PP11A:
Subsurface and Subseasonal Productivity: Mechanisms, Magnitudes, Variability, and Key Species I
PP11A:
Subsurface and Subseasonal Productivity: Mechanisms, Magnitudes, Variability, and Key Species I
Subsurface and Subseasonal Productivity: Mechanisms, Magnitudes, Variability, and Key Species I
Session ID#: 11536
Session Description:
Our understanding of oceanic primary production and producers has been dominated by sampling of the surface ocean (typically < 20m). Similarly, our knowledge of global patterns of primary production has been led by ocean colour measurements from satellite sensors that again, have surface bias. During the 20th Century there were few systematic attempts to target the subsurface resulting in a gap dating back to Schimper’s pioneering use of closing nets on the 1898 Valdivia cruise. Over the past two decades, however, a burgeoning suite of observations has highlighted the significance of subsurface production. A range of mechanisms have been identified including the ability to grow in low light in subsurface chlorophyll maxima, exploitation of mixing events at the pycnocline/ nutricline, buoyancy regulation allowing the mining of deep nutrients. Significantly, new research is also demonstrating that this subsurface production may be of major significance for carbon export. With climate change driving increased ocean stratification, these styles of subsurface production may become more significant so it is timely to focus on them. This session will aim to bring together observation, theory and modelling of the subsurface to synergistically improve understanding and to identify new targets and priorities for research.
Primary Chair: Alan E S Kemp, University of Southampton, Southampton, SO14, United Kingdom
Chairs: Bror F Jonsson1, Tracy A Villareal2 and Joseph Salisbury II1, (1)University of New Hampshire, Durham, NH, United States(2)The University of Texas at Austin, Port Aransas, TX, United States
Moderators: Bror F Jonsson, University of New Hampshire, Durham, NH, United States and Alan E S Kemp, University of Southampton, Southampton, SO14, United Kingdom
Student Paper Review Liaison: Alan E S Kemp, University of Southampton, Southampton, SO14, United Kingdom
Index Terms:
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4855 Phytoplankton [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4858 Population dynamics and ecology [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Co-Sponsor(s):
- B - Biogeochemistry and Nutrients
- ME - Marine Ecosystems
- MM - Microbiology and Molecular Biology
- PC - Past, Present and Future Climate
Abstracts Submitted to this Session:
Primary Production and Photophysiology of Phytoplankton Forming Subsurface Chlorophyll Maxima in a UK Summer Stratified Coastal Sea (90316)
Inorganic Nutrient Diffusion at the Base of the Nutricline and its Association with the Deep Chlorophyll a Maximum Layer (90612)
Alterations in Location, Magnitude, and Community Composition of Discrete Layers of Phytoplankton in Cold, Deep Waters Near the 1% Isolume of the Laurentian Great Lake Michigan Among Years With Dramatically Different Meteorological Conditions (93649)
Seasonal Progression and Interannual Variability of Nutrient and Chlorophyll-a Distributions in the Northern Gulf of Alaska, 1998-2010 (93454)
See more of: Phytoplankton and Primary Production