An evaluation of ocean color model estimates of marine primary productivity in coastal and pelagic regions across the globe
Nearly half of the earth's photosynthetically fixed carbon derives from the oceans. To determine global and region specific rates, we rely on models that estimate marine net primary productivity (NPP) thus it is essential that these models are evaluated to determine their accuracy. Here we asse...
Published in: | Biogeosciences |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2011
|
Subjects: | |
Online Access: | https://doi.org/10.5194/bg-8-489-2011 https://doaj.org/article/ebbe47ed681e4e9da7fd9695e1d41185 |
id |
ftdoajarticles:oai:doaj.org/article:ebbe47ed681e4e9da7fd9695e1d41185 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:ebbe47ed681e4e9da7fd9695e1d41185 2023-05-15T13:52:18+02:00 An evaluation of ocean color model estimates of marine primary productivity in coastal and pelagic regions across the globe V. S. Saba M. A. M. Friedrichs D. Antoine R. A. Armstrong I. Asanuma M. J. Behrenfeld A. M. Ciotti M. Dowell N. Hoepffner K. J. W. Hyde J. Ishizaka T. Kameda J. Marra F. Mélin A. Morel J. O'Reilly M. Scardi W. O. Smith Jr. T. J. Smyth S. Tang J. Uitz K. Waters T. K. Westberry 2011-02-01T00:00:00Z https://doi.org/10.5194/bg-8-489-2011 https://doaj.org/article/ebbe47ed681e4e9da7fd9695e1d41185 EN eng Copernicus Publications http://www.biogeosciences.net/8/489/2011/bg-8-489-2011.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-8-489-2011 1726-4170 1726-4189 https://doaj.org/article/ebbe47ed681e4e9da7fd9695e1d41185 Biogeosciences, Vol 8, Iss 2, Pp 489-503 (2011) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2011 ftdoajarticles https://doi.org/10.5194/bg-8-489-2011 2022-12-30T22:50:24Z Nearly half of the earth's photosynthetically fixed carbon derives from the oceans. To determine global and region specific rates, we rely on models that estimate marine net primary productivity (NPP) thus it is essential that these models are evaluated to determine their accuracy. Here we assessed the skill of 21 ocean color models by comparing their estimates of depth-integrated NPP to 1156 in situ 14 C measurements encompassing ten marine regions including the Sargasso Sea, pelagic North Atlantic, coastal Northeast Atlantic, Black Sea, Mediterranean Sea, Arabian Sea, subtropical North Pacific, Ross Sea, West Antarctic Peninsula, and the Antarctic Polar Frontal Zone. Average model skill, as determined by root-mean square difference calculations, was lowest in the Black and Mediterranean Seas, highest in the pelagic North Atlantic and the Antarctic Polar Frontal Zone, and intermediate in the other six regions. The maximum fraction of model skill that may be attributable to uncertainties in both the input variables and in situ NPP measurements was nearly 72%. On average, the simplest depth/wavelength integrated models performed no worse than the more complex depth/wavelength resolved models. Ocean color models were not highly challenged in extreme conditions of surface chlorophyll- a and sea surface temperature, nor in high-nitrate low-chlorophyll waters. Water column depth was the primary influence on ocean color model performance such that average skill was significantly higher at depths greater than 250 m, suggesting that ocean color models are more challenged in Case-2 waters (coastal) than in Case-1 (pelagic) waters. Given that in situ chlorophyll- a data was used as input data, algorithm improvement is required to eliminate the poor performance of ocean color NPP models in Case-2 waters that are close to coastlines. Finally, ocean color chlorophyll- a algorithms are challenged by optically complex Case-2 waters, thus using satellite-derived chlorophyll- a to estimate NPP in coastal areas would likely ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula North Atlantic Northeast Atlantic Ross Sea Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Antarctic Peninsula Ross Sea Pacific Biogeosciences 8 2 489 503 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 V. S. Saba M. A. M. Friedrichs D. Antoine R. A. Armstrong I. Asanuma M. J. Behrenfeld A. M. Ciotti M. Dowell N. Hoepffner K. J. W. Hyde J. Ishizaka T. Kameda J. Marra F. Mélin A. Morel J. O'Reilly M. Scardi W. O. Smith Jr. T. J. Smyth S. Tang J. Uitz K. Waters T. K. Westberry An evaluation of ocean color model estimates of marine primary productivity in coastal and pelagic regions across the globe |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Nearly