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dc.contributor.author
Słomka, Jonasz
dc.contributor.author
Stocker, Roman
dc.date.accessioned
2020-07-09T11:38:28Z
dc.date.available
2020-07-09T05:06:06Z
dc.date.available
2020-07-09T11:38:28Z
dc.date.issued
2020-06-26
dc.identifier.issn
0031-9007
dc.identifier.issn
1079-7114
dc.identifier.other
10.1103/PhysRevLett.124.258001
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/425357
dc.identifier.doi
10.3929/ethz-b-000425357
dc.description.abstract
Under favorable conditions, microscopic phytoplankton cells dwelling in the oceans can divide rapidly and reach high concentrations, forming blooms that span kilometers and last for weeks. When blooms collapse, dead cells settle and aggregate into “marine snow” particles, resulting in a large and climatically important vertical flux of carbon from the ocean surface to its depth, a process known as the “biological pump.” To date, the formation of marine snow has been modeled as coagulation between spherical particles driven by gravitational settling and turbulent mixing, characterized by coagulation dynamics that converge onto time-independent concentrations of aggregates. However, many phytoplankton species are elongated and how their rodlike shape affects the aggregation process has remained unknown. Here, we study marine snow formation in a quiescent fluid assuming the constituent particles are elongated and form bundles upon encounter. We derive the collision kernel between dissimilar rods settling under gravity and discover that the most frequent collisions occur between the thinnest and thickest bundles, rather than between bundles of similar size. As a consequence, in the full coagulation model that combines exponential growth with settling, the thin-thick coupling can lead to statistically stationary states where the concentrations of aggregates of different size oscillate in time, exhibiting periodic bursts. The bursts are predicted to occur on the scale of a week and eventually lead to broadening of aggregate size spectra and may thus be highly relevant for plankton dynamics and the carbon cycle in the ocean.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
American Physical Society
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Bursts Characterize Coagulation of Rods in a Quiescent Fluid
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2020-06-24
ethz.journal.title
Physical Review Letters
ethz.journal.volume
124
en_US
ethz.journal.issue
25
en_US
ethz.journal.abbreviated
Phys. Rev. Lett.
ethz.pages.start
258001
en_US
ethz.size
6 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
The effect of high-frequency nutrient fluctuations on bacterial growth
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
New York, NY
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02608 - Institut für Umweltingenieurwiss. / Institute of Environmental Engineering::09467 - Stocker, Roman / Stocker, Roman
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02608 - Institut für Umweltingenieurwiss. / Institute of Environmental Engineering::09467 - Stocker, Roman / Stocker, Roman
ethz.grant.agreementno
176189
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Projekte Lebenswissenschaften
ethz.date.deposited
2020-07-09T05:06:10Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-07-09T11:38:41Z
ethz.rosetta.lastUpdated
2024-02-02T11:23:37Z
ethz.rosetta.versionExported
true
ethz.COinS
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