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Uncertainty and sensitivity in optode-based shelf-sea net community production estimates.
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- Author(s): Hull, T.; Greenwood, N.; Kaiser, J.; Johnson, M.
- Source:
Biogeosciences Discussions; 2015, Vol. 12 Issue 18, p15611-15654, 44p, 1 Color Photograph, 2 Charts, 10 Graphs- Subject Terms:
- Source:
- Additional Information
- Abstract: Coastal seas represent one of the most valuable and vulnerable habitats on Earth. Understanding biological productivity in these dynamic regions is vital to understanding how they may influence and be affected by climate change. A key metric to this end is net community production (NCP), the net effect of autotrophy and hetrotrophy, however accurate estimation of NCP has proved to be a difficult task. Presented here is a thorough exploration and sensitivity analysis of an oxygen mass-balance based NCP estimation technique applied to the Warp Anchorage monitoring station which is a permanently well mixed shallow area within the Thames river plume. We have developed an open source software package for calculating NCP estimates and air-sea gas flux. Our study site is identified as a region of net heteotrophy with strong seasonal variability. The annual cumulative net community oxygen production is calculated as (-5 ± 2.5) mol m-2 a-1. Short term daily variability in oxygen is demonstrated to make accurate individual daily estimates challenging. The effects of bubble induced supersaturation is shown to have a large influence on cumulative annual estimates, and is the source of much uncertainty. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Biogeosciences Discussions is the property of Copernicus Gesellschaft mbH and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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