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Based on linear and nonlinear sea level change characteristics, this paper decomposes 1992\u20132019 monthly mean sea level anomaly time series in the South China Sea into trend, seasonal, and random terms. This paper compares the seasonal autoregressive integrated moving average (SARIMA) and Prophet models for estimating the trend and seasonal terms and the long short-term memory (LSTM) and radial basis function (RBF) models for estimating random terms, and the more suitable models were selected. A Prophet-LSTM combined model was developed based on the accuracy results. This paper uses the combined model to study the effect of known data length on the experimental results and determines the best prediction duration. The results show that the combined model is suitable for short-term and medium-term estimations of 12\u201336 months. The accuracy at 36 months is 0.962\u2009cm, which proves that the combined model has high application value for estimating sea level changes in the South China Sea.<\/jats:p>","DOI":"10.1155\/2021\/6618135","type":"journal-article","created":{"date-parts":[[2021,2,17]],"date-time":"2021-02-17T12:51:28Z","timestamp":1613566288000},"page":"1-7","source":"Crossref","is-referenced-by-count":0,"title":["Estimation of Sea Level Change in the South China Sea from Satellite Altimetry Data"],"prefix":"10.1155","volume":"2021","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5049-9394","authenticated-orcid":true,"given":"Shanwei","family":"Liu","sequence":"first","affiliation":[{"name":"College of Oceanography and Space Informatics, China University of Petroleum Qingdao, Qingdao 266580, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5852-4737","authenticated-orcid":true,"given":"Yue","family":"Jiao","sequence":"additional","affiliation":[{"name":"College of Oceanography and Space Informatics, China University of Petroleum Qingdao, Qingdao 266580, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5821-8788","authenticated-orcid":true,"given":"Qinting","family":"Sun","sequence":"additional","affiliation":[{"name":"School of Geosciences, China University of Petroleum Qingdao, Qingdao 266580, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jinghui","family":"Jiang","sequence":"additional","affiliation":[{"name":"College of Oceanography and Space Informatics, China University of Petroleum Qingdao, Qingdao 266580, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","reference":[{"issue":"22","key":"1","first-page":"1285","article-title":"The status of the resource potential and petroleum exploration of the South China Sea","volume":"8","author":"J. 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