Ocean Color and Ocean Biogeochemistry
Plymouth Marine Laboratory, United Kingdom
Ocean color remains our only window into the pelagic ecosystem at synoptic scales. It is a rich source of data, and chlorophyll concentration is the principal product, which provides valuable information on how the light from the sun (the energy source for the entire ecosystem) is coupled to the marine biota through the pigments contained in phytoplankton. The absorbed energy is used by phytoplankton to produce organic carbon (marine primary production). We can combine light at the sea surface (another product available routinely using satellite data), with chlorophyll concentration from ocean color, to estimate marine primary production at the global scale, using models of light penetration, and photosynthesis. The growing list of satellite products includes phytoplankton functional types and phytoplankton size distribution. It is important to recognize that these products are not raw data. We arrive at them by combining various models with the satellite data on spectral radiance at multiple wavelengths in the visible domain, detected at the level of the satellite. Often, these models are different from, and employ different assumptions from, what is done by ecosystem models.
In this project, we propose to develop or improve novel satellite-based products, including phytoplankton functional types, particulate organic carbon, photosynthesis-irradiance parameters and phytoplankton carbon. These products, along with more standard products such as chlorophyll concentration and marine primary production, will form part of the CBIOMES data atlas. They will be used for comparison with ecosystem model outputs, and in data assimilation.
CBIOMES Collaborators in the Plymouth Group
News from the Sathyendranath Group
Shubha Sathyendranath, Trevor Platt, Žarko Kovač, James Dingle, Thomas Jackson, Robert J. W. Brewin, Peter Franks, Emilio Marañón, Gemma Kulk, and Heather A. Bouman (2020), Reconciling models of primary production and photo-acclimation, Applied Optics, doi: 10.1364/AO.386252...
Phytoplankton play a crucial role in ocean biology and climate. Understanding the natural processes that influence phytoplankton primary production, and how they are changing as the planet warms, is vital....
by Helen Hill for CBIOMES Changes in phytoplankton Chlorophyl (Chl) and phenology (study of the phases of the phytoplankton seasonal) are key to understanding many aspects of marine community structure...
by Helen Hill for CBIOMES A warm welcome to incoming researcher Dr Bror Jönsson, a new Senior Scientist in the PML CBIOMES Group. (more…)