unexpected-increase-2024-nasa/
The Washington Post · Global sea level rose higher than expected last year. Here’s why.
I have released episode 5 of the Raised Beaches Podcast, a podcast about paleoclimate, Earth science and global change! This episode's deep dive is on the greenhouse effect. Get it in the following link or wherever you get your podcasts.
In the intro, I talk about going to watch Sakurajima Volcano erupt, an earthquake I felt in January, my efforts to download data from NOAA and how US government agencies are being shut down, and a commentary on DEI.
I discuss in the deep dive how the greenhouse effect works, and why greenhouse gases are needed to keep the planet inhabitable. In the second part I discuss the history of the discovery of the greenhouse effect and how it got its name, and the greenhouse effect on Venus and Mars.
Finally, I discuss in the papers section a recent paper I am coauthor on, led by Alessio Rovere, about determining past sea level position from a beach ridge in Argentina. I discuss 4 other papers.
#Paleoclimate #ClimateChange #Podcast #SeaLevel #NOAA #Volcano
https://raisedbeaches.buzzsprout.com/2401751/episodes/16758479-episode-5-the-greenhouse-effect
Glacial Melting Is Accelerating, Driving Sea Level Rise and Depleting Freshwater: Study https://www.ecowatch.com/glaciers-melting-sea-level-rise-freshwater-depletion.html
EcoWatch · Glacial Melting Is Accelerating, Driving Sea Level Rise and Depleting Freshwater: Study
Large-scale loss of Mediterranean coastal marshes under rising sea levels by 2100 https://www.nature.com/articles/s43247-025-02099-2
#Mediterranean #coastal #wetlands account for important biodiversity and ecosystem services. But climate-change induced #sealevel rise poses a critical risk to their survival. Here, we assess these risks for Mediterranean coastal marshes, one key type of Mediterranean coastal wetlands, and identify main drivers for future coastal marsh change for the Mediterranean and comparable coastlines. We apply an integrated modelling approach that accounts for future sea-level rise, sediment accretion, coastal management and marsh inland migration processes. Depending on climate mitigation scenarios, widespread coastal marsh loss is projected, ranging from 8% to 92% of current extents. For Egypt, France, and Algeria, we predict (near) total loss of coastal marshes by 2100 for current coastal management and sediment supply scenarios. Overall, losses could at least be halved if additional inland migration space were created, e.g. through passive or active habitat restoration. Bold climate mitigation and local adaptation are needed to preserve existing coastal marshes.
Greg Cocks Glacier Melt Intensifying Freshwater Loss And Accelerating Sea-Level Rise
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https://www.esa.int/Applications/Observing_the_Earth/FutureEO/CryoSat/Glacier_melt_intensifying_freshwater_loss_and_accelerating_sea-level_rise <-- shared technical article
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https://doi.org/10.1038/s41586-024-08545-z <-- shared paper
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#GIS #spatial #mapping #GlacierMassBalanceIntercomparison #glacial #glacier #global #cryosphere #regional #freshwater #water #resources #waterresources #watersecurity #sealevel #sealevelrise #SLR #rate #change #spatialanalysis #spatiotemporal #ice #snow #loss #massloss #greenland #antarctic #icesheet #anthropogenic #climatechange #melt #melting #risk #hazard #geohazard #geology #engineeringgeology #marine #terrestrial #ecosystems #watercycle #masschange #insitu #remotesensing #local #observation #model #modeling #projection
‘Ironic’: climate-driven sea level rise will overwhelm major oil ports, study shows https://www.theguardian.com/environment/2025/jan/04/climate-driven-sea-level-rise-set-to-flood-major-oil-ports #Oilandgascompanies #Energyindustry #Climatecrisis #Fossilfuels #Environment #Worldnews #Sealevel #Business #Oil #Oil
The Guardian · ‘Ironic’: climate-driven sea level rise will overwhelm major oil ports, study shows
Weatherwatch: The need to wake up to sea level rise in the UK https://www.theguardian.com/environment/2025/jan/03/weatherwatch-sea-level-rise-uk-climate #Climatecrisis #Environment #UKweather #Sealevel #UKnews #Oceans
The Guardian · Weatherwatch: The need to wake up to sea level rise in the UK
Kemp et al investigate the Late Holocene sea level changes in Boston, USA. They find there has been about 4 m of sea level rise in the past 4000 years as a result of land subsidence due to glacial isostatic adjustment. #SeaLevel #SeaLevelChange #GlacialIsostaticAdjustment https://www.sciencedirect.com/science/article/pii/S0277379124005559
https://www.reuters.com/investigates/special-report/climate-change-glacier-volcanoes/
Cool webstory by Reuters about future Iceland's and global volcanic eruptions to be triggered by retreating glaciers, when the weight of the ice is no longer keeping a lid on magma chambers.
Apart from neat writing, it's with video, lotsa photos, animated charts and everything one can think of to be included in #scicomm
tldr: yes, volcanic eruptions will increase with the retreat of glaciers. #Antarctica's volcanos too. #Earthquake activity has already been picking up in Iceland since 2021, also elsewhere in the #Arctic near glaciers, and around the globe.
