title: Distribution and temporal changes of lead in the surface seawater in the western Pacific and adjacent seas derived from coral skeletons.
abstract: We determined Pb contents together with Pb isotopic compositions in coral skeletons (Porites spp.) collected from the western Pacific and adjacent seas to examine distribution of Pb in sea surfaces. Temporal records of Pb were also investigated using coral skeletons from Hainan and Ogasawara Island, located in China and Japan, respectively. The spatial distribution of Pb showed a clear dilution pattern of Pb from Asian continent to the open ocean. Also the similar trend was found in the Java Sea from Jakarta to the offshore. In addition to the spatial distribution, Pb contents in Ogasawara coral have gradually increased during last 108 years. It may be attributed to Pb emission mainly from industrial activities in Asian countries. Hainan coral, which provided 10 years record of Pb, showed a remarkable decline around 1997 probably due to the partial introduction of unleaded gasoline in China.
authors.affiliation: Graduate School of Science, Tohoku University, Aoba, Sendai 980-8578, Japan. mayuri-inoue@aist.go.jp
authors.forename: Mayuri
authors.initials: M
authors.lastname: Inoue
authors.forename: Akiko
authors.initials: A
authors.lastname: Hata
authors.forename: Atsushi
authors.initials: A
authors.lastname: Suzuki
authors.forename: Masato
authors.initials: M
authors.lastname: Nohara
authors.forename: Naotatsu
authors.initials: N
authors.lastname: Shikazono
authors.forename: Wyss W-S
authors.initials: WW
authors.lastname: Yim
authors.forename: Wahyoe S
authors.initials: WS
authors.lastname: Hantoro
authors.forename: Sun
authors.initials: S
authors.lastname: Donghuai
authors.forename: Hodaka
authors.initials: H
authors.lastname: Kawahata
mesh_terms: D000818:Animals; D037421:Anthozoa / Q000737:chemistry*; D002681:China; D004784:Environmental Monitoring / Q000379:methods; D005843:Geography; D006723:Hong Kong; D007220:Industrial Waste; D007564:Japan; D007854:Lead / Q000032:analysis*; D009792:Oceans and Seas; D012623:Seawater; D013057:Spectrum Analysis; D013995:Time; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D007854:Lead