#sealevel — Public Fediverse posts

Sea level change doesn't just flood cities, it can also move the ground under them. up and down. Rapid sea-level rise drives increased faulting, and when we look at it relative to glacial sea-level change, one can also see it.

Link: https://nhess.copernicus.org/articles/26/4053/2026/

#SeaLevel #Geohazard #Science

#Sealevel much higher than assumed in most #coastal #hazard assessments | Nature

https://www.nature.com/articles/s41586-026-10196-1 #climate

Report confirms record-high greenhouse gases, global sea level and ocean heat in 2025 https://phys.org/news/2026-08-high-greenhouse-gases-global-sea.html

#ocean #sea #sealevel #environment #heat #emissions

SpaceX plan for vast rocket launch site on Louisiana coast sparks backlash
By Oliver Milman

Opponents fear Elon Musk firm’s plan to develop 18-mile strip of Pecan Island will badly damage fragile ecosystem

https://www.theguardian.com/us-news/2026/aug/10/spacex-rocket-launch-site-louisiana-backlash

#Louisiana #SpaceX #USnews #Environment #Sealevel #TheGuardian #OliverMilman

SpaceX plan for vast rocket launch site on Louisiana coast sparks backlash https://www.theguardian.com/us-news/2026/aug/10/spacex-rocket-launch-site-louisiana-backlash #Louisiana #Spacex #UsNews #Environment #SeaLevel

Coastal Flooding At Predictable Hours
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https://doi.org/10.1038/s41467-026-75710-5 <-- shared paper
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H/T @bruna Alves | Nature Communications | Editor
“When do coastal floods happen? ⏱️🌊
A new study [link above] shows that, in many tide-dominated coastal regions, flooding tends to occur at specific and recurring times of day. Rather than being completely random, flood events often cluster around predictable hours driven by local tidal patterns.
By analysing coastal flood observations from the UK and the US, [the authors] show[ed] that the timing of flood events can be highly structured, with some locations experiencing floods disproportionately during certain parts of the day.
This adds a temporal dimension to coastal flood risk. We often focus on how frequently floods occur, how severe they are, and where they happen. This study highlights that when they occur may also matter, particularly as rising sea levels increase the frequency of coastal flooding.
The findings provide a useful perspective for coastal adaptation, risk communication, and emergency planning…”
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“Flooding is typically perceived as a sudden and unpredictable hazard. Here, [they] show that recurrent flooding can occur at highly predictable times in tidally dominated coastal systems. This predictability stems from phase-locking of tidal constituents and constituent pairs with the solar day, causing peak tides to recur at consistent local times set by regional tidal propagation. Using tide-gauge records from the United States and the United Kingdom, [they] quantif[ied] the intraday timing of coastal flood events and show strong clustering at specific hours, particularly where semidiurnal or mixed tides dominate. For example, floods in Boston cluster around noon and midnight, whereas in southern California they occur in the morning. Sites with stronger non-tidal variability show weaker clustering. This temporal predictability extends beyond nuisance flooding to larger consequential events involving inundation, road closures and infrastructural damage, highlighting opportunities for anticipatory risk communication, emergency planning and time-sensitive coastal adaptation…”
#coast #coastal #flood #flooding #spatialanalysis #spatiotemporal #time #statistics #geostatistics #tide #tidal #timing #temporal #floodrisk #risk #hazard #sealevel #sealevelrise #climatechange #emergency #planning #tideguage #UK #USA #innundation #infrastructure #transportation #riskcommunication

