Photosynthetically Active Radiation (PAR) Long-term Mean, 2003-2018 - American Samoa
Solar irradiance is one of the most important factors influencing coral reefs. As a majority of their nutrients are obtained from symbiotic photosynthesizing organisms, reef-building corals need sunlight as a fundamental source of energy. Seasonally low irradiance at high latitudes may be linked to reduced growth rates in corals and may limit reef calcification to shallower depths than that observed at lower latitudes. However, high levels of irradiance can lead to light-induced damage, production of free radicals, and in combination with increased temperatures, can exacerbate coral bleaching. Irradiance is here represented by PAR (photosynthetically active radiation), which is the spectrum of light that is important for photosynthesis. This layer represents the mean of 8-day time series of PAR (mol/m2/day) from 2003-2018. Data for PAR for the time period 2003-2018 were obtained from the Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua satellite instrument from the NASA OceanColor website as 8-day 4-km composites. The PAR long-term mean was calculated by taking the average of all 8-day data from 2003-2018 for each pixel. A quality control mask was applied to remove spurious data associated with shallow water, following Gove et al., 2013. Nearshore map pixels with no data were filled with values from the nearest neighboring valid offshore pixel by using a grid of points and the Near Analysis tool in ArcGIS then converting points to raster. Data source: https://oceanwatch.pifsc.noaa.gov/erddap/griddap/aqua_par_8d_2018_0.graph
Data and Resources
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OGC-WCS
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Open Geospatial Consortium Web Coverage Service (WCS). Supported WCS versions...
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OGC-WMS
WMS
Open Geospatial Consortium Web Map Service (WMS). Supported WMS versions...
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GeoServer
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GeoExplorer
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PacIOOS: American Samoa Coral Reef Drivers
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OGC-WMS-C
WMS
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ISO-19139 (Local) Metadata
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Online Access |
OGC:WCS (OGC Web Coverage Service) These data are available for access with an OGC WCS compatible client OGC:WMS (OGC Web Map Service) These data are available for access with an OGC WMS compatible client
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Distributor | NOAA Pacific Islands Fisheries Science Center (PIFSC) |
Point of Contact |
NOAA Pacific Islands Fisheries Science Center (PIFSC) pifsc.info@noaa.gov Online Resource |
Originator |
NOAA Pacific Islands Fisheries Science Center (PIFSC) pifsc.info@noaa.gov Online Resource |
Originator |
NOAA Coral Reef Conservation Program (CRCP) coralreef@noaa.gov Online Resource |
Resource Provider |
NASA Ocean Biology Processing Group (OBPG) Online Resource |
Publisher |
Pacific Islands Ocean Observing System (PacIOOS) info@pacioos.org Online Resource |
Dataset Point of Contact |
Pacific Islands Ocean Observing System (PacIOOS) info@pacioos.org |
General Documentation | |
Associated Documentation |
Pacific Islands Ocean Observing System (PacIOOS)
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Resource Provider |
NASA Ocean Biology Processing Group (OBPG) |
Date(s) |
creation:
2021-09-07
issued: 2021-09-07 revision: 2021-09-07 creation: 2021-09-07 issued: 2021-09-07 revision: 2021-09-07 creation: 2021-09-07 issued: 2021-09-07 revision: 2021-09-07 creation: 2021-09-07 issued: 2021-09-07 revision: 2021-09-07 |
Purpose | These layers were developed as part of a geospatial database of key anthropogenic and environmental pressures to coastal waters of American Samoa. |
Use Limitations |
The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, University of Hawaii, PacIOOS, NOAA, State of Hawaii nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.
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Spatial Bounding Box Coordinates | N: -10.776496516692129° S: -14.732041047992729° E: -167.82502007000386° W: -171.33852794285266° |
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GCMD Science Keywords
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GCMD Data Center Keywords
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GCMD Location Keywords
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GCMD Project Keywords
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Use Constraints |
The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, University of Hawaii, PacIOOS, NOAA, State of Hawaii nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.
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Lineage Statement | 2021-09-07T00:00:00Z OGC web services (WMS and WFS) enabled by PacIOOS via GeoServer. Original data from source provider may have been reformatted, reprojected, or adjusted in other ways to optimize these capabilities. |
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CF related |