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.
Luo, Y. W., Xiamen University, China, email@example.com
Nicholson, D. P., Woods Hole Oceanographic Institution, USA, firstname.lastname@example.org
Doney, S. C., Woods Hole Oceanographic Institution, USA, email@example.com
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall
Presentation is given by student: No