Optical proxies for terrestrial dissolved organic matter in estuaries and coastal waters
Dissolved organic matter (DOM) absorbance and fluorescence were used as optical proxies to track terrestrial DOM fluxes through estuaries and coastal waters by comparing models developed for several coastal ecosystems. Key to using these optical properties is validating and calibrating them with che...
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fttexasamucorpus:oai:tamucc-ir.tdl.org:1969.6/90313 2023-10-25T01:40:25+02:00 Optical proxies for terrestrial dissolved organic matter in estuaries and coastal waters Osburn, Christopher L. Boyd, Thomas J. Montgomery, Michael T. Bianchi, Thomas Coffin, Richard B. Paerl, Hans W. 2016-01-20 application/pdf https://hdl.handle.net/1969.6/90313 https://doi.org/10.3389/fmars.2015.00127 en_US eng Frontiers Osburn, C.L., Boyd, T.J., Montgomery, M.T., Bianchi, T.S., Coffin, R.B. and Paerl, H.W., 2016. Optical proxies for terrestrial dissolved organic matter in estuaries and coastal waters. Frontiers in Marine Science, 2, p.127. https://hdl.handle.net/1969.6/90313 https://doi.org/10.3389/fmars.2015.00127 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ cdom absorbance cdom fluorescence dissolved organic matter (dom) lignin carbon stable isotopes Article 2016 fttexasamucorpus https://doi.org/10.3389/fmars.2015.00127 2023-09-25T10:19:03Z Dissolved organic matter (DOM) absorbance and fluorescence were used as optical proxies to track terrestrial DOM fluxes through estuaries and coastal waters by comparing models developed for several coastal ecosystems. Key to using these optical properties is validating and calibrating them with chemical measurements, such as lignin-derived phenols—a proxy to quantify terrestrial DOM. Utilizing parallel factor analysis (PARAFAC), and comparing models statistically using the OpenFluor database (http://www.openfluor.org) we have found common, ubiquitous fluorescing components which correlate most strongly with lignin phenol concentrations in several estuarine and coastal environments. Optical proxies for lignin were computed for the following regions: Mackenzie River Estuary, Atchafalaya River Estuary (ARE), Charleston Harbor, Chesapeake Bay, and Neuse River Estuary (NRE) (all in North America). The slope of linear regression models relating CDOM absorption at 350 nm (a350) to DOC and to lignin, varied 5–10-fold among systems. Where seasonal observations were available from a region, there were distinct seasonal differences in equation parameters for these optical proxies. The variability appeared to be due primarily to river flow into these estuaries and secondarily to biogeochemical cycling of DOM within them. Despite the variability, overall models using single linear regression were developed that related dissolved organic carbon (DOC) concentration to CDOM (DOC = 40 ± 2 × a350 + 138 ± 16; R2 = 0.77; N = 130) and lignin (Σ8) to CDOM (Σ8 = 2.03 ± 0.07 × a350 − 0.47 ± 0.59; R2 = 0.87; N = 130). This wide variability suggested that local or regional optical models should be developed for predicting terrestrial DOM flux into coastal oceans and taken into account when upscaling to remote sensing observations and calibrations. The following agencies are thanked for their financial support: Strategic Environmental Research and Development Program, ER-1431 and ER-2124 (MM, CO); North Carolina Department of ... Article in Journal/Newspaper Mackenzie river Texas A&M University - Corpus Christi: DSpace Repository Mackenzie River Frontiers in Marine Science 2 |
institution |
Open Polar |
collection |
Texas A&M University - Corpus Christi: DSpace Repository |
op_collection_id |
fttexasamucorpus |
language |
English |
topic |
cdom absorbance cdom fluorescence dissolved organic matter (dom) lignin carbon stable isotopes |
spellingShingle |
cdom absorbance cdom fluorescence dissolved organic matter (dom) lignin carbon stable isotopes Osburn, Christopher L. Boyd, Thomas J. Montgomery, Michael T. Bianchi, Thomas Coffin, Richard B. Paerl, Hans W. Optical proxies for terrestrial dissolved organic matter in estuaries and coastal waters |
