{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:48:52Z","timestamp":1760150932746,"version":"build-2065373602"},"reference-count":65,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2022,1,17]],"date-time":"2022-01-17T00:00:00Z","timestamp":1642377600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/2.zoppoz.workers.dev:443\/https\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Salinity is one of the oldest parameters being measured in oceanography and one of the most important to study in the context of climate change. However, its quantification by satellite remote sensing has been a relatively recent achievement. Currently, after over ten years of data gathering, there are still many challenges in quantifying salinity from space, especially when it is intended for coastal environments study. That is mainly due to the spatial resolution of the available products. Recently, a new higher resolution (5 km) L4 SMOS sea surface salinity (SSS) product was developed by the Barcelona Expert Center (BEC). In this study, the quality of this product was tested along the Western Iberian Coast through its comparison with in situ observations and modelled salinity estimates (CMEMS IBI Ocean Reanalysis system). Moreover, several parameters such as the temperature and depth of in situ measurements were tested to identify the variables or processes that induced higher errors in the product or influenced its performance. Lastly, a seasonal and interannual analysis was conducted considering data between 2011 to 2019 to test the product as a potential tool for long-term studies. The results obtained in the present analysis showed a high potential of using the L4 BEC SSS SMOS product in extended temporal and spatial analyses along the Portuguese coast. A good correlation between the satellite and the in situ datasets was observed, and the satellite dataset showed lower errors in retrieving coastal salinities than the oceanic model. Overall, the distance to the coast and the closest rivers were the factors that most influenced the quality of the product. The present analysis showed that great progress has been made in deriving coastal salinity over the years and that the SMOS SSS product is a valuable contribution to worldwide climatological studies. In addition, these results reinforce the need to continue developing satellite remote sensing products as a global and cost-effective methodology for long-term studies.<\/jats:p>","DOI":"10.3390\/rs14020423","type":"journal-article","created":{"date-parts":[[2022,1,17]],"date-time":"2022-01-17T20:49:21Z","timestamp":1642452561000},"page":"423","update-policy":"https:\/\/2.zoppoz.workers.dev:443\/https\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Evaluation of SMOS L4 Sea Surface Salinity Product in the Western Iberian Coast"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/2.zoppoz.workers.dev:443\/https\/orcid.org\/0000-0001-7252-1241","authenticated-orcid":false,"given":"Beatriz","family":"Biguino","sequence":"first","affiliation":[{"name":"MARE\u2014Marine and Environmental Sciences Centre, Faculdade de Ci\u00eancias, Universidade de Lisboa, 1749-016 Lisboa, Portugal"},{"name":"Instituto Hidrogr\u00e1fico, Rua das Trinas 49, 1249-093 Lisboa, Portugal"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/2.zoppoz.workers.dev:443\/https\/orcid.org\/0000-0002-3178-1554","authenticated-orcid":false,"given":"Estrella","family":"Olmedo","sequence":"additional","affiliation":[{"name":"Barcelona Expert Center, Institut de Ci\u00e8ncies del Mar, CSIC, Passeig Mar\u00edtim de la Barceloneta, 37\u201349, E-08003 Barcelona, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/2.zoppoz.workers.dev:443\/https\/orcid.org\/0000-0002-2670-8125","authenticated-orcid":false,"given":"Afonso","family":"Ferreira","sequence":"additional","affiliation":[{"name":"MARE\u2014Marine and Environmental Sciences Centre, Faculdade de Ci\u00eancias, Universidade de Lisboa, 1749-016 Lisboa, 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Coast. Res."},{"key":"ref_2","unstructured":"(2021, September 16). NASA\u2014With a Pinch of Salt, Available online: https:\/\/2.zoppoz.workers.dev:443\/https\/climate.nasa.gov\/news\/58\/with-a-pinch-of-salt\/."