half of the earth's photosynthetically fixed carbon derives from the oceans. To determine global and region specific rates, we rely on models that estimate marine net primary productivity (NPP) thus it is essential that these models are evaluated to determine their accuracy. Here we assessed the skill of 21 ocean color models by comparing their estimates of depth-integrated NPP to 1156 in situ 14 C measurements encompassing ten marine regions including the Sargasso Sea, pelagic North Atlantic, coastal Northeast Atlantic, Black Sea, Mediterranean Sea, Arabian Sea, subtropical North Pacific, Ross Sea, West Antarctic Peninsula, and the Antarctic Polar Frontal Zone. Average model skill, as determined by root-mean square difference calculations, was lowest in the Black and Mediterranean Seas, highest in the pelagic North Atlantic and the Antarctic Polar Frontal Zone, and intermediate in the other six regions. The maximum fraction of model skill that may be attributable to uncertainties in both the input variables and in situ NPP measurements was nearly 72%. On average, the simplest depth/wavelength integrated models performed no worse than the more complex depth/wavelength resolved models. Ocean color models were not highly challenged in extreme conditions of surface chlorophyll- a and sea surface temperature, nor in high-nitrate low-chlorophyll waters. Water column depth was the primary influence on ocean color model performance such that average skill was significantly higher at depths greater than 250 m, suggesting that ocean color models are more challenged in Case-2 waters (coastal) than in Case-1 (pelagic) waters. Given that in situ chlorophyll- a data was used as input data, algorithm improvement is required to eliminate the poor performance of ocean color NPP models in Case-2 waters that are close to coastlines. Finally, ocean color chlorophyll- a algorithms are challenged by optically complex Case-2 waters, thus using satellite-derived chlorophyll- a to estimate NPP in coastal areas would likely ... |
format |
Article in Journal/Newspaper |
author |
V. S. Saba M. A. M. Friedrichs D. Antoine R. A. Armstrong I. Asanuma M. J. Behrenfeld A. M. Ciotti M. Dowell N. Hoepffner K. J. W. Hyde J. Ishizaka T. Kameda J. Marra F. Mélin A. Morel J. O'Reilly M. Scardi W. O. Smith Jr. T. J. Smyth S. Tang J. Uitz K. Waters T. K. Westberry |
author_facet |
V. S. Saba M. A. M. Friedrichs D. Antoine R. A. Armstrong I. Asanuma M. J. Behrenfeld A. M. Ciotti M. Dowell N. Hoepffner K. J. W. Hyde J. Ishizaka T. Kameda J. Marra F. Mélin A. Morel J. O'Reilly M. Scardi W. O. Smith Jr. T. J. Smyth S. Tang J. Uitz K. Waters T. K. Westberry |
author_sort |
V. S. Saba |
title |
An evaluation of ocean color model estimates of marine primary productivity in coastal and pelagic regions across the globe |
title_short |
An evaluation of ocean color model estimates of marine primary productivity in coastal and pelagic regions across the globe |
title_full |
An evaluation of ocean color model estimates of marine primary productivity in coastal and pelagic regions across the globe |
title_fullStr |
An evaluation of ocean color model estimates of marine primary productivity in coastal and pelagic regions across the globe |
title_full_unstemmed |
An evaluation of ocean color model estimates of marine primary productivity in coastal and pelagic regions across the globe |
title_sort |
evaluation of ocean color model estimates of marine primary productivity in coastal and pelagic regions across the globe |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/bg-8-489-2011 https://doaj.org/article/ebbe47ed681e4e9da7fd9695e1d41185 |
geographic |
Antarctic The Antarctic Antarctic Peninsula Ross Sea Pacific |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Ross Sea Pacific |
genre |
Antarc* Antarctic Antarctic Peninsula North Atlantic Northeast Atlantic Ross Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula North Atlantic Northeast Atlantic Ross Sea |
op_source |
Biogeosciences, Vol 8, Iss 2, Pp 489-503 (2011) |
op_relation |
http://www.biogeosciences.net/8/489/2011/bg-8-489-2011.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-8-489-2011 1726-4170 1726-4189 https://doaj.org/article/ebbe47ed681e4e9da7fd9695e1d41185 |
op_doi |
https://doi.org/10.5194/bg-8-489-2011 |
container_title |
Biogeosciences |
container_volume |
8 |
container_issue |
2 |
container_start_page |
489 |
op_container_end_page |
503 |
_version_ |
1766256580638015488 |