Biological Oceanography Group

Francisco P. Chavez, Principal Investigator

We study the biology and chemistry of the ocean in relation to global change. How climate, ocean physics, marine chemistry, and ocean ecosystems co-vary on global to meso scales, and how this affects the temporal and spatial variability in phytoplankton biomass, composition and production.

The primary questions we seek to answer are:

What are the mean and fluctuating components of phytoplankton primary production, biomass and species composition on time scales ranging from days to years.
What are the physical, chemical and biological processes responsible for the mean and fluctuating components.
What controls primary production and phytoplankton growth rates.
What is the role of meso and macrozooplankton in coastal upwelling systems.
What is the fate of primary production?
What are the biological consequences of El Niño.

Focusing on the upper water column, we use instrumentation and systems for long-term ocean observing, such as satellite remote sensing, instrumented moorings and drifters, autonomous vehicles, and ships.

Glider and mooring data plots

Moorings float above the seafloor and can constantly take a variety of measurements, giving researchers a clear picture of oceanographic conditions.

depth vs time nitrate (uM) contour of bottle data from the CTD from the MBTS cruises

Monterey Bay Time Series Data

Summary graphs from the Monterey Bay Time Series (MBTS) CTD cruises. Includes physical, chemical, and biological samples. Updated quarterly.

Nitrate supply estimates in upwelling systems

A method combining in situ nitrate concentrations and satellite winds provides estimates of nitrate supply in coastal upwelling regions (available for download).

Global modes of sea surface temperature

A century-long EOF analysis of global sea surface temperature (SST) identified modes associated with regional climate phenomena. Plots and time series are updated monthly.