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Oxygen isotopic composition and its application to the study of tracing oceanographical process in Bering Sea and Chukchi Sea
YinMingduan(尹明端), ZengXianzhang(曾宪章), ZengWenyi(曾文义), WuShiyan(吴世炎), ShiChuntan (施纯坦)
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Oxygen isotopic composition and its application to the study of tracing oceanographical process in Bering Sea and Chukchi Sea
In this paper, the 18O distribution of surface water from the central sea areas of the Bering Sea and the Chukchi Sea was studied. The δ18O value of surface water from the Bering Sea is averagely - 0.5 ‰; the δ18O contents of the Chukchi Sea are distributionally lower in northeast and higher in southwest; the δ18O value at the margin of Canadian Basin is - 2.8 ‰, and averagely - 0.8 ‰ in the southern area of the Chukchi Sea. The δ18O vertical distribution in some deep water stations from the Chukchi Sea and the Bering Sea is also studied. In the southern margin of Canadian Basin, the δ18O value is - 2 ‰-3 ‰for surface layer and rises to 0 at 100 m depth layer. In the Bering Sea, the δ18O is about - 0.5 ‰ for surface layer and increases to 0 at the depth of 300 m. The NO tracer can reflect obviously three water masses vertically distributed in the central Bering Sea: the upper Bering water mass, the middle Bering water mass and the deep Pacific water mass. The distributive ranges of NO and temperature for the various water masses are T＜ 7 ℃, NO＞ 780 μmol/dm3 and T ≥7 ℃, NO＞ 650 μmol/dm3 for upper Bering water mass, T ＜ 4 ℃, 550＜ NO＜ 780 μmol/dm3 for middle Bering water mass, and T＜ 4 ℃, 330＜ NO＜ 550 Mmol/ elm for deep Pacific water mass. It is found from δ18O- S relation diagram and δ18O vertical profiles that the δ18O is al＞out + 0.3 ‰ from halocline layer till sea bottom. Its isotopic characteristics are the same as the Atlantic water, showing that the sea water comes from the north Atlantic. The freshwater enchmember of the Chukchi Sea in the survey period is ako explored.
Chukchi Sea / Bering Sea / 18O / water masses / Sea-ice melting water {{custom_keyword}} /
1 Bjork G(1987): The vertical distribution of nutrients an(i oxygen 18 in upper Arctic Ocean. J. Geophys. Res., 92: 3769-3777. DOI:10.1029/JC092iC04p03769
2 Bjork G(1990): The vertical distribution of nutrients and oxygen 18 in upper Arctic Ocean. J. Geophys. Res., 95(C9): 16025-16036. DOI:10.1029/JC095iC09p16025
3 Cooper LW, W hit ledge TE et al. (1997): The nutrient, salinity, and stable oxygen isotope composition of Bering and Chukchi Seas waters in and near the Bering Strait. J. Geophys. Res., 102(C6): 12563-12573. DOI:10.1029/97JC00015
4 Craig H, Gordon LI(1965a): Deuterium and oxygerrl8 variations in the ocean and marine atmosphere, in spoleto Meeting on Nuclear Geology, stable Isotopes in oceanography studies and paleo Temperature. Lab. di Geol. Pisa, Italy, 9-130.
5 Craig H, Gordon LI(1965b): Isotopic Oceanography: Deuterium and oxygerr 18 variations in the ocean and marine atmosphere. In: Schink DR and Corless JT, ed. Symposium on marine geochemistry, Narragansett Marine Laboratory, Graduate School of Oceanography, University of Rhode Island, Occasional Publication, No. 3, 277-373.
6 Hong AS, Li P, Peng ZC, Wang ML(1993): Oxygen isotopic features in surface layer of Pacific, Southern Ocean and Prydz Bay, Antarctic. Marine Science Bulletin, 12(4): 49-54.
7 Hong AS, Wang ML, Gao RX, Hong Y(1994): A Preliminary investigation on the composing characteristic of oxygen isotope of the seawater from the tropical west Pacific. Oceanologia et limnologia Sinica, 25(4): 416-421.
8 Huang YP, Jin DQ, Zhou XH, Chen M, Xie YZ, Chen FZ, Qiu YS, Chen XB, Cai PH(1996a): Horizontal distribution features of deuterium in the Nansha sea area, isotope marine chemistry of Nansha Islands waters. Beijing: China Ocean Press, 1-10.
9 Huang YP, Jin DQ, Zhou XH, Chen M, Xie YZ, Chen FZ, Qiu YS, Chen XB, Cai PH(1996b): Vertical and sectional distribution features of deuterium in the Nansha sea area, isotope marine chemistry of Nansha Islands waters. Beijing: China Ocean Press, 11-26.
10 Huang YP, Jin DQ, Zhou XH, Chen M, Xie YZ, Chen FZ, Qiu YS, Chen XB, Cai PH(1996c): Relation of content of deuterium to salinity in the Nansha sea area, isotope marine chemistry of Nansha Islands waters. Beijing: China Ocean Press, 28-44.
11 Huang YP, Shi WY, Jin DQ, Gu ZN, Lu WC, Fu ZL, Xiao Y, Xie YZ, Qiu YS, Chen M, Chen FZ(1996d): The distribution of O in the waters of the Northeastern South China Sea, Oceanographic Collated Works of China. Beijing: China Ocean Press, 82-92. 18
12 Li PQ, Kang XL(1988): The ratio of O/ O and its application in seawater. Marine Sciences, (6): 44-47. 18 16
13 Li WQ, Hong HS(1991): The distributional features of O ami its trace study of water masses from the southern in the Taiwan Straits, The ecologic study of waters from up welling current of the shoal fishery in the M innarrTaiwan. Beijing: Science Press, 307-315. 18
14 Lin RF, Wei KQ, Cheng ZY, Liao S(1996): Tritium in sea water of the Nansha sea area, Isotope marine chemistry of Nansha Islands waters. Beijing: China Ocean Press, 45-52.
15 Ostlund HG, Hut G (1984): Arctic ocean water mass balance from isotope data. J. Geophys. Res., 89: 6373-6384. DOI:10.1029/JC089iC04p06373
16 O' neil JR(1968): Hydrogen and Oxygen isotope fractionation l＞etween ice and water. J. Phys. Chem., 72: 3683-3684. DOI:10.1021/j100856a060
17 Van Donk J, Mathieu G(1969): Oxygen isotope composition of foraminifer and water sample from the Arctic Ocean. J. Geophys. Res., 74: 3396-3407. DOI:10.1029/JC074i013p03396
18 Vetshteyn V Ye, Malyuk GA, Rusanov VP(1974): Oxygerr 18 distribution in the central Arctic Basin. Oceanology, 14: 514-519.
19 Wei KQ, Lin RF, Cheng ZY, Liao S(1996): Oxygen isotopic composition of seawater in the Nansha sea area, Isotope marine chemistry of Nansha Islands waters. Beijing: China Ocean Press, 53-59.
20 Wu SY(1988): Study on the oxygen isotope constitutions of nearshore and ocean water. Journal of oceanography of Huanghai & Bohai Sea, 6(3): 43-54.
21 Zhou XH, Jin DQ, Ni BL, Wang DZ, Zhang QL(1989): Distribution of hydrogerroxygen in water from the equatorial region in Pacific. Chemisty, (11): 28.
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