NOAA Coral Reef Watch Experimental Daily Global 5 km Satellite Coral Bleaching Thermal Stress Monitoring Product Suite

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Frequently anticipated questions:


What does this data set describe?

Title:
NOAA Coral Reef Watch Experimental Daily Global 5 km Satellite Coral Bleaching Thermal Stress Monitoring Product Suite
Abstract:
The NOAA Coral Reef Watch (CRW) experimental daily global 5 km (0.05 degree exactly) satellite coral bleaching thermal stress monitoring product suite described here is a new-generation version of CRW's current operational twice-weekly global 50 km (0.5 degree exactly) satellite coral bleaching thermal stress monitoring product suite. The high-resolution 5 km suite currently includes Sea Surface Temperature (SST), SST Anomaly, Coral Bleaching HotSpots, coral bleaching Degree Heating Weeks (DHW), and Bleaching Alert Area products, matching the core operational 50 km satellite products. The 5 km product suite provides two major improvements over the current operational 50 km product suite. Firstly, a new-generation SST analysis, the NOAA/NESDIS operational 5 km Blended SST analysis, is used for deriving the high-resolution coral bleaching monitoring product suite. This new-generation SST analysis has significantly improved data density and spatial and temporal resolutions derived from multiple polar-orbiting and geostationary satellites, as well as improved satellite SST quality from new-generation SST algorithms. Secondly, an improved climatology derived from a recently reprocessed historical SST data set is applied. This experimental daily global 5 km coral bleaching thermal stress monitoring product suite, originally released in June 2012, significantly advances CRW's capability for near-real-time satellite coral bleaching thermal stress monitoring. The new 5 km products will comprise the core of CRW's new-generation Decision Support System (DSS) for coral reef ecosystem management after it is fully evaluated and improved, if necessary. With higher spatial and temporal resolution products, CRW can now provide service at or close to reef-scales. After further evaluation of the 5 km product suite, CRW's decades-old operational 50 km product suite, which has provided pioneer service to global coral reef research and management communities, will be retired. This 5 km product suite is expected to undergo continuous improvements over the next few years. CRW will continue to produce the current operational 50 km product suite until the 5 km product suite becomes operational. There will be some differences between the two product suites in certain areas, and user discretion is advised. However, the expectation is that the 5 km high-resolution product suite will be more accurate, in general, due to the improved data quality, density, and spatial and temporal resolutions.
Supplemental_Information:
The entire suite of products mentioned herein is accessible at: <http://coralreefwatch.noaa.gov/satellite/>
  1. How should this data set be cited?

    NOAA Coral Reef Watch program, 20120701, NOAA Coral Reef Watch Experimental Daily Global 5 km Satellite Coral Bleaching Thermal Stress Monitoring Product Suite: NOAA Coral Reef Watch program, College Park, Maryland, USA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -180.0
    East_Bounding_Coordinate: 180.0
    North_Bounding_Coordinate: 90.0
    South_Bounding_Coordinate: -90.0

  3. What does it look like?

    <http://coralreefwatch.noaa.gov/satellite/bleaching5km/images_current/cur_b05kmnn_baa_45ns.gif> (GIF)
    This is the most recent global image of daily 5 km satellite Bleaching Alert Area image.
    <http://coralreefwatch.noaa.gov/satellite/bleaching5km/images_current/cur_b05kmnn_hs_45ns.gif> (GIF)
    This is the most recent global image of daily 5 km satellite Coral Bleaching HotSpots image.
    <http://coralreefwatch.noaa.gov/satellite/bleaching5km/images_current/cur_b05kmnn_dhw_45ns.gif> (GIF)
    This is the most recent global image of daily 5 km satellite coral bleaching Degree Heating Weeks image.
    <http://coralreefwatch.noaa.gov/satellite/bleaching5km/images_current/cur_b05kmnn_sst_45ns.gif> (GIF)
    This is the most recent global image of daily 5 km satellite Sea Surface Temperature (SST) image.
    <http://coralreefwatch.noaa.gov/satellite/bleaching5km/images_current/cur_b05kmnn_ssta_45ns.gif> (GIF)
    This is the most recent global image of daily 5 km satellite SST Anomaly image.

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 01-Jul-2012
    Ending_Date: Present
    Currentness_Reference: Ground Condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: image, webpage

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Raster data set. It contains the following raster data types:

      • Dimensions 3600 x 7200, type Grid Cell

    2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.05. Longitudes are given to the nearest 0.05. Latitude and longitude values are specified in Decimal degrees.

  7. How does the data set describe geographic features?

    Grid Intersection
    There are 7200 grid intersections in each row (at a pre-defined latitude) and 3600 grid intersections in each column (at a pre-defined longitude). Each grid is 0.05 degrees latitude by 0.05 degrees longitude in size, centered at latitudes from 89.975S northward to 89.975N and at longitudes from 179.975W eastward to 179.975E. (Source: <http://coralreefwatch.noaa.gov/satellite/bleaching5km/index.php>)

    NOAA Coral Reef Watch Daily 5 km Satellite Coral Bleaching Thermal Stress Monitoring Product images in GIF format
    These are the image display of the 5 km satellite coral bleaching thermal stress monitoring data (Source: <http://coralreefwatch.noaa.gov/satellite/bleaching5km/index.php>)

    Range of values
    Minimum:0
    Maximum:255
    Units:Index color values


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    NOAA Coral Reef Watch program
    Attn: NOAA Coral Reef Watch Coordinator
    NOAA, E/RA3, Room 3222, 5830 University Research Court
    College Park, Maryland 20740
    USA

    301-683-3320 (voice)
    301-683-3301 (FAX)
    coralreefwatch@noaa.gov


Why was the data set created?

