The effect of marine aggregate parameterisations on nutrients and oxygen minimum zones in a global biogeochemical model
The effect of marine aggregate parameterisations on nutrients and oxygen minimum zones in a global biogeochemical model
复制标题
海洋骨料参数化对全球生物地球化学模型中营养物和氧气最低区的影响
作者：
Daniela Niemeyer;I. Kriest;A. Oschlies
抽象的。颗粒聚集决定颗粒通量长度
规模并影响海洋氧气浓度，从而影响海洋的体积
与海洋营养物特别相关的氧气最低区（OMZ）
循环和海洋生态系统，并且被发现扩张速度比
可以用当前最先进的模型来解释。为了调查
粒子聚集对全局模型性能的影响，我们进行了
海洋骨料不同参数化的敏感性研究
两种不同的模型分辨率。模型性能的研究
关于全球营养物和氧气浓度以及范围和
OMZ 的位置。结果表明，包含聚合模型可以改善
OMZ 的表示。此外，我们发现除了良好的空间
模型网格的分辨率，多孔颗粒的考虑，
中到高的颗粒下沉速度和中到高的
粘性改善了模型对溶解的全局分布的拟合
无机示踪剂和 OMZ 的区域模式，与没有的模型相比
聚合。因此，我们的模型结果表明，改进不仅
在模型物理中，也在粒子聚集的描述中
流程可以在提高代表性方面发挥重要作用
全球范围内溶解的无机示踪剂和 OMZ。然而，溶解
无机示踪剂显然不足以用于全球模型
校准，这可能需要针对一个全局模型进行校准
海洋有机颗粒全球观测数据集。
Abstract. Particle aggregation determines the particle flux length
scale and affects the marine oxygen concentration and thus the volume of
oxygen minimum zones (OMZs) that are of special relevance for ocean nutrient
cycles and marine ecosystems and that have been found to expand faster than
can be explained by current state-of-the-art models. To investigate the
impact of particle aggregation on global model performance, we carried out a
sensitivity study with different parameterisations of marine aggregates and
two different model resolutions. Model performance was investigated with
respect to global nutrient and oxygen concentrations, as well as extent and
location of OMZs. Results show that including an aggregation model improves
the representation of OMZs. Moreover, we found that besides a fine spatial
resolution of the model grid, the consideration of porous particles, an
intermediate-to-high particle sinking speed and a moderate-to-high
stickiness improve the model fit to both global distributions of dissolved
inorganic tracers and regional patterns of OMZs, compared to a model without
aggregation. Our model results therefore suggest that improvements not only
in the model physics but also in the description of particle aggregation
processes can play a substantial role in improving the representation of
dissolved inorganic tracers and OMZs on a global scale. However, dissolved
inorganic tracers are apparently not sufficient for a global model
calibration, which could necessitate global model calibration against a
global observational dataset of marine organic particles.
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影响因子：
4.5
作者：
H. Ploug;M. Iversen;G. Fischer
通讯作者：
H. Ploug;M. Iversen;G. Fischer
影响因子：
5.2
作者：
S. Henson;A. Yool;R. Sanders
通讯作者：
S. Henson;A. Yool;R. Sanders
影响因子：
5.2
作者：
Guidi, Lionel;Legendre, Louis;Henson, Stephanie A.
通讯作者：
Henson, Stephanie A.
影响因子：
11.4
作者：
Le Moigne, F. A. C.;Henson, S. A.;Madsen, E.
通讯作者：
Madsen, E.
影响因子：
18.3
作者：
Kiko, R.;Biastoch, A.;Stemmann, L.
通讯作者：
Stemmann, L.