November 2021: Measuring Phosphate in Monterey Bay

Max Grand and Marine Lebrec recently sailed aboard the R/V Martin where they successfully ran underway surface phosphate samples in Monterey Bay using programmable Flow Injection (pFI) analysis. These continuous measurements were taken from station M1 located at the edge of Monterey Bay all the way to Moss Landing Harbor. Max and Marine also collected seawater samples from a deep 1000m CTD cast at the offshore M1 station, which allowed them to characterize phosphate concentrations throughout the water column. This cruise served as validation that phosphate analysis using their miniaturized nutrient analyzer (pFI) can be run in-situ on a ship.

October 2021: Field Work on Santa Catalina Island

Jessica Metter recently went to USC’s Wrigley Marine Science Center on Catalina Island to collect seaweeds from the genus Asparagopsis, which are the leading candidates for enteric methane reduction in cattle. After collecting the seaweed, Jessica conducted experiments at the Wrigley Marine Science Center to measure the bromocarbon production rate of Asparagopsis using bottle incubations. This data will be used as part of a larger data set to estimate the amount of bromocarbons released to the atmosphere by current and future seaweed aquaculture in California and beyond.

International Nutrient Inter-Comparison Voyage

Chemical oceanography lab PI Max Grand and graduate student Marine Lebrec will take part in the International Nutrient Inter-comparison Voyage departing Hobart in spring 2023. The purpose of this cruise will be for Max and Marine to analyze nutrient samples (phosphate, silicate) in the Southern Ocean using their newly developed methods using programmable Flow Injection (pFI) analysis. They will be able to compare these methods to different shipboard methodologies with the aim of reducing error between different international laboratories.