{"id":467211,"date":"2026-08-31T03:06:32","date_gmt":"2026-08-31T10:06:32","guid":{"rendered":"https:\/\/climatescience.press\/?p=467211"},"modified":"2026-08-31T03:06:35","modified_gmt":"2026-08-31T10:06:35","slug":"new-satellite-method-maps-tides-at-beach-scale-a-fresh-tool-for-tracking-sea-level-rise","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=467211","title":{"rendered":"New Satellite Method Maps Tides at Beach Scale \u2014 A Fresh Tool for Tracking Sea- Level Rise"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"485\" data-attachment-id=\"467214\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=467214\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-New-Satellite-Method-Maps-Tides-at-Beach-Scale-%E2%80%94-A-Fresh-Tool-for-Tracking-Sea-Level-Rise.jpg?fit=1168%2C784&amp;ssl=1\" 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data-image-title=\"0 New Satellite Method Maps Tides at Beach Scale \u2014 A Fresh Tool for Tracking Sea-Level Rise\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Signature: 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data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-New-Satellite-Method-Maps-Tides-at-Beach-Scale-%E2%80%94-A-Fresh-Tool-for-Tracking-Sea-Level-Rise.jpg?fit=723%2C485&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-New-Satellite-Method-Maps-Tides-at-Beach-Scale-%E2%80%94-A-Fresh-Tool-for-Tracking-Sea-Level-Rise.jpg?resize=723%2C485&#038;ssl=1\" alt=\"\" class=\"wp-image-467214\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-New-Satellite-Method-Maps-Tides-at-Beach-Scale-%E2%80%94-A-Fresh-Tool-for-Tracking-Sea-Level-Rise.jpg?resize=1024%2C687&amp;ssl=1 1024w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-New-Satellite-Method-Maps-Tides-at-Beach-Scale-%E2%80%94-A-Fresh-Tool-for-Tracking-Sea-Level-Rise.jpg?resize=300%2C201&amp;ssl=1 300w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-New-Satellite-Method-Maps-Tides-at-Beach-Scale-%E2%80%94-A-Fresh-Tool-for-Tracking-Sea-Level-Rise.jpg?resize=768%2C516&amp;ssl=1 768w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-New-Satellite-Method-Maps-Tides-at-Beach-Scale-%E2%80%94-A-Fresh-Tool-for-Tracking-Sea-Level-Rise.jpg?resize=640%2C430&amp;ssl=1 640w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-New-Satellite-Method-Maps-Tides-at-Beach-Scale-%E2%80%94-A-Fresh-Tool-for-Tracking-Sea-Level-Rise.jpg?w=1168&amp;ssl=1 1168w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><figcaption class=\"wp-element-caption\">AI generated by Grok<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>New method maps tides at much finer local scales using decades of satellite images.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Researchers from <strong>DTU Space (Technical University of Denmark)<\/strong>, in collaboration with the <strong>University of Oxford, Technical University of Munich (TUM)<\/strong>, and others, have developed a technique that extracts detailed tidal information directly from <strong>satellite photographs of coastlines.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Traditional tide gauges are often spaced 50 km or more apart, leaving large gaps. Satellite altimetry also struggles near the coast.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The new approach treats the beach itself as a giant ruler:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>It tracks the land- water boundary (shoreline position) across thousands of Landsat satellite images spanning more than 40 years.<\/li>\n\n\n\n<li>By combining the movement of that waterline with the known slope of the beach, researchers convert horizontal shoreline shifts into vertical water- level (tidal) changes.<\/li>\n\n\n\n<li>This yields tidal estimates every ~100 metres along the coast, far denser than previous methods.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tide heights are not uniform. In some places they can differ <strong>by nearly 1 metre across a single bay only a few tens of kilometres long<\/strong> (for example, New Zealand\u2019s South Taranaki Bight). These local variations matter for flood risk, coastal planning, and navigation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The method turns what was previously treated as<strong> \u201cnoise\u201d in satellite<\/strong> shoreline data into a useful signal for high- resolution tidal mapping, especially valuable in sparsely instrumented or remote coastal areas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The study was published in Communications Earth &amp; Environment (Nature portfolio). Professor Ole Baltazar Andersen of DTU Space is a co- author; Michael Hart- Davis (TUM) is the lead author.