The NOAA Coral Reef Watch (CRW) mission is to utilize remote sensing, modeled, and in situ tools for near-real-time and long term monitoring, modeling and reporting of physical environmental conditions of coral reef ecosystems. A suite of monitoring and prediction products, including this product, has been developed by CRW as a decision support system (DSS) to provide critical and timely coral reef environment information to the U.S. and international coral reef communities.


How was the data set created?

  1. From what previous works were the data drawn?

    NOAA CRW Daily Global 5 km Degree Heating Weeks (source 1 of 3)
    NOAA/NESDIS Coral Reef Watch program, 20120701, NOAA CRW Experimental Daily Global 5 km Satellite Coral Bleaching Degree Heating Weeks: NOAA Coral Reef Watch program, College Park, Maryland, USA.

    Type_of_Source_Media: data file
    Source_Contribution:
    The Bleaching Alert Area product was derived from this coral bleaching Degree Heating Weeks product

    NOAA CRW Daily Global 5 km Coral Bleaching HotSpots (source 2 of 3)
    NOAA/NESDIS Coral Reef Watch program, 20120701, NOAA CRW Experimental Daily Global 5 km Satellite Coral Bleaching HotSpots: NOAA Coral Reef Watch program, College Park, Maryland, USA.

    Type_of_Source_Media: data file
    Source_Contribution:
    The Bleaching Alert Area and Degree Heating Weeks products were derived from this Coral Bleaching HotSpots product

    NOAA/NESDIS 5 km Blended SST (source 3 of 3)
    NOAA/NESDIS, 20120401, NOAA/NESDIS 5 km Blended Sea Surface Temperature product: NOAA/NESDIS, College Park, Maryland, USA.

    Type_of_Source_Media: data file
    Source_Contribution:
    The Bleaching Alert Area, Degree Heating Weeks, Coral Bleaching HotSpots, and SST Anomaly products were derived from this Blended SST analysis.

  2. How were the data generated, processed, and modified?

    Date: Not complete (process 1 of 1)
    The level of coral bleaching thermal stress at a data grid presented in the Bleaching Alert Area product is determined by the values of Degree Heating Weeks and Coral Bleaching HotSpots at the data grid. A Degree Heating Week is calculated as the accumulation of Coral Bleaching HotSpots over 12 consecutive weeks. At each pixel, a coral bleaching threshold SST value is subtracted from the near-real-time SST value measured to produce the Coral Bleaching HotSpot. CRW's SST Anomaly is also derived based on this 5 km Blended SST analysis. Additional details are available on CRW's 5 km product suite webpage: <http://coralreefwatch.noaa.gov/satellite/bleaching5km/index.php> and NOAA/NESDIS' Blended SST website at <http://www.star.nesdis.noaa.gov/sod/mecb/blended_validation/sst_monitor.php>.

    Person who carried out this activity:

    NOAA Coral Reef Watch program
    Attn: NOAA Coral Reef Watch Coordinator
    NOAA, E/RA3, Room 3222, 5830 University Research Court
    College Park, Maryland 20740
    USA

    301-683-3320 (voice)
    301-683-3301 (FAX)
    coralreefwatch@noaa.gov

    Data sources used in this process:
    • NOAA CRW Daily Global 5 km Degree Heating Weeks
    • NOAA CRW Daily Global 5 km Coral Bleaching HotSpots
    • NOAA/NESDIS 5 km Blended SST

  3. What similar or related data should the user be aware of?


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    The accuracy of this experimental product suite depends on the accuracy of the NOAA/NESDIS 5 km Blended SST analysis and CRW's SST climatologies for deriving the SST Anomaly, Coral Bleaching HotSpots, and Degree Heating Weeks (DHW) algorithms. More detailed information can be found on the product description webpage for the 5 km suite (<http://coralreefwatch.noaa.gov/satellite/bleaching5km/description5km.php>), NOAA/NESDIS' Blended SST website (<http://www.star.nesdis.noaa.gov/sod/mecb/blended_validation/sst_monitor.php>), and CRW's methodology webpage for the Coral Bleaching HotSpots and DHW algorithms (<http://coralreefwatch.noaa.gov/satellite/methodology/methodology.php>). A full evaluation and validation of this high-resolution coral bleaching thermal stress monitoring product suite is currently underway.

  2. How accurate are the geographic locations?

    Users are referred to the NOAA/NESDIS Blended SST website at <http://www.star.nesdis.noaa.gov/sod/mecb/blended_validation/sst_monitor.php>.

  3. How accurate are the heights or depths?

    none

  4. Where are the gaps in the data? What is missing?

    There is no spatial data gap existing in this data set. No change will be made to the original product data, but occasional revisions to some images may occur if inaccuracies are detected in the data image display. New products will be produced continuously at scheduled daily update times. As an experimental product suite, it will continuously be evaluated. New, improved, and/or reprocessed versions of the 5 km product suite may replace older versions, with corresponding announcements, as they become available.

  5. How consistent are the relationships among the observations, including topology?

    none


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: none
Use_Constraints:
Not intended for legal use. Data contain prediction uncertainty.

  1. Who distributes the data set? (Distributor 1 of 1)

    NOAA Coral Reef Watch program
    Attn: NOAA Coral Reef Watch Coordinator
    NOAA, E/RA3, Room 3222, 5830 University Research Court
    College Park, Maryland 20740
    USA

    301-683-3320 (voice)
    301-683-3301 (FAX)
    coralreefwatch@noaa.gov

  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA cannot assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 16-May-2014
Metadata author:
NOAA Coral Reef Watch program
Attn: NOAA Coral Reef Watch Coordinator
NOAA, E/RA3, Room 3222, 5830 University Research Court
College Park, Maryland 20740
USA

301-683-3320 (voice)
301-683-3301 (FAX)
coralreefwatch@noaa.gov

Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)


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