Program and Agenda

Abstract

HIGH-FREQUENCY BIOGEOCHEMICAL MODELING BASED ON HOE-DYLAN EXPERIMENT AT STATION ALOHA

The Hawaii Ocean Experiment-DYNamics of Light And Nutrients (HOE-DYLAN) conducted high-frequency continuous sampling at Station ALOHA through the summer of 2012, providing an opportunity to study meso- and submeso-scale variability in marine biogeochemistry. We developed a biogeochemical model forced by the HOE-DYLAN data to study chlorophyll distribution, oxygen production and net community production. The model considered the physiological response of phytoplankton on different time scales to the vertical displacement of isopycnals. For instance, photosynthesis rate responses to the light field immediately, while the adaption of chlorophyll production occurs on a longer time scale. Two model frameworks were set up to investigate how the different frequency of isopycnal displacement can impact the model results: the "reference" framework relaxed the modeled temperature and salinity to the HOE-DYLAN Seaglider data with a time scale of 5 days, and the "high-frequency" framework directly adopts the Seaglider data. Preliminary results show that the high-frequency framework tends to generate a lower average chlorophyll. Our study illustrates the importance of including high-frequency physical fields when modeling marine biogeochemistry.

ePoster:

Authors

Luo, Y. W., Xiamen University, China, ywluo@xmu.edu.cn

Nicholson, D. P., Woods Hole Oceanographic Institution, USA, dnicholson@whoi.edu

Doney, S. C., Woods Hole Oceanographic Institution, USA, sdoney@whoi.edu

Details

Poster presentation

Session #:049
Date: 2/27/2014
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: No

PosterID: 2434