#sealevel — Public Fediverse posts

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

Sea Levels Rising Dramatically In Some Areas Due To Land Subsidence [global]
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https://phys.org/news/2026-05-sea-areas-due-subsidence.html <-- shared technical article
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https://doi.org/10.1038/s41467-026-72293-z <-- shared paper
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[#VLM = vertical land motion; #ASL = absolute sea-level; #RSL = relative sea-level; #GIA = (global) Glacial Isostatic Adjustment; #inSAR = Interferometric Synthetic Aperture Radar; #GNSS = Global Navigation Satellite System (~GPS); #OE24 = paper, https://doi.org/10.1038/s41561-023-01357-2, interpolated VLM reconstruction based on the joint analysis of GNSS, tide gauges (TGs), and satellite altimetry]
#GIS #spatial #mapping #remotesensing #earthobservation #sealevel #verticallandmotion #absolutesealevel #relativesealevel #GlacialIsostaticAdjustment #geomorphometry #SLR #sealevelrise #coast #coastal #flood #flooding #subsidence #landmass #landsubsidence #global #globalsealevelrise #climatechange #city #urban #farmlands #population #demographics #cities #planning #community #elevation #monitoring #spatialanalysis #spatiotemporal #altimetry

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

New User Guides Available - Coastal Inundation Dashboard | Coastal Ocean Reanalysis | Inundation Analysis Tool
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https://tidesandcurrents.noaa.gov/news_posts/article.html?post=2517 <-- shared technical resource 🔗
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https://tidesandcurrents.noaa.gov/ <-- shared NOAA Tides & Currents resource 🔗
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https://coast.noaa.gov/digitalcoast/topics/coastal-inundation.html <-- shared NOAA Coastal Inundation web portal 🔗
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https://tidesandcurrents.noaa.gov/cora.html <-- shared NOAA Coastal Ocean Reanalysis (CORA) web portal 🔗
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https://tidesandcurrents.noaa.gov/inundationanalysis/station_list.html <-- shared NOAA Inundation Analysis Tool web portal
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#coast #coastal #innundation #webtools #spatialanalysis #spatiotemporal #flood #flooding #risk #hazard #products #datasets #opendata #risk #hazard #analysis #GIS #spatial #mapping #guides #userguides #selfdirected #learning #education #tutorial #openscience #fedsservive #fedscience #publicgood #publicsafety #USA #tides #tidal #stormsurge #SLR #sealevel #sealevelrise #subsidence #CORA #COOPS
#NOAA

High Resolution Simulation Of Urban Compound Flooding Under Climate Impacts
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https://doi.org/10.1016/j.uclim.2026.102771 <-- shared paper
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#ClimateChange #FloodResilience #UrbanPlanning #ClimateAdaptation #HydrodynamicModeling #CompoundFlooding #SeaLevelRise #sealevel #Flood #flooding #depth #hazard #risk #riskassessment #Urban #urbanplanning #resilience #NewYorkCity #NYC #Hoboken #NewJersey #infrastructure #damage #cost #economics #vulnerability #urban #hydrodynamic #city #cities #climatechange #extremeweather #model #modeling #spatial #GIS #mapping #spatialanalysis #spatiotemporal #highresolution #pluvia #rainfall #precipitation #fluvial #HurricaneIda #stormsurge #building #structures #topography #drainagesystems #infiltration #emergencyservices #framework #workflow #methodology

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

3D Coastal Mapping [New Zealand]
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https://www.linz.govt.nz/products-services/data/3d-coastal-mapping <-- shared technical overview
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https://data.linz.govt.nz/layer/122508-new-zealand-coastal-lidar-1m-dem/ <-- shared New Zealand Coastal LiDAR 1m DEM
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#GIS #spatial #mapping #coast #coastal #opendata #NewZealand #remotesensing #LiDAR #earthovservation #3D #3DCM #climatechange #sealevel #sealevelrise #SLR #risk #hazard #spatialdata #mitigation #topography #bathymentry #geomorphmetry #humanimpacts #seafloor #marine #ocean #policy #planning #communities #infrastructure #biodiversity #habitat #tsunami #earthquake #RingOfFire #flood #innundation #flooding #LINZ #hydrology #hydrography #maritime #safety
@Toitū Te Whenua Land Information New Zealand @LINZ

Advancing Compound Flood Modeling to Evaluate Coastal Protection Benefits of Natural Infrastructure
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https://coastalscience.noaa.gov/news/advancing-compound-flood-modeling-to-evaluate-coastal-protection-benefits-of-natural-infrastructure/ <-- shared technical article
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https://doi.org/10.1016/j.scitotenv.2024.173529 <-- shared paper
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#flood #flooding #literaturesearch #compilation #coast #coastal #coastalengineering #mitigation #planning #management #framework #model #modeling #infrastructure #natural #barrier #rainfall #precipitation #climatechange #river #discharge #stormsurge #sealevel #seallevelrise #waves #tides #compoundflooding #humanimpacts #communities #publicsafety #cost #loss #economics #fedscience #fedservice #hydrology #water #marine #ocean #hydraulic #hydrodynamic #biology #ecosystems #vegetation #sedimentation #erosion #GIS #spatial #mapping #spatialanalysis #regional #local #forecasting #preparation #enduser #usecase #publicwarnings #marsh #sawmp #mangrove
@NOAA | @NOAA Ocean | @NOAA Centers for Coastal Ocean Science