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">_____________________________________________________________________________________<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>CoastSat<\/strong> is an open- source Python toolkit (developed by<strong> Kilian Vos and colleagues at the University of New South Wales<\/strong>) that automatically extracts time series of shoreline positions from publicly available satellite imagery. It is optimized for sandy beaches and has been widely used for coastal monitoring worldwide.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Core Methodology (Step-by- Step)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Image Retrieval<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Uses Google Earth Engine to download Top- of- Atmosphere reflectance images.<\/li>\n\n\n\n<li>Supported missions: Landsat 5, 7, 8, 9 (since 1984) and Sentinel- 2 (since 2015).<\/li>\n\n\n\n<li>User defines a region of interest (polygon) and date range. Images are cropped to that area.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Pre- processing<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cloud masking (removes cloudy pixels).<\/li>\n\n\n\n<li>Pansharpening (for Landsat 7\/8\/9) to enhance spatial resolution.<\/li>\n\n\n\n<li>Down-sampling or re- projection of bands so all images have consistent resolution (typically ~10- 15 m after processing).<\/li>\n\n\n\n<li>Filtering based on a cloud- cover threshold.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Image Classification<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A supervised Multilayer Perceptron (neural network) classifier labels every pixel into one of four classes:\n<ul class=\"wp-block-list\">\n<li>Sand<\/li>\n\n\n\n<li>Water<\/li>\n\n\n\n<li>White-water (breaking waves \/ foam)<\/li>\n\n\n\n<li>Other land features (vegetation, rocks, buildings, etc.)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>The classifier was trained on thousands of manually labelled pixels from diverse beaches.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Shoreline Detection<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Computes the Modified Normalized Difference Water Index (MNDWI):<br><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" display=\"block\"><semantics style=\"color: black; background-color: transparent; font-family: sans-serif;\"><mrow style=\"color: black; background-color: transparent; font-family: sans-serif;\"><mtext style=\"color: black; background-color: transparent; font-family: sans-serif;\">MNDWI<\/mtext><mo style=\"color: black; background-color: transparent; font-family: sans-serif;\">=<\/mo><mfrac style=\"color: black; background-color: transparent; font-family: sans-serif;\"><mrow style=\"color: black; background-color: transparent; font-family: sans-serif;\"><mtext style=\"color: black; background-color: transparent; font-family: sans-serif;\">Green<\/mtext><mo style=\"color: black; background-color: transparent; font-family: sans-serif;\">\u2212<\/mo><mtext style=\"color: black; background-color: transparent; font-family: sans-serif;\">SWIR<\/mtext><\/mrow><mrow style=\"color: black; background-color: transparent; font-family: sans-serif;\"><mtext style=\"color: black; background-color: transparent; font-family: sans-serif;\">Green<\/mtext><mo style=\"color: black; background-color: transparent; font-family: sans-serif;\">+<\/mo><mtext style=\"color: black; background-color: transparent; font-family: sans-serif;\">SWIR<\/mtext><\/mrow><\/mfrac><\/mrow><annotation encoding=\"application\/x-tex\" style=\"color: black; background-color: transparent; font-family: sans-serif;\">\\text{MNDWI} = \\frac{\\text{Green} &#8211; \\text{SWIR}}{\\text{Green} + \\text{SWIR}}<\/annotation><\/semantics><\/math><\/li>\n\n\n\n<li>Applies an image- specific Otsu threshold on the MNDWI values (restricted to the sand and water classes) to optimally separate land and water.<\/li>\n\n\n\n<li>Uses a marching- squares algorithm for sub-pixel resolution contouring of the waterline. This finds the precise sand- water interface rather than just the nearest pixel edge.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Time- Series Generation<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The detected waterline (instantaneous shoreline) is intersected with a series of shore- normal transects (typically spaced every 100 m or user- defined).<\/li>\n\n\n\n<li>This produces a cross- shore position time series at each transect.<\/li>\n\n\n\n<li>Optional tidal correction can be applied later using a tide model (e.g., FES) and an estimated beach slope to convert the instantaneous waterline into a fixed-datum shoreline (e.g., mean sea level).<\/li>\n<\/ul>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Accuracy<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Horizontal accuracy is typically ~8-12 m (root-mean- square error) when validated against ground surveys.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sub- pixel waterline detection itself is on the order of ~5 m for Landsat.