Photosynthetically Active Radiation (PAR) Average Annual Frequency of Anomalies, 2002-2013 - Hawaii

Description

Solar irradiance is one of the most important factors influencing coral reefs. As the majority of their nutrients are obtained from symbiotic photosynthesizing organisms, reef-building corals need irradiance 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. This layer represents the annual average number of anomalies of irradiance from 2002-2013, with values presented as fraction of a year. Irradiance is here represented by PAR (photosynthetically active radiation), which is the spectrum of light that is important for photosynthesis. Monthly and 8-day 4-km (0.0417-degree) spatial resolution data were obtained from the MODIS (Moderate-resolution Imaging Spectroradiometer) Aqua satellite instrument from the NASA OceanColor website (http://oceancolor.gsfc.nasa.gov). The PAR average annual frequency of anomalies was calculated by taking the average number of weeks that exceeded the maximum monthly climatological PAR value from 2002-2013 for each pixel. A quality control mask was applied to remove spurious data associated with shallow water, following Gove et al., 2013. Monthly climatologies were calculated from monthly time series using only full years over the Ocean Tipping Points (OTP) project time frame of interest (2002-2013). Time series of anomalies were calculated by quantifying the number and magnitude of events from the 8-day time series that exceed the maximum climatological monthly mean. 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.

Resources

Name Format Description Link
52 Open Geospatial Consortium Web Map Service (WMS). Supported WMS versions include 1.1.1 and 1.3.0. Supported map formats include AtomPub, GeoRSS, GeoTIFF, GIF, JPEG, KML/KMZ, PDF, PNG, SVG, and TIFF. Supported info formats include GeoJSON, GeoJSON-P, GML, HTML, and plain text. http://geo.pacioos.hawaii.edu/geoserver/PACIOOS/hi_otp_all_par_anom_freq/ows?service=WMS&version=1.3.0&request=GetCapabilities
0 http://oceantippingpoints.org/about-us/people#Carrie
0 http://oceantippingpoints.org/about-us/people#Kim
27 http://oceantippingpoints.org
0 This URL provides a viewer and/or data access for this dataset. http://pacioos.org/projects/oceantippingpoints/#data
50 Open Geospatial Consortium Web Coverage Service (WCS). Supported WCS versions include 1.0.0, 1.1.0, and 1.1.1. Supported output formats include GeoTIFF, GIF, JPEG, PNG, or TIFF. http://geo.pacioos.hawaii.edu/geoserver/PACIOOS/hi_otp_all_par_anom_freq/ows?service=WCS&version=1.0.0&request=GetCapabilities
0 This URL provides a viewer for this dataset. http://geo.pacioos.hawaii.edu/geoexplorer/
27 http://pacioos.org
0 This URL provides access to this dataset via GeoServer, including multiple output formats and an OpenLayers viewer. http://geo.pacioos.hawaii.edu/geoserver/
27 http://pacioos.org
0 http://oceantippingpoints.org/about-us/people#Carrie
0 http://oceantippingpoints.org/about-us/people#Carrie
0 http://oceantippingpoints.org/about-us/people#Carrie
27 http://pacioos.org
27 http://oceantippingpoints.org
27 http://pacioos.org
52 Open Geospatial Consortium Web Map Service - Cached (WMS-C). Use of WMS-C is similar to traditional WMS but with the addition of the "tiled=true" parameter, which triggers GeoServer to pull map tiles from GeoWebCache if they have been previously generated. This can dramatically improve performance, especially for larger datasets. Supported map formats include JPEG and PNG. Supported info formats include GeoJSON, GML, HTML, and plain text. http://geo.pacioos.hawaii.edu/geoserver/PACIOOS/gwc/service/wms?service=WMS&version=1.1.1&request=GetCapabilities&tiled=true
0 This URL provides access to this dataset via GeoServer, including multiple output formats and an OpenLayers viewer. https://geo.pacioos.hawaii.edu/geoserver/
0 This URL provides a viewer and/or data access for this dataset. http://pacioos.org/projects/oceantippingpoints/#data
0 http://oceantippingpoints.org/about-us/people#Carrie
0 http://oceantippingpoints.org/about-us/people#Kim
27 http://oceantippingpoints.org
27 http://pacioos.org
0 http://oceantippingpoints.org/about-us/people#Carrie
0 http://oceantippingpoints.org/about-us/people#Carrie
27 http://pacioos.org
50 Open Geospatial Consortium Web Coverage Service (WCS). Supported WCS versions include 1.0.0, 1.1.0, and 1.1.1. Supported output formats include GeoTIFF, GIF, JPEG, PNG, or TIFF. https://geo.pacioos.hawaii.edu/geoserver/PACIOOS/hi_otp_all_par_anom_freq/ows?service=WCS&version=1.0.0&request=GetCapabilities
0 http://oceantippingpoints.org/about-us/people#Carrie
27 http://pacioos.org
52 Open Geospatial Consortium Web Map Service (WMS). Supported WMS versions include 1.1.1 and 1.3.0. Supported map formats include AtomPub, GeoRSS, GeoTIFF, GIF, JPEG, KML/KMZ, PDF, PNG, SVG, and TIFF. Supported info formats include GeoJSON, GeoJSON-P, GML, HTML, and plain text. https://geo.pacioos.hawaii.edu/geoserver/PACIOOS/hi_otp_all_par_anom_freq/ows?service=WMS&version=1.3.0&request=GetCapabilities
0 This URL provides access to this dataset via GeoServer, including multiple output formats and an OpenLayers viewer. https://geo.pacioos.hawaii.edu/geoserver/
0 This URL provides a viewer and/or data access for this dataset. http://pacioos.org/projects/oceantippingpoints/#data
50 Open Geospatial Consortium Web Coverage Service (WCS). Supported WCS versions include 1.0.0, 1.1.0, and 1.1.1. Supported output formats include GeoTIFF, GIF, JPEG, PNG, or TIFF. https://geo.pacioos.hawaii.edu/geoserver/PACIOOS/hi_otp_all_par_anom_freq/ows?service=WCS&version=1.0.0&request=GetCapabilities
52 Open Geospatial Consortium Web Map Service (WMS). Supported WMS versions include 1.1.1 and 1.3.0. Supported map formats include AtomPub, GeoRSS, GeoTIFF, GIF, JPEG, KML/KMZ, PDF, PNG, SVG, and TIFF. Supported info formats include GeoJSON, GeoJSON-P, GML, HTML, and plain text. https://geo.pacioos.hawaii.edu/geoserver/PACIOOS/hi_otp_all_par_anom_freq/ows?service=WMS&version=1.3.0&request=GetCapabilities
0 http://oceantippingpoints.org/about-us/people#Carrie
0 http://oceantippingpoints.org/about-us/people#Kim
27 http://oceantippingpoints.org
27 http://pacioos.org
0 http://oceantippingpoints.org/about-us/people#Carrie
0 http://oceantippingpoints.org/about-us/people#Carrie
27 http://pacioos.org
0 http://oceantippingpoints.org/about-us/people#Carrie
27 http://pacioos.org

Tags

  • human dimensions
  • united states of america
  • coral reef
  • ecosystems
  • human settlements
  • biosphere
  • oceans
  • pacioos
  • continent
  • coastal areas
  • hawaii
  • pacific islands ocean observing system
  • marine ecosystems
  • north america
  • earth science
  • aquatic ecosystems
  • ocean optics
  • ocean
  • vegetation
  • hawaiian islands
  • central pacific ocean
  • photosynthetically active radiation
  • reef habitat
  • coastal processes
  • reef
  • coral reefs
  • pacific ocean

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