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 data       graph  M    NOAA Coral Reef Watch Operational Daily Near-Real-Time Global 5-km Satellite Coral Bleaching
Monitoring Products
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dhw_5km

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL acknowledgement String NOAA Coral Reef Watch (CRW)
attribute NC_GLOBAL cdm_data_type String Grid
attribute NC_GLOBAL comment String This product is designed to improve on and replace the use of AVHRR Pathfinder SST for use within the Coral Reef Watch Program.
attribute NC_GLOBAL Conventions String CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String coralreefwatch at noaa.gov
attribute NC_GLOBAL creator_institution String NOAA Coral Reef Watch (CRW)
attribute NC_GLOBAL creator_name String NOAA Coral Reef Watch (CRW)
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String https://coralreefwatch.noaa.gov (external link)
attribute NC_GLOBAL date_created String 2017-05-19
attribute NC_GLOBAL date_issued String 2017-05-19
attribute NC_GLOBAL date_metadata_modified String 2021-03-30
attribute NC_GLOBAL date_modified String 2020-06-04
attribute NC_GLOBAL Easternmost_Easting double 179.975
attribute NC_GLOBAL geospatial_bounds String POLYGON ((-90 -180, 90 -180, 90 180, -90 180, -90 -180))
attribute NC_GLOBAL geospatial_bounds_crs String EPSG:4326
attribute NC_GLOBAL geospatial_lat_max double 89.975
attribute NC_GLOBAL geospatial_lat_min double -89.975
attribute NC_GLOBAL geospatial_lat_resolution double 0.049999999999999996
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double 179.975
attribute NC_GLOBAL geospatial_lon_min double -179.975
attribute NC_GLOBAL geospatial_lon_resolution double 0.049999999999999996
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL history String 2017-05-19T00:00:00Z Data obtained from NOAA Coral Reef Watch and re-distributed via THREDDS Data Server (TDS) at PacIOOS to provide temporal aggregation and distribution through NetCDF/OPeNDAP utilities like ncWMS and ERDDAP.
2018-11-26T00:00:00Z Upgraded dataset from v3.0 to v3.1, which also extends start date from 2013-06-03 back to 1985-04-01.
2020-06-04T00:00:00Z Although still v3.1, CRW implemented some changes to metadata and ice masks for transition to NOAA/NESDIS operational products.
attribute NC_GLOBAL id String CoralTemp-v3.1
attribute NC_GLOBAL infoUrl String https://coralreefwatch.noaa.gov/satellite/ (external link)
attribute NC_GLOBAL institution String NOAA Coral Reef Watch (CRW)
attribute NC_GLOBAL instrument String Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Imaging Spectrometers/Radiometers > AHI > Advanced Himawari Imager, Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Imaging Spectrometers/Radiometers > AVHRR > Advanced Very High Resolution Radiometer, Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Imaging Spectrometers/Radiometers > GOES-13 Imager > Geostationary Operational Environmental Satellite 13-Imager, Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Imaging Spectrometers/Radiometers > GOES-15 Imager > Geostationary Operational Environmental Satellite 15-Imager, Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Imaging Spectrometers/Radiometers > SEVIRI > Spinning Enhanced Visible and Infrared Imager, Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Imaging Spectrometers/Radiometers > VIIRS > Visible-Infrared Imager-Radiometer Suite
attribute NC_GLOBAL instrument_vocabulary String GCMD Instrument Keywords
attribute NC_GLOBAL ISO_Topic_Categories String biota, oceans
attribute NC_GLOBAL keywords String Earth Science > Oceans > Coastal Processes > Coral Reefs, Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature
attribute NC_GLOBAL keywords_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL license String OSTIA Usage Statement (1985-2002): IMPORTANT usage statement. Unless otherwise agreed in writing, these data may be used for pure academic research only, with no commercial or other application and all usage must meet the Met Office Standard Terms and Conditions, which may be found here: https://www.metoffice.gov.uk/corporate/legal/tandc.html. The data may be used for a maximum period of 5 years. Reproduction of the data is permitted provided the following copyright statement is included: (C) Crown Copyright 2010, published by the Met Office. You must submit a completed reproduction license application form (here https://www.metoffice.gov.uk/corporate/legal/repro_licence.html) before using the data. This only needs to be completed once for each user. WARNING Some applications are unable to properly handle signed byte values. If values are encountered > 127, please subtract 256 from this reported value. GHRSST statement (2002-present): GHRSST protocol describes data use as free and open. Coral Reef Watch program statement: The data produced by Coral Reef Watch are available for use without restriction, but Coral Reef Watch relies on the ethics and integrity of the user to ensure that the source of the data and products is appropriately cited and credited. When using these data and products, credit and courtesy should be given to NOAA Coral Reef Watch. Please include the appropriate DOI associated with this dataset in the citation. For more information, visit the NOAA Coral Reef Watch website: https://coralreefwatch.noaa.gov. Recommendations for citing and providing credit are provided at https://coralreefwatch.noaa.gov/satellite/docs/recommendations_crw_citation.php. Users are referred to the footer section of Coral Reef Watch's website (https://coralreefwatch.noaa.gov/index.php) for disclaimers, policies, notices pertaining to the use of the data.
