Airborne gravimetry mapping of coastal and glacial regions in Norway with implications for the next Nordic geoid model

Airborne gravimetry mapping of coastal and glacial regions in Norway with implications for the next Nordic geoid model | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Airborne gravimetry mapping of coastal and glacial regions in Norway with implications for the next Nordic geoid model Bjørnar Dale, René Forsberg, Bjarke Nilsson, Tim Enzlberger Jensen, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9190249/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract We present results from an airborne gravity campaign conducted in Norway during December 2024 by DTU Space on behalf of the Norwegian Mapping Authority (NMA). One part of the campaign covered the southwestern coast, mapping the marginal land-sea zone to support the realisation of one common future height system for land and sea areas. The second part covered Jostedalsbreen, a region experiencing large gravity variations due to rough topography including high mountains, glaciers and deep fjords. Root-mean-square-error estimates of crossover points show 1.63 mGal and 1.35 mGal, after modelling residual temperature errors in the iMAR system, in the coastal zone and Jostedalsbreen, respectively. Optimum full-width-half-maximum filtering length is found as 70 and 40 seconds for the two regions, respectively. Comparison with existing (DTU15 and DTU21) global altimetry-derived gravity in the sea area shows standard deviations in the order of 3.66 to 3.28 mGal. Comparison with a preliminary DTU26 altimetry model, including two years of data from the Surface Water and Ocean Topography (SWOT) mission, shows a standard deviation of 2.85 mGal. Outliers in marine gravity data are detected based on comparison with the airborne gravity data and DTU26. The long-wavelength pattern of the residuals between altimetry and marine gravity data coincides with existing questionable geostrophic currents based on geodetic mean dynamic topography models. This indicates erroneous long-wavelength signal in the underlying gravimetric geoids. Physical Geography airborne gravimetry strapdown gravimetry coastal gravity field modelling SWOT Full Text Additional Declarations The authors declare no competing interests. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-9190249","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":611415164,"identity":"13a4994c-2e89-42c9-ae48-c5ad85816042","order_by":0,"name":"Bjørnar Dale","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA0klEQVRIiWNgGAWjYBACAyCWYKiA8nhAxBmitMBU8SQQq4WxjRQt5uyHH974Oa8uj7/98AGGtz8OM/CdOYBfi2VPmrFl77bDxRJn0hIY5yQcZpA820DAYQcSzCR4tx1IbLjBY8DMA9RicJ6QX84//yb5d05d4vwb/B+I1HIjx0yat4E5ccMNHgaIFkIOs5zxptha5tjhYsMzaQYH56Sl80gS8r45f/rGm29q6vLkjh9++OCNjbUc35kEAi6DArAykPE8xKmHaRkFo2AUjIJRgBUAAJCsSOTBomfaAAAAAElFTkSuQmCC","orcid":"https://orcid.org/0009-0003-1993-7389","institution":"Technical University of Denmark","correspondingAuthor":true,"prefix":"","firstName":"Bjørnar","middleName":"","lastName":"Dale","suffix":""},{"id":611415165,"identity":"d4d3f85c-a3b7-4ab4-b9fa-cf349798eed1","order_by":1,"name":"René Forsberg","email":"","orcid":"https://orcid.org/0000-0002-7288-9545","institution":"Technical University of Denmark","correspondingAuthor":false,"prefix":"","firstName":"René","middleName":"","lastName":"Forsberg","suffix":""},{"id":611415166,"identity":"e31bb289-5706-467b-86b1-77673ca1dcc5","order_by":2,"name":"Bjarke Nilsson","email":"","orcid":"https://orcid.org/0000-0002-0784-4308","institution":"Technical University of Denmark","correspondingAuthor":false,"prefix":"","firstName":"Bjarke","middleName":"","lastName":"Nilsson","suffix":""},{"id":611415167,"identity":"069939a9-19a2-415c-a18b-1b534adce43a","order_by":3,"name":"Tim Enzlberger Jensen","email":"","orcid":"https://orcid.org/0000-0003-0906-242X","institution":"Technical University of Denmark","correspondingAuthor":false,"prefix":"","firstName":"Tim","middleName":"Enzlberger","lastName":"Jensen","suffix":""},{"id":611415168,"identity":"c841a5b6-9352-436e-a021-774a7538e153","order_by":4,"name":"Ole B. 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