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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ftwilliammarycol:oai:scholarworks.wm.edu:vimsarticles-1088 2024-06-23T07:46:25+00:00 An evaluation of ocean color model estimates of marine primary productivity in coastal and pelagic regions across the globe Saba, V. S. Friedrichs, Marjorie A.M. Smith, Walker O., Jr. 2011-01-01T08:00:00Z application/pdf https://scholarworks.wm.edu/vimsarticles/89 doi: 10.5194/bg-8-489-2011 https://scholarworks.wm.edu/context/vimsarticles/article/1088/viewcontent/oceanfloor.pdf unknown W&M ScholarWorks https://scholarworks.wm.edu/vimsarticles/89 doi: 10.5194/bg-8-489-2011 https://scholarworks.wm.edu/context/vimsarticles/article/1088/viewcontent/oceanfloor.pdf http://creativecommons.org/licenses/by/4.0/ VIMS Articles SATELLITE CHLOROPHYLL SKILL ASSESSMENT PACIFIC-OCEAN NORTH PACIFIC PHOTOSYNTHESIS TEMPERATURE VARIABILITY SIMULATION RATES SEA Biological Sciences Peer-Reviewed Articles Marine Biology text 2011 ftwilliammarycol https://doi.org/10.5194/bg-8-489-2011 2024-06-05T03:29:28Z 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 C-14 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 ... Text Antarc* Antarctic Antarctic Peninsula North Atlantic Northeast Atlantic Ross Sea W&M ScholarWorks Antarctic Antarctic Peninsula Pacific Ross Sea The Antarctic Biogeosciences 8 2 489 503 |
institution |
Open Polar |
collection |
W&M ScholarWorks |
op_collection_id |
ftwilliammarycol |
language |
unknown |
topic |
SATELLITE CHLOROPHYLL SKILL ASSESSMENT PACIFIC-OCEAN NORTH PACIFIC PHOTOSYNTHESIS TEMPERATURE VARIABILITY SIMULATION RATES SEA Biological Sciences Peer-Reviewed Articles Marine Biology |
spellingShingle |
SATELLITE CHLOROPHYLL SKILL ASSESSMENT PACIFIC-OCEAN NORTH PACIFIC PHOTOSYNTHESIS TEMPERATURE VARIABILITY SIMULATION RATES SEA Biological Sciences Peer-Reviewed Articles Marine Biology Saba, V. S. Friedrichs, Marjorie A.M. Smith, Walker O., Jr. An evaluation of ocean color model estimates of marine primary productivity in coastal and pelagic regions across the globe |
topic_facet |
SATELLITE CHLOROPHYLL SKILL ASSESSMENT PACIFIC-OCEAN NORTH PACIFIC PHOTOSYNTHESIS TEMPERATURE VARIABILITY SIMULATION RATES SEA Biological Sciences Peer-Reviewed Articles Marine Biology |
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 C-14 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 ... |
format |
Text |
author |
Saba, V. S. Friedrichs, Marjorie A.M. Smith, Walker O., Jr. |
author_facet |
Saba, V. S. Friedrichs, Marjorie A.M. Smith, Walker O., Jr. |
author_sort |
Saba, V. S. |
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 |
W&M ScholarWorks |
publishDate |
2011 |
url |
https://scholarworks.wm.edu/vimsarticles/89 https://scholarworks.wm.edu/context/vimsarticles/article/1088/viewcontent/oceanfloor.pdf |
geographic |
Antarctic Antarctic Peninsula Pacific Ross Sea The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Pacific Ross Sea The Antarctic |
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 |
VIMS Articles |
op_relation |
https://scholarworks.wm.edu/vimsarticles/89 doi: 10.5194/bg-8-489-2011 https://scholarworks.wm.edu/context/vimsarticles/article/1088/viewcontent/oceanfloor.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
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 |
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1802645811437240320 |