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首页> 外文期刊>Journal of oceanography >Vertical Nutrient Distributions in the Western North Pacific Ocean: Simple Model for Estimating Nutrient Upwelling, Export Flux and Consumption Rates
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Vertical Nutrient Distributions in the Western North Pacific Ocean: Simple Model for Estimating Nutrient Upwelling, Export Flux and Consumption Rates

机译：北太平洋西部的垂直养分分布：估算养分上升，出口通量和消耗率的简单模型

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摘要

A one-dimensional, steady-state model has been developed to understand the factors controlling vertical distributions of nutrients such as nitrate and phosphate in the western North Pacific water columns. The model includes simple physics and some biogeochemical processes. Nutrients are supplied by upwelling of nutrient-rich deep waters with a constant upwelling velocity and nutrient regeneration due to decomposition of sinking particulate matter; the latter is expressed by an exponential-type export flux. Nutrients are consumed in the water column due to uptake by marine organisms, represented by a first-order substrate kinetics. The consumption rate constant is given as an exponential function of depth. The model has been applied to a data set of WOCE (World Ocean Circulation Experiment) P9 one-time measurements observed in the western North Pacific. The calculated curves fit well to observed vertical nutrient profiles from 100 m depth to over 2,500 m depth at 35 stations from 19°N to 33°30′ N along 137°E with correlation factors of greater than 0.998. A modified model, including a correction term representing a depth-dependent upwelling velocity, can reproduce observed vertical nutrient profiles at 32 stations from 5°N to 18°30′ N along 137°E with correlation factors greater than 0.993. The results support the hypothesis that most of the vertical nutrient profiles in the western North Pacific are controlled by particle export flux, consumption rate, remineralization rate and upwelling velocity.
机译：已开发出一维稳态模型，以了解控制北太平洋西部水域中诸如硝酸盐和磷酸盐等养分垂直分布的因素。该模型包括简单的物理学和一些生物地球化学过程。营养物质通过不断上升的营养丰富的深水上升流来提供，并且由于下沉的颗粒物质的分解而使营养物再生;后者用指数型出口通量表示。营养物质由于海洋生物的吸收而在水柱中消耗，以一级底物动力学表示。消耗速率常数作为深度的指数函数给出。该模型已应用于在北太平洋西部观测到的一次WOCE（世界海洋环流实验）P9数据集。计算得出的曲线非常适合观测到的垂直养分分布，从190°C到137°E到33°30'N的35个站点（从137°E到100 m深度到2500 m深度），相关系数大于0.998。修改后的模型（包括代表与深度有关的上升速度的校正项）可以重现在32个站点（从5°N到18°30'N，沿着137°E）观察到的垂直养分剖面，相关系数大于0.993。结果支持以下假设：北太平洋西部的大部分垂直养分分布受颗粒出口通量，消耗速率，再矿化速率和上升速度控制。

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