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Particulate Scattering and Backscattering in Relation to the Nature of Particles in the Red Sea

机译:与红海颗粒性质相关的颗粒散射和反向散射

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摘要

Measurements of light scattering can be used to quantify the concentration and composition of oceanic particles, and resolve bio-geochemical processes spanning different time and space scales. In this paper, we analyze the first dataset, collected over wide spatial scales in the Red Sea, of particulate scattering ((Formula presented.)), particulate backscattering ((Formula presented.)), particulate absorption and chlorophyll-a concentration [ChLa]. We fit a three-component conceptual model relating (Formula presented.) to [ChLa], assuming a fixed background component ((Formula presented.)), and two additional components driven by small (<2 (Formula presented.) m) and large phytoplankton (>2 (Formula presented.) m) ((Formula presented.) and (Formula presented.), respectively). We extend the approach, for the first time, to the modeling of total particulate scattering ((Formula presented.)), allowing us to retrieve the backscattering ratio for each component in the model. We observe a high backscatter- ing ratio for the background component which, when analyzed alongside measurements of particulate absorption, suggests it is likely dominated by non-algal (rather than algal) particles. The high contribution of non-algal particles to (Formula presented.) at low [ChLa] may be related to the unique conditions in the Red Sea, or more broadly, characteristic of other oceanic conditions. The work illustrates how we can combine optical measurements with conceptual models, to understand better the composition of oceanic particles and ultimately, improve monitoring of marine biogeochemical processes. Our work will also be useful for developing regional ocean-color models for the Red Sea.
机译:光散射的测量可用于量化海洋颗粒的浓度和组成,并解决跨越不同时间和空间尺度的生物地球化学过程。在本文中,我们分析了在红海的宽空间鳞片上收集的第一个数据集((所呈现的公式)),颗粒背散,颗粒背散,颗粒吸收和叶绿素-A浓度[chla ]。假设固定的背景组分((所示的公式)),符合三分组成的概念模型(提供的公式。)至[chla],以及由小的(<2(所示的公式)驱动的两种附加组分)和大型浮游植物(> 2(提供的配方。)m)((提供的公式。我们首次扩展方法,将方法延伸到总颗粒散射的建模((所呈现的公式)),允许我们检索模型中每个组件的反向散射比。我们观察到背景组分的高背散射比,当与颗粒吸收的旁边分析时,这表明它可能由非藻类(而不是藻类)颗粒为主。非藻类颗粒在低[CHLA]中的非藻颗粒的高贡献可能与红海的独特条件有关,或者更广泛地,其他海洋状况的特征有关。该工作说明了我们如何将光学测量与概念模型相结合,以了解海洋粒子的组成,最终改善海洋生物地球化学过程的监测。我们的作品也将对红海开发区域海洋模型有用。

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  • 来源
    《Oceanographic Literature Review》 |2021年第6期|1242-1242|共1页
  • 作者单位

    Red Sea Research Center (RSRC) King Abdullah University of Science and Technology (KAUST) Biological and Environmental Sciences and Engineering Division (BESE) Thuwal Saudi Arabia;

    Red Sea Research Center (RSRC) King Abdullah University of Science and Technology (KAUST) Biological and Environmental Sciences and Engineering Division (BESE) Thuwal Saudi Arabia;

    Red Sea Research Center (RSRC) King Abdullah University of Science and Technology (KAUST) Biological and Environmental Sciences and Engineering Division (BESE) Thuwal Saudi Arabia;

    Red Sea Research Center (RSRC) King Abdullah University of Science and Technology (KAUST) Biological and Environmental Sciences and Engineering Division (BESE) Thuwal Saudi Arabia;

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