attribute NC_GLOBAL locations String Geographic Region > Global Ocean
attribute NC_GLOBAL locations_vocabulary String GCMD Location Keywords
attribute NC_GLOBAL metadata_link String https://www.pacioos.hawaii.edu/metadata/dhw_5km.html (external link)
attribute NC_GLOBAL naming_authority String org.pacioos
attribute NC_GLOBAL Northernmost_Northing double 89.975
attribute NC_GLOBAL platform String Earth Observation Satellites > GOES (Geostationary Operational Environmental Satellite) > GOES-13, Earth Observation Satellites > GOES (Geostationary Operational Environmental Satellite) > GOES-15, Earth Observation Satellites > Himawari > Himawari Meteorological Satellites, Earth Observation Satellites > Joint Polar Satellite System (JPSS) > SUOMI-NPP > Suomi National Polar-orbiting Partnership, Earth Observation Satellites > METEOSAT > METEOSAT-8, Earth Observation Satellites > METEOSAT > METEOSAT-11, Earth Observation Satellites > METOP > METOP-B > Meteorological Operational Satellite - B
attribute NC_GLOBAL platform_vocabulary String GCMD Platform Keywords
attribute NC_GLOBAL processing_level String Level 4
attribute NC_GLOBAL product_version String 3.1
attribute NC_GLOBAL program String NOAA Coral Reef Watch (CRW)
attribute NC_GLOBAL project String NOAA Coral Reef Watch (CRW)
attribute NC_GLOBAL publisher_email String info at pacioos.org
attribute NC_GLOBAL publisher_institution String Pacific Islands Ocean Observing System (PacIOOS)
attribute NC_GLOBAL publisher_name String Pacific Islands Ocean Observing System (PacIOOS)
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL publisher_url String http://www.pacioos.hawaii.edu (external link)
attribute NC_GLOBAL references String https://coralreefwatch.noaa.gov/product/5km/methodology.php (external link)
attribute NC_GLOBAL source String satellite data
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double -89.975
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v39
attribute NC_GLOBAL summary String Contains a suite of NOAA Coral Reef Watch (CRW) version 3.1 operational global satellite coral bleaching heat stress monitoring products at 5-km resolution produced daily in near real-time, including sea surface temperature (SST), SST anomaly, HotSpot, Degree Heating Week (DHW), and Bleaching Alert Area (BAA). These data are based on CoralTemp Version 1.0, a daily global 5-km sea surface temperature dataset combined from: (1.) NOAA/NESDIS operational near-real-time daily global 5-km geostationary-polar-orbiting (geo-polar) blended night-only SST analysis, (2.) NOAA/NESDIS 2002-2016 reprocessed daily global 5-km geo-polar blended night-only SST analysis, and (3.) United Kingdom Met Office 1985-2002 daily global 5-km night-only SST reanalysis of Operational SST and Sea Ice Analysis (OSTIA). The SST anomaly is the difference of SST compared to daily SST climatology. The coral bleaching HotSpot is a special type of sea surface temperature (SST) anomaly and shows the difference of SST compared to a coral bleaching SST threshold climatology. DHW is the accumulation of Coral Bleaching HotSpots over a period of 12 consecutive weeks. The DHW value at any particular location at any particular time is the summation of the product of HotSpot values which are at least 1 deg C above the bleaching threshold SST and their durations in weeks over the most recent 12-week period. One DHW is equivalent to 1 week of SST at 1 deg C above the threshold or 0.5 week of SST at 2 deg C above the threshold, etc. The units for DHW are deg C-weeks, combining the intensity and duration of heat stress into one single number. Based on research at Coral Reef Watch, when the heat stress reaches 4 deg C-weeks, you can expect to see significant coral bleaching, especially in more sensitive species. When heat stress is 8 deg C-weeks or higher, you would likely see widespread bleaching and mortality from the heat stress.
