| dataFormat | NetCDF |
| authority | gov.noaa.pfeg.coastwatch |
| featureType | Grid |
| id | satellite/OSU/blooms/viirsChla |
Dataset: viirs_chlorophyll
Catalog: Oceanwatch THREDDS Data Server
Access:
| Service | Type | Description |
|---|---|---|
| OPENDAP | Data Access | Access dataset through OPeNDAP using the DAP2 protocol. |
| WCS | Data Access | Supports access to geospatial data as 'coverages'. |
| WMS | Data Access | Supports access to georegistered map images from geoscience datasets. |
| NetcdfSubset | Data Access | A web service for subsetting CDM scientific grid datasets. |
| NCML | Metadata | Provide NCML representation of a dataset. |
| UDDC | Metadata | An evaluation of how well the metadata contained in the dataset conforms to the NetCDF Attribute Convention for Data Discovery (NACDD) |
| ISO | Metadata | Provide ISO 19115 metadata representation of a dataset's structure and metadata. |
Viewers:
| Viewer | Type | Description |
|---|---|---|
| Godiva3 | Browser | |
| default_viewer.ipynb | Jupyter Notebook | The TDS default viewer attempts to plot any Variable contained in the Dataset. |
Description:
- Summary: This product was developed for the Oregon coast based on the observed change between running 8-day composite chlorophyll-a (CHL) data obtained by the VIIRS aboard the Suomi-NPP spacecraft. This product was optimized to detect bloom onset via satellite in Oregon's coastal waters, a region typified by high frequency biological variance yet pervasive cloud cover (see McKibben et al. 2012, JGR-Oceans). The product is based on running relative differences between successive 8-day products. A 'current' composite (an average of the previous 8 days) and a 'reference' composite (an average of the 8-day period immediately preceding the current composite). The reference is differenced from the current, then the result is normalized to the reference. Resulting daily imagery highlights the geographic locations of greatest relative change observed between weekly average CHL, providing a way to track onset and advection of active blooms over time. Note the product is optimized to work best in Oregon's coastal waters, although it is operational further offshore and to the north or south as satellite coverage permits (coverage is increasingly better to the south and worst further offshore and to the north of Oregon). The bloom product accessible from this page is based on the VIIRS CHL product and shows the percent relative change in CHL over time. THIS IS AN EXPERIMENTAL PRODUCT: intended strictly for scientific evaluation by professional marine scientists.
- Rights: 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, CoastWatch, NOAA, 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.
Publishers:
-
Pacific Fisheries Environmental Laboratory
- email: roy.mendelssohn@noaa.gov
- http://oceanwatch.pfeg.noaa.gov
Variables:
- Vocabulary [
CF-1.0]:
- altitude (m) = altitude = altitude
- chla (percent) = Percent Relative Change in Chlorophyll-a Concentration, OC3 Algorithm, 1km, EXPERIMENTAL = Percent_ relative_change_concentration_of_chlorophyll_in_sea_water
- lat (degrees_north) = lat = latitude
- lon (degrees_east) = lon = longitude
- time (seconds since 1970-01-01T00:00:00Z) = time = time
- time_bnds (seconds since 1970-01-01T00:00:00Z) = time_bnds = time_bnds
GeospatialCoverage:
- Longitude: -134.0 to -125.0 Resolution=0.01 degrees_east
- Latitude: 34.0 to 52.0 Resolution=0.01 degrees_north
TimeCoverage:
- Start: 2002-08-11T16:00:00Z
- End: present
- Duration: 22.688 years