{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T09:19:51Z","timestamp":1789550391645,"version":"build-2803163510"},"reference-count":43,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2015,12,31]],"date-time":"2015-12-31T00:00:00Z","timestamp":1451520000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The East\/Japan Sea (hereafter, the East Sea) is highly dynamic in its physical phenomena and biological characteristics, but it has changed substantially over the last several decades. In this study, a recent decadal trend of primary productivity in the East Sea was analyzed based on Moderate-Resolution Imaging Spectroradiometer (MODIS)-derived monthly values to detect any long-term change. The daily primary productivities averaged using monthly values from 2003 to 2012 were 719.7 mg\u00b7C\u00b7m\u22122\u00b7d\u22121 (S.D. \u00b1 197.5 mg\u00b7C\u00b7m\u22122\u00b7d\u22121, n = 120) and 632.3 mg\u00b7C\u00b7m\u22122\u00b7d\u22121 (S.D. \u00b1 235.1 mg\u00b7C\u00b7m\u22122\u00b7d\u22121, n = 120) for the southern and northern regions of the East Sea, respectively. Based on the daily productivities, the average annual primary production in the East Sea was 246.8 g\u00b7C\u00b7m\u22122\u00b7y\u22121, which was substantially higher than that previously reported in deep oceans. However, a decreasing trend (13% per 10 years) in the annual primary production was observed in the East Sea within the study period from 2003 to 2012. The shallower mixed layers caused by increased temperature could be a potential cause for the decline in annual production. However, this decline could also be part of an oscillation pattern that is strongly governed by the Pacific Decadal Oscillation (PDO). A better understanding of primary productivity patterns and their subsequent effects on the marine ecosystem is required for further interdisciplinary studies in the East Sea.<\/jats:p>","DOI":"10.3390\/rs8010025","type":"journal-article","created":{"date-parts":[[2016,1,5]],"date-time":"2016-01-05T02:29:07Z","timestamp":1451960947000},"page":"25","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":65,"title":["Long-Term Pattern of Primary Productivity in the East\/Japan Sea Based on Ocean Color Data Derived from MODIS-Aqua"],"prefix":"10.3390","volume":"8","author":[{"given":"HuiTae","family":"Joo","sequence":"first","affiliation":[{"name":"Department of Oceanography, Pusan National University, Geumjeong-gu, Busan 46241, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"SeungHyun","family":"Son","sequence":"additional","affiliation":[{"name":"CIRA, Colorado State University, Fort Collins, CO 80523, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jung-Woo","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Oceanography, Pusan National University, Geumjeong-gu, Busan 46241, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jae","family":"Kang","sequence":"additional","affiliation":[{"name":"Department of Oceanography, Pusan National University, Geumjeong-gu, Busan 46241, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jin-Yong","family":"Jeong","sequence":"additional","affiliation":[{"name":"Korea Institute of Ocean Science and Technology, Ansan 15627, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chung","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Marine Bioscience, GangneungWonju National University, Kangwon 25457, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chang-Keun","family":"Kang","sequence":"additional","affiliation":[{"name":"School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 500-712, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2445-0690","authenticated-orcid":false,"given":"Sang","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Oceanography, Pusan National University, Geumjeong-gu, Busan 46241, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2015,12,31]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"C05042","DOI":"10.1029\/2006JC003981","article-title":"A numerical study on nutrient sources in the surface layer of the Japans Sea using a coupled physical-ecosystem model","volume":"112","author":"Onitsuka","year":"2007","journal-title":"J. Geophys. Res."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"337","DOI":"10.1046\/j.1365-2419.2002.00211.x","article-title":"Long_term changes in zooplankton and its relation_ship with squid, Todarodes pacificus, catch in Japan\/East Sea","volume":"11","author":"Kang","year":"2002","journal-title":"Fish. Oceanogr."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"23","DOI":"10.1093\/icesjms\/fsr178","article-title":"Impact of an anticyclonic eddy on the summer nutrient and Chl-a a distributions in the Ulleung Basin, East Sea (Japan Sea)","volume":"69","author":"Kim","year":"2012","journal-title":"ICES J. Mar. Sci."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"377","DOI":"10.1007\/s12601-012-0035-1","article-title":"Enhanced biological activity by an anticyclonic warm eddy during early spring in the East Sea (Japan Sea) detected by the geostationary ocean color satellite","volume":"47","author":"Lim","year":"2012","journal-title":"Ocean Sci. J."