topic_facet |
cdom absorbance cdom fluorescence dissolved organic matter (dom) lignin carbon stable isotopes |
description |
Dissolved organic matter (DOM) absorbance and fluorescence were used as optical proxies to track terrestrial DOM fluxes through estuaries and coastal waters by comparing models developed for several coastal ecosystems. Key to using these optical properties is validating and calibrating them with chemical measurements, such as lignin-derived phenols—a proxy to quantify terrestrial DOM. Utilizing parallel factor analysis (PARAFAC), and comparing models statistically using the OpenFluor database (http://www.openfluor.org) we have found common, ubiquitous fluorescing components which correlate most strongly with lignin phenol concentrations in several estuarine and coastal environments. Optical proxies for lignin were computed for the following regions: Mackenzie River Estuary, Atchafalaya River Estuary (ARE), Charleston Harbor, Chesapeake Bay, and Neuse River Estuary (NRE) (all in North America). The slope of linear regression models relating CDOM absorption at 350 nm (a350) to DOC and to lignin, varied 5–10-fold among systems. Where seasonal observations were available from a region, there were distinct seasonal differences in equation parameters for these optical proxies. The variability appeared to be due primarily to river flow into these estuaries and secondarily to biogeochemical cycling of DOM within them. Despite the variability, overall models using single linear regression were developed that related dissolved organic carbon (DOC) concentration to CDOM (DOC = 40 ± 2 × a350 + 138 ± 16; R2 = 0.77; N = 130) and lignin (Σ8) to CDOM (Σ8 = 2.03 ± 0.07 × a350 − 0.47 ± 0.59; R2 = 0.87; N = 130). This wide variability suggested that local or regional optical models should be developed for predicting terrestrial DOM flux into coastal oceans and taken into account when upscaling to remote sensing observations and calibrations. The following agencies are thanked for their financial support: Strategic Environmental Research and Development Program, ER-1431 and ER-2124 (MM, CO); North Carolina Department of ... |
format |
Article in Journal/Newspaper |
author |
Osburn, Christopher L. Boyd, Thomas J. Montgomery, Michael T. Bianchi, Thomas Coffin, Richard B. Paerl, Hans W. |
author_facet |
Osburn, Christopher L. Boyd, Thomas J. Montgomery, Michael T. Bianchi, Thomas Coffin, Richard B. Paerl, Hans W. |
author_sort |
Osburn, Christopher L. |
title |
Optical proxies for terrestrial dissolved organic matter in estuaries and coastal waters |
title_short |
Optical proxies for terrestrial dissolved organic matter in estuaries and coastal waters |
title_full |
Optical proxies for terrestrial dissolved organic matter in estuaries and coastal waters |
title_fullStr |
Optical proxies for terrestrial dissolved organic matter in estuaries and coastal waters |
title_full_unstemmed |
Optical proxies for terrestrial dissolved organic matter in estuaries and coastal waters |
title_sort |
optical proxies for terrestrial dissolved organic matter in estuaries and coastal waters |
publisher |
Frontiers |
publishDate |
2016 |
url |
https://hdl.handle.net/1969.6/90313 https://doi.org/10.3389/fmars.2015.00127 |
geographic |
Mackenzie River |
geographic_facet |
Mackenzie River |
genre |
Mackenzie river |
genre_facet |
Mackenzie river |
op_relation |
Osburn, C.L., Boyd, T.J., Montgomery, M.T., Bianchi, T.S., Coffin, R.B. and Paerl, H.W., 2016. Optical proxies for terrestrial dissolved organic matter in estuaries and coastal waters. Frontiers in Marine Science, 2, p.127. https://hdl.handle.net/1969.6/90313 https://doi.org/10.3389/fmars.2015.00127 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fmars.2015.00127 |
container_title |
Frontiers in Marine Science |
container_volume |
2 |
_version_ |
1780736171688591360 |