From Fragmentation To Integration - A Review Of Data–Model Integration In Land Subsidence Research
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https://doi.org/10.1016/j.ancene.2026.100567 <-- shared paper
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H/T @manonzero current drought conditions, increasing pressure on ecosystems, and ongoing climate adaptation challenges, land subsidence is receiving growing attention worldwide.
For anyone wanting to learn more about land subsidence, or get a refresher, [the authors] provide an overview of the processes involved, the ways it can be measured or estimated, the models used to simulate it, and how observations and models can be combined, [their] new [#openaccess] review paper [link above] may be of interest!
A central message of the paper is that understanding and managing land subsidence requires bringing these different sources of information together…”
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“HIGHLIGHTS:
• Presents a comprehensive synthesis that unifies all major elements of integral land-subsidence research.
• Defines the methodological steps needed for full integration and positions them within the broader challenges posed by subsidence.
• Brings together and distills the key components of data, modelling, and integration into a coherent framework.
ABSTRACT: Land subsidence, the sinking of the Earth’s surface, is a multi-faceted hazard driven by both natural and anthropogenic factors, and poses significant risk to environments, ecosystems, and society. Despite decades of growing research output, substantial gaps persist between investigations on the diversity of causes, reflected in data and model insufficiency. These gaps hinder the understanding of the issue and impede the effectiveness of mitigation measures. Many studies have urged to include all identified subsidence processes acting in a single area in an integral framework, for which a complex analysis has not systematically been outlined before. Therefore, [they] focus here on bridging the gaps between various technical research disciplines involved. [They] stress the urgency for an integral approach that combines observations with subsurface information of all known subsidence processes in an area, and [they] appeal for utilizing them in physics-guided data integrations. Only then can all subsidence drivers be understood, and effective mitigation measures designed. [They] outline the elements for an integral approach in categorical tables and schematized figures, and [they] discuss the main opportunities and challenges in a stepwise workflow. Leveraging these opportunities naturally leads to more robust, scalable, and policy-relevant solutions and fosters a more sustainable future…”
#Land #subsidence #processes #Verticallandmotion #SLR #sealevel #sealevelrise #relativesealevelrise #modeling #data #model #InSAR #elevation #holistic #GIS #spatial #mapping #climate #drought #extremeweather #climatechange #climateadaption #ecosystems #measurement #monitoring #research #review #framework #overview #risk #hazard #anthropogenic #mitigation #engineering #water #hydrology #policy #planning #design #remotesensing #spatialanalysis #spatiotemporal

Conventional wisdom for using corals as a paleo sea level indicator says that corals must live below the low tide level. This tidal pool, which has a sill above low tide, seems to break this rule!

#SeaLevel #coral

Quantifying UK Coastal Flood Exposure Under Future Sea-Level Rise To [2100 and] 2300
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https://doi.org/10.1038/s41467-026-74982-1 <-- shared paper
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https://www.theguardian.com/environment/2026/jul/21/millions-long-term-coastal-flooding-risk-uk-climate-action <-- shared media article
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H/T @University of Bristol School of Geographical Sciences
“🌊 New research on long-term coastal flooding as a result of climate inaction 🌊
… The researchers found:
🔷 By 2100 at least an additional 0.5 million people exposed to the 1-in-200 year undefended flood extent - a 25% increase compared to present day.
🔷 Under the most pessimistic storyline by 2300 involving significant ice-sheet instability, an additional 13 million people could be exposed to the 1-in-200 year undefended flood event.
🔷 Under some scenarios there is a need for large-scale movement of populations and settlements away from the coast in the coming centuries…”
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“Up to 13 million people in the UK face the long-term risk of coastal flooding due to the climate crisis, scientists have warned, with a ‘reasonable worst-case scenario’ suggesting the need for the large-scale movement of populations away from a dramatically reshaped coast…
Sea level has risen by about 20cm around the UK in the last century and is accelerating. A further 40cm to 60cm by 2100 is already baked in, meaning about half a million more people will be at risk of their homes being flooded, on top of the 2.5 million already in danger near the coasts. Lincolnshire and the Humber estuary are most in danger…”
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“The latest Intergovernmental Panel on Climate Change assessment report highlighted the potential for more than 15 metres of global sea-level rise by 2300. In this study, [the authors] explore the implications for UK coastal flood exposure by combining national-scale flood modelling with physically-based storylines of UK sea-level rise. By 2100 all storylines show broadly similar results with at least an additional ½ million people exposed to the 1-in-200 year undefended flood extent, which represents a 25% increase compared to present day. Under the most pessimistic storyline by 2300 involving significant ice-sheet instability, an additional 13 million people could be exposed to the 1-in-200 year undefended flood event. This would imply the potential need for large-scale movement of populations and settlements away from the coast in the coming centuries. Given current global emissions pledges, exposure increases by 1.7 million people by 2300, however up to 1 million could be avoided if Paris Agreement targets for greenhouse gas emissions are met…”
#coast #coastal #innundation #climatechange #global #sealevel #sealevelrise #SLR #flood #flooding #climatechange #population #infrastructure #UK #England #Scotland #Wales #NorthernIreland #Lincolnshire #Humber #estuary #settlement #city #urban #mitigation #planning #policy #infrastructure #risk #hazard #humanimpacts #spatialanalysis #spatiotemporal #GIS #spatial #mapping #coastalflooding #climatecrisis #model #modeling #elevation #DEM

