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Three improved satellite chlorophyll algorithms for the Southern Ocean
Citation
Johnson, R and Strutton, PG and Wright, SW and McMinn, A and Meiners, K, Three improved satellite chlorophyll algorithms for the Southern Ocean, Journal of Geophysical Research: Oceans, 118, (7) pp. 3694-3703. ISSN 2169-9275 (2013) [Refereed Article]
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Copyright Statement
Copyright 2013 American Geophysical Union
Abstract
Remote sensing of Southern Ocean chlorophyll concentrations is the most effective way
to detect large-scale changes in phytoplankton biomass driven by seasonality and climate
change. However, the current algorithms for the Sea-viewing Wide Field-of-view Sensor
(SeaWiFS, algorithm OC4v6), the Moderate Resolution Imaging Spectroradiometer
(MODIS-Aqua, algorithm OC3M), and GlobColour significantly underestimate chlorophyll
concentrations at high latitudes. Here, we use a long-term data set from the Southern Ocean
(20–160E) to develop more accurate algorithms for all three of these products in southern
high-latitude regions. These new algorithms improve in situ versus satellite chlorophyll
coefficients of determination (r2) from 0.27 to 0.46, 0.26 to 0.51, and 0.25 to 0.27, for
OC4v6, OC3M, and GlobColour, respectively, while addressing the underestimation
problem. This study also revealed that pigment composition, which reflects species
composition and physiology, is key to understanding the reasons for satellite chlorophyll
underestimation in this region. These significantly improved algorithms will permit more
accurate estimates of standing stocks and more sensitive detection of spatial and temporal
changes in those stocks, with consequences for derived products such as primary production
and carbon cycling.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | chlorophyll algorithm satellite Southern Ocean |
| Research Division: | Biological Sciences |
| Research Group: | Ecology |
| Research Field: | Marine and Estuarine Ecology (incl. Marine Ichthyology) |
| Objective Division: | Environment |
| Objective Group: | Flora, Fauna and Biodiversity |
| Objective Field: | Antarctic and Sub-Antarctic Flora, Fauna and Biodiversity |
| UTAS Author: | Johnson, R (Dr Robert Johnson) |
| UTAS Author: | Strutton, PG (Associate Professor Peter Strutton) |
| UTAS Author: | Wright, SW (Dr Simon Wright) |
| UTAS Author: | McMinn, A (Professor Andrew McMinn) |
| UTAS Author: | Meiners, K (Dr Klaus Meiners) |
| ID Code: | 86461 |
| Year Published: | 2013 |
| Web of Science® Times Cited: | 75 |
| Deposited By: | IMAS Research and Education Centre |
| Deposited On: | 2013-09-17 |
| Last Modified: | 2016-12-06 |
| Downloads: | 248 View Download Statistics |
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