New Zealand's Major Cities Are Sinking
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https://www.forbes.com/sites/lauriewinkless/2025/04/16/new-zealands-major-cities-are-sinking/ <-- shared media article
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https://doi.org/10.1080/00288306.2025.2470435 <-- shared paper
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https://www.searise.nz/ <-- linked to NZ SeaRise project page
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https://searise.takiwa.co/map/6233f47872b8190018373db9/embed <-- NZ SeaRise web map
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#GIS #spatial #mapping #NewZealand #sealevel #sealevelrise #SLR #impacts #humanimpacts #land #subsidence #sinking #population #growth #risk #hazard #global #GMSL #coast #coastal #planning #management #mitigation #extremeweather #climatechange #cost #economics #infrastructure #spatialanalysis #spatiotemporal #model #modeling #remotesensing #earthobservation #sentinel #InSAR #urban #city #cities #reclamation #cut #fill #Holocene #engineeringgeology #kiwi #k1w1 #NZ #stormsurge

My girlie chart with 490ky years of #Milankovic cycles, CO2, sea level, and the top line is d18O of a sediment core from within the #ColdBlob, see map. I think, it records AMOC shutdowns in the past.

Would be intriguing to know why it shut down. Eg, 427ka, "just" before the interglacial MIS11.
And why it not shut down during that very long interglacial which was ~as warm as the Holocene,
and had an ice-free West #Greenland (with a leaf found just 2 years ago at rock-bottom of an ice core from there),

and why AMOC instead collapsed in the middle of the following #iceage.

The very long interglacial MIS11 with its ice-free West Greenland and stable AMOC throughout tells me that the amount of freshwater input from melting ice on its own isn't the trigger for a collapse. But instead, the speed at which freshwater is added: very slowly like during #MIS11 won't do it.

Also intriguing: why the stuttering motor during the last glacial before the #Holocene?

#d18O from sediment cores at other locations strictly follow the ups and downs of #sealevel and #CO2. This one site #IODP #U1308 is exceptional.
#paleoclimate #AMOC

My girlie chart with 490ky years of #Milankovic cycles, CO2, sea level, and the top line is d18O of a sediment core from within the #ColdBlob, see map. I think, it records AMOC shutdowns in the past.

Would be intriguing to know why it shut down. Eg, 427ka, "just" before the interglacial MIS11.
And why it not shut down during that very long interglacial which was ~as warm as the Holocene,
and had an ice-free West #Greenland (with a leaf found just 2 years ago at rock-bottom of an ice core from there),

and why AMOC instead collapsed in the middle of the following #iceage.

The very long interglacial MIS11 with its ice-free West Greenland and stable AMOC throughout tells me that the amount of freshwater input from melting ice on its own isn't the trigger for a collapse. But instead, the speed at which freshwater is added: very slowly like during #MIS11 won't do it.

Also intriguing: why the stuttering motor during the last glacial before the #Holocene?

#d18O from sediment cores at other locations strictly follow the ups and downs of #sealevel and #CO2. This one site #IODP #U1308 is exceptional.
#paleoclimate #AMOC

My girlie chart with 490ky years of #Milankovic cycles, CO2, sea level, and the top line is d18O of a sediment core from within the #ColdBlob, see map. I think, it records AMOC shutdowns in the past.

Would be intriguing to know why it shut down. Eg, 427ka, "just" before the interglacial MIS11.
And why it not shut down during that very long interglacial which was ~as warm as the Holocene,
and had an ice-free West #Greenland (with a leaf found just 2 years ago at rock-bottom of an ice core from there),

and why AMOC instead collapsed in the middle of the following #iceage.

The very long interglacial MIS11 with its ice-free West Greenland and stable AMOC throughout tells me that the amount of freshwater input from melting ice on its own isn't the trigger for a collapse. But instead, the speed at which freshwater is added: very slowly like during #MIS11 won't do it.

Also intriguing: why the stuttering motor during the last glacial before the #Holocene?

#d18O from sediment cores at other locations strictly follow the ups and downs of #sealevel and #CO2. This one site #IODP #U1308 is exceptional.
#paleoclimate #AMOC

My girlie chart with 490ky years of #Milankovic cycles, CO2, sea level, and the top line is d18O of a sediment core from within the #ColdBlob, see map. I think, it records AMOC shutdowns in the past.

Would be intriguing to know why it shut down. Eg, 427ka, "just" before the interglacial MIS11.
And why it not shut down during that very long interglacial which was ~as warm as the Holocene,
and had an ice-free West #Greenland (with a leaf found just 2 years ago at rock-bottom of an ice core from there),

and why AMOC instead collapsed in the middle of the following #iceage.

The very long interglacial MIS11 with its ice-free West Greenland and stable AMOC throughout tells me that the amount of freshwater input from melting ice on its own isn't the trigger for a collapse. But instead, the speed at which freshwater is added: very slowly like during #MIS11 won't do it.

Also intriguing: why the stuttering motor during the last glacial before the #Holocene?

#d18O from sediment cores at other locations strictly follow the ups and downs of #sealevel and #CO2. This one site #IODP #U1308 is exceptional.
#paleoclimate #AMOC

NASA Uses 30-Year Satellite Record To Track And Project Rising Seas
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https://www.nasa.gov/feature/jpl/nasa-uses-30-year-satellite-record-to-track-and-project-rising-seas <-- shared article
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https://sealevel.nasa.gov/ <-- NASA sealevel page
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#GIS #spatial #mapping #remotesensing #satellite #climatechange #water #society #change #sealevel #sealevelrise #SLR #model #modeling #lanina #hydrology #climate #hydrographic #hydrospatial #spatialanalysis #spatiotemporal #TOPEX #Poseidon #SeaLevelChange #anthropogenic #publicsafety #marine #global #gischat #NASA #JPL
@nasa

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