It has happened before when Earth crawled out of the last #iceage into the #Holocene.
I might add: it happened not only at volcanos near glaciers. Rising #sealevel has triggered near-coastal volcanos, too, whether above or below the water. IIRC, a study on Stromboli proved it.
I personally think, #HungaTonga's eruption could have been one of the first submarine volcanos to have been triggered by #climateChange Another submarine volcano erupted near Japan in 2021 or 2022, forgot its name, starts with an O...
Not as huge an explosion like Hunga Tonga tho.
I am pleased to announce that my new podcast on paleoclimate, Earth Science and global change, the Raised Beaches Podcast, will launch tomorrow (Friday 6th) at 11 AM Japan time (2 AM UTC)! Please stay tuned for the official launch! #Paleoclimate #ClimateChange #SeaLevel #Climate #Podcast https://raisedbeaches.buzzsprout.com/
Brilliant piece on #SeaLevel in the New Yorker from @brookejarvis
https://www.newyorker.com/magazine/2024/08/26/our-very-strange-search-for-sea-level
Ht @meetar
Thwaites Glacier won’t collapse like dominoes as feared, study finds, but that doesn’t mean the ‘Doomsday Glacier’ is stable
https://theconversation.com/thwaites-glacier-wont-collapse-like-dominoes-as-feared-study-finds-but-that-doesnt-mean-the-doomsday-glacier-is-stable-236480 via @TheConversationClimate
#Antarctica #Ice #SeaLevel #Thwaites #DoomsdayGlacier #AntarcticIceSheet #WAIS 
The ConversationThwaites Glacier won’t collapse like dominoes as feared, study finds, but that doesn’t mean the ‘Doomsday Glacier’ is stableAntarctica’s riskiest glacier is a disaster in slow motion, a polar scientist writes. But in a rare bit of good news, the worst-case scenario may be off the table.
If you are interested in the idea of reconstructing past sea level using beach ridges, have a look at our new #preprint, led by Alessio Rovere, where we attempt to find the indicative meaning of these landforms, with reference to a site in Patagonia, Argentina. It has photographic proof that I, the modeller, sometimes go out into the field. ;) #SeaLevel #Paleoclimate #geomorphology https://eartharxiv.org/repository/view/7534/
eartharxiv.orgReconstructing past sea-level changes from storm-built beach ridges
Replied in thread
“If you only looked at the grounded ice change, you’d actually be underestimating the effect of the freshwater addition by about HALF. So, understanding & keeping track of the floating ice bit is important for those direct effects & then also those small #SeaLevel effects.”
These factors should be included in the discussion of sea level, he said, & he hopes new #climate models will reflect the details of #ocean-#IceShelf interactions, particularly in #Antarctica.
Replied in thread
“The effect of water going into the #ocean or fresh water going into the ocean is not just on #SeaLevel,” he said. “It also changes the stratification; it also changes potentially the carbon dioxide uptake & the temperature trends.”
While their effects might be minimal, these floating bodies of ice still contributed about .04 inches (1.1 millimeters) to sea level between 1994 & 2017 & are important to understanding these changes accurately.
Replied in thread
More from NASA:
This…becomes important when accounting for the total #SeaLevelRise, said Gavin Schmidt, dir of NASA’s Goddard Institute for Space Studies.
“Obviously, if you’ve got a huge glacier that falls into the sea, that raises #SeaLevel more than a floating ice shelf melting does,” he said. “But it’s not zero, & the reason why it’s not zero speaks to the complexities of the system.”
Fresh water flowing into the #ocean also can have broader implications.
The Dutch were already fucked, but now they are even more. But who cares about the Dutch, let's concentrate on the disasters going to happen in Bangladesh and other critical locations in the Global South.
Dr. Gilbz: *Antarctica might raise sea levels more than we thought*
https://youtube.com/watch?v=7THoXri-kdg
"The West Antarctic is currently chucking a load of ice into the ocean, adding rapidly to sea levels. And now, three new scientific studies have shown that the ice sheets may be more sensitive to warming than previously thought. These new findings could revise our sea level rise estimates upwards. I spoke to Dr Alex Bradley, who was involved in two of these new studies, about what this means, and why it doesn’t mean we should give up on climate action. Speaking of which... "
We’ve underestimated the ‘Doomsday’ glacier - and results could be devastating #glaciers #sealevel #oceans #ClimateCrisis https://www.independent.co.uk/climate-change/news/thwaites-doomsday-glacier-melting-study-b2548765.html
The Independent · We’ve underestimated the ‘Doomsday’ glacier - and results could be devastating
The linked article discusses the impacts of increasing rainfall in the Arctic, which is caused by the region’s rapid warming and sea ice loss. Some of the main effects are:
- Accelerated #ice loss and #sealevel rise from #rain-on-snow events on the #Greenland ice sheet.
- More #flooding, #permafrost thaw, #landslides, and #avalanches from heavy rain and #snowmelt
- Challenges for wildlife.
#climatechange #ActNow #climate
https://e360.yale.edu/features/arctic-rainfall-climate-change