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Suitable for detecting changes larger than ~10- 15 m; smaller variations are generally within the noise.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Key Strengths<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fully automated and scalable to any sandy coastline with available imagery.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Provides multi- decadal records (40+ years in many places).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Open- source and designed to be usable by non-experts via Jupyter notebooks.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Limitations<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Best suited to sandy beaches (performance degrades on rocky, muddy, or heavily vegetated coasts).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Affected by cloud cover, image quality, and extreme white- water conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Instantaneous waterlines still contain tidal, wave setup, and runup effects until corrected.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>CoastSat<\/strong> is freely available on <strong>GitHub (kvos\/CoastSat)<\/strong> and underpins large regional datasets, including the Pacific Rim shoreline collection used in the recent beach- scale tidal variation study.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">_____________________________________________________________________________________<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The new beach-scale tidal method (and the underlying CoastSat shoreline data) is explicitly positioned as a useful tool for studying sea- level rise and coastline change.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Traditional tide gauges are sparse (often tens of kilometres apart) and satellite altimetry struggles close to the coast. The CoastSat- based approach fills those gaps by turning the moving waterline on the beach into a local sea-level record:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Satellite images capture the instantaneous position of the sand\u2013 water boundary.<\/li>\n\n\n\n<li>Combined with the beach slope, the horizontal movement of that waterline is converted into a vertical water-level (tidal and sea-level) signal.<\/li>\n\n\n\n<li>Because the Landsat record spans 40+ years (1984- present), researchers can examine both <strong>short- term tidal patterns and longer- term changes.<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Specific value for sea-level rise research<\/strong><\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Local tidal characterisation<\/strong><br>Accurate knowledge of local tides is essential for converting raw shoreline positions into a consistent vertical datum (e.g., mean sea level). Without it, <strong>tidal \u201cnoise\u201d<\/strong> can mask or distort true shoreline trends caused by sea- level rise, storms, or sediment processes.<\/li>\n\n\n\n<li><strong>Detecting changes in tides themselves<\/strong><br>As mean sea level rises, tidal amplitudes and phases can change (especially in shallow coastal and estuarine areas). The multi- decadal shoreline time series allow researchers to look for trends in major tidal constituents (such as the dominant M\u2082 tide) at beach scale, something previously difficult outside of well-instrumented sites.<\/li>\n\n\n\n<li><strong>Improved shoreline-change analysis<\/strong><br>Once the tidal component is properly accounted for, the remaining shoreline movement better reflects true morphological change (erosion\/accretion) driven by sea-level rise, waves, and human interventions. This is critical for projecting future coastline retreat.<\/li>\n\n\n\n<li><strong>Gap-filling in data- poor regions<\/strong><br>Many coastlines lack long-term tide gauges. The method can provide high- resolution (\u2248100 m) tidal information almost anywhere there are sandy beaches and sufficient satellite coverage, supporting better local sea-level and flood- risk assessments.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Limitations to keep in mind<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Accuracy depends on good beach- slope estimates and image quality.<\/li>\n\n\n\n<li>It works best on open sandy beaches; complex or rocky coasts are more challenging.<\/li>\n\n\n\n<li>Long-term trends in the tidal constituents extracted this way still need careful validation against traditional gauges and altimetry because of residual measurement noise and morphological changes.