{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T07:36:04Z","timestamp":1780472164440,"version":"3.54.1"},"reference-count":54,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2021,12,30]],"date-time":"2021-12-30T00:00:00Z","timestamp":1640822400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"the Natural Science Foundation of China","award":["42030406"],"award-info":[{"award-number":["42030406"]}]},{"name":"the Ministry of Science and Technology of China","award":["2019YFD0901001"],"award-info":[{"award-number":["2019YFD0901001"]}]},{"name":"the ESA-NRSCC Scientific Cooperation Project on Earth Observation Science and Applications: Dragon 5","award":["58393"],"award-info":[{"award-number":["58393"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>A substantial portion of ocean eddies, especially small ones, may be missed due to insufficient spatial or temporal sampling by satellite altimetry. In order to illustrate the influence of spatial resolution on eddy detection, this study provides a comparison of eddy identification, tracking, and analysis between two sets of merged altimeter data with spatial resolutions of 1\/4\u00b0 and 1\/8\u00b0. One main study area (the Mediterranean Sea), and three confirmatory areas (the South-China Sea, the North-West Pacific, and the South-East Pacific) are chosen. The results show that the number and density of eddies captured by the 1\/8\u00b0 data are about twice as much as those captured by the 1\/4\u00b0 data, while the ratios of corresponding eddy parameters, i.e., radius, amplitude, (eddy kinetic energy (EKE)) are about 0.6\u20130.8 (1.3) for the two datasets (1\/8\u00b0 \u00f7 1\/4\u00b0). Long-term eddy tracking (1993\u20132018) is conducted in the Mediterranean Sea, indicating that the improvement in spatial resolution will increase the observed values of both the lifetime and the propagation distance of robust eddies. The number of eddies identified using the 1\/4\u00b0 data only accounts for ~30% to 60% of those identified using the 1\/8\u00b0 data. However, for eddies that can be detected using the two datasets, ~5% to 10% present errors (i.e., confusion). In comparison between the four regions, we find that for the enclosed seas with complex conditions, the increase in spatial resolution may lead to more significant improvements in the efficiency and accuracy of eddy detection.<\/jats:p>","DOI":"10.3390\/rs14010149","type":"journal-article","created":{"date-parts":[[2021,12,30]],"date-time":"2021-12-30T23:29:07Z","timestamp":1640906947000},"page":"149","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["From 1\/4\u00b0 to 1\/8\u00b0: Influence of Spatial Resolution on Eddy Detection Using Altimeter Data"],"prefix":"10.3390","volume":"14","author":[{"given":"Yinuo","family":"Wang","sequence":"first","affiliation":[{"name":"College of Marine Technology, Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoyan","family":"Chen","sequence":"additional","affiliation":[{"name":"College of Marine Technology, Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guiyan","family":"Han","sequence":"additional","affiliation":[{"name":"College of Marine Technology, Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pingping","family":"Jin","sequence":"additional","affiliation":[{"name":"College of Marine Technology, Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jie","family":"Yang","sequence":"additional","affiliation":[{"name":"College of Marine Technology, Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, China"},{"name":"Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,12,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"167","DOI":"10.1016\/j.pocean.2011.01.002","article-title":"Global Observations of Nonlinear Mesoscale Eddies","volume":"91","author":"Chelton","year":"2011","journal-title":"Prog. 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