Earth’s Hidden Thermostat Has Regulated Climate for 60 Million Years

For tens of millions of years, Earth’s climate may have been stabilized by a hidden feedback linking sea…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Science #climatechange #MarineGeology #Paleoclimatology #sealevel #syracuseuniversity
https://www.newsbeep.com/us/786809/

Earth’s Hidden Thermostat Has Regulated Climate for 60 Million Years

For tens of millions of years, Earth’s climate may have been stabilized by a hidden feedback linking sea…
#NewsBeep #News #Science #AU #Australia #Climatechange #MarineGeology #Paleoclimatology #SeaLevel #syracuseuniversity
https://www.newsbeep.com/au/824345/

I have posted the video version of episode 8 of the Raised Beaches Podcast. I discuss about the famous paleo sea level scientist, Paolo Pirazzoli, including the work he did in the Ryukyu Islands in Japan.

#geology #SeaLevel #ClimateChange

https://www.youtube.com/watch?v=WjYN2jzydaw

Millions face long-term coastal flooding risk in UK without climate action, scientists warn https://www.theguardian.com/environment/2026/jul/21/millions-long-term-coastal-flooding-risk-uk-climate-action #Flooding #ClimateCrisis #SeaLevel #Environment #UkNews

Millions face long-term coastal flooding risk in UK without climate action, scientists warn
By Damian Carrington Environment editor

A ‘reasonable worst-case scenario’ suggests need for large-scale movement of populations away from reshaped coast

https://www.theguardian.com/environment/2026/jul/21/millions-long-term-coastal-flooding-risk-uk-climate-action

#Flooding #Climatecrisis #Sealevel #Environment #UKnews #TheGuardian #DamianCarringtonEnvironmenteditor

I have released episode 8 of the Raised Beaches Podcast, where I give a profile on the famous paleo sea level scientist, Paolo Pirazzoli.

#Geology #SeaLevel #Podcast

https://www.buzzsprout.com//2401751/episodes/19522927-episode-8-profile-of-paolo-pirazzoli-paleo-sea-level-scientist

Beyond The 100-Year Flood - Probabilistic Flood Hazard Assessment For King And Pierce Counties Under Future Climate Scenarios
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https://doi.org/10.5194/nhess-26-3231-2026 <-- shared #openacess paper
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[part of my old stomping ground as an engineering geologist]
H/T @Kees Nederhoff
“Flood maps are usually built from a single design storm. For King and Pierce Counties in the Pacific Northwest (USA), [the authors] tried the opposite - simulate 82 years of actual coastal and river conditions (plus 18 synthetic years) with SFINCS and let the statistics fall out cell by cell. That took about 5,400 yearly simulations and 194,000 CPU hours on USGS's Hovenweep HPC. Worth it!
The design-event shortcut turns out to hide a real hazard. A deterministic 10-year event underestimated flood depths by up to half a meter compared to the continuous runs.
The bigger surprise [to the authors] was how one-sided the climate signal is. One metre of sea level rise takes King County's expected annual flooded area from 161 --> 787 hectares, almost a factor of five. Changes in storminess over the same horizon barely register. And somewhere between 100 and 150 cm of SLR, land that never floods today starts flooding fast. If you plan adaptation in Puget Sound, that threshold matters more than any single return-period map.
[They] also propose Expected Annual Flooded Area (EAFA) as a probability-weighted alternative to the binary "inside or outside the 100-year zone" label…”
#USGS #supercomputing #Hovenweep #HPC #coast #coastal #PNW #Seattle #PacificNorthwest #risk #hazard #riskmanagement #model #modeling #CFRM #deterministic #probabilistic #climatechange #extremeweather #fedscience #WA #KingCounty #PierceCounty #WashingtonState #USA #flood #flooding #compoundflooding #floodmaps #SFINCS #storm #weather #climate #climatechange #rainfall #precipitation #sealevel #sealevelrise #SLR #100yearflood #floodhazardmapping #returnperiods #pluvial #fluvial #spatialanalysis #spatiotemporal #remotesensing #streamgage #history #historicflooding #projections #predictions
#USGS

Romero et al present an ice-free and paleo sea level chronology for James Ross Island in the northeastern Antarctic Peninsula area. They found that the advance of the local ice cap happened sometime after 40,000 years ago, and this implies a period of retreated ice in MIS 3.