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In short, by treating the beach as<strong> a natural \u201ctide gauge,\u201d <\/strong>the method turns an existing global archive of satellite images into a new source of coastal water- level information, useful both for understanding present- day tides and for improving studies of how coastlines respond to rising seas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">_____________________________________________________________________________________<\/p>\n\n\n\n<p class=\"has-large-font-size wp-block-paragraph\"><strong>Beach scale tidal variations observed from satellite- derived shoreline time series<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tides can vary significantly even over short distances along the coast. Using more than 40 years of Landsat satellite images (via the CoastSat shoreline dataset), the team mapped tidal variations <strong>at ~100-metre resolution along Pacific Rim beaches.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Example results:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>In New Zealand\u2019s South Taranaki Bight (~90 km long), tidal height differed by nearly <strong>1 metre from one end of the bay to the other.<\/strong><\/li>\n\n\n\n<li>Around Christchurch, tides in Pegasus Bay were about<strong> 40 cm higher t<\/strong>han those south of the city near the Rakaia River.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Instead of treating the moving shoreline in satellite photos as noise (the usual approach when studying beach erosion), the researchers treated it as the <strong>signal.<\/strong> <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By tracking the waterline position and combining it with beach slope information, they converted horizontal shoreline shifts into vertical tidal height changes. This works even in areas without local tide gauges.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The method recovers major tidal constituents (especially the dominant M\u2082 tide) and matches well with traditional tide gauges, ocean tide models, and newer wide-swath satellite data (e.g., SWOT).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Most existing tide information is either sparse (tide gauges every 50+ km) or coarse near the coast. This approach fills those gaps at beach scale and has implications for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Local flood- risk assessment<\/li>\n\n\n\n<li>Coastal planning and engineering<\/li>\n\n\n\n<li>Improving tide models<\/li>\n\n\n\n<li>Studying long- term changes in tidal amplitudes<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The full open- access paper is available at the Nature.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Published:<\/strong> <a href=\"https:\/\/phys.org\/journals\/communications-earth-environment\/\">Communications Earth &amp; Environment<\/a>&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>DOI:<\/strong> <a href=\"https:\/\/dx.doi.org\/10.1038\/s43247-026-03943-9\" target=\"_blank\" rel=\"noopener\">10.1038\/s43247-026-03943-9<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Provided:<\/strong>&nbsp;<a href=\"https:\/\/phys.org\/partners\/technical-university-of-denmark\/\">Technical University of Denmark<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Authors:<\/strong> <a href=\"https:\/\/www.nature.com\/articles\/s43247-026-03943-9#auth-Michael_G_-Hart_Davis-Aff1\">Michael G. Hart-Davis<\/a>,&nbsp;<br><a href=\"https:\/\/www.nature.com\/articles\/s43247-026-03943-9#auth-Thomas-Monahan-Aff2\">Thomas Monahan<\/a>,&nbsp;<br><a href=\"https:\/\/www.nature.com\/articles\/s43247-026-03943-9#auth-Kilian-Vos-Aff3\">Kilian Vos<\/a>&nbsp;&amp;&nbsp;<br><a href=\"https:\/\/www.nature.com\/articles\/s43247-026-03943-9#auth-Ole_B_-Andersen-Aff4\">Ole B. Andersen<\/a>&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Abstract<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Coastal tidal dynamics play a crucial role in a variety of biogeophysical processes, ranging from compound flooding to sediment transport. Satellite altimetry has revolutionized our understanding of ocean tides, but coastal regions remain challenging for satellite altimetry-based observations. In recent years, important efforts have been made to produce shoreline measurements from satellite optical imagery. These datasets raise the question of whether shoreline observations can resolve tidal dynamics at fine coastal scales. Here, we show that shoreline measurements provide fine-scale insights into tidal characteristics, demonstrating variability at beach scales across the Pacific Rim. We explore how both harmonic analysis and response-based methods can be applied to these data to study a range of tidal constituents. Our results are contrasted with in situ measurements and state-of-the-art models as well as with wide-swath satellite observations. We demonstrate that satellite-derived shoreline measurements are a valuable resource for tidal research, particularly for model validation and the study of tidal constituent variability in the coastal zone.