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"112","DOI":"10.1016\/j.pocean.2008.03.004","article-title":"From climate regime shifts to lower-trophic level phenology: Synthesis of recent progress in retrospective studies of the western North Pacific","volume":"77","author":"Chiba","year":"2008","journal-title":"Prog. Oceanogr."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"15","DOI":"10.4031\/MTSJ.33.1.3","article-title":"The East Sea (Japan Sea) in change: A story of dissolved oxygen","volume":"33","author":"Kim","year":"1999","journal-title":"Mar. Technol. Soc. J."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"3293","DOI":"10.1029\/2001GL013078","article-title":"Warming and structural changes in the East (Japan) Sea: A clue to future changes in global oceans?","volume":"28","author":"Kim","year":"2001","journal-title":"Geophys. Res. Lett."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1299","DOI":"10.1029\/2002GL016486","article-title":"A moving-boundary box model (MBBM) for oceans in change: An application to the East\/Japan Sea","volume":"30","author":"Kang","year":"2003","journal-title":"Geophys. Res. Lett."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"L15609","DOI":"10.1029\/2011GL048299","article-title":"Climatic forcing and phytoplankton phenology over the subarctic North Pacific from 1998 to 2006, as observed from ocean color data","volume":"38","author":"Sasaoka","year":"2011","journal-title":"J. Geophys. Lett."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"L15603","DOI":"10.1029\/2012GL052912","article-title":"Influence of the Pacific Decadal Oscillation on phytoplankton phenology and community structure in the western North Pacific","volume":"39","author":"Chiba","year":"2012","journal-title":"Geophys. Res. Lett."},{"key":"ref_11","first-page":"23","article-title":"Variation in mesozooplankton community structure in the Japan\/East Sea (1991\u20131999) with possible influence of the ENSO scale climatic variability","volume":"213","author":"Chiba","year":"2002","journal-title":"Prog. Oceanogr."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"245","DOI":"10.1016\/j.pocean.2004.06.009","article-title":"Variations in the abundance of fisheries resources and ecosystem structure in the Japan\/East Sea","volume":"61","author":"Zhang","year":"2004","journal-title":"Prog. Oceanogr."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"3002","DOI":"10.1002\/2014JC009862","article-title":"Long-term annual primary production in the Ulleung Basin as a biological hot spot in the East\/Japan Sea","volume":"119","author":"Joo","year":"2014","journal-title":"J. Geophys. Res. Oceans"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"92","DOI":"10.1016\/j.pocean.2015.05.006","article-title":"Ecosystem characteristics and processes facilitating persistent macrobenthic biomass hotspots and associated benthivory in the Pacific Arctic","volume":"136","author":"Grebmeier","year":"2015","journal-title":"Prog. Oceanogr."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"509","DOI":"10.1007\/s12601-015-0046-9","article-title":"Potential overestimation in primary and new productivitys of phytoplankton from a short time incubation method","volume":"50","author":"Lee","year":"2015","journal-title":"Ocean Sci. J."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1613","DOI":"10.1126\/science.241.4873.1613","article-title":"Oceanic primary productivity: Estimation by remote sensing at local and regional scales","volume":"241","author":"Platt","year":"1988","journal-title":"Science"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1","DOI":"10.4319\/lo.1997.42.1.0001","article-title":"Photosynthetic rates derived from satellite-based Chl-a concentration","volume":"42","author":"Behrenfeld","year":"1997","journal-title":"Limnol. Oceanogr."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"91","DOI":"10.3354\/meps303091","article-title":"Primary productivity in the Yellow Sea determined by ocean color remote sensing","volume":"303","author":"Son","year":"2005","journal-title":"Mar. Ecol. Prog. Ser."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"857","DOI":"10.1007\/s10872-006-0005-2","article-title":"Spatial and temporal variability of satellite primary productivity in the Japan Sea from 1998 to 2002","volume":"61","author":"Yamada","year":"2005","journal-title":"J. Oceanogr."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"771","DOI":"10.1134\/S0001437014060058","article-title":"Decadal changes of phytoplankton Chl-a-a in the East Sea\/Sea of Japan","volume":"6","author":"Lee","year":"2014","journal-title":"Oceanology"},{"key":"ref_21","unstructured":"Safran, P. (2009). Fisheries and Aquaculture, Eolss Publishers."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1235","DOI":"10.1111\/j.1365-2486.2010.02311.x","article-title":"Footprints of climate change in the Arctic marine ecosystem","volume":"17","author":"Wassmann","year":"2011","journal-title":"Glob. Chang. Biol."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"60","DOI":"10.1016\/j.pocean.2015.05.002","article-title":"Continued increases in Arctic Ocean primary productivity","volume":"136","author":"Arrigo","year":"2015","journal-title":"Prog. Ocenogr."