Bronze level automatically awarded US beta

This data has achieved Bronze level on 25 October 2015 which means this data makes a great start at the basics of publishing open data.

U.S. West Coast MODIS Aqua High Resolution CHLA Climatology Fields (July 2002 - March 2014)

Summary

Type of release
a one-off release of a set of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Release Date
27 September 2015
Modified Date
11 October 2015
Publishers
National Oceanic and Atmospheric Administration, Department of Commerce
Identifier
u-s-west-coast-modis-aqua-high-resolution-chla-climatology-fields-july-2002-march-2014
Landing Page
http://catalog.data.gov/dataset/u-s-west-coast-modis-aqua-high-resolution-chla-climatology-fields-july-2002-march-2014
Temporal Coverage
1 July 2002 — 1 June 2003
Language
eng

Community verification

Other people can verify whether the answers on this certificate are correct.

This certificate is automatically awarded.

Sign in to verify or report this certificate


Description

This suite of CHLA and SST climatology and anomaly data products are derived from daily, 0.0125 degree x 0.0125 degree, MODIS Aqua CHLA and SST fields that cover the California Current System (22N - 51N, 155W - 105W) for the 11-year period July 2002 through June 2013. These daily fields, obtained from the NOAA CoastWatch West Coast Regional Node website, were processed using a successive 3x3, 5x5 and 7x7 grid cell hybrid median filtering technique. This technique was found to effectively reduce noise in the daily fields while maintaining features and detail in important regions such as capes and headlands. The resulting median filtered daily fields were then linearly interpolated to a 0.025 degree x 0.025 degree grid and averaged to create 132 monthly mean fields. The seasonal cycles at each 0.025 degree x 0.025 degree grid cell were obtained by fitting each multiyear time series of monthly means to a nine-parameter regression model consisting of a constant plus four harmonics (frequencies of N/(1-year), N-1,4; Risien and Chelton 2008, JPO). Even with the median filtering and the temporal averaging of the daily fields, the highly inhomogeneous nature of the MODIS fields still resulted in regression coefficients that were excessively noisy. We therefore applied the same successive 3x3, 5x5 and 7x7 hybrid median filtering technique, described above, to the regression coefficients before finally spatially smoothing the coefficients using a loess smoother (Schlax et al. 2001, JTECH) with filter cutoff wavelengths of 0.25 degree latitude by 0.25 degree longitude. The seasonal cycles were then calculated from the filtered regression coefficients for each 0.025 degree x 0.025 degree grid cell using the mean and all four harmonics. It is important to note that THIS SUITE OF DATA PRODUCTS IS HIGHLY EXPERIMENTAL and is strictly intended for scientific evaluation by experienced marine scientists.


General Information


Legal Information

This dataset has been created by US Government which means it is required to be in the public domain. However US copyright law only allows open access by US citizens, we have assumed the data is equivalently licensed as CC0 for the rest of the world as this is in the spirit of the US Government’s Open Data policy.
  • The rights statement is at

    http://catalog.data.gov/dataset/u-s-west-coast-modis-aqua-high-resolution-chla-climatology-fields-july-2002-march-2014 Do you think this data is incorrect? Let us know

  • Outside the US, this data is available under

    Creative Commons CCZero Do you think this data is incorrect? Let us know

  • There are

    yes, and the rights are all held by the same person or organisation Do you think this data is incorrect? Let us know

  • The content is available under

    Creative Commons CCZero Do you think this data is incorrect? Let us know

  • This data contains

    no data about individuals Do you think this data is incorrect? Let us know


Practical Information

  • The data appears in this collection

    http://catalog.data.gov/organization/noaa-gov Do you think this data is incorrect? Let us know

  • The accuracy or relevance of this data will

    go out of date but it is timestamped Do you think this data is incorrect? Let us know

  • The data is

    backed up offsite Do you think this data is incorrect? Let us know


Technical Information

  • This data is

    machine-readable Do you think this data is incorrect? Let us know

  • The format of this data is

    a standard open format Do you think this data is incorrect? Let us know


Social Information

  • The documentation includes machine-readable data for

    title Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    description Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    identifier Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    landing page Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    publisher Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    distribution(s) Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    release date Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    modification date Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    temporal coverage Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    spatial/geographical coverage Do you think this data is incorrect? Let us know

  • The documentation includes machine-readable data for

    language Do you think this data is incorrect? Let us know

  • The documentation about each distribution includes machine-readable data for

    title Do you think this data is incorrect? Let us know

  • The documentation about each distribution includes machine-readable data for

    description Do you think this data is incorrect? Let us know

  • The documentation about each distribution includes machine-readable data for

    release date Do you think this data is incorrect? Let us know

  • The documentation about each distribution includes machine-readable data for

    a URL to access the data Do you think this data is incorrect? Let us know

  • The documentation about each distribution includes machine-readable data for

    a URL to download the dataset Do you think this data is incorrect? Let us know

  • Find out how to contact someone about this data at

    http://catalog.data.gov/dataset/u-s-west-coast-modis-aqua-high-resolution-chla-climatology-fields-july-2002-march-2014 Do you think this data is incorrect? Let us know

  • Find out how to suggest improvements to publication at

    http://www.data.gov/issue/?media_url=http://catalog.data.gov/dataset/u-s-west-coast-modis-aqua-high-resolution-chla-climatology-fields-july-2002-march-2014 Do you think this data is incorrect? Let us know