#altimetry — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #altimetry, aggregated by home.social.
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Rising Waters Swamp Lake Naivasha [Kenya] [earth observation]
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https://science.nasa.gov/earth/earth-observatory/rising-waters-swamp-lake-naivasha/ <-- shared NASA 2026 technical article
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https://africasacountry.com/2026/04/the-human-cost-of-kenyas-expanding-lakes <-- shared 2026 technical article
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https://carrzee.org/wp-content/uploads/2021/11/kenyarisingwatermenr-scoping-report-latest-5-07-21.pdf <-- shared technical report
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https://earth.gsfc.nasa.gov/gwm/lake/91 <-- shared charting, lake water levels
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https://doi.org/10.11648/j.ajrs.20180602.13 <-- shared 2018 paper, ‘An Assessment of the Role of Water Hyacinth in the Water Level Changes of Lake Naivasha Using GIS and Remote Sensing’
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https://apnews.com/article/kenya-water-hyacinth-invasive-fishing-2ea35d0203bc995a36ddbe32386c1141 <-- shared 2025 media article, ‘How the invasive water hyacinth is threatening fishermen’s livelihoods on … Kenyan [Lake Naivasha]…’
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https://apnews.com/article/kenya-rising-lakes-naivasha-baringo-cbfbb0b670f831b9a310309a810a0075 <-- shared 2025 media article
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https://www.sei.org/features/revisiting-the-rising-rift-valley-lakes-a-glimpse-into-kihotos-struggles/ <-- shared 2023 technical article
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https://www.theguardian.com/world/2022/mar/17/kenya-quiet-slide-underwater-great-rift-valley-lakes-east-africa-flooding <-- shared 2022 media rticle
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“Kenya's Lake Naivasha has long been a place of change and reinvention…
Now the lake faces another major change: rapidly fluctuating water levels. The name Naivasha comes from a Maasai word meaning "that which heaves," an apt description of the freshwater lake over the past 25 years. Satellite altimetry measurements of the lake's depth indicate an increase of about 7 metres (23 feet) since 2010, roughly the height of a two-story building. Over the same period, Landsat observed a roughly 40 percent increase in the lake's area, adding 50 kilometres² (19 miles²) of water, equivalent to roughly 15 Central Parks.
The human and economic toll of the rising water levels is considerable..”
#Kenya #LakeNaivasha #Africa #water #hydrology #hydrography #risingwater #waterlevels #GIS #spatial #mapping #spatialanalysis #spatiotemporal #humanimpacts #farming #agriculture #infrastructure #damage #community #satellite #altimetry #economy #cost #impact #change #flood #flooding #innundation
@nasa -
One of the most complex #visualizations of #Earth’s ocean dynamics to date, by #NASA.
Leveraging #satellite #altimetry, #scatterometry, and state-of-the-art numerical #ocean #models, the #map exposes the planet’s vast current systems: oceanic jets, #mesoscale eddies spanning hundreds of kilometers, and the Gulf Stream.
(Looks quite a bit like Van Gogh’s Starry Night! Yet, this is pure fluid dynamics, no #AI involved.)
Video cut: Gregory Bufithis
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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 -
Our partner @ifremer_fr is working hard on our future small icebergs climate products, based on #altimetry. The data record, covering 1992 to present. This product is planned to be released in 2026 !
For more information, check our latest story : https://osi-saf.eumetsat.int/community/stories/eumetsat-osi-saf-iceberg-climate-products -
Observing The Tidal Pulse Of Rivers From Wide-Swath Satellite Altimetry
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https://doi.org/10.1038/s41586-026-10287-z <-- shared paper
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https://dahiti.dgfi.tum.de/en/products/river-tides/map/ <-- shared interactive map, ‘River Tides from SWOT’
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#SWOT #RemoteSensing #Hydrology #EarthObservation #ClimateScience #CoastalSystems #Rivers #OpenScience #opendata #tide #tidal #dynamics #exchange #estuary #estuarine #webmap #wetlands #ecosystems #habitat #elevation #marine #freshwater #water #hydrography #hydrology #river #GIS #spatial #mapping #satellite #altimetry #coast #coastal #GIS #spatial #mapping #spatialanalysis #spatiotemporal #SurfaceWaterandOceanTopography #global #coverage #monitoring #model #modeling #riverine #fluvial #carbonbudgets #nitrogencycle #sedimentation #sealevelrise #SLR #megadroughts #extraction #pumping #regulations #groundwater #intrusion #risk #hazard #naturalhazards #stormsurge #waterresources #tidalrange #rivermouth -
Satellite Captures The First Detailed Look At A Massive Tsunami
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https://www.earth.com/news/satellite-captures-the-first-detailed-look-at-a-giant-tsunami/ <-- shared technical article
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https://doi.org/10.1785/0320250037 <-- shared paper