#Geology #Antarctica #IceSheets #SeaLevel

https://doi.org/10.1016/j.quascirev.2026.110133

💁🏻‍♀️ TIL: 🌊🔥 #Ocean temperatures hit a record 21° C on June 21, 2026, driven by a strong #ElNiño layered over human caused #climatechange.

Scientists confirmed the new high, warning of consequences for #weather patterns, #sealevel rise, and #marine #ecosystems. Experts project 2026 could become the hottest year on record, with 2027 likely hotter still.

👉 https://gizmodo.com/earth-entering-uncharted-territory-as-ocean-temperatures-hit-record-high-in-june-2000780077

#climate #elnino #globalwarming #records #copernicus #noaa #science #climate #storms

While there is agreement that sea levels are rising (not just subsidence, the only way some parts of the world are allowed to talk about it). But we're still working on the "how much" and what is the scale of the different contributors.

Link: https://www.science.org/doi/10.1126/sciadv.aea0652

#SeaLevel #Ocean #ClimateChange

‘The sea took everything away’: how Nigeria’s ‘Happy City’ is disappearing beneath the waves https://www.theguardian.com/environment/2026/jun/18/the-sea-took-everything-away-how-nigerias-happy-city-is-disappearing-beneath-the-waves #EndangeredHabitats #ClimateCrisis #Environment #Nigeria #Africa #Flooding #Coastlines #SeaLevel

How is this for a feedback loop?

Ice sheets build up during a glaciation lowering global sea level → reduced water load leads to increased mid ocean ridge volcanism after a 10-20 kyr lag → volcanism releases iron in the ocean → iron causes plankton blooms → atmospheric CO₂ goes down → ice sheets build up

#ClimateChange #IceSheets #SeaLevel

https://www.nature.com/articles/s41561-026-01982-7

‘Severe’ stress on oceans as rate of sea level rise doubles in 10 years, UN warns https://www.theguardian.com/environment/2026/jun/08/un-world-ocean-assessment-severe-stress-sea-level-rise-doubles-pollution-fishing-climate

#environment #ocean #sea #SeaLevel #SeaLevelRise

Two sister cities. A rising sea level. A shared thought experiment. 🌊

// How to bridge San Francisco and Kiel – A Sea Level Project
What if Kiel and San Francisco shared a clock – calibrated not to seconds, but to the rising sea? Jonathon Keats, Stephan Juricke, Tim Logan & Axel Schulz think it through at #Waterkant26.
18 – 19 June 2026 // MFG5 Kiel // GET YOUR TICKETS NOW: https://www.talque.com/go/ticket/acLVSX2j1VHLqMuRtTn0/shop

#sealevel #climatechange #science #kiel #sanfrancisco #waterkant26

Amoc collapse could change Europe’s climate 10x faster than expected. We aren’t ready https://www.theguardian.com/commentisfree/2026/jun/14/amoc-collapse-europe-climate #Environment #Europe #ClimateCrisis #SeaLevel #EuropeanUnion #TrumpAdministration #Oceans #WorldNews

Record winter temperatures in Antarctic raise fears over speed of climate breakdown https://www.theguardian.com/environment/2026/jun/10/record-winter-temperatures-in-antarctic-raise-fears-over-speed-of-climate-breakdown #ClimateCrisis #Antarctica #Environment #WorldNews #SeaLevel #Oceans #Ice

