Uncertainty Management in Coupled Physical-Biological Lower Trophic Level Ocean Ecosystem Models

Advances in Physical, Biological, and Coupled Ocean Models During the US GLOBEC Program

Did the iron fertilization near Haida Gwaii in 2012 affect the pelagic lower trophic level ecosystem?

Deliberate fertilization of a patch of water west of Haida Gwaii, British Columbia, with iron sulphate and oxide occurred in summer 2012 and triggered a phytoplankton bloom strongly visible in satellite imagery in late August and detectable through September 2012. Routine sampling by the Continuous Plankton Recorder Survey from commercial ships occurred in the vicinity of the fertilized patch b...

Seasonal Variation in Lower Trophic Level Ecosystem of Hakata Bay, Japan

The seasonal variation in lower trophic level ecosystem of Hakata Bay, Japan is investigated using observed data from April 1993 to March 1994 and a numerical ecosystem model. Primary production was largest in September 1993 due to high DIP concentration but secondary production was largest in August 1993 due to high water temperature. Yearly averaged primary production in Hakata Bay is larger ...

Characterization of Ocean Productivity Using a New Physical-Biological Coupled Ocean Model

Abstract. A lower-trophic marine ecosystem model that takes into account both the grazing food web and the microbial food web has been developed to investigate the ocean carbon cycle. The ecosystem model was coupled to an oceanic general circulation model and a simulation was performed to examine the temporal and spatial distribution of primary production in the world ocean. Monthly-mean-based ...

A nitrate and silicate budget in the equatorial Pacific Ocean: a coupled physical–biological model study

A coupled physical–biological model was developed to simulate the low-silicate, high-nitrate, and low-chlorophyll (LSHNLC) conditions in the equatorial Pacific Ocean and used to compute a detailed budget in the Wyrtki box (5 N– 5 S; 180–90 W) for the major sources and cycling of nitrogen and silicon in the equatorial Pacific. With the incorporation of biogenic silicon dissolution, NH4 regenerat...