Chlorophyll-a Standard Deviation of Long-Term Mean, 2002-2013 - Hawaii

Chlorophyll-a is a widely used proxy for phytoplankton biomass and an indicator for changes in phytoplankton production. As an essential source of energy in the marine environment, the extent and availability of phytoplankton biomass can be highly influential for fisheries production and dictate trophic structure in marine ecosystems. Changes in phytoplankton biomass are predominantly effected by changes in nutrient availability, through either natural (e.g., turbulent ocean mixing) or anthropogenic (e.g., agricultural runoff) processes. This layer represents the standard deviation of the 8-day time series of chlorophyll-a (mg/m3) from 2002-2013. 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 standard deviation was calculated over all 8-day chlorophyll-a data 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. 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 and Resources

Field Value
access_constraints []
bbox-east-long -154.56326617912035
bbox-north-lat 22.42373568629166
bbox-south-lat 18.755036208219373
bbox-west-long -160.41246354980814
contact-email kappel@nceas.ucsb.edu
coupled-resource [{"href": ["#DataIdentification"], "uuid": [], "title": []}, {"href": ["#DataIdentification"], "uuid": [], "title": []}, {"href": ["#DataIdentification"], "uuid": [], "title": []}]
dataset-reference-date [{"type": "creation", "value": "2017-03-14"}, {"type": "issued", "value": "2017-03-14"}, {"type": "revision", "value": "2017-03-14"}]
graphic-preview-description Sample image.
graphic-preview-file http://pacioos.org/metadata/browse/hi_otp_all_chlor_std.png
guid hi_otp_all_chlor_std
licence []
metadata-date 2021-03-30
metadata-language eng
metadata_type geospatial
old-spatial {"type": "Polygon", "coordinates": [[[-160.41246355, 18.7550362082], [-154.563266179, 18.7550362082], [-154.563266179, 22.4237356863], [-160.41246355, 22.4237356863], [-160.41246355, 18.7550362082]]]}
resource-type dataset
responsible-party [{"name": "National Center for Ecological Analysis and Synthesis (NCEAS)", "roles": ["pointOfContact"]}]
spatial {"type": "Polygon", "coordinates": [[[-160.41246355, 18.7550362082], [-154.563266179, 18.7550362082], [-154.563266179, 22.4237356863], [-160.41246355, 22.4237356863], [-160.41246355, 18.7550362082]]]}
spatial-data-service-type Open Geospatial Consortium Web Coverage Service (WCS)
spatial_harvester true
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • aquatic-ecosystems
  • biosphere
  • central-pacific-ocean
  • chlorophyll
  • ckan
  • coastal-areas
  • coastal-processes
  • continent
  • coral-reef
  • coral-reefs
  • earth-science
  • ecosystems
  • geo
  • geoss
  • hawaii
  • hawaiian-islands
  • human-dimensions
  • human-settlements
  • marine-ecosystems
  • national
  • north-america
  • ocean
  • ocean-chemistry
  • ocean-color
  • ocean-optics
  • oceans
  • pacific-islands-ocean-observing-system
  • pacific-ocean
  • pacioos
  • reef
  • reef-habitat
  • united-states
  • united-states-of-america
isopen False
metadata_created 2025-11-22T20:00:20.635025
metadata_modified 2025-11-22T20:00:20.635030
notes Chlorophyll-a is a widely used proxy for phytoplankton biomass and an indicator for changes in phytoplankton production. As an essential source of energy in the marine environment, the extent and availability of phytoplankton biomass can be highly influential for fisheries production and dictate trophic structure in marine ecosystems. Changes in phytoplankton biomass are predominantly effected by changes in nutrient availability, through either natural (e.g., turbulent ocean mixing) or anthropogenic (e.g., agricultural runoff) processes. This layer represents the standard deviation of the 8-day time series of chlorophyll-a (mg/m3) from 2002-2013. 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 standard deviation was calculated over all 8-day chlorophyll-a data 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. 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.
num_resources 17
num_tags 35
title Chlorophyll-a Standard Deviation of Long-Term Mean, 2002-2013 - Hawaii