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...
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COPERNICUS GESELLSCHAFT MBH
2011
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Online Access: | https://publications.jrc.ec.europa.eu/repository/handle/JRC63872 http://www.biogeosciences.net/8/489/2011/bg-8-489-2011.html https://doi.org/10.5194/bg-8-489-2011 |
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ftjrc:oai:publications.jrc.ec.europa.eu:JRC63872 2023-05-15T13:44:28+02:00 An evaluation of ocean color model estimates of marine primary productivity in coastal and pelagic regions across the globe. SABA Vincent FRIEDRICHS Marjorie ANTOINE David ARMSTRONG Robert ASANUMA Ichio BEHRENFELD Michael CIOTTI Aurea DOWELL Mark HOEPFFNER Nicolas HYDE Kimberly ISHIZAKA Joji KAMEDA Takahiko MARRA John MELIN Frederic MOREL Andre O'REILLY John SCARDI Michele SMITH W. SMYTH Tim TANG S. UITZ Julia WATERS Kirk WESTBERRY Toby 2011 Printed https://publications.jrc.ec.europa.eu/repository/handle/JRC63872 http://www.biogeosciences.net/8/489/2011/bg-8-489-2011.html https://doi.org/10.5194/bg-8-489-2011 ENG eng COPERNICUS GESELLSCHAFT MBH JRC63872 2011 ftjrc https://doi.org/10.5194/bg-8-489-2011 2022-05-01T08:17:06Z 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 14C 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 further reduce the skill of ocean color models. JRC.H.3 - Global environment monitoring Other/Unknown Material Antarc* Antarctic Antarctic Peninsula North Atlantic Northeast Atlantic Ross Sea Joint Research Centre, European Commission: JRC Publications Repository Antarctic The Antarctic Antarctic Peninsula Ross Sea Pacific Biogeosciences 8 2 489 503 |
institution |
Open Polar |
collection |
Joint Research Centre, European Commission: JRC Publications Repository |
op_collection_id |
ftjrc |
language |
English |
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 14C 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 further reduce the skill of ocean color models. JRC.H.3 - Global environment monitoring |
author |
SABA Vincent FRIEDRICHS Marjorie ANTOINE David ARMSTRONG Robert ASANUMA Ichio BEHRENFELD Michael CIOTTI Aurea DOWELL Mark HOEPFFNER Nicolas HYDE Kimberly ISHIZAKA Joji KAMEDA Takahiko MARRA John MELIN Frederic MOREL Andre O'REILLY John SCARDI Michele SMITH W. SMYTH Tim TANG S. UITZ Julia WATERS Kirk WESTBERRY Toby |
spellingShingle |
SABA Vincent FRIEDRICHS Marjorie ANTOINE David ARMSTRONG Robert ASANUMA Ichio BEHRENFELD Michael CIOTTI Aurea DOWELL Mark HOEPFFNER Nicolas HYDE Kimberly ISHIZAKA Joji KAMEDA Takahiko MARRA John MELIN Frederic MOREL Andre O'REILLY John SCARDI Michele SMITH W. SMYTH Tim TANG S. UITZ Julia WATERS Kirk WESTBERRY Toby An evaluation of ocean color model estimates of marine primary productivity in coastal and pelagic regions across the globe. |
author_facet |
SABA Vincent FRIEDRICHS Marjorie ANTOINE David ARMSTRONG Robert ASANUMA Ichio BEHRENFELD Michael CIOTTI Aurea DOWELL Mark HOEPFFNER Nicolas HYDE Kimberly ISHIZAKA Joji KAMEDA Takahiko MARRA John MELIN Frederic MOREL Andre O'REILLY John SCARDI Michele SMITH W. SMYTH Tim TANG S. UITZ Julia WATERS Kirk WESTBERRY Toby |
author_sort |
SABA Vincent |
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 GESELLSCHAFT MBH |
publishDate |
2011 |
url |
https://publications.jrc.ec.europa.eu/repository/handle/JRC63872 http://www.biogeosciences.net/8/489/2011/bg-8-489-2011.html https://doi.org/10.5194/bg-8-489-2011 |
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_relation |
JRC63872 |
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_ |
1766202104562581504 |