{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,10]],"date-time":"2026-04-10T15:22:39Z","timestamp":1775834559464,"version":"3.50.1"},"reference-count":42,"publisher":"Copernicus GmbH","issue":"1","license":[{"start":{"date-parts":[[2016,6,14]],"date-time":"2016-06-14T00:00:00Z","timestamp":1465862400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Earth Syst. Sci. Data"],"abstract":"<jats:p>Abstract. Regional\/national-scale information on coastline rates of change and trends is extremely valuable, but these studies are scarce. A widely accepted standardized methodology for analysing long-term coastline change has been difficult to achieve, but it is essential to conduct an integrated and holistic approach to coastline evolution and hence support coastal management actions. Additionally, databases providing knowledge on coastline evolution are of key importance to support both coastal management experts and users.The main objective of this work is to present the first systematic, national-scale and consistent long-term coastline evolution data of Portuguese mainland low-lying sandy coasts.The methodology used quantifies coastline evolution using a unique and robust coastline indicator (the foredune toe), which is independent of short-term changes.The dataset presented comprises (1)\u00a0two polyline sets, mapping the 1958 and 2010 sandy beach\u2013dune system coastline, both optimized for working at 1\u2009:\u200950\u202f000 scale or smaller; (2)\u00a0one polyline set representing long-term change rates between 1958 and 2010, each estimated at 250\u202fm; and (3)\u00a0a table with minimum, maximum and mean of evolution rates for sandy beach\u2013dune system coastline. All science data produced here are openly accessible at https:\/\/doi.pangaea.de\/10.1594\/PANGAEA.859136 and can be used in other studies.Results show beach erosion as the dominant trend, with a mean change rate of \u22120.24\u202f\u00b1\u20090.01\u202fm\u202fyear\u22121 for all mainland Portuguese beach\u2013dune systems. Although erosion is dominant, this evolution is variable in signal and magnitude in different coastal sediment cells and also within each cell. The most relevant beach erosion issues were found in the coastal stretches of Espinho\u2013Torreira and Costa Nova\u2013Praia de Mira, Cova da Gala\u2013Leirosa, and Cova do Vapor\u2013Costa da Caparica. The coastal segments Minho River\u2013Nazar\u00e9 and Costa da Caparica adjacent to the coast exhibit a history of major human interventions interfering with the coastal system, many of which originated and maintained a sediment deficit. In contrast, the coastal segments Troia\u2013Sines and Sines\u2013Cape S. Vicente have experienced less intervention and show stable or moderate accretion behaviour.<\/jats:p>","DOI":"10.5194\/essd-8-265-2016","type":"journal-article","created":{"date-parts":[[2016,6,14]],"date-time":"2016-06-14T07:47:39Z","timestamp":1465890459000},"page":"265-278","source":"Crossref","is-referenced-by-count":90,"title":["Coastline evolution of Portuguese low-lying sandy coast in the last 50 years: an integrated approach"],"prefix":"10.5194","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9947-6724","authenticated-orcid":false,"given":"Cristina","family":"Ponte Lira","sequence":"first","affiliation":[]},{"given":"Ana","family":"Nobre Silva","sequence":"additional","affiliation":[]},{"given":"Rui","family":"Taborda","sequence":"additional","affiliation":[]},{"given":"Cesar","family":"Freire de Andrade","sequence":"additional","affiliation":[]}],"member":"3145","published-online":{"date-parts":[[2016,6,14]]},"reference":[{"key":"ref1","unstructured":"Abecassis, F., Castanho, J., and Matias, M.: Coastal regime. 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