Regional to global assessments of phytoplankton dynamics from the SeaWiFS mission
Photosynthetic production of organic matter by microscopic oceanic phytoplankton fuels ocean ecosystems and contributes roughly half of the Earth's net primary production. For 13 years, the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) mission provided the first consistent, synoptic observati...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal Article |
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Elsevier Science Inc.
2013
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/34412 |
| _version_ | 1848754215557529600 |
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| author | Siegel, D. Behrenfeld, M. Maritorena, S. McClain, C. Antoine, David Bailey, S. Bontempi, P. Boss, E. Dierssen, H. Doney, S. Eplee, R. Evans, R. Feldman, G. Fields, E. Franz, B. Kuring, N. Mengelt, C. Nelson, N. Patt, F. Robinson, W. Sarmiento, J. Swan, C. Werdell, P. Westberry, T. Wilding, J. Yoder, J. |
| author_facet | Siegel, D. Behrenfeld, M. Maritorena, S. McClain, C. Antoine, David Bailey, S. Bontempi, P. Boss, E. Dierssen, H. Doney, S. Eplee, R. Evans, R. Feldman, G. Fields, E. Franz, B. Kuring, N. Mengelt, C. Nelson, N. Patt, F. Robinson, W. Sarmiento, J. Swan, C. Werdell, P. Westberry, T. Wilding, J. Yoder, J. |
| author_sort | Siegel, D. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Photosynthetic production of organic matter by microscopic oceanic phytoplankton fuels ocean ecosystems and contributes roughly half of the Earth's net primary production. For 13 years, the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) mission provided the first consistent, synoptic observations of global ocean ecosystems. Changes in the surface chlorophyll concentration, the primary biological property retrieved from SeaWiFS, have traditionally been used as a metric for phytoplankton abundance and its distributionlargely reflects patterns in vertical nutrient transport. On regional to global scales, chlorophyll concentrations covary with sea surface temperature (SST) because SST changes reflect light and nutrient conditions. However, the oceanmay be too complex to be well characterized using a single index such as the chlorophyll concentration. A semi-analytical bio-optical algorithm is used to help interpret regional to global SeaWiFS chlorophyll observations from using three independent, well-validated ocean color data products; the chlorophyll a concentration, absorption by CDM and particulate backscattering.First, we show that observed long-term, global-scale trends in standard chlorophyll retrievals are likely compromised by coincident changes in CDM. Second, we partition the chlorophyll signal into a component due to phytoplankton biomass changes and a component caused by physiological adjustments in intracellular chlorophyll concentrations to changes in mixed layer light levels. We show that biomass changes dominate chlorophyll signals for the high latitude seas and where persistent vertical upwelling is known to occur, while physiological processes dominate chlorophyll variability over much of the tropical and subtropical oceans. The SeaWiFS data set demonstrates complexity in the interpretation of changes in regional to global phytoplankton distributions and illustrates limitations for the assessment of phytoplankton dynamics using chlorophyll retrievals alone. |
| first_indexed | 2025-11-14T08:36:52Z |
| format | Journal Article |
| id | curtin-20.500.11937-34412 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:36:52Z |
| publishDate | 2013 |
| publisher | Elsevier Science Inc. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-344122017-09-13T15:14:33Z Regional to global assessments of phytoplankton dynamics from the SeaWiFS mission Siegel, D. Behrenfeld, M. Maritorena, S. McClain, C. Antoine, David Bailey, S. Bontempi, P. Boss, E. Dierssen, H. Doney, S. Eplee, R. Evans, R. Feldman, G. Fields, E. Franz, B. Kuring, N. Mengelt, C. Nelson, N. Patt, F. Robinson, W. Sarmiento, J. Swan, C. Werdell, P. Westberry, T. Wilding, J. Yoder, J. Phytoplankton SeaWiFS Decadal trends Colored dissolved organic matter Ocean color Photosynthetic production of organic matter by microscopic oceanic phytoplankton fuels ocean ecosystems and contributes roughly half of the Earth's net primary production. For 13 years, the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) mission provided the first consistent, synoptic observations of global ocean ecosystems. Changes in the surface chlorophyll concentration, the primary biological property retrieved from SeaWiFS, have traditionally been used as a metric for phytoplankton abundance and its distributionlargely reflects patterns in vertical nutrient transport. On regional to global scales, chlorophyll concentrations covary with sea surface temperature (SST) because SST changes reflect light and nutrient conditions. However, the oceanmay be too complex to be well characterized using a single index such as the chlorophyll concentration. A semi-analytical bio-optical algorithm is used to help interpret regional to global SeaWiFS chlorophyll observations from using three independent, well-validated ocean color data products; the chlorophyll a concentration, absorption by CDM and particulate backscattering.First, we show that observed long-term, global-scale trends in standard chlorophyll retrievals are likely compromised by coincident changes in CDM. Second, we partition the chlorophyll signal into a component due to phytoplankton biomass changes and a component caused by physiological adjustments in intracellular chlorophyll concentrations to changes in mixed layer light levels. We show that biomass changes dominate chlorophyll signals for the high latitude seas and where persistent vertical upwelling is known to occur, while physiological processes dominate chlorophyll variability over much of the tropical and subtropical oceans. The SeaWiFS data set demonstrates complexity in the interpretation of changes in regional to global phytoplankton distributions and illustrates limitations for the assessment of phytoplankton dynamics using chlorophyll retrievals alone. 2013 Journal Article http://hdl.handle.net/20.500.11937/34412 10.1016/j.rse.2013.03.025 Elsevier Science Inc. fulltext |
| spellingShingle | Phytoplankton SeaWiFS Decadal trends Colored dissolved organic matter Ocean color Siegel, D. Behrenfeld, M. Maritorena, S. McClain, C. Antoine, David Bailey, S. Bontempi, P. Boss, E. Dierssen, H. Doney, S. Eplee, R. Evans, R. Feldman, G. Fields, E. Franz, B. Kuring, N. Mengelt, C. Nelson, N. Patt, F. Robinson, W. Sarmiento, J. Swan, C. Werdell, P. Westberry, T. Wilding, J. Yoder, J. Regional to global assessments of phytoplankton dynamics from the SeaWiFS mission |
| title | Regional to global assessments of phytoplankton dynamics from the SeaWiFS mission |
| title_full | Regional to global assessments of phytoplankton dynamics from the SeaWiFS mission |
| title_fullStr | Regional to global assessments of phytoplankton dynamics from the SeaWiFS mission |
| title_full_unstemmed | Regional to global assessments of phytoplankton dynamics from the SeaWiFS mission |
| title_short | Regional to global assessments of phytoplankton dynamics from the SeaWiFS mission |
| title_sort | regional to global assessments of phytoplankton dynamics from the seawifs mission |
| topic | Phytoplankton SeaWiFS Decadal trends Colored dissolved organic matter Ocean color |
| url | http://hdl.handle.net/20.500.11937/34412 |