Article
 

Geostationary satellite observations of dynamic phytoplankton photophysiology

Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/articles/pr76f781n

Descriptions

Attribute NameValues
Creator
Abstract
  • Since June 2010, the Geostationary Ocean Color Imager (GOCI) has been collecting the first diurnally resolved satellite ocean measurements. Here GOCI retrievals of phytoplankton chlorophyll concentration and fluorescence are used to evaluate daily to seasonal changes in photophysiological properties. We focus on nonphotochemical quenching (NPQ) processes that protect phytoplankton from high light damage and cause strong diurnal cycles in fluorescence emission. This NPQ signal varies seasonally, with maxima in winter and minima in summer. Contrary to expectations from laboratory studies under constant light conditions, this pattern is highly consistent with an earlier conceptual model and recent field observations. The same seasonal cycle is registered in fluorescence data from the polar-orbiting Moderate Resolution Imaging Spectroradiometer Aqua satellite sensor. GOCI data reveal a strong correlation between mixed layer growth irradiance and fluorescence-derived phytoplankton photoacclimation state that can provide a path for mechanistically accounting for NPQ variability and, subsequently, retrieving information on iron stress in global phytoplankton populations.
  • Keywords: GOCI fluorescence, NPQ effects, Phytoplankton
Resource Type
DOI
Date Available
Date Issued
Citation
  • O'Malley, R. T., Behrenfeld, M. J., Westberry, T. K., Milligan, A. J., Shang, S., & Yan, J. (2014). Geostationary satellite observations of dynamic phytoplankton photophysiology. Geophysical Research Letters, 41(14), 5052-5059. doi:10.1002/2014GL060246
Journal Title
Journal Volume
  • 41
Journal Issue/Number
  • 14
Rights Statement
Funding Statement (additional comments about funding)
  • This study was supported by theNational Aeronautics and SpaceAdministration Ocean Biology andGeochemistry Program.
Publisher
Peer Reviewed
Language
Replaces

Relationships

Parents:

This work has no parents.

Items

Thumbnail Title Date Uploaded Visibility Actions
file details O'MalleyRobertBotanyPlantPathologyGeostationarySatelliteObservations.pdf 10/27/2017 Public
file details O'MalleyRobertBotanyPlantPathologyGeostationarySatelliteObservations_SupportingInformation.zip 10/27/2017 Public