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Talley, L.D., Pickard, G.L., Emery, W.J., and Swift, J.H. (2011). Descriptive Physical Oceanography. An Introduction, Elsevier Ltd.. [6th ed.].","DOI":"10.1016\/B978-0-7506-4552-2.10001-0"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Singh, V.P., Singh, P., and Haritashya, U.K. (2011). Salinity. Encyclopedia of Snow, Ice and Glaciers, Springer.","DOI":"10.1007\/978-90-481-2642-2"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1949","DOI":"10.1175\/1520-0485(2004)034<1949:TEOSOT>2.0.CO;2","article-title":"The effect of salinity on the wind-driven circulation and the thermal structure of the upper ocean","volume":"34","author":"Fedorov","year":"2004","journal-title":"J. Phys. Oceanogr."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"228","DOI":"10.1038\/nclimate2946","article-title":"Keeping the lights on for global ocean salinity observation","volume":"6","author":"Durack","year":"2016","journal-title":"Nat. Clim. Chang."},{"key":"ref_7","unstructured":"(2021, September 17). ESA\u2014New Maps of Salinity Reveal the Impact of Climate Variability on Oceans. Available online: https:\/\/2.zoppoz.workers.dev:443\/https\/esa.int\/Applications\/Observing_the_Earth\/Space_for_our_climate\/New_maps_of_salinity_reveal_the_impact_of_climate_variability_on_oceans."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"44","DOI":"10.5670\/oceanog.1995.17","article-title":"Sea Surface Salinity: The Next Remote Sensing Challenge","volume":"8","author":"Lagerloef","year":"1995","journal-title":"Oceanography"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"649","DOI":"10.1109\/JPROC.2009.2033096","article-title":"SMOS: The Challenging Sea Surface Salinity Measurement from Space","volume":"98","author":"Font","year":"2010","journal-title":"Proc. IEEE"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"243","DOI":"10.3389\/fmars.2019.00243","article-title":"Satellite Salinity Observing System: Recent Discoveries and the Way Forward","volume":"6","author":"Vinogradova","year":"2019","journal-title":"Front. Mar. Sci."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"111769","DOI":"10.1016\/j.rse.2020.111769","article-title":"Sea surface salinity estimates from spaceborne L-band radiometers: An overview of the first decade of observation (2010\u20132019)","volume":"242","author":"Reul","year":"2020","journal-title":"Remote Sens. Environ."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1932","DOI":"10.1029\/2019JC014937","article-title":"Comparison of Satellite-Derived Sea Surface Salinity Products from SMOS, Aquarius, and SMAP","volume":"124","author":"Bao","year":"2019","journal-title":"J. Geophys Res. Ocean."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"102478","DOI":"10.1016\/j.pocean.2020.102478","article-title":"How well do we know ocean salinity and its changes?","volume":"190","author":"Stammer","year":"2021","journal-title":"Prog. Oceanogr."},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Guimbard, S., Reul, N., Sabia, R., Herl\u00e9dan, S., Hanna, Z.E.K., Pioll\u00e9, J.F., Paul, F., Lee, T., Schanze, J.J., and Bingham, F.M. (2021). The salinity pilot-mission exploitation platform (Pi-mep): A hub for validation and exploitation of satellite sea surface salinity data. Remote Sens., 13.","DOI":"10.3390\/rs13224600"},{"key":"ref_15","unstructured":"Olmedo, E., Campuzano, F., Turiel, A., Oliveira, P.B., and Ang\u00e9lico, M.M. (2019, January 23\u201325). SMOS Sea Surface Salinity contribution to the Land-Marine Boundary Development and Analysis (LAMBDA) project. Proceedings of the Atlantic form Space Workshop, Southampton, UK."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"103190","DOI":"10.1016\/j.jmarsys.2019.103190","article-title":"Eastern Mediterranean salinification observed in satellite salinity from SMAP mission","volume":"198","author":"Grodsky","year":"2019","journal-title":"J. Mar. Syst."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Vazquez-Cuervo, J., Gomez-Valdes, J., Bouali, M., Miranda, L.E., Van der Stocken, T., Tang, W., and Gentemann, C. (2019). Using saildrones to validate satellite-derived sea surface salinity and sea surface temperature along the California\/Baja coast. Remote Sens., 11.","DOI":"10.20944\/preprints201905.0309.v1"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"3064","DOI":"10.1109\/JSTARS.2017.2685690","article-title":"Improvements on Calibration and Image Reconstruction of SMOS for Salinity Retrievals in Coastal Regions","volume":"10","author":"Olmedo","year":"2017","journal-title":"IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Akter, R., Asik, T.Z., Sakib, M., Akter, M., Sakib, M.N., Al Azad, A.S.M.A., Maruf, M., Haque, A., and Rahman, M.M. (2019). The Dominant Climate Change Event for Salinity Intrusion in the GBM Delta. Climate, 