How To Study Coastal Evolution
Researchers reviewed what’s known about how coastlines are changing and made recommendations for how to learn more
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https://eos.org/research-spotlights/how-to-study-coastal-evolution <-- shared technical article
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https://doi.org/10.1029/2024EF005833 <-- shared paper
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#coast #coastal #coastline #change #prediction #spatiotemporal #spatialanalysis #USA #extremeweather #storm #stormsurge #sealevel #sealevelrise #SLR #risk #hazard #mitigation #shorelines #habitat #ecosystem #inlets #flood #flooding #wetlands #processes #ecosystems #community #planning #policy #coordinated #framework #management #decisionmaking #overview #naturalprocesses #innundation #damage #infrastructure #landforms #CoastalScience #ClimateChange #SeaLevelRise #EarthsFuture #AGU #CoastalResilience
@USGS @NOAA @NOAA Centers for Coastal Ocean Science

Assessment of Shoreline Change in Southeast Ireland Using Geospatial Techniques
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https://doi.org/10.3390/su18073280 <-- shared paper
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"... KEY INSIGHTS:
• Coastlines are highly dynamic — 57% accretion vs 42% erosion
• Strong contrasts between east-facing (Irish Sea) and south-facing (Atlantic) coasts
• Identification of critical erosion hotspots (e.g., Tramore) and accretion zones in embayments
• Coastal change is driven by a combination of wave climate, sediment availability, geology, and human activity
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#GIS #spatial #mapping #Ireland #coast #coastal #dynamics #erosion #accretion #shoreline #change #digitalshoreline #spatialanalysis #spatiotemporal #remotesensing #earthobservation #SoutheastIreland #embayments #wave #climate #stormsurge #geology #humanimpacts #coastalmanagement #risk #hazard #mitigation #sealevel #RSL #risingsealevels #climatechanage #adaption #extremeweather #stormintensity #planning #monitoring #sustainable #Landsat #satellite #regional

#ESA:
"
River deltas are sinking faster than the sea is rising
"
".. river deltas, home to about 5% of the global population .. are experiencing subsidence, which exacerbates the risks from sea-level rise. .. Sentinel-1 mission has captured a decade's worth of data showing land sinking faster than previously thought."

https://www.esa.int/Applications/Observing_the_Earth/Copernicus/Sentinel-1/River_deltas_are_sinking_faster_than_the_sea_is_rising

17.2.2026

#Copernicus #EO #Erdbeobachtung #Flussdelta #Meeresspiegel #Raumfahrt #RiverDelta #Satelliten #SeaLevel #Sentinel1 #subsidence #Subsidenz

New Study Links Flood Risk And Hurricane Attributes In Southwest Florida
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https://coastalscience.noaa.gov/news/new-study-links-flood-risk-and-hurricane-attributes-in-southwest-florida/ <-- shared technical article
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https://doi.org/10.1038/s44304-025-00141-z <-- shared paper
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H/T NOAA Centers for Coastal Ocean Science
#water #hydrology #extremeweather #flood #flooding #hurricane #model #modeling #Irma #Ian #HurricaneIrma #HurricaneIan #cost #damage #infrastructure #damage #FEMA #HAZUS #Florida #CollierCounty #insurance #risk #hazard #usecase #casestudy #publicsafety #SLR #sealevel #sealevelrise #floodmodel #model #modeling #spatialanalysis #opendata #storm #stormsurge #vegetation #mangrove #NFIP #spatial #GIS #mapping
#NOAA

The impacts of fossil fuel emissions are gnawing on Australia's coastline

"Australia's exposure to current and future risks from the sea, including coastal erosion, king tides and rising sea levels, was "very high", The Insurance Council of Australia.

"Sea level rise caused by climate change would mean the issue was not going away, and Australians needed to consider what we valued about our coastline."

"Why a seawall might not protect both beaches and homes from coastal erosion...We'll end up with a giant wall around our beaches, or around our whole coastline. That's not saving the landscape, that's saving the infrastructure. We've got to slow down development and look at what we value about the beach."

