A novel method to study the fragmentation behavior of marine snow aggregates in controlled shear flow
A novel method to study the fragmentation behavior of marine snow aggregates in controlled shear flow
复制标题
一种研究受控剪切流中海洋雪聚集体破碎行为的新方法
DOI:
10.1002/lom3.10509
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Rau, Matthew J.
中科院分区:
文献类型:
--
作者:
Song, Yixuan;Rau, Matthew J.
The sinking of marine aggregates impacts the global carbon cycle as it is one of the primary sources of carbon export from the surface ocean. Aggregation and fragmentation alter the size of aggregates, which governs their sinking speed. Although aggregation theory is well established, aggregate fragmentation strength and breakup characteristics are less well understood. This study developed a cylindrical tank that formed and then exposed diatom aggregates to calibrated laminar shear through a combined rotating and oscillating motion. The shear rate was predictable using a developed analytical solution for the fluid motion within the tank. Under proper operating conditions, this facility provided fluid shear with a similar magnitude to that in multiple ocean environments. We also developed a unique image processing method that enabled continuous tracking of particles' position, size, and morphology as well as determination of the individual aggregate breakup events. The method has great potential to capture breakup events of large marine snow particles, quantify the aggregate morphological changes leading up to and at breakup, and provide data sufficient for statistical analysis of laboratory aggregate populations. We tested the method using laboratory‐culturedOdontella auritaand captured 79 breakup events of the resulting aggregates. These fragmented aggregates ranged from 1 to 5 mm in major axis length and underwent substantial morphological evolutions prior to the fragmentation.
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DOI:
10.1115/ajkfluids2019-5499
发表时间:
2019
期刊:
Proceedings of the ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference
影响因子:
--
作者:
Song, Yixuan;Rau, Matthew J.
通讯作者:
Rau, Matthew J.
DOI:
10.1016/0967-0637(94)90089-2
发表时间:
1994
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
G. Jackson
通讯作者:
G. Jackson
影响因子:
4.5
作者:
Fuchs, HL;Mullineaux, LS;Solow, AR
通讯作者:
Solow, AR
DOI:
10.1007/978-1-4757-3296-2_7
发表时间:
2020-02
期刊:
Definitions
影响因子:
--
作者:
Nina Zahrai
通讯作者:
Nina Zahrai
DOI:
10.1021/la502686b
发表时间:
2014-11
期刊:
Langmuir : the ACS journal of surfaces and colloids
影响因子:
--
作者:
D. Saha;M. Šoóš;B. Lüthi;M. Holzner;Alexander Liberzon;M. Babler;W. Kinzelbach
通讯作者:
D. Saha;M. Šoóš;B. Lüthi;M. Holzner;Alexander Liberzon;M. Babler;W. Kinzelbach