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#GIS #spatial #mapping #satellite #remotesensing #earthobservation #geology #tectonics #Kuril #Kamchatka #Russia #Pacific #tsunami #NASA #SWOT #energy #dissipation #risk #hazard #model #modeling #DART #buoy #observation #instrumentation #waveforms #propogation #geodetic #spatialanalysis #spatiotemporal #marine #wave #megathrust #rupture #mechanics #altimetry #forecasting #hydrodynamic -
Data In Action: The 2022 Hunga-Tonga Hunga-Ha′Apai Eruption - Altimetry Data And Models Help Us Understand How A Volcanic Eruption Generated A Tsunami
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https://podaac.jpl.nasa.gov/DataAction-2025-03-20-The-2022-Hunga-Tonga-Hunga-Haapai-eruption-Altimetry-data-and-models-help-us-understand-how-a-volcanic-eruption-generated-a-tsunami <-- shared technical article
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https://doi.org/10.1038/s43247-024-01694-z <-- shared paper
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https://podaac.jpl.nasa.gov/dataset/JASON_CS_S6A_L2_ALT_LR_RED_OST_NTC_F08 <-- shared NASA dataset - Sentinel-6A MF Jason-CS L2 P4 Altimeter Low Resolution (LR) NTC Reduced Ocean Surface Topography F08
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#GIS #spatial #mapping #earthobservation #remotesensing #fedscience #tonga #HungaTonga #HungaHaApai #eruption #volcanic #volcano #Pacific #marine #geology #engineeringgeology #risk #hazard #satellite #altimetry #data #model #model #spatialanalysis #Tsunami #risk #hazard #monitoring #coast #coastal #naturalhazard #Sentinel #sealevel #warning #earlywarning
@nasa -
Satellites Reveal Stunningly Detailed Maps Of Earth's Seafloors
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https://www.livescience.com/planet-earth/rivers-oceans/satellites-reveal-stunningly-detailed-maps-of-earths-seafloors <-- shared technical / media article
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https://swot.jpl.nasa.gov/ <-- SWOT home page
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https://doi.org/10.1126/science.ads4472 <-- shared paper
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#GIS #spatial #mapping #remotesensing #satellite #SWOT #NASA #marine #global #tectonics #geology #underwater #structuralgeology #currents #ocean #oceansurface #gravity #hills #volcanoes #tectonicplates #abyssal #ridges #geology #model #seamounts #continentalmargins #oceancurrents #nutrienttransport #seawater #geologichistory #altimetry #gravimetry #VGG #topography #radaraltimetry #global #seafloor #marine -
Our Very Strange Search for ‘Sea Level’
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https://www.newyorker.com/magazine/2024/08/26/our-very-strange-search-for-sea-level <-- shared media/technical article
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#GIS #spatial #mapping #elevation #vertical #geoid #datum #verticaldatum #sealevel #risingsealevel #RSL #climatechange #survey #change #geology #isostaticrebound #glaciation #groundwater #subsidence #remotesensing #GPS #LiDAR #altimetry #change #spatialanalysis #model #modeling #spatiotemporal #sealrock #meansealevel #NGVD29 #NAVD88 -
Global Seafloor Topography – measured & estimated from gravity data derived from satellite altimetry and shipboard depth soundings. (noaa.gov)
This image is so beautiful, but not yet entirely accurate in detail https://gogeomatics.ca/mapping-the-deep-our-map-of-the-ocean-remains-a-work-in-progress/ #oceanography #seafloor #altimetry #sonar -
2023年の海洋表面トポグラフィーサイエンスチーム会議の要約
https://science.nasa.gov/uncategorized/summary-of-the-2023-ocean-surface-topography-science-team-meeting/
2023年11月にプエルトリコのサンフアンで開催されたOcean Surface Topography Science Team Meetingについて。衛星ミッションの技術問題や将来のミッションについて議論が行われた。
S6MFやJason-3などのミッションの状況も報告された。 #NASA #JPL #altimetry -
Read the European Space Agency's story about how Tero Water Level methodology developed by @isardsat, @smhi & @lobeliaearth helped reveal hundreds of previously undetectable small lakes in the #Arctic
This method uses #altimetry data to detect small water bodies anywhere in the 🌍
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We have developed a novel #AI based approach for tracking radar #altimetry measurements over ice sheets. This new AWI-ICENet1 retracker reduces the effect of signal penetration and outperforms current retracking methods. Preprint now open for discussion: https://doi.org/10.5194/tc-2023-80
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The Sources Of Sea-Level Changes In The Mediterranean Sea Since 1960
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https://doi.org/10.1029/2022JC019061 <-- shared paper
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KEY POINTS:
• The average rate of sea-level rise in the Mediterranean Sea increased from −0.3 mm yr−1 in the period 1960–1989 to 3.6 mm yr−1 in 2000–2018
• Sterodynamic and land-mass changes both have made comparable contributions to the Mediterranean sea-level rise since 2000
• Since 2000, sea level has been rising faster in the Adriatic, Aegean, and Levantine Seas than anywhere else in the Mediterranean Sea…”
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#GIS #spatial #mapping #Mediterranean #climatechange #SLR #sealevelrise #model #modeling #remotesensing #history #change #trends #satellite #altimetry #tideguages #gauges #hydrography #hydrospatial #spatialanalysis #probabilistic #Baysean #glacier #melting