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Three improved satellite chlorophyll algorithms for the Southern Ocean


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]


Copyright Statement

Copyright 2013 American Geophysical Union

DOI: doi:10.1002/jgrc.20270


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 (20-160 degree E) 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:Environmental Management
Objective Group:Management of Antarctic and Southern Ocean environments
Objective Field:Biodiversity in Antarctic and Southern Ocean environments
UTAS Author:Johnson, R (Dr Robert Johnson)
UTAS Author:Strutton, PG (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:129
Deposited By:IMAS Research and Education Centre
Deposited On:2013-09-17
Last Modified:2022-08-30
Downloads:390 View Download Statistics

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