},{"key":"ref_24","unstructured":"Falkowski, P.G., and Rave, J.A. (1997). Aquatic Photosynthesis, Blackwell. [2nd ed.]."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1112","DOI":"10.1029\/2002GB001942","article-title":"Seasonal and ENSO variability in global ocean phytoplankton Chl-a derived from 4 years of Sea WiFS measurements","volume":"17","author":"Yoder","year":"2003","journal-title":"Glob. Biogeochem. Cycles"},{"key":"ref_26","first-page":"118","article-title":"Studies on oceanic primary productivity using ocean color remote sensing data","volume":"9","author":"Kameda","year":"2003","journal-title":"Bull. Fish. Res. Agency"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"663","DOI":"10.1007\/s10872-005-0074-7","article-title":"Size-fractionated primary productivity estimated by a two-phytoplankton community model applicable to ocean color remote sensing","volume":"61","author":"Kameda","year":"2005","journal-title":"J. Oceanogr."},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Kirt, J.T.O. (1994). Light and Photosynthesis in Aquatic Ecosystems, Cambridge University Press. [2nd ed.].","DOI":"10.1017\/CBO9780511623370"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"455","DOI":"10.1093\/icesjms\/24.3.455","article-title":"The seasonal variation in oceanic productivity as a problem in population dynamics","volume":"24","author":"Cushing","year":"1959","journal-title":"J. Cons. Int. Explor. Mer."},{"key":"ref_30","unstructured":"Son, S. (1998). The Chl-a Pigment Distribution in the East\/Japan Sea Observed by Coastal Zone Color Scanner (CZCS). [Master\u2019s Thesis, Pusan National University]."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"193","DOI":"10.1016\/j.pocean.2004.06.001","article-title":"Seasonal and interannual variability of sea surface Chl-a a concentration in the Japan\/East Sea (JES)","volume":"61","author":"Yamada","year":"2004","journal-title":"Prog. Oceanogr."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"111","DOI":"10.1023\/A:1007825609622","article-title":"The Japan Sea intermediate water; characteristics and circulation","volume":"55","author":"Senjyu","year":"1999","journal-title":"J. Oceanogr."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"1363","DOI":"10.1016\/j.dsr2.2005.05.001","article-title":"Characterization of the zooplankton community, size composition, and distribution in relation to hydrography in the Japan\/East Sea","volume":"52","author":"Ashjian","year":"2005","journal-title":"Deep Sea Res. II"},{"key":"ref_34","unstructured":"Ketchum, B.H. (1983). Estuaries and Enclosed Seas, Elsevier Scientific Publishing Company."},{"key":"ref_35","first-page":"29","article-title":"The relationship between Chl-a a and transparency in the southern Japan Sea","volume":"28","author":"Nagata","year":"1992","journal-title":"Proc. Jpn. Sci. Coun. Fish. Resour."},{"key":"ref_36","unstructured":"Choi, J.K. (2003). The Plankton Ecology of Korean Coastal Waters, Dongwha Press."},{"key":"ref_37","first-page":"55","article-title":"Primary productivity in the northwestern Mediterranean","volume":"60","author":"Estrada","year":"1996","journal-title":"Sci. Mar."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"245","DOI":"10.1038\/30455","article-title":"Simulated response of the ocean carbon cycle to anthropogenic climate warming","volume":"393","author":"Sarmiento","year":"1998","journal-title":"Nature"},{"key":"ref_39","first-page":"1809","article-title":"Ocean Primary productivity and climate: Global decadal changes","volume":"15","author":"Gregg","year":"2003","journal-title":"Geophys. Res. Lett."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"415","DOI":"10.3319\/TAO.2013.12.31.01(Oc)","article-title":"A temporal multiscale analysis of the waters off the east coast of south Korea over the past four decades","volume":"3","author":"Jo","year":"2014","journal-title":"Terr. Atoms. Ocean. Sci."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"130","DOI":"10.1029\/2002GL014689","article-title":"Decadal changes in global ocean Chl-a","volume":"29","author":"Gregg","year":"2002","journal-title":"Geophys. Res. Lett."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"922","DOI":"10.1093\/icesjms\/fst084","article-title":"Climate forcing and the Kuroshio\/Oyashio ecosystem","volume":"70","author":"Yatsu","year":"2013","journal-title":"ICES J. Mar. Sci."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"2521","DOI":"10.1016\/S0967-0637(01)00023-1","article-title":"On the size of the Peru upwelling ecosystem","volume":"48","author":"Nixon","year":"2001","journal-title":"Deep Sea Res. I"}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/8\/1\/25\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T20:55:08Z","timestamp":1760216108000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/8\/1\/25"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2015,12,31]]},"references-count":43,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2016,1]]}},"alternative-id":["rs8010025"],"URL":"https:\/\/doi.org\/10.3390\/rs8010025","relation":{},"ISSN":["2072-4292"],"issn-type":[{"value":"2072-4292","type":"electronic"}],"subject":[],"published":{"date-parts":[[2015,12,31]]}}}