attribute NC_GLOBAL testOutOfDate String now-60hours
attribute NC_GLOBAL time_coverage_duration String P1D
attribute NC_GLOBAL time_coverage_end String 2024-11-03T12:00:00Z
attribute NC_GLOBAL time_coverage_resolution String P1D
attribute NC_GLOBAL time_coverage_start String 1985-04-01T12:00:00Z
attribute NC_GLOBAL title String NOAA Coral Reef Watch Operational Daily Near-Real-Time Global 5-km Satellite Coral Bleaching Monitoring Products
attribute NC_GLOBAL Westernmost_Easting double -179.975
dimension time   double nValues=14457, evenlySpaced=false, averageSpacing=1 day 0h 0m 30s
attribute time _CoordinateAxisType String Time
attribute time actual_range double 4.812048E8, 1.7306352E9
attribute time axis String T
attribute time coverage_content_type String coordinate
attribute time ioos_category String Time
attribute time long_name String reference time
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time units String seconds since 1970-01-01T00:00:00Z
dimension latitude   float nValues=3600, evenlySpaced=true, averageSpacing=-0.049999999999999996
attribute latitude _CoordinateAxisType String Lat
attribute latitude actual_range float -89.975, 89.975
attribute latitude axis String Y
attribute latitude comment String equirectangular projection and grid centers
attribute latitude coverage_content_type String coordinate
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
attribute latitude valid_max float 89.975
attribute latitude valid_min float -89.975
dimension longitude   float nValues=7200, evenlySpaced=true, averageSpacing=0.049999999999999996
attribute longitude _CoordinateAxisType String Lon
attribute longitude actual_range float -179.975, 179.975
attribute longitude axis String X
attribute longitude comment String equirectangular projection and grid centers
attribute longitude coverage_content_type String coordinate
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
attribute longitude valid_max float 179.975
attribute longitude valid_min float -179.975
variable CRW_BAA   ubyte time, latitude, longitude
attribute CRW_BAA _FillValue ubyte 251
attribute CRW_BAA colorBarMaximum double 4.0
attribute CRW_BAA colorBarMinimum double 0.0
attribute CRW_BAA comment String Bleaching Alert Area (BAA) values are coral bleaching heat stress levels: 0 - No Stress; 1 - Bleaching Watch; 2 - Bleaching Warning; 3 - Bleaching Alert Level 1; 4 - Bleaching Alert Level 2. Product description is provided at https://coralreefwatch.noaa.gov/product/5km/index.php.
attribute CRW_BAA coverage_content_type String thematicClassification
attribute CRW_BAA flag_meanings String no_stress watch warning alert_level1 alert_level2
attribute CRW_BAA flag_values ubyte 0, 1, 2, 3, 4
attribute CRW_BAA ioos_category String Temperature
attribute CRW_BAA long_name String bleaching alert area
attribute CRW_BAA units String 1
attribute CRW_BAA valid_max ubyte 4
attribute CRW_BAA valid_min ubyte 0
variable CRW_BAA_mask   ubyte time, latitude, longitude
attribute CRW_BAA_mask _FillValue ubyte 251
attribute CRW_BAA_mask colorBarMaximum double 4.0
attribute CRW_BAA_mask colorBarMinimum double 0.0
attribute CRW_BAA_mask comment String A 2D array, in the same size as the data array in the X and Y directions, classifying land, missing, and ice pixels that are all flagged by the same missing_value (specified by the variable attribute _FillValue) in the data array(s), along with water (data) pixels.