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>New method maps tides at much finer local scales using decades of satellite images. Researchers from DTU Space (Technical University of Denmark), in collaboration with the University of Oxford, Technical University of Munich (TUM), and others, have developed a technique that extracts detailed tidal information directly from satellite photographs of coastlines. Traditional tide gauges are [&hellip;]<\/p>\n","protected":false},"author":121246920,"featured_media":467214,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_seo_schema_type":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_wpcom_ai_launchpad_first_post":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[],"class_list":["post-467211","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","fallback-thumbnail"],"jetpack_publicize_connections":[],"jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1XxF","jetpack-related-posts":[{"id":278939,"url":"https:\/\/climatescience.press\/?p=278939","url_meta":{"origin":467211,"position":0},"title":"Have Sea Level Rise Data Been Faked? Altimetry \u2018Corrects\u2019 Non-Trends To Show Rapid Acceleration","author":"uwe.roland.gross","date":"09\/15\/2023","format":false,"excerpt":"A stable current global sea level record has apparently been \u201ccorrected\u201d to show accelerated rise since the 1990s.","rel":"","context":"In \"accelerated rise\"","block_context":{"text":"accelerated rise","link":"https:\/\/climatescience.press\/?tag=accelerated-rise"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/09\/00modernsealev.jpg?fit=1200%2C836&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/09\/00modernsealev.jpg?fit=1200%2C836&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/09\/00modernsealev.jpg?fit=1200%2C836&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/09\/00modernsealev.jpg?fit=1200%2C836&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/09\/00modernsealev.jpg?fit=1200%2C836&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":450056,"url":"https:\/\/climatescience.press\/?p=450056","url_meta":{"origin":467211,"position":1},"title":"Wrong, ScienceAlert: Sea Level \u2018Acceleration\u2019 Isn\u2019t What the Measured Data Show","author":"uwe.roland.gross","date":"06\/13\/2026","format":false,"excerpt":"The ScienceAlert article \u201cSea Level Rise Is Accelerating, And We Now Know The Biggest Reason Why\u201d claims that sea-level rise is not only accelerating but that scientists have now \u201cclosed the budget\u201d and identified ocean thermal expansion as the dominant driver. This is false. Direct, long-term tide gauge measurements around\u2026","rel":"","context":"In \"actual tide gauge measurements\"","block_context":{"text":"actual tide gauge measurements","link":"https:\/\/climatescience.press\/?tag=actual-tide-gauge-measurements"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/06\/0-Copilot-sunny-coastal-beach.png?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/06\/0-Copilot-sunny-coastal-beach.png?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/06\/0-Copilot-sunny-coastal-beach.png?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/06\/0-Copilot-sunny-coastal-beach.png?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/06\/0-Copilot-sunny-coastal-beach.png?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":407791,"url":"https:\/\/climatescience.press\/?p=407791","url_meta":{"origin":467211,"position":2},"title":"False, Yahoo News, Cape Coral Isn\u2019t Sinking","author":"uwe.roland.gross","date":"10\/12\/2025","format":false,"excerpt":"Yahoo News\u2019 reprinted an item from The Cool Down, titled\u00a0\u201cExperts warn that beloved US coastal town could soon vanish off map entirely: \u2018I\u2019m scared,\u2019\u201d\u00a0which claims Cape Coral, Florida will disappear soon due to climate change induced sea level rise. This claim is absolutely false. Actual sea level rise data is\u2026","rel":"","context":"In \"Cape Coral\"","block_context":{"text":"Cape Coral","link":"https:\/\/climatescience.press\/?tag=cape-coral"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/10\/0AQM1OMi-Xtf95Ty8JTep2L9nJdggPaGjYLHqTmkOWpbEGAss9wgemxhUxzOg_x1OYg1REeK3R6TPAFWlt6kh-jdEz3c6S-oikI0ZhW8nvZZp2M5Yh-FiuRd40f7Ee4qi-1.jpeg?fit=1200%2C665&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/10\/0AQM1OMi-Xtf95Ty8JTep2L9nJdggPaGjYLHqTmkOWpbEGAss9wgemxhUxzOg_x1OYg1REeK3R6TPAFWlt6kh-jdEz3c6S-oikI0ZhW8nvZZp2M5Yh-FiuRd40f7Ee4qi-1.jpeg?fit=1200%2C665&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/10\/0AQM1OMi-Xtf95Ty8JTep2L9nJdggPaGjYLHqTmkOWpbEGAss9wgemxhUxzOg_x1OYg1REeK3R6TPAFWlt6kh-jdEz3c6S-oikI0ZhW8nvZZp2M5Yh-FiuRd40f7Ee4qi-1.jpeg?fit=1200%2C665&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/10\/0AQM1OMi-Xtf95Ty8JTep2L9nJdggPaGjYLHqTmkOWpbEGAss9wgemxhUxzOg_x1OYg1REeK3R6TPAFWlt6kh-jdEz3c6S-oikI0ZhW8nvZZp2M5Yh-FiuRd40f7Ee4qi-1.jpeg?fit=1200%2C665&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/10\/0AQM1OMi-Xtf95Ty8JTep2L9nJdggPaGjYLHqTmkOWpbEGAss9wgemxhUxzOg_x1OYg1REeK3R6TPAFWlt6kh-jdEz3c6S-oikI0ZhW8nvZZp2M5Yh-FiuRd40f7Ee4qi-1.jpeg?fit=1200%2C665&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":260561,"url":"https:\/\/climatescience.press\/?p=260561","url_meta":{"origin":467211,"position":3},"title":"Flawed