Chlorophyll-a Standard Deviation of Long-Term Mean, 2002-2013 - Hawaii
type: Dataset
description: 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.
keyword: amerigeo
keyword: amerigeoss
keyword: ckan
keyword: geo
keyword: geoss
keyword: national
keyword: north-america
keyword: united-states
issued: 2025-12-01T10:58:44.546307
modified: 2025-12-01T10:58:44.546311

US Migrating
type: Agent

GeoServer
type: Distribution
description: This URL provides access to this dataset via GeoServer, including multiple output formats and an OpenLayers viewer.
access URL: http://geo.pacioos.hawaii.edu/geoserver/
issued: 2019-02-27T04:46:51.458699
modified: 2025-12-01T10:58:44.533812

GeoExplorer
type: Distribution
description: This URL provides a viewer for this dataset.
access URL: http://geo.pacioos.hawaii.edu/geoexplorer/
issued: 2019-02-27T04:46:51.458714
modified: 2025-12-01T10:58:44.534243

FGDC metadata
type: Distribution
description: This URL provides additional metadata for this dataset from the source provider.
format: XML
access URL: http://geo.pacioos.hawaii.edu/geoserver/www/metadata/hi_otp_all_chlor_std.xml
issued: 2019-02-27T04:46:51.458720
modified: 2025-12-01T10:58:44.534651

PacIOOS: Ocean Tipping Points (OTP) Data Viewer
type: Distribution
description: This URL provides a viewer for this dataset.
access URL: http://pacioos.org/projects/oceantippingpoints/#data
issued: 2019-02-27T04:46:51.458724
modified: 2025-12-01T10:58:44.535047

Web Resource
type: Distribution
access URL: http://oceantippingpoints.org
issued: 2019-02-27T04:46:51.458728
modified: 2025-12-01T10:58:44.535462

Web Resource
type: Distribution
access URL: http://oceantippingpoints.org
issued: 2019-02-27T04:46:51.458733
modified: 2025-12-01T10:58:44.535867

Web Resource
type: Distribution
access URL: http://pacioos.org
issued: 2019-02-27T04:46:51.458737
modified: 2025-12-01T10:58:44.536265

Web Resource
type: Distribution
access URL: http://oceantippingpoints.org
issued: 2019-02-27T04:46:51.458741
modified: 2025-12-01T10:58:44.536654

Web Resource
type: Distribution
access URL: http://oceantippingpoints.org
issued: 2019-02-27T04:46:51.458746
modified: 2025-12-01T10:58:44.537035

Web Resource
type: Distribution
access URL: http://pacioos.org
issued: 2019-02-27T04:46:51.458750
modified: 2025-12-01T10:58:44.537462

OGC-WCS
type: Distribution
description: 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.
format: WCS
access URL: http://geo.pacioos.hawaii.edu/geoserver/PACIOOS/hi_otp_all_chlor_std/ows
issued: 2019-02-27T04:46:51.458754
modified: 2025-12-01T10:58:44.537916

Web Resource
type: Distribution
access URL: http://oceantippingpoints.org
issued: 2019-02-27T04:46:51.458758
modified: 2025-12-01T10:58:44.538312

Web Resource
type: Distribution
access URL: http://pacioos.org
issued: 2019-02-27T04:46:51.458763
modified: 2025-12-01T10:58:44.538693

OGC-WMS
type: Distribution
description: 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.
format: WMS
access URL: http://geo.pacioos.hawaii.edu/geoserver/PACIOOS/hi_otp_all_chlor_std/ows
issued: 2019-02-27T04:46:51.458767
modified: 2025-12-01T10:58:44.539076

Web Resource
type: Distribution
access URL: http://oceantippingpoints.org
issued: 2019-02-27T04:46:51.458771
modified: 2025-12-01T10:58:44.539446

Web Resource
type: Distribution
access URL: http://pacioos.org
issued: 2019-02-27T04:46:51.458776
modified: 2025-12-01T10:58:44.539819

OGC-WMS-C
type: Distribution
description: 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.
format: WMS
access URL: http://geo.pacioos.hawaii.edu/geoserver/PACIOOS/gwc/service/wms
issued: 2019-02-27T04:46:51.458780
modified: 2025-12-01T10:58:44.540190