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ERDDAP > info > NOAA_DHW_5km

Title Sum-
Institution Dataset ID
 data       graph  M    NOAA Global Coral Bleaching Monitoring Products: Daily 5-km    ?   F   I   M   background (external link) RSS Subscribe
NOAA Coral Reef W...  ?

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL acknowledgement String NOAA Coral Reef Watch
attribute NC_GLOBAL cdm_data_type String Grid
attribute NC_GLOBAL comment String This is a product of the NOAA Coral Reef Watch Daily Global 5km Satellite Coral Bleaching Heat Stress Monitoring Product Suite Version 3.1, derived from CoralTemp v1.0.
attribute NC_GLOBAL contributor_name String C. Mark Eakin
attribute NC_GLOBAL contributor_role String Coordinator, NOAA Coral Reef Watch
attribute NC_GLOBAL Conventions String CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String coralreefwatch at
attribute NC_GLOBAL creator_institution String National Oceanic and Atmospheric Administration (NOAA)
attribute NC_GLOBAL creator_name String NOAA Coral Reef Watch
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String (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 2018-11-14
attribute NC_GLOBAL date_modified String 2018-11-14
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_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_units String degrees_east
attribute NC_GLOBAL history String Data obtained from NOAA Coral Reef Watch and re-distributed via THREDDS Data Server (TDS) at the Pacific Islands Ocean Observing System (PacIOOS) to provide temporal aggregation and distribution through NetCDF/OPeNDAP utilities like Godiva2, Live Access Server (LAS), and ERDDAP (05/2017), Upgraded data stream from v3.0 to v3.1, which also extends start date from 2013-06-03 back to 1985-03-25 (11/2018)
attribute NC_GLOBAL id String dhw_5km
attribute NC_GLOBAL infoUrl String (external link)
attribute NC_GLOBAL institution String NOAA Coral Reef Watch
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 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: Recommendations for citing and providing credit are provided at Users are referred to the footer section of the Coral Reef Watch website ( 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 (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
attribute NC_GLOBAL project String NOAA Coral Reef Watch
attribute NC_GLOBAL publisher_email String info at
attribute NC_GLOBAL publisher_institution String University of Hawaii
attribute NC_GLOBAL publisher_name String Pacific Islands Ocean Observing System (PacIOOS)
attribute NC_GLOBAL publisher_type String group
attribute NC_GLOBAL publisher_url String (external link)
attribute NC_GLOBAL references String (external link)
attribute NC_GLOBAL source String satellite data
attribute NC_GLOBAL sourceUrl String http://localhost:8080/thredds/dodsC/hioos/satellite/dhw_5km (external link)
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 thermal 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 a 7-day maximum 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 thermal stress into one single number. Based on research at Coral Reef Watch, when the thermal stress reaches 4 deg C-weeks, you can expect to see significant coral bleaching, especially in more sensitive species. When thermal stress is 8 deg C-weeks or higher, you would likely see widespread bleaching and mortality from the thermal stress.
attribute NC_GLOBAL testOutOfDate String now-60hours
attribute NC_GLOBAL time_coverage_duration String P1D
attribute NC_GLOBAL time_coverage_end String 2019-01-19T12:00:00Z
attribute NC_GLOBAL time_coverage_resolution String P1D
attribute NC_GLOBAL time_coverage_start String 1985-03-25T12:00:00Z
attribute NC_GLOBAL title String NOAA Global Coral Bleaching Monitoring Products: Daily 5-km
attribute NC_GLOBAL Westernmost_Easting double -179.975
dimension time   double nValues=12354, evenlySpaced=true, averageSpacing=1 day
attribute time _ChunkSizes int 1
attribute time _CoordinateAxisType String Time
attribute time actual_range double 4.806E8, 1.5478992E9
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 of the daily bleaching alert area field
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=false, averageSpacing=-0.049999999999999996
attribute latitude _ChunkSizes int 3600
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=false, averageSpacing=0.049999999999999996
attribute longitude _ChunkSizes int 7200
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_DHW   float time, latitude, longitude
attribute CRW_DHW _ChunkSizes int 1, 1557, 3114
attribute CRW_DHW _FillValue float -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 grid_mapping String crs
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 float 100.0
attribute CRW_DHW valid_min float 0.0
variable CRW_HOTSPOT   float time, latitude, longitude
attribute CRW_HOTSPOT _ChunkSizes int 1, 1200, 2400
attribute CRW_HOTSPOT _FillValue float -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 grid_mapping String crs
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 float 15.0
attribute CRW_HOTSPOT valid_min float -15.0
variable CRW_BAA   byte time, latitude, longitude
attribute CRW_BAA _ChunkSizes int 1, 1800, 3600
attribute CRW_BAA _FillValue byte -5
attribute CRW_BAA colorBarMaximum double 4.0
attribute CRW_BAA colorBarMinimum double 0.0
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 String 0, 1, 2, 3, 4
attribute CRW_BAA grid_mapping String crs
attribute CRW_BAA ioos_category String Temperature
attribute CRW_BAA long_name String bleaching alert area (7-day max)
attribute CRW_BAA units String 1
attribute CRW_BAA valid_max byte 4
attribute CRW_BAA valid_min byte 0
variable CRW_SST   double time, latitude, longitude
attribute CRW_SST _ChunkSizes int 1, 1200, 2400
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 grid_mapping String crs
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   float time, latitude, longitude
attribute CRW_SSTANOMALY _ChunkSizes int 1, 1200, 2400
attribute CRW_SSTANOMALY _FillValue float -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 grid_mapping String crs
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 float 15.0
attribute CRW_SSTANOMALY valid_min float -15.0

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

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