Alarmism: Coastal Cliff Erosion in California and the Inaccuracies of Climate Change Projections","author":"uwe.roland.gross","date":"06\/04\/2023","format":false,"excerpt":"Anthony pointed out how the article is misleading, primarily relying on\u00a0projections of computer models\u00a0for sea level rise.","rel":"","context":"In \"California\"","block_context":{"text":"California","link":"https:\/\/climatescience.press\/?tag=california"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0bigs-cliff-erosion-warning-sign-at-san-diego-california-beach-E1-Large.webp?fit=1200%2C777&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0bigs-cliff-erosion-warning-sign-at-san-diego-california-beach-E1-Large.webp?fit=1200%2C777&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0bigs-cliff-erosion-warning-sign-at-san-diego-california-beach-E1-Large.webp?fit=1200%2C777&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0bigs-cliff-erosion-warning-sign-at-san-diego-california-beach-E1-Large.webp?fit=1200%2C777&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0bigs-cliff-erosion-warning-sign-at-san-diego-california-beach-E1-Large.webp?fit=1200%2C777&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":370439,"url":"https:\/\/climatescience.press\/?p=370439","url_meta":{"origin":467211,"position":4},"title":"You Almost Got It Right, New York Post, Subsidence Is Sinking Coastal Cities, Climate Change Isn\u2019t Raising Seas","author":"uwe.roland.gross","date":"03\/17\/2025","format":false,"excerpt":"A recent\u00a0New York Post\u00a0(NYP) article,\u00a0\u201cScary Map Reveals Major Coastal Cities Rapidly Sinking into Sea\u201d, reports that a study from NASA claims that several major coastal cities are sinking at alarming rates due to a combination of land subsidence and rising sea levels. The NYP specifically mentions sea level problems in\u2026","rel":"","context":"In \"Climate change\"","block_context":{"text":"Climate change","link":"https:\/\/climatescience.press\/?tag=climate-change"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/03\/0141338089.webp?fit=1200%2C768&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/03\/0141338089.webp?fit=1200%2C768&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/03\/0141338089.webp?fit=1200%2C768&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/03\/0141338089.webp?fit=1200%2C768&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/03\/0141338089.webp?fit=1200%2C768&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":427737,"url":"https:\/\/climatescience.press\/?p=427737","url_meta":{"origin":467211,"position":5},"title":"Wrong, Oceanographic Magazine, Sea Level Rise in Hawaii Is Not a Looming Catastrophe","author":"uwe.roland.gross","date":"02\/24\/2026","format":false,"excerpt":"Oceanographic Magazine (OM) recently published the article \u201cMost Hawaiins are already feeling the affects of sea level rise\u201d by Eva Cahill on February 17, 2026, asserting that Hawaii residents are already experiencing the impacts of rising seas and that it is accelerating. This framing is false, unsupported by local data.\u2026","rel":"","context":"In \"Hawaii\"","block_context":{"text":"Hawaii","link":"https:\/\/climatescience.press\/?tag=hawaii"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0oahu1.png?fit=670%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0oahu1.png?fit=670%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/02\/0oahu1.png?fit=670%2C1200&ssl=1&resize=525%2C300 1.5x"},"classes":[]}],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-New-Satellite-Method-Maps-Tides-at-Beach-Scale-%E2%80%94-A-Fresh-Tool-for-Tracking-Sea-Level-Rise.jpg?fit=1168%2C784&ssl=1","_links":{"self":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/467211","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/users\/121246920"}],"replies":[{"embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=467211"}],"version-history":[{"count":42,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/467211\/revisions"}],"predecessor-version":[{"id":467255,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/467211\/revisions\/467255"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/media\/467214"}],"wp:attachment":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=467211"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=467211"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=467211"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}