{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T01:32:22Z","timestamp":1760059942585,"version":"build-2065373602"},"reference-count":23,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2025,7,19]],"date-time":"2025-07-19T00:00:00Z","timestamp":1752883200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100005056","name":"National Institute of Fisheries Science","doi-asserted-by":"publisher","award":["R2025015","RS-2023-00256330"],"award-info":[{"award-number":["R2025015","RS-2023-00256330"]}],"id":[{"id":"10.13039\/501100005056","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100011705","name":"Korea Institute of Marine Science &amp; Technology Promotion","doi-asserted-by":"publisher","award":["R2025015","RS-2023-00256330"],"award-info":[{"award-number":["R2025015","RS-2023-00256330"]}],"id":[{"id":"10.13039\/501100011705","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Ministry of Oceans and Fisheries (MOF), Korea","award":["R2025015","RS-2023-00256330"],"award-info":[{"award-number":["R2025015","RS-2023-00256330"]}]},{"name":"Development of Risk Managing Technology Tackling Ocean and Fisheries Crisis around Korean Peninsula by Kuroshio Current","award":["R2025015","RS-2023-00256330"],"award-info":[{"award-number":["R2025015","RS-2023-00256330"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Data"],"abstract":"<jats:p>This dataset presents environmental observations collected in August 2021 from 18 port and harbor sites located around Jeju Island, Korea. It includes physical, biogeochemical, and greenhouse gas (GHG) variables measured in surface seawater, such as temperature, salinity, dissolved oxygen, nutrients, chlorophyll-a, pH, total alkalinity, and dissolved inorganic carbon. Concentrations and air\u2013sea fluxes of nitrous oxide (N2O), methane (CH4), and carbon dioxide (CO2) were also quantified. All measurements were conducted following standardized analytical protocols, and certified reference materials and duplicate analyses were used to ensure data accuracy. Consequently, the dataset revealed that elevated nutrient accumulation in port and harbor waters and GHG concentrations tended to be higher at sites with stronger land-based influence. During August 2021, most sites functioned as sources of N2O, CH4, and CO2 to the atmosphere. This integrated dataset offers valuable insights into the influence of anthropogenic and hydrological factors on coastal GHG dynamics and provides a foundation for future studies across diverse semi-enclosed marine systems.<\/jats:p>","DOI":"10.3390\/data10070118","type":"journal-article","created":{"date-parts":[[2025,7,21]],"date-time":"2025-07-21T07:56:14Z","timestamp":1753084574000},"page":"118","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Dataset on Environmental Parameters and Greenhouse Gases in Port and Harbor Seawaters of Jeju Island, Korea"],"prefix":"10.3390","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9308-5119","authenticated-orcid":false,"given":"Jae-Hyun","family":"Lim","sequence":"first","affiliation":[{"name":"Marine Environmental Research Division, National Institute of Fisheries Science, Busan 46083, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8908-0902","authenticated-orcid":false,"given":"Ju-Hyoung","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Aquaculture and Aquatic Science, Kunsan National University, Gunsan 54150, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6067-5873","authenticated-orcid":false,"given":"Hyo-Ryeon","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Marine Science, Incheon National University, Incheon 22012, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Seo-Young","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Marine Science, Incheon National University, Incheon 22012, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Il-Nam","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Marine Science, Incheon National University, Incheon 22012, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,7,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"137463","DOI":"10.1016\/j.colsurfa.2025.137463","article-title":"Settling behavior and mechanism analysis of kaolinite as a fracture proppant of hydrocarbon reservoirs in CO2 fracturing fluid","volume":"724","author":"Li","year":"2025","journal-title":"Colloids Surf. 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