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Global Ocean Primary Production Trends in the Modern Ocean Color Satellite Record (1998–2015) by Gregg, Watson W; Rousseaux, Cecile S is a Environmental Science article available to read on EtoBox.

What is Global Ocean Primary Production Trends in the Modern Ocean Color Satellite Record (1998–2015) about?

Abstract Ocean primary production (PP), representing the uptake of inorganic carbon through photosynthesis, supports marine life and affects carbon exchange with the atmosphere. It is difficult to ascertain its magnitude, variability, and trends due to our inability to measure it directly at large scales. Yet it is paramount for understanding changes in marine health, fisheries, and the global carbon cycle. Using assimilation of ocean color satellite data into an ocean biogeochemical model, we estimate that global net ocean PP has experienced a small but significant decline −0.8 PgC y−1 (−2.1%) decade−1 (P < 0.05) in the 18-year satellite record from 1998 to 2015. This decline is associated with shallowing surface mixed layer depth (−2.4% decade−1) and decreasing nitrate concentrations (−3.2% decade−1). Relative contributions to PP by various types of ocean phytoplankton have changed, with decreases in production by intermediate-sized phytoplankton represented by chlorophytes (−14.3% decade−1). This is partially compensated by increases from the unique, more nutrient-efficient, coccolithophores (8.4% decade−1). Geographically, the North and Equatorial Indian Oceans are responsible

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Author

Gregg, Watson W; Rousseaux, Cecile S

Publisher

Institute of Physics; IOP Publishing; Institute of Physics Publishing; [Bristol U.K].: Institute of Physics and IOP Publishing (ISSN 1748-9326)

Published

2019

Language

EN

Field

Environmental Science (Physical Sciences)