NOAA Coral Reef Watch 5km Regional Satellite Coral Disease Outbreak Risk Monitoring Products - Great Barrier Reef, Australia

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Frequently anticipated questions:

What does this data set describe?

Title:
NOAA Coral Reef Watch 5km Regional Satellite Coral Disease Outbreak Risk Monitoring Products - Great Barrier Reef, Australia
Abstract:
The NOAA Coral Reef Watch (CRW) 5km-resolution Regional Satellite Coral Disease Outbreak Risk Monitoring Products estimate the potential for infectious disease outbreak in the upcoming summer season for select coral reef regions; i.e., the Great Barrier Reef, Australia and the Hawaiian Archipelago. Initially released in September 2009 at 50km-resolution, the products are now in Version 2.0 (v2, released on June 11, 2019); are derived using NOAA CRW’s v3.1 daily global 5km-resolution CoralTemp Sea Surface Temperature (SST) product; and are available from January 1, 1985 to the present. The Coral Disease Outbreak Risk products are comprised of multiple metrics/variables developed by CRW, including Winter Cold Snap, Winter Conditions, Seasonal Outlook, Summer Hot Snap, and Current Summer Outbreak Risk. The Winter Cold Snap metric accumulates anomalously cold temperatures through time, as compared with the usual range of winter temperatures, providing an indication of unusually cold events. Such events reflect a reduction in disease pathogen loading during extreme cold periods. The Winter Conditions metric accumulates temperature anomalies during the cold season as compared with the average temperature observed in the three coldest months ("winter") at each location. It represents the variation in temperature during the most recent cold season from the climatological average condition. Mild winters (i.e., neither cool nor warm) have been linked to subsequent outbreaks of White Syndrome disease in corals. Research has shown that such outbreaks have not occurred following cool or warm winters, likely related to a reduction in disease pathogen abundance and an increase in host resistance, respectively. The Seasonal Outlook is based solely on the two described cold season metrics; it gives a measure of the pre-disposition to disease outbreak during the following warm season. Only locations that experience mild Winter Conditions are considered to be at-risk, with the likelihood defined by the presence/absence of unusual Cold Snaps. The Seasonal Outlook value is issued at the end of the cold season for each region and provides a 3-6 month forecast of the likelihood of disease outbreak. The Summer Hot Snap metric accumulates anomalously hot temperatures through time, as compared with the usual range of summer temperatures, providing an indication of unusually hot events. This metric represents the level of hot stress that corals experience. The Current Summer Outbreak Risk is assigned only for locations that are deemed at-risk in the Seasonal Outlook and is defined by the level of Hot Snap experienced during the subsequent warm period. Outbreak Risk in the yellow-to-red range indicates that there is a significant likelihood of coral disease, increasing linearly with the color scale. The Current Summer Outbreak Risk is updated in near real-time during the warm season for each region, on Monday and Thursday. For the Great Barrier Reef region, the warm season is from October to the following April each year. The 5km Regional Satellite Coral Disease Outbreak Risk Monitoring Products, their detailed descriptions, and available data formats and delivery mechanisms are accessible at https://coralreefwatch.noaa.gov/product/disease/index.php, and for the Great Barrier Reef region in particular, at https://coralreefwatch.noaa.gov/product/disease/dz_gbr.php.
Supplemental_Information:
The Coral Disease Outbreak Risk products and SST data mentioned in this metadata file are accessible at: https://coralreefwatch.noaa.gov/product/disease/index.php.
  1. How might this data set be cited?
    NOAA Coral Reef Watch program, 20200730, NOAA Coral Reef Watch 5km Regional Satellite Coral Disease Outbreak Risk Monitoring Products - Great Barrier Reef, Australia: NOAA Coral Reef Watch program, College Park, Maryland, USA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: 140.0
    East_Bounding_Coordinate: 155.0
    North_Bounding_Coordinate: -10.0
    South_Bounding_Coordinate: -25.0
  3. What does it look like?
    https://coralreefwatch.noaa.gov/data/disease/v2/image/gbr/dz_gbr_20200430_cdw_wdw.png (PNG)
    This is the most recent image, as of this writing, of the NOAA Coral Reef Watch 5km Regional Satellite Coral Disease Outbreak Risk's Seasonal Outlook metric for the Great Barrier Reef (for the 2019/2020 season).
    https://coralreefwatch.noaa.gov/data/disease/v2/image/gbr/dz_gbr_20200430_hdw_wdw.png (PNG)
    This is the most recent image, as of this writing, of the NOAA Coral Reef Watch 5km Regional Satellite Coral Disease Outbreak Risk's Current Summer Outbreak Risk metric for the Great Barrier Reef (for the 2019/2020 season).
    https://coralreefwatch.noaa.gov/data/disease/v2/image/gbr/dz_gbr_20200430_cdw.png (PNG)
    This is the most recent image, as of this writing, of the NOAA Coral Reef Watch 5km Regional Satellite Coral Disease Outbreak Risk's Winter Cold Snap metric for the Great Barrier Reef (for the 2019/2020 season).
    https://coralreefwatch.noaa.gov/data/disease/v2/image/gbr/dz_gbr_20200430_wdw.png (PNG)
    This is the most recent image, as of this writing, of the NOAA Coral Reef Watch 5km Regional Satellite Coral Disease Outbreak Risk's Winter Conditions metric for the Great Barrier Reef (for the 2019/2020 season).
    https://coralreefwatch.noaa.gov/data/disease/v2/image/gbr/dz_gbr_20200430_hdw.png (PNG)
    This is the most recent image, as of this writing, of the NOAA Coral Reef Watch 5km Regional Satellite Coral Disease Outbreak Risk's Summer Hot Snap metric for the Great Barrier Reef (for the 2019/2020 season).
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 01-Jan-1985
    Ending_Date: Present
    Currentness_Reference: ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: remote sensing image, web page
  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 31 x 31, 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
    For the Great Barrier Reef region, there are 31 grid intersections in each row (at a pre-defined latitude) and 31 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 25.0S northward to 10.0S and at longitudes of from 140.0E eastward to 155.0E. (Source: https://coralreefwatch.noaa.gov/product/disease/index.php)
    Coral Disease Outbreak Risk matrix image files in PNG format
    These are the image displays of the Coral Disease Outbreak Risk metric data. (Source: https://coralreefwatch.noaa.gov/product/disease/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 Center for Weather and Climate Prediction (NCWCP), 5830 University Research Ct., E/RA32
    College Park, Maryland
    USA