attribute CRW_BAA_mask coverage_content_type String thematicClassification
attribute CRW_BAA_mask flag_meanings String valid-water land missing ice
attribute CRW_BAA_mask flag_values ubyte 0, 1, 2, 4
attribute CRW_BAA_mask ioos_category String Other
attribute CRW_BAA_mask long_name String CRW_BAA pixel characteristics flag array
attribute CRW_BAA_mask units String 1
variable CRW_BAA_7D_MAX   ubyte time, latitude, longitude
attribute CRW_BAA_7D_MAX _FillValue ubyte 251
attribute CRW_BAA_7D_MAX colorBarMaximum double 4.0
attribute CRW_BAA_7D_MAX colorBarMinimum double 0.0
attribute CRW_BAA_7D_MAX comment String Bleaching Alert Area (BAA) values are coral bleaching heat stress levels: 0 - No Stress; 1 - Bleaching Watch; 2 - Bleaching Warning; 3 - Bleaching Alert Level 1; 4 - Bleaching Alert Level 2. Product description is provided at https://coralreefwatch.noaa.gov/product/5km/index.php.
attribute CRW_BAA_7D_MAX coverage_content_type String thematicClassification
attribute CRW_BAA_7D_MAX flag_meanings String no_stress watch warning alert_level1 alert_level2
attribute CRW_BAA_7D_MAX flag_values ubyte 0, 1, 2, 3, 4
attribute CRW_BAA_7D_MAX ioos_category String Temperature
attribute CRW_BAA_7D_MAX long_name String bleaching alert area 7-day maximum composite
attribute CRW_BAA_7D_MAX units String 1
attribute CRW_BAA_7D_MAX valid_max ubyte 4
attribute CRW_BAA_7D_MAX valid_min ubyte 0
variable CRW_BAA_7D_MAX_mask   ubyte time, latitude, longitude
attribute CRW_BAA_7D_MAX_mask _FillValue ubyte 251
attribute CRW_BAA_7D_MAX_mask colorBarMaximum double 4.0
attribute CRW_BAA_7D_MAX_mask colorBarMinimum double 0.0
attribute CRW_BAA_7D_MAX_mask comment String A 2D array, in the same size as the data array in the X and Y directions, classifying land, missing, and ice pixels that are all flagged by the same missing_value (specified by the variable attribute _FillValue) in the data array(s), along with water (data) pixels.
attribute CRW_BAA_7D_MAX_mask coverage_content_type String thematicClassification
attribute CRW_BAA_7D_MAX_mask flag_meanings String valid-water land missing ice
attribute CRW_BAA_7D_MAX_mask flag_values ubyte 0, 1, 2, 4
attribute CRW_BAA_7D_MAX_mask ioos_category String Other
attribute CRW_BAA_7D_MAX_mask long_name String CRW_BAA_7D_MAX pixel characteristics flag array
attribute CRW_BAA_7D_MAX_mask units String 1
variable CRW_DHW   double time, latitude, longitude
attribute CRW_DHW _FillValue double -327.68
attribute CRW_DHW colorBarMaximum double 16.0
attribute CRW_DHW colorBarMinimum double 0.0
attribute CRW_DHW coverage_content_type String physicalMeasurement
attribute CRW_DHW ioos_category String Temperature
attribute CRW_DHW long_name String degree heating week
attribute CRW_DHW units String Celsius weeks
attribute CRW_DHW valid_max double 100.0
attribute CRW_DHW valid_min double 0.0
variable CRW_DHW_mask   ubyte time, latitude, longitude
attribute CRW_DHW_mask _FillValue ubyte 251
attribute CRW_DHW_mask colorBarMaximum double 4.0
attribute CRW_DHW_mask colorBarMinimum double 0.0
attribute CRW_DHW_mask comment String A 2D array, in the same size as the data array in the X and Y directions, classifying land, missing, and ice pixels that are all flagged by the same missing_value (specified by the variable attribute _FillValue) in the data array(s), along with water (data) pixels.
attribute CRW_DHW_mask coverage_content_type String thematicClassification
attribute CRW_DHW_mask flag_meanings String valid-water land missing ice
attribute CRW_DHW_mask flag_values ubyte 0, 1, 2, 4
attribute CRW_DHW_mask ioos_category String Other
attribute CRW_DHW_mask long_name String CRW_DHW pixel characteristics flag array
attribute CRW_DHW_mask units String 1
variable CRW_HOTSPOT   double time, latitude, longitude
attribute CRW_HOTSPOT _FillValue double -327.68
attribute CRW_HOTSPOT colorBarMaximum double 1.0
attribute CRW_HOTSPOT colorBarMinimum double 0.0
attribute CRW_HOTSPOT coverage_content_type String physicalMeasurement
attribute CRW_HOTSPOT ioos_category String Temperature
attribute CRW_HOTSPOT long_name String coral bleaching hotspot
attribute CRW_HOTSPOT units String Celsius
attribute CRW_HOTSPOT valid_max double 15.0
attribute CRW_HOTSPOT valid_min double -15.0
variable CRW_HOTSPOT_mask   ubyte time, latitude, longitude
attribute CRW_HOTSPOT_mask _FillValue ubyte 251
attribute CRW_HOTSPOT_mask colorBarMaximum double 4.0
attribute CRW_HOTSPOT_mask colorBarMinimum double 0.0
attribute CRW_HOTSPOT_mask comment String A 2D array, in the same size as the data array in the X and Y directions, classifying land, missing, and ice pixels that are all flagged by the same missing_value (specified by the variable attribute _FillValue) in the data array(s), along with water (data) pixels.
