#sealevel — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #sealevel, aggregated by home.social.
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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 -
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 -
Huge cities, populations & economic sectors may be affected by sea level rise much faster than previously estimated... #Shanghai #Jakarta #Osaka #Bangkok #Nile #Mekong #YellowRiver
https://e360.yale.edu/features/sea-level-rise-land-subsidence -
Huge cities, populations & economic sectors may be affected by sea level rise much faster than previously estimated... #Shanghai #Jakarta #Osaka #Bangkok #Nile #Mekong #YellowRiver
https://e360.yale.edu/features/sea-level-rise-land-subsidence -
Huge cities, populations & economic sectors may be affected by sea level rise much faster than previously estimated... #Shanghai #Jakarta #Osaka #Bangkok #Nile #Mekong #YellowRiver
https://e360.yale.edu/features/sea-level-rise-land-subsidence -
Huge cities, populations & economic sectors may be affected by sea level rise much faster than previously estimated... #Shanghai #Jakarta #Osaka #Bangkok #Nile #Mekong #YellowRiver
https://e360.yale.edu/features/sea-level-rise-land-subsidence -
Huge cities, populations & economic sectors may be affected by sea level rise much faster than previously estimated... #Shanghai #Jakarta #Osaka #Bangkok #Nile #Mekong #YellowRiver
https://e360.yale.edu/features/sea-level-rise-land-subsidence -
Recently I was delighted to be invited to give a talk in the Campaign to Protect Rural England's Spring Webinar Series on 'The Changing West Antarctic Ice Sheet - Global and Local Implications'.
A recording is now available online
https://youtu.be/UkG24vHj0ps?si=F0vDdmMonkV8dIGM
#CPRE #Antarctica #sealevel -
#ESA:
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River deltas are sinking faster than the sea is rising
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".. 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."17.2.2026
#Copernicus #EO #Erdbeobachtung #Flussdelta #Meeresspiegel #Raumfahrt #RiverDelta #Satelliten #SeaLevel #Sentinel1 #subsidence #Subsidenz
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#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."17.2.2026
#Copernicus #EO #Erdbeobachtung #Flussdelta #Meeresspiegel #Raumfahrt #RiverDelta #Satelliten #SeaLevel #Sentinel1 #subsidence #Subsidenz
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Building Natural Seawalls To Fight Off The Rising Tide
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Eyes on Earth Episode 120 – Mapping the California Coastline [podcast]
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https://www.usgs.gov/centers/eros/science/eyes-earth-episode-120-mapping-california-coastline <-- shared link to podcast
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https://doi.org/10.1017/cft.2022.4 <-- shared paper
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#GIS #spatial #mapping #research #remotesensing #earthobservation #water #hydrology #marine #hydrospatial #bathymetry #topobathy #elevation #seafloor #landsat #Landsat9 #LandsatNext #resolution #coast #coastline #podcast #interview #California #USA #model #modeling #spatialanalysis #sealevelrise #SLR #sealevel #erosion #climatechange #risk #hazard #opendata #machinelearning #AI #oceangraphy
@USGS | @USGS_EROS -
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 -
The East Coast Is Sinking [USA]
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https://www.nytimes.com/interactive/2024/02/13/climate/flooding-sea-levels-groundwater.html <-- shared media article
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https://doi.org/10.1093/pnasnexus/pgad426 <-- shared paper
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#GIS #spatial #mapping #gischat #remotesensing #subsidence #EastCoast #USA #groundwater #pumping #overextraction #depletion #aquifers #waterresources #saltwaterintrusion #coast #coastal #engineeringgeology #soils #reclamation #sediments #compaction #water #hydrology #dewatering #SLR #sealevel #sealevelrise #climatechange #SLR #glacial #isostaticrebound #geology #landmovement #sedimentation #USGS
@USGS -
Six-Million-Year-Old Groundwater Pool Discovered Deep Under Sicilian Mountains
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https://phys.org/news/2023-12-six-million-year-old-groundwater-pool-deep-sicilian.html <-- shared technical article
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https://doi.org/10.1038/s43247-023-01077-w <-- shared paper
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[this was fascinating to read, especially as I have a deep interest in Sicily’s fascinating history including back to neolithic, cultural components & interactions, geology, food and drink (!), geographic setting, geomorphology, archaeology and so much more – and I want to live in the old part of Ragusa one day…]
#GIS #spatial #mapping #groundwater #water #hydrology #model #hydrogeology #geology #sicily #italy #deepgroundwater #marine #saltwater #Mediterranean #aquifer #3dmodel #spatialanalysis #spatiotemporal #aquifer #freshwater #rainwater #waterresources #well #groundwaterwell #meteoric #recharge #sealevel #coast #coastal #research -
https://fineartamerica.com/featured/little-red-lighthouse-karen-silvestri.html?product=spiral-notebook #LittleRedLighthouse is located under the #GeorgeWashingtonBridge It was once called #JefferyHook The #lighthouse sits #28feet above #sealevel #Journal #Notebook #ayearforart #buyintoart #photooftheday