老爹海洋站从纳米到毫米的颗粒大小分布受到7种方法相互比较的约束

IF 4.7 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Elementa-Science of the Anthropocene Pub Date : 2023-01-01 DOI:10.1525/elementa.2022.00094
Xiaodong Zhang, Y. Huot, D. Gray, H. M. Sosik, D. Siegel, Lianbo Hu, Yuanheng Xiong, E. T. Crockford, G. Potvin, A. McDonnell, C. Roesler
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引用次数: 1

摘要

颗粒大小分布(PSD)是影响海洋生态系统各个方面的基本特性,包括生态营养相互作用和有机物和微量元素的运输。我们在东北太平洋Papa海洋站附近的水域使用一套7台仪器测量了psd。这些仪器和它们的尺寸范围是:激光原位散射和透射仪(LISST)-体积散射函数仪(VSF)和多光谱体积散射仪(MVSM),尺寸范围从0.02µm到2000µm;list - 100x,从3µm到180µm;ViewSizer,从0.3µm到2µm;Coulter Counter,从2µm到40µm;Imaging Flow CytoBot (IFCB),从5 μm到100 μm;水下视觉剖面仪(UVP),从100µm到2000µm。总的来说,它们覆盖了前所未有的尺寸范围,从20纳米到2毫米跨越5个数量级。不同仪器的大小定义的差异会导致比较psd时的偏差。在校正平均偏差后,所有仪器的psd的绝对差异小于3倍,在listst - 100x、listst +MVSM、Coulter Counter和IFCB之间的绝对差异在50%以内。我们还发现,粒径为50µm的颗粒。在0.02µm ~ 2000µm范围内,尽管颗粒总数随着深度的增加而减少,但水柱上75 m的PSD斜率变化不大。虽然亚微米颗粒在数值上占主导地位,但尺寸为1 μ m至100 μ m的颗粒占颗粒固体体积的70-90%。我们期望这项研究的结果将有助于改进对研究区域的质量和碳通量的估计。
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Particle size distribution at Ocean Station Papa from nanometers to millimeters constrained with intercomparison of seven methods
Particle size distribution (PSD) is a fundamental property that affects almost every aspect of the marine ecosystem, including ecological trophic interactions and transport of organic matter and trace elements. We measured PSDs using a suite of seven instruments in waters near Ocean Station Papa in the Northeast Pacific Ocean. These instruments and their sizing ranges are: Laser In-Situ Scattering and Transmissometer (LISST)-Volume Scattering Function meter (VSF) and Multispectral Volume Scattering Meter (MVSM), both sizing particles from 0.02 µm to 2000 µm; the LISST-100X, from 3 µm to 180 µm; the ViewSizer, from 0.3 µm to 2 µm; the Coulter Counter, from 2 µm to 40 µm; the Imaging Flow CytoBot (IFCB), from 5 µm to 100 μm; and the underwater vision profiler (UVP), from 100 µm to 2000 µm. Together, they cover an unprecedented size range spanning 5 orders of magnitude from 20 nm to 2 mm. The differences in size definition for the different instruments cause biases in comparing PSDs. The absolute differences in PSDs, after correcting for mean biases, were less than a factor of 3 among all the instruments, and within 50% among LISST-100X, LISST+MVSM, Coulter Counter and IFCB. We also found that particles of sizes <50 µm were not very porous; however, porosity must be considered for particles >50 µm. The merged PSDs, ranging from 0.02 µm to 2000 µm, showed little variation in the PSD slope in the upper 75 m of the water column even though the total number of particles decreased with depth. While submicrometer particles are numerically dominant, particles of sizes 1 µm to 100 µm account for 70–90% of the solid volume of particles. We expect that the results of this study will lead to improved estimates of mass and carbon flux in the study area.
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来源期刊
Elementa-Science of the Anthropocene
Elementa-Science of the Anthropocene Earth and Planetary Sciences-Atmospheric Science
CiteScore
6.90
自引率
5.10%
发文量
65
审稿时长
16 weeks
期刊介绍: A new open-access scientific journal, Elementa: Science of the Anthropocene publishes original research reporting on new knowledge of the Earth’s physical, chemical, and biological systems; interactions between human and natural systems; and steps that can be taken to mitigate and adapt to global change. Elementa reports on fundamental advancements in research organized initially into six knowledge domains, embracing the concept that basic knowledge can foster sustainable solutions for society. Elementa is published on an open-access, public-good basis—available freely and immediately to the world.
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