7.","DOI":"10.3390\/cli7050069"},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Sotillo, M.G., Campuzano, F., Guihou, K., Lorente, P., Olmedo, E., Matulka, A., Santos, F., Amo-Baladr\u00f3n, M.A., and Novellino, A. (2021). River freshwater contribution in operational ocean models along the european atlantic fa\u00e7ade: Impact of a new river discharge forcing data on the cmems ibi regional model solution. J. Mar. Sci. Eng., 9.","DOI":"10.3390\/jmse9040401"},{"key":"ref_21","unstructured":"Baladr\u00f3n, A.A., Levier, B., and Sotillo, M.G. (2021, October 25). Product User Manual for Atlantic-Iberian Biscay Irish-Ocean Physics Reanalysis Product IBI_MULTIYEAR_PHY_005_002. Available online: https:\/\/2.zoppoz.workers.dev:443\/https\/resources.marine.copernicus.eu\/product-detail\/IBI_MULTIYEAR_PHY_005_002\/INFORMATION."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"857","DOI":"10.5194\/essd-13-857-2021","article-title":"Nine years of SMOS sea surface salinity global maps at the Barcelona Expert Center","volume":"13","author":"Olmedo","year":"2021","journal-title":"Earth Syst. Sci. Data"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"9","DOI":"10.1016\/j.ecolind.2019.03.045","article-title":"Partitioning the ocean using dense time series of Earth Observation data. Regions and natural boundaries in the Western Iberian Peninsula","volume":"103","author":"Mantas","year":"2019","journal-title":"Ecol. Indic."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1016\/j.pocean.2007.04.021","article-title":"Physical oceanography of the western Iberia ecosystem: Latest views and challenges","volume":"74","author":"Relvas","year":"2007","journal-title":"Prog. Oceanogr."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"4980","DOI":"10.1002\/2015JC010758","article-title":"On the year-to-year changes of the Iberian Poleward Current","volume":"120","author":"Peliz","year":"2015","journal-title":"J. Geophys. Res. Ocean"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"61","DOI":"10.1016\/S0924-7963(02)00076-3","article-title":"Fronts, jets, and counter-flows in the Western Iberian upwelling system","volume":"35","author":"Peliz","year":"2002","journal-title":"J. Mar. Syst."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"243","DOI":"10.1016\/j.scitotenv.2017.03.046","article-title":"Why coastal upwelling is expected to increase along the western Iberian Peninsula over the next century?","volume":"592","author":"Sousa","year":"2017","journal-title":"Sci. Total Environ."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1182","DOI":"10.1016\/j.dsr2.2006.04.011","article-title":"Water mass circulation on the continental shelf of the Gulf of C\u00e1diz","volume":"53","author":"Delgado","year":"2006","journal-title":"Deep Res. Part II Top. Stud. Oceanogr."},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Criado-Aldeanueva, F., Garcia-Lafuente, J., Navarro, G., and Ruiz, J. (2009). Seasonal and interannual variability of the surface circulation in the eastern Gulf of Cadiz (SW Iberia). J. Geophys. Res. Ocean, 114.","DOI":"10.1029\/2008JC005069"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"621","DOI":"10.1016\/j.dsr.2004.11.005","article-title":"Winter upper ocean circulation in the Western Iberian Basin\u2014Fronts, Eddies and Poleward Flows: An overview","volume":"52","author":"Peliz","year":"2005","journal-title":"Deep Res. Part I Oceanogr. Res. Pap."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"103","DOI":"10.1016\/j.jmarsys.2006.11.003","article-title":"Coupled ocean wind and sea surface temperature patterns off the western Iberian Peninsula","volume":"68","author":"Relvas","year":"2007","journal-title":"J. Mar. Syst."},{"key":"ref_32","unstructured":"(2021, September 23). IPMA\u2014E em Portugal O Clima Est\u00e1 a Mudar?. Available online: https:\/\/2.zoppoz.workers.dev:443\/https\/www.ipma.pt\/pt\/educativa\/faq\/climatologia\/faqdetail.html?f=\/pt\/educativa\/faq\/climatologia\/faq_0004.html."},{"key":"ref_33","unstructured":"(2021, August 26). IPMA\u2014Clima de Portugal Continental. Available online: https:\/\/2.zoppoz.workers.dev:443\/https\/www.ipma.pt\/pt\/educativa\/tempo.clima\/index.jsp?page=clima.pt.xml."},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Campuzano, F., Santos, F., Ramos de Oliveira, A.I., Simionesei, L., Fernandes, R., Brito, D., Olmedo, E., Turiel, A., Alba, M., and Novellino, A. (2020, January 4\u20138). Framework for improving land boundary conditions in regional ocean products. Proceedings of the EGU General Assembly, Online.","DOI":"10.5194\/egusphere-egu2020-17977"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"172","DOI":"10.1016\/j.rse.2013.09.018","article-title":"New blending algorithm to synergize ocean variables: The case of SMOS sea surface salinity maps","volume":"146","author":"Umbert","year":"2014","journal-title":"Remote Sens. Environ."