Oceanic Light Absorption Properties: Assessment and Characterization in the Southeastern Bering Sea Using Field and Satellite Observations
In recent decades the Bering Sea has been subjected to large climatic variability with cascading consequences on its productive marine ecosystem. Long-term as well as short-term monitoring is essential if we are to maintain its capability to supply the resources on which the national and local econo...
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ftlouisianastuir:oai:digitalcommons.lsu.edu:gradschool_dissertations-1767 2023-06-11T04:10:38+02:00 Oceanic Light Absorption Properties: Assessment and Characterization in the Southeastern Bering Sea Using Field and Satellite Observations Naik, Puneeta Suresh 2011-01-01T08:00:00Z application/pdf https://digitalcommons.lsu.edu/gradschool_dissertations/768 https://doi.org/10.31390/gradschool_dissertations.768 https://digitalcommons.lsu.edu/context/gradschool_dissertations/article/1767/viewcontent/uc.pdf unknown LSU Digital Commons https://digitalcommons.lsu.edu/gradschool_dissertations/768 doi:10.31390/gradschool_dissertations.768 https://digitalcommons.lsu.edu/context/gradschool_dissertations/article/1767/viewcontent/uc.pdf LSU Doctoral Dissertations CDOM phytoplankton absorption ocean color Bering Sea non-algal particulate matter Oceanography and Atmospheric Sciences and Meteorology text 2011 ftlouisianastuir https://doi.org/10.31390/gradschool_dissertations.768 2023-05-28T19:08:05Z In recent decades the Bering Sea has been subjected to large climatic variability with cascading consequences on its productive marine ecosystem. Long-term as well as short-term monitoring is essential if we are to maintain its capability to supply the resources on which the national and local economy depend. Remote sensing together with in-situ and laboratory measurements of physical, biological and optical properties have considerable potential for monitoring and measuring the effects of climate-driven changes on this ecosystem. A major shortcoming to obtain accurate estimates of optically active components (such as colored dissolved organic matter, non-algal particulate matter, and phytoplankton) from ocean color remote sensors has been the lack of in-situ bio-optical data in the Bering Sea. To address this issue, the central part of this dissertation was to i) assess phytoplankton absorption of culture and seawater samples using spectrophotometric and pigment reconstruction methods and ii) obtain a suite of in-water measurements for characterization and parameterization of light absorption properties in the southeastern Bering Sea. One of the main objectives was to assess the bio-optical models and parameterizations currently used in satellite algorithms for the southeastern Bering Sea, which were found to be inapplicable in these waters due to the dominant contribution by CDOM absorption. The CDOM absorption accounted for greater than 50% of the diffuse light attenuation coefficient and caused the remote sensing reflectance to be lower, more in the blue than the green region of the visible spectrum, causing the blue to green reflectance ratios to decrease by a factor of ~2. The lower specific absorption relative to lower and middle latitudes indicated significant pigment packaging and/or change in pigment composition which was consistent with variability in phytoplankton community structure. These results suggested the need for developing regional algorithms and parameterizations; regional empirical ... Text Bering Sea LSU Digital Commons (Louisiana State University) Bering Sea |
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LSU Digital Commons (Louisiana State University) |
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ftlouisianastuir |
language |
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CDOM phytoplankton absorption ocean color Bering Sea non-algal particulate matter Oceanography and Atmospheric Sciences and Meteorology |
spellingShingle |
CDOM phytoplankton absorption ocean color Bering Sea non-algal particulate matter Oceanography and Atmospheric Sciences and Meteorology Naik, Puneeta Suresh Oceanic Light Absorption Properties: Assessment and Characterization in the Southeastern Bering Sea Using Field and Satellite Observations |
topic_facet |
CDOM phytoplankton absorption ocean color Bering Sea non-algal particulate matter Oceanography and Atmospheric Sciences and Meteorology |
description |
In recent decades the Bering Sea has been subjected to large climatic variability with cascading consequences on its productive marine ecosystem. Long-term as well as short-term monitoring is essential if we are to maintain its capability to supply the resources on which the national and local economy depend. Remote sensing together with in-situ and laboratory measurements of physical, biological and optical properties have considerable potential for monitoring and measuring the effects of climate-driven changes on this ecosystem. A major shortcoming to obtain accurate estimates of optically active components (such as colored dissolved organic matter, non-algal particulate matter, and phytoplankton) from ocean color remote sensors has been the lack of in-situ bio-optical data in the Bering Sea. To address this issue, the central part of this dissertation was to i) assess phytoplankton absorption of culture and seawater samples using spectrophotometric and pigment reconstruction methods and ii) obtain a suite of in-water measurements for characterization and parameterization of light absorption properties in the southeastern Bering Sea. One of the main objectives was to assess the bio-optical models and parameterizations currently used in satellite algorithms for the southeastern Bering Sea, which were found to be inapplicable in these waters due to the dominant contribution by CDOM absorption. The CDOM absorption accounted for greater than 50% of the diffuse light attenuation coefficient and caused the remote sensing reflectance to be lower, more in the blue than the green region of the visible spectrum, causing the blue to green reflectance ratios to decrease by a factor of ~2. The lower specific absorption relative to lower and middle latitudes indicated significant pigment packaging and/or change in pigment composition which was consistent with variability in phytoplankton community structure. These results suggested the need for developing regional algorithms and parameterizations; regional empirical ... |
format |
Text |
author |
Naik, Puneeta Suresh |
author_facet |
Naik, Puneeta Suresh |
author_sort |
Naik, Puneeta Suresh |
title |
Oceanic Light Absorption Properties: Assessment and Characterization in the Southeastern Bering Sea Using Field and Satellite Observations |
title_short |
Oceanic Light Absorption Properties: Assessment and Characterization in the Southeastern Bering Sea Using Field and Satellite Observations |
title_full |
Oceanic Light Absorption Properties: Assessment and Characterization in the Southeastern Bering Sea Using Field and Satellite Observations |
title_fullStr |
Oceanic Light Absorption Properties: Assessment and Characterization in the Southeastern Bering Sea Using Field and Satellite Observations |
title_full_unstemmed |
Oceanic Light Absorption Properties: Assessment and Characterization in the Southeastern Bering Sea Using Field and Satellite Observations |
title_sort |
oceanic light absorption properties: assessment and characterization in the southeastern bering sea using field and satellite observations |
publisher |
LSU Digital Commons |
publishDate |
2011 |
url |
https://digitalcommons.lsu.edu/gradschool_dissertations/768 https://doi.org/10.31390/gradschool_dissertations.768 https://digitalcommons.lsu.edu/context/gradschool_dissertations/article/1767/viewcontent/uc.pdf |
geographic |
Bering Sea |
geographic_facet |
Bering Sea |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
LSU Doctoral Dissertations |
op_relation |
https://digitalcommons.lsu.edu/gradschool_dissertations/768 doi:10.31390/gradschool_dissertations.768 https://digitalcommons.lsu.edu/context/gradschool_dissertations/article/1767/viewcontent/uc.pdf |
op_doi |
https://doi.org/10.31390/gradschool_dissertations.768 |
_version_ |
1768385177988366336 |