Professor Kennedy "said governments would need to consider buying back beachfront land and rehabilitating it, to protect both infrastructure and the beach."
>>
https://www.abc.net.au/news/2025-07-22/frankston-seawall-tides-costal-erosion-housing-australia/105555380
#Coast #erosion #inundation #FossilFuels #climate #SeaLevel #values #Coastal #sprawl #StrandedAssets #SandCastles #walls #PublicLand

Global #sealevels are rising faster and faster. It spells catastrophe for #coastal towns and cities
Though global #sealevel "varied little" for the 2,000 years before the 20th century, sea levels then "started rising and have not stopped since — and the pace is accelerating."
What #scientists are crystal clear about is the reason for #sealivelrise: human-caused #globalwarming.
https://www.cnn.com/2025/05/09/climate/sea-level-rise-melting-ice-sheets
#climatechange #climatecrisis

#GreatWhiteSharks split into 3 populations 200,000 years ago and never mixed again — except for one hybrid found in #BermudaTriangle
Scientists found 3 great white #shark populations that congregate in different #oceans and do not interbreed. Their separation may have implications for conservation.
Unclear why populations split in first place. Researchers suspect drop in #sealevel and changes in ocean currents and temperature created biogeographical barrier for sharks.
https://www.livescience.com/animals/sharks/great-white-sharks-split-into-3-populations-200000-years-ago-and-never-mixed-again-except-for-one-hybrid-found-in-the-bermuda-triangle

Alaska's Juneau Icefield Is Melting At An 'Incredibly Worrying' 50,000 Gallons Per Second [1,577 billion (!) gallons per year]
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https://www.smithsonianmag.com/smart-news/alaskas-juneau-icefield-is-melting-at-an-incredibly-worrying-50000-gallons-per-second-researchers-find-180984650/ <-- shared technical article
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https://doi.org/10.1038/s41467-024-49269-y <-- shared paper
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#GIS #spatial #mapping #climatechange #glacier #glacial #melting #meltwater #Juneau #JuneauIcefield #geology #geomorphology #water #hydrology #snow #ice #Canada #USA #Alaska #BritishColumbia #remotesensing #satellite #imagery #humanimpacts #sealevelrise #SLR #sealevel #temperature #glaciers #icefield #risk #hazard #cryosphere

Today's bike ride was to the coast and back. Here's a postcard, and a couple of photos of where the postcard photo was taken.

Dykes like this protect the entire country from the sea.
#netherlands #dykes #sealevel #regel17

Liquefaction And Sea-Level Rise
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https://www.usgs.gov/tools/liquefaction-and-sea-level-rise <-- shared technical article
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https://geonarrative.usgs.gov/liquefactionandsealevelrise/ <-- shared story map
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https://www.theatlantic.com/science/archive/2019/06/earthquakes-and-sea-level-rise-are-deadly-combination/592945/ <-- shared media article
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#GIS #spatial #mapping #model #modeling #earthquake #sealevelrise #risk #hazard #liquefaction #suspectibility #potential #climatechange #SanFranciso #haywire #haywardfault #CoastalStormModelingSystem #CSMS #spatialanalysis #geology #engineeringgeology #hydrology #water #soil #sediment #groundwater #aquifer #coast #coastal #SLR #sealevel #groundwatertable #sensitivesoils #hazardanalysis #riskmanagement #fill #artificialfill #backfill #usgs #California #USA

Worried About Sea Level Rise? Look For The Lichens
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https://hakaimagazine.com/news/worried-about-sea-level-rise-look-for-the-lichens/ <-- shared article
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#GIS #spatial #mapping #marine #climatechange #SLR #sealevel #sealevelrise #lichen #environmental #water #future #infrastructure #coast #coastal #indicators #spatialanalysis #spatiotemporal #saltwater #flooding #inundation #species #algae #cyanobacteria #fungus #risk #planning #hazard #impacts #impactassessment

Work in progress #reclaimthestreets #verkehrswende #multispeciesfutures #animalutopia #togetherness #sealevel #cowsonstreet #penguinsonthestreets #kiddrawonstreet #picniconthestreet #veganpainting #animalliberation #transformation #hartmutkiewert #studio #spinnereileipzig

Work in progress #reclaimthestreets #verkehrswende #multispeciesfutures #animalutopia #togetherness #sealevel #cowsonstreet #penguinsonthestreets #kiddrawonstreet #picniconthestreet #veganpainting #animalliberation #transformation #hartmutkiewert #studio #spinnereileipzig

Work in progress #reclaimthestreets #verkehrswende #multispeciesfutures #animalutopia #togetherness #sealevel #cowsonstreet #penguinsonthestreets #kiddrawonstreet #picniconthestreet #veganpainting #animalliberation #transformation #hartmutkiewert #studio #spinnereileipzig