Published in Marine Chemistry, 2024
In this paper, we quantify the in-situ particulate carbon and silica fluxes of a post-bloom North Atantic using thorium-234.
Published in Biogeosciences, 2022
Here we explain the contrast between the subpolar NE Pacific and the transition zone to the south of it using a global ocean biogeochemical model (MOM6-COBALT) with Argo float and ship-based observations to investigate how MHWs influence marine productivity.
Published in Elementa: Science of the Anthropocene, 2021
Fluxes of major bioelements associated with sinking particles were quantified in late summer 2018 as part of the EXport Processes in the Ocean from RemoTe Sensing (EXPORTS) field campaign near Ocean Station Papa in the subarctic northeast Pacific. The thorium-234 method was used in conjunction with size-fractionated (1–5, 5–51, and >51 mm) concentrations of particulate nitrogen (PN), total particulate phosphorus (TPP), biogenic silica (bSi), and particulate inorganic carbon (PIC) collected using large volume filtration via in situ pumps.
Published in Elementa: Science of the Anthropocene, 2020
More than 950 measurements of thorium-234, the naturally occurring radionuclide used as a tracer of sinking particle flux, were made during August–September 2018 at Ocean Station Papa in the northeast Pacific Ocean. High-resolution vertical sampling enabled observations of the spatial and temporal evolution of particle flux in Lagrangian fashion. This work sets the foundation for understanding controls on the biological carbon pump during this EXPORTS campaign.