Development of Ba-Si/N diagram in the ocean

1. 在等径水平sigma4=45.86处，研究了深海温盐环流路径上钡（Ba）和硅酸盐/硝酸盐比（Si/N）的水平分布。与北大西洋北部深水区相比，北大西洋北部深水区Ba浓度高约3.5倍，Si/N比值高约9倍。研究了北太平洋（NP）、东印度、南太平洋西部塔斯曼海（TSM）、东赤道太平洋（EEqP）、南大洋（SAA）和南大洋（AA）以及邻近的鄂霍次克海（OHT）、日本海（JPN）、华南海（SC）、苏禄海（SL）和安达曼海（ADM）等海域Ba浓度与Si/N比值的关系。在Ba-Si/N图分析的基础上，在各盆地中发现了这两个参数之间的线性关系。这些回归关系,相关系数如下;NP:英航= 2.1 + 32.4 (Si / N) R ^ 2 = 0.98 (1) EI:英航= 33.5 + 18.4 (Si / N) R ^ 2 = 0.97 (2) TSM:英航= 32.3 + 23.2 (Si / N) R ^ 2 = 0.97 (3) EEqP:英航= 15.6 + 32.4 (Si / N) R ^ 2 = 0.99 (4) SAA:英航= 52.1 + 12.8 (Si / N) R ^ 2 = 0.96 (5) AA:英航= 57.4 + 10.6 (Si / N) R ^ 2 = 0.92 (6) OHT:英航= 17.5 + 24.1 (Si / N) R ^ 2 = 0.97(7)日本:英航= 30.8 + 15.2 (Si / N) R ^ 2 = 0.85 (8) SC:英航= 3.5 + 28.3 (Si / N) R ^ 2 = 0.99 (9) SL:英航= 24.3 + 17.5 (Si / N) R ^ 2 = 0.98 (10) ADM:英航= 25.9 + 20.2 (Si / N) R ^ 2 = 0.99(11)因此,该关系的斜率在南冰洋最小，在北太平洋最大。这些结果表明，各大洋盆地Ba-Si/N图显示的线性相关关系有助于重建过去的海水成分，Ba / Si/N，并可作为pleoceanographic的代理

1. Horizontal distributions of barium (Ba) and silicate/nitrate ratio (Si/N) along the pathway of the deep-sea thermohaline circulation in the ocean were examined at the isopicnal horizon of sigma4=45.86. Comparing to the deep water in the northern North Atlantic, Ba concentration is ca.3.5 fold and the ratio of Si/N is ca.9 fold higher in the northern North Pacific.2. The relationship between the concentration of Ba and the ratio of Si/N was examined in the oceans which are the North Pacific (NP), Eastern Indian, Tasman Sea of the western South Pacific (TSM), East Equatorial Pacific (EEqP), Sub Antarctic Ocean (SAA) and Antarctic Ocean (AA), and also in the adjacent seas which are Okhotsk (OHT), Japan (JPN), South China (SC), Sulu (SL) and Andaman (ADM) Seas. In the basis on the analysis by the Ba-Si/N diagram, the linear relations between the two parameters were found in each basin. Those regression relations and correlation coefficients are as follows ;NP:Ba=2.1+32.4(Si/N) R^2=0.98 (1)EI:Ba=33.5+18.4(Si/N) R^2=0.97 (2)TSM:Ba=32.3+23.2(Si/N) R^2=0.97 (3)EEqP:Ba=15.6+32.4(Si/N) R^2=0.99 (4)SAA:Ba=52.1+12.8(Si/N) R^2=0.96 (5)AA:Ba=57.4+10.6(Si/N) R^2=0.92 (6)OHT:Ba=17.5+24.1(Si/N) R^2=0.97 (7)JPN:Ba=30.8+15.2(Si/N) R^2=0.85 (8)SC:Ba=3.5+28.3(Si/N) R^2=0.99 (9)SL:Ba=24.3+17.5(Si/N) R^2=0.98 (10)ADM:Ba=25.9+20.2(Si/N) R^2=0.99 (11)Consequently, the minimum slope of the relation was obtained in the Antarctic Ocean, oppositely the maximum in the North Pacific Ocean. These results demonstrate that the linear correlationship shown on the Ba-Si/N diagram in each oceanic basin is useful for reconstructing the past seawater composition, Ba vs Si/N, and serves as a pleoceanographic proxy