Redfield stoichiometry in Arabian Sea subsurface waters
Redfield stoichiometry in Arabian Sea subsurface waters
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阿拉伯海地下水域的雷德菲尔德化学计量
DOI：
10.1029/1999gb900077
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发表时间：
2000
影响因子：
5.2
通讯作者：
J. Karstensen
中科院分区：
文献类型：
--
作者：
A. Hupe;J. Karstensen
采用线性逆混合模型对1995年联合全球海洋通量研究和世界海洋环流实验巡航期间收集的水文、营养盐和碳数据进行了估算，以估计阿拉伯海550 - 4500 m之间的ΔCorg/ΔN/ΔP/ΔSi/-ΔO2矿化比。所观察到的浓度被分离成混合馏分的源水质量和变化引起的矿化过程，而反硝化作用的影响被认为是。在早期的调查，diapycnal混合，在阿拉伯海溶解物质通量中发挥着重要作用，占。的比率被发现是可变的深度，特别是在上2000米的水柱。我们假设，一般来说，在矿化过程中，营养物质的释放速度比二氧化碳快。ΔCorg/ΔCinorg从550 m处的0.4 ± 1下降到2000 m处的2 ± 0.2和4000 m处的1.2 ± 0.3，表明在阿拉伯海方解石溶跃层之上的碳酸钙溶解是一个潜在的重要过程。
A linear inverse mixing model is applied to hydrographic, nutrient, and carbon data collected during Joint Global Ocean Flux Study and World Ocean Circulation Experiment cruises in 1995 to estimate the ΔCorg/ΔN/ΔP/ΔSi/‐ΔO2 remineralization ratios within the Arabian Sea between 550 and 4500 m. The observed concentrations are separated into mixing fractions of source water masses and changes caused by remineralization processes, while the effect of denitrification is considered. In contrast to earlier investigations, diapycnal mixing, which plays an important role in dissolved matter fluxes in the Arabian Sea, is accounted for. The ratios are found to be variable with depth, especially in the upper 2000 m of the water column. We suppose that in general nutrients are released faster than carbon dioxide during remineralization. The ΔCorg/ΔCinorg decrease from ∼4 ± 1 at 550 m to 2 ± 0.2 at 2000 m and 1.2 ± 0.3 at 4000 m, suggesting that the dissolution of calcium carbonate above the calcite lysocline is a potentially important process within the Arabian Sea.