dhw_5km eng UTF8 dataset service NOAA Coral Reef Watch (CRW) coralreefwatch@noaa.gov https://coralreefwatch.noaa.gov http web browser information pointOfContact 2026-03-14 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) 3 column 7200 0.050000001695656514 row 3600 0.049999999152053956 temporal 1091 86796.0 area NOAA Coral Reef Watch Operational Daily Near-Real-Time Global 5-km Satellite Coral Bleaching Monitoring Products 2017-05-19 creation 2017-05-19 issued 2020-06-04 revision 3.1 org.pacioos dhw_5km NOAA Coral Reef Watch (CRW) coralreefwatch@noaa.gov https://coralreefwatch.noaa.gov http web browser information originator Pacific Islands Ocean Observing System (PacIOOS) info@pacioos.org http://pacioos.org http web browser information publisher 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. Provides the most recent 3 years of data only; for the full time series, see PacIOOS ERDDAP instead. PacIOOS provides timely, reliable, and accurate ocean information to support a safe, clean, productive ocean and resilient coastal zone in the U.S. Pacific Islands region. NOAA Coral Reef Watch (CRW) NOAA Coral Reef Watch (CRW) coralreefwatch@noaa.gov https://coralreefwatch.noaa.gov http web browser information pointOfContact http://pacioos.org/metadata/browse/dhw_5km.png Sample image. Earth Science > Oceans > Coastal Processes > Coral Reefs Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature theme GCMD Science Keywords 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 theme GCMD Platform Keywords 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 theme GCMD Instrument Keywords Geographic Region > Global Ocean place GCMD Location Keywords NOAA Coral Reef Watch (CRW) project GCMD Project Keywords PacIOOS > Pacific Islands Ocean Observing System dataCenter GCMD Data Center Keywords sea_ice_area_