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"15501","DOI":"10.1088\/1751-8113\/41\/1\/015501","article-title":"Microcanonical multifractal formalism\u2014A geometrical approach to multifractal systems: Part I. Singularity analysis","volume":"41","author":"Turiel","year":"2007","journal-title":"J. Phys. A Math. Theor."},{"key":"ref_37","first-page":"1","article-title":"Microcanonical multifractal formalism: Application to the estimation of ocean surface velocities","volume":"112","author":"Turiel","year":"2007","journal-title":"J. Geophys Res. Ocean"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1029\/2007GL030823","article-title":"Common turbulent signature in sea surface temperature and chlorophyll maps","volume":"34","author":"Nieves","year":"2007","journal-title":"Geophys. Res. Lett."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"246","DOI":"10.1016\/j.rse.2016.02.038","article-title":"Improving time and space resolution of SMOS salinity maps using multifractal fusion","volume":"180","author":"Olmedo","year":"2016","journal-title":"Remote Sens. Environ."},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Gonz\u00e1lez-Gambau, V., Turiel, A., Gonz\u00e1lez-Haro, C., Mart\u00ednez, J., Olmedo, E., Oliva, R., and Mart\u00edn-Neira, M. (2020). Triple collocation analysis for two error-correlated datasets: Application to l-band brightness temperatures over land. Remote Sens., 12.","DOI":"10.3390\/rs12203381"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"5525","DOI":"10.1109\/TGRS.2018.2819240","article-title":"Singularity Power Spectra: A Method to Assess Geophysical Consistency of Gridded Products\u2014Application to Sea-Surface Salinity Remote Sensing Maps","volume":"56","author":"Hoareau","year":"2018","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"403","DOI":"10.1016\/j.rse.2015.07.018","article-title":"Validation of standard and alternative satellite ocean-color chlorophyll products off Western Iberia","volume":"168","author":"Brito","year":"2015","journal-title":"Remote Sens. Environ."},{"key":"ref_43","unstructured":"Martin, M., Fiedler, E., Roberts-Jones, J., Blockley, E., McLaren, A., and Good, S. (2021, October 25). Product User Manual for OSTIA Near Real Time Level 4 SST Products over the Global Ocean SST-GLO-SST-L4-NRT-OBSERVATIONS-010-001. Available online: https:\/\/2.zoppoz.workers.dev:443\/https\/cupdf.com\/document\/product-user-manual-for-ostia-near-real-time-level-4-sst-product-user-manual.html."},{"key":"ref_44","unstructured":"UK Met Office (2021, September 27). OSTIA L4 SST Analysis (GDS2). Ver. 2.0, Available online: https:\/\/2.zoppoz.workers.dev:443\/https\/doi.org\/10.5067\/GHOST-4FK02."},{"key":"ref_45","first-page":"328","article-title":"A Practical Handbook of Seawater Analysis","volume":"167","author":"Strickland","year":"1972","journal-title":"Fish. Res. Board Can. Ott. Bull."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"31","DOI":"10.1016\/S0003-2670(00)88444-5","article-title":"A modified single solution method for the determination of phosphate in natural waters","volume":"27","author":"Murphy","year":"1962","journal-title":"Anal. Chim. Acta"},{"key":"ref_47","first-page":"17","article-title":"Chlorophyll a: Determination by spectroscopic methods","volume":"30","author":"Aminot","year":"2001","journal-title":"ICES Tech. Mar. Environ. Sci."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1016\/S0015-3796(17)30778-3","article-title":"New spectrophotometric equations for determining chlorophylls a, b, c1 and c2 in higher plants, algae and natural phytoplankton","volume":"167","author":"Jeffrey","year":"1975","journal-title":"Biochem Physiol. Pflanz."},{"key":"ref_49","first-page":"126","article-title":"A Non-Parametric Approach to the Change-Point Problem","volume":"28","author":"Pettitt","year":"1979","journal-title":"J. R Stat. Soc. Ser. C (Appl. Stat.)"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"763","DOI":"10.1007\/s00477-015-1041-5","article-title":"The importance of prewhitening in change point analysis under persistence","volume":"30","author":"Serinaldi","year":"2016","journal-title":"Stoch Environ. Res. Risk Assess."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"4540","DOI":"10.5897\/AJAR12.650","article-title":"Trend and change-point detection for the annual stream-flow series of the Karun River at the Ahvaz hydrometric station","volume":"7","author":"Salarijazi","year":"2012","journal-title":"Afr. J. Agric. Res."