Effects of Ocean Acidification on the Ballast of Surface Aggregates Sinking through the Twilight Zone: settling velocity and particle size ...

Incubation SetupThe aggregates were placed inside the settling microcosm. The microcosm was filled with GF/F filtered, artificial seawater (32 psu) with a carbonate chemistry adjusted to the present or future conditions. This reduced the biological activity to the community originally present in the...

Full description

Bibliographic Details
Main Authors: Mendes, Pedro André, Thomsen, Laurenz
Format: Dataset
Language:English
Published: PANGAEA 2015
Subjects:
Carbon dioxide, partial pressure
Sample code/label
Size
Sinking velocity
Sinking velocity, standard deviation
Size fraction
Standard deviation
Biological Impacts of Ocean Acidification BIOACID
Ocean acidification
Online Access:https://dx.doi.org/10.1594/pangaea.846487
https://doi.pangaea.de/10.1594/PANGAEA.846487
Description
Summary:Incubation SetupThe aggregates were placed inside the settling microcosm. The microcosm was filled with GF/F filtered, artificial seawater (32 psu) with a carbonate chemistry adjusted to the present or future conditions. This reduced the biological activity to the community originally present in the aggregates. The microcosm was continuously pressurized at a rate of 30 MPa/day, until it reached 10 MPa, the equivalent to a depth of 1000 m. The full incubation lasted 80 h. The experiment was triplicated at a pCO2 of 380 µatm and 1100 µatm. Additional incubations of similar duration were done at atmospheric pressure, with triplicates at a pCO2 of 380 µatm and 1100 µatm. These aimed at isolating the effect of the increase in hydrostatic pressure.Determination of Particle Size and Settling Velocity (ws)A Laser In Situ Scattering and Transmissiometry device (LISST-100X) was used to measure the variations in particle size distribution of the model aggregates before and after the incubations. The particle size vs. ...

Similar Items