Surface chlorophyll concentrations in relation to the Antarctic Polar Front: seasonal and spatial patterns from satellite observations
Satellite ocean color data from the Sea Viewing Wide Field of View Sensor (SeaWiFS) are used to investigate phytoplankton bloom dynamics at the Antarctic Polar Front (PF). Satellite sea surface temperature (SST) data are used to map the location of the PF at weekly timescales. Elevated chlorophyll w...
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Online Access: | https://escholarship.org/uc/item/5bp54127 https://escholarship.org/content/qt5bp54127/qt5bp54127.pdf https://doi.org/10.1016/s0924-7963(02)00196-3 |
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ftcdlib:oai:escholarship.org:ark:/13030/qt5bp54127 2024-09-15T17:46:53+00:00 Surface chlorophyll concentrations in relation to the Antarctic Polar Front: seasonal and spatial patterns from satellite observations Moore, J Keith Abbott, Mark R 69 - 86 2002-11-01 application/pdf https://escholarship.org/uc/item/5bp54127 https://escholarship.org/content/qt5bp54127/qt5bp54127.pdf https://doi.org/10.1016/s0924-7963(02)00196-3 unknown eScholarship, University of California qt5bp54127 https://escholarship.org/uc/item/5bp54127 https://escholarship.org/content/qt5bp54127/qt5bp54127.pdf doi:10.1016/s0924-7963(02)00196-3 CC-BY Journal of Marine Systems, vol 37, iss 1-3 Prevention phytoplankton southern ocean mesoscale Oceanography article 2002 ftcdlib https://doi.org/10.1016/s0924-7963(02)00196-3 2024-06-28T06:28:20Z Satellite ocean color data from the Sea Viewing Wide Field of View Sensor (SeaWiFS) are used to investigate phytoplankton bloom dynamics at the Antarctic Polar Front (PF). Satellite sea surface temperature (SST) data are used to map the location of the PF at weekly timescales. Elevated chlorophyll within the PF often appears as a narrow band that occupies only a portion of the SST gradient across the PF. Phytoplankton blooms within the PF occur most frequently during the month of December and are unevenly distributed within the Southern Ocean. Elevated chlorophyll concentrations at the PF are most frequently observed where the current is interacting with large topographic features. Mesoscale physical processes, including meander-induced upwelling and increased eddy mixing, where the PF encounters large topographic features likely leads to increased nutrient flux to surface waters in these regions. The highest mean chlorophyll values associated with the PF occur where the front comes into contact with relatively shallow waters along the North Scotia Ridge and at Kerguelen Plateau. Iron input from sedimentary sources likely plays an important role in these regions. Over seasonal timescales it appears likely that light-limitation prevents phytoplankton blooms at the PF during winter and spring months. PF blooms are observed most commonly during December when surface radiation peaks and mixed layer depths are rapidly shoaling. Even during December, when the light regime would seem to be favorable, PF blooms are largely restricted to regions where enhanced nutrient fluxes to surface waters due to frontal dynamics are likely. During late summer, nutrient limitation due to depletion of iron and possibly silicate largely prevent blooms at the PF. In the fall, deepening mixed layers would provide some relief from nutrient limitation but likely lead again to light-limitation of growth rates and the prevention of blooms. © 2002 Elsevier Science B.V. All rights reserved. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean University of California: eScholarship Journal of Marine Systems 37 1-3 69 86 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Prevention phytoplankton southern ocean mesoscale Oceanography |
spellingShingle |
Prevention phytoplankton southern ocean mesoscale Oceanography Moore, J Keith Abbott, Mark R Surface chlorophyll concentrations in relation to the Antarctic Polar Front: seasonal and spatial patterns from satellite observations |
topic_facet |
Prevention phytoplankton southern ocean mesoscale Oceanography |
description |
Satellite ocean color data from the Sea Viewing Wide Field of View Sensor (SeaWiFS) are used to investigate phytoplankton bloom dynamics at the Antarctic Polar Front (PF). Satellite sea surface temperature (SST) data are used to map the location of the PF at weekly timescales. Elevated chlorophyll within the PF often appears as a narrow band that occupies only a portion of the SST gradient across the PF. Phytoplankton blooms within the PF occur most frequently during the month of December and are unevenly distributed within the Southern Ocean. Elevated chlorophyll concentrations at the PF are most frequently observed where the current is interacting with large topographic features. Mesoscale physical processes, including meander-induced upwelling and increased eddy mixing, where the PF encounters large topographic features likely leads to increased nutrient flux to surface waters in these regions. The highest mean chlorophyll values associated with the PF occur where the front comes into contact with relatively shallow waters along the North Scotia Ridge and at Kerguelen Plateau. Iron input from sedimentary sources likely plays an important role in these regions. Over seasonal timescales it appears likely that light-limitation prevents phytoplankton blooms at the PF during winter and spring months. PF blooms are observed most commonly during December when surface radiation peaks and mixed layer depths are rapidly shoaling. Even during December, when the light regime would seem to be favorable, PF blooms are largely restricted to regions where enhanced nutrient fluxes to surface waters due to frontal dynamics are likely. During late summer, nutrient limitation due to depletion of iron and possibly silicate largely prevent blooms at the PF. In the fall, deepening mixed layers would provide some relief from nutrient limitation but likely lead again to light-limitation of growth rates and the prevention of blooms. © 2002 Elsevier Science B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Moore, J Keith Abbott, Mark R |
author_facet |
Moore, J Keith Abbott, Mark R |
author_sort |
Moore, J Keith |
title |
Surface chlorophyll concentrations in relation to the Antarctic Polar Front: seasonal and spatial patterns from satellite observations |
title_short |
Surface chlorophyll concentrations in relation to the Antarctic Polar Front: seasonal and spatial patterns from satellite observations |
title_full |
Surface chlorophyll concentrations in relation to the Antarctic Polar Front: seasonal and spatial patterns from satellite observations |
title_fullStr |
Surface chlorophyll concentrations in relation to the Antarctic Polar Front: seasonal and spatial patterns from satellite observations |
title_full_unstemmed |
Surface chlorophyll concentrations in relation to the Antarctic Polar Front: seasonal and spatial patterns from satellite observations |
title_sort |
surface chlorophyll concentrations in relation to the antarctic polar front: seasonal and spatial patterns from satellite observations |
publisher |
eScholarship, University of California |
publishDate |
2002 |
url |
https://escholarship.org/uc/item/5bp54127 https://escholarship.org/content/qt5bp54127/qt5bp54127.pdf https://doi.org/10.1016/s0924-7963(02)00196-3 |
op_coverage |
69 - 86 |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Journal of Marine Systems, vol 37, iss 1-3 |
op_relation |
qt5bp54127 https://escholarship.org/uc/item/5bp54127 https://escholarship.org/content/qt5bp54127/qt5bp54127.pdf doi:10.1016/s0924-7963(02)00196-3 |
op_rights |
CC-BY |
op_doi |
https://doi.org/10.1016/s0924-7963(02)00196-3 |
container_title |
Journal of Marine Systems |
container_volume |
37 |
container_issue |
1-3 |
container_start_page |
69 |
op_container_end_page |
86 |
_version_ |
1810495311994421248 |