attribute CRW_HOTSPOT_mask coverage_content_type String thematicClassification
attribute CRW_HOTSPOT_mask flag_meanings String valid-water land missing ice
attribute CRW_HOTSPOT_mask flag_values ubyte 0, 1, 2, 4
attribute CRW_HOTSPOT_mask ioos_category String Other
attribute CRW_HOTSPOT_mask long_name String CRW_HOTSPOT pixel characteristics flag array
attribute CRW_HOTSPOT_mask units String 1
variable CRW_SEAICE   double time, latitude, longitude
attribute CRW_SEAICE _FillValue double 0.0
attribute CRW_SEAICE colorBarMaximum double 1.0
attribute CRW_SEAICE colorBarMinimum double 0.0
attribute CRW_SEAICE comment String 0 is 0% ice, 1 is 100% ice
attribute CRW_SEAICE coverage_content_type String physicalMeasurement
attribute CRW_SEAICE ioos_category String Ice Distribution
attribute CRW_SEAICE long_name String sea ice fraction
attribute CRW_SEAICE standard_name String sea_ice_area_fraction
attribute CRW_SEAICE units String 1
attribute CRW_SEAICE valid_max double 1.0
attribute CRW_SEAICE valid_min double 0.0
variable CRW_SST   double time, latitude, longitude
attribute CRW_SST _FillValue double -327.68
attribute CRW_SST colorBarMaximum double 34.0
attribute CRW_SST colorBarMinimum double -2.0
attribute CRW_SST coverage_content_type String physicalMeasurement
attribute CRW_SST ioos_category String Temperature
attribute CRW_SST long_name String sea surface temperature
attribute CRW_SST standard_name String sea_surface_temperature
attribute CRW_SST units String Celsius
attribute CRW_SST valid_max double 50.0
attribute CRW_SST valid_min double -2.0
variable CRW_SSTANOMALY   double time, latitude, longitude
attribute CRW_SSTANOMALY _FillValue double -327.68
attribute CRW_SSTANOMALY colorBarMaximum double 5.0
attribute CRW_SSTANOMALY colorBarMinimum double -5.0
attribute CRW_SSTANOMALY coverage_content_type String physicalMeasurement
attribute CRW_SSTANOMALY ioos_category String Temperature
attribute CRW_SSTANOMALY long_name String sea surface temperature anomaly
attribute CRW_SSTANOMALY units String Celsius
attribute CRW_SSTANOMALY valid_max double 15.0
attribute CRW_SSTANOMALY valid_min double -15.0
variable CRW_SSTANOMALY_mask   ubyte time, latitude, longitude
attribute CRW_SSTANOMALY_mask _FillValue ubyte 251
attribute CRW_SSTANOMALY_mask colorBarMaximum double 4.0
attribute CRW_SSTANOMALY_mask colorBarMinimum double 0.0
attribute CRW_SSTANOMALY_mask comment String A 2D array, in the same size as the data array in the X and Y directions, classifying land, missing, and ice pixels that are all flagged by the same missing_value (specified by the variable attribute _FillValue) in the data array(s), along with water (data) pixels.
attribute CRW_SSTANOMALY_mask coverage_content_type String thematicClassification
attribute CRW_SSTANOMALY_mask flag_meanings String valid-water land missing ice
attribute CRW_SSTANOMALY_mask flag_values ubyte 0, 1, 2, 4
attribute CRW_SSTANOMALY_mask ioos_category String Other
attribute CRW_SSTANOMALY_mask long_name String CRW_SSTANOMALY pixel characteristics flag array
attribute CRW_SSTANOMALY_mask units String 1

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.


 
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