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

Why was the data set created?

The NOAA Coral Reef Watch Coral Disease Outbreak Risk Monitoring Products were developed primarily for monitoring and assessing coral disease outbreak, as decision support tools 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 CoralTemp (source 1 of 1)
    NOAA/NESDIS Coral Reef Watch program, 20180801, NOAA CRW Version 3.1 Daily Global 5km CoralTemp SST dataset: NOAA Coral Reef Watch program, College Park, Maryland, USA.

    Type_of_Source_Media: data file
    Source_Contribution:
    The Coral Disease Outbreak Risk product metrics were derived from this SST product.
  2. How were the data generated, processed, and modified?
    Date: Not complete (process 1 of 1)
    At each pixel, the CoralTemp SST value is evaluated to derive the Winter Cold Snap, Winter Conditions, and Summer Hot Snap metrics, which are used for generating the Seasonal Outlook and Current Summer Outbreak Risk metrics. See the CRW website at https://coralreefwatch.noaa.gov/product/disease/index.php and suggested references listed above for more details. Person who carried out this activity:
    NOAA Coral Reef Watch program
    Attn: NOAA Coral Reef Watch Coordinator
    NOAA Center for Weather and Climate Prediction (NCWCP), 5830 University Research Ct., E/RA32
    College Park, Maryland
    USA

    301-683-3320 (voice)
    301-683-3301 (FAX)
    coralreefwatch@noaa.gov
    Data sources used in this process:
    • NOAA CRW CoralTemp
  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 the Coral Disease Outbreak Risk product metrics depends on the accuracy of CRW's Version 3.1 daily global 5km CoralTemp sea surface temperature (SST) product (which was developed from a combination of the NOAA/NESDIS operational daily global 5km Geostationary (Geo)-Polar-orbiting (Polar) Blended Night-only SST Analysis; NOAA/NESDIS 2002-2016 reprocessed daily global 5km Geo-Polar Blended Night-only SST Analysis; and the United Kingdom Met Office’s 1985-2002 daily global 5km night-only SST reanalysis on the OSTIA), CRW's related SST climatologies, and the product algorithms. More detailed information can be found on CRW's 5km products methodology page (https://coralreefwatch.noaa.gov/product/5km/methodology.php). While we continue to evaluate the performance and accuracy of CRW's Version 3.1 daily global 5km CoralTemp SST, preliminary analysis of the 5km Coral Disease Outbreak Risk metrics for the Great Barrier Reef has demonstrated success in denoting disease outbreak events.
  2. How accurate are the geographic locations?
    Users are referred to CRW's 5km products methodology page (https://coralreefwatch.noaa.gov/product/5km/methodology.php), the product description on CRW's Version 3.1 daily global 5km CoralTemp SST product page (https://coralreefwatch.noaa.gov/product/5km/index_5km_sst.php), and to the NOAA/NESDIS Geo-Polar Blended SST website (https://coastwatch.noaa.gov/cw/satellite-data-products/sea-surface-temperature/sea-surface-temperature-near-real-time-geopolar-blended.html) for more information.
  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 dataset. Because this is currently an experimental product undergoing research and development, product revisions are anticipated. When a revision is needed, the whole product time series (both current and archived product) will be reprocessed to replace the existing product time series. The near real-time disease monitoring product metrics will be updated continuously and added into past data collections once a year.
  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 may contain inaccuracies due to cloud cover and/or other reasons.
  1. Who distributes the data set? (Distributor 1 of 1)
    NOAA Coral Reef Watch program
    Attn: NOAA Coral Reef Watch Coordinator
    NOAA Center for Weather and Climate Prediction (NCWCP), 5830 University Research Ct., E/RA32
    College Park, Maryland
    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 and images, 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 images, 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: 30-Jul-2020
Metadata author:
NOAA Coral Reef Watch program
Attn: NOAA Coral Reef Watch Coordinator
NOAA Center for Weather and Climate Prediction (NCWCP), 5830 University Research Ct., E/RA32
College Park, Maryland
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)
Generated by mp version 2.9.48 on Sat May 4 11:02:15 2024