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"5125","DOI":"10.1007\/s11269-014-0798-5","article-title":"A New Method of Change Point Detection Using Variable Fuzzy Sets Under Environmental Change","volume":"28","author":"Li","year":"2014","journal-title":"Water Resour. Manag."},{"key":"ref_53","doi-asserted-by":"crossref","unstructured":"Vazquez-Cuervo, J., Fournier, S., Dzwonkowski, B., and Reager, J. (2018). Intercomparison of in-situ and remote sensing salinity products in the Gulf of Mexico, a river-influenced system. Remote Sens., 10.","DOI":"10.3390\/rs10101590"},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"5449","DOI":"10.1002\/2014JC010040","article-title":"Impact of assimilating surface salinity from SMOS on ocean circulation estimates","volume":"119","author":"Kohl","year":"2014","journal-title":"J. Geophys. Res. Ocean"},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"587","DOI":"10.1109\/LGRS.2016.2637440","article-title":"Land Contamination Analysis of SMOS Brightness Temperature Error Near Coastal Areas","volume":"14","author":"Li","year":"2017","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_56","doi-asserted-by":"crossref","unstructured":"Dinnat, E.P., Boutin, J., Yin, X., and Le Vine, D.M. (2014, January 24\u201327). Inter-comparison of SMOS and aquarius Sea Surface Salinity: Effects of the dielectric constant and vicarious calibration. Proceedings of the 2014 13th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad), Pasadena, CA, USA.","DOI":"10.1109\/MicroRad.2014.6878907"},{"key":"ref_57","unstructured":"Moita, M.T. (2001). Estrutura, Variabilidade e Din\u00e2mica do Fitopl\u00e2ncton na Costa de Portugal Continental. [Ph.D. Thesis, Faculdade de Ci\u00eancias da Universidade de Lisboa]."},{"key":"ref_58","unstructured":"Campuzano, F., Juliano, M., Ang\u00e9lico, M.M., Oliveira, P., and Neves, R. (2018, January 19\u201320). Western iberia sea surface salinity patterns due to land inputs. Proceedings of the 5a Jornadas da Engenharia Hidrogr\u00e1fica, Lisboa, Portugal."},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"L07602","DOI":"10.1029\/2011GL046757","article-title":"What governs the North Atlantic salinity maximum in a global GCM?","volume":"38","author":"Qu","year":"2011","journal-title":"Geophys. Res. Lett."},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"40","DOI":"10.5670\/oceanog.2015.04","article-title":"A river of salt","volume":"28","author":"Schmitt","year":"2015","journal-title":"Oceanography"},{"key":"ref_61","first-page":"50","article-title":"WORLD OCEAN ATLAS 2018 Volume 2: Salinity","volume":"82","author":"Zweng","year":"2019","journal-title":"NOAA Atlas NESDIS"},{"key":"ref_62","first-page":"421","article-title":"Seasonal and year-to-year variations in surface salinity at the nine North-Atlantic ocean Weather Stations","volume":"3","author":"Taylor","year":"1980","journal-title":"Oceanol. Acta"},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"2675","DOI":"10.1175\/JCLI-D-17-0532.1","article-title":"Salinity trends within the upper layers of the subpolar North Atlantic","volume":"31","author":"Tesdal","year":"2018","journal-title":"J. Clim."},{"key":"ref_64","doi-asserted-by":"crossref","unstructured":"Lehmann, A., Myrberg, K., Post, P., Chubarenko, I., Dailidiene, I., Hinrichsen, H.-H., H\u00fcssy, K., Liblik, T., Lips, U., and Meier, H.E.M. (2021). Salinity dynamics of the Baltic Sea. Earth Syst. Dyn. Discuss.","DOI":"10.5194\/esd-2021-15"},{"key":"ref_65","doi-asserted-by":"crossref","first-page":"585","DOI":"10.1038\/s41467-020-14474-y","article-title":"Ocean circulation causes the largest freshening event for 120 years in eastern subpolar North Atlantic","volume":"11","author":"Holliday","year":"2020","journal-title":"Nat. Commun."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/2.zoppoz.workers.dev:443\/https\/www.mdpi.com\/2072-4292\/14\/2\/423\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T22:02:43Z","timestamp":1760133763000},"score":1,"resource":{"primary":{"URL":"https:\/\/2.zoppoz.workers.dev:443\/https\/www.mdpi.com\/2072-4292\/14\/2\/423"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,1,17]]},"references-count":65,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2022,1]]}},"alternative-id":["rs14020423"],"URL":"https:\/\/2.zoppoz.workers.dev:443\/https\/doi.org\/10.3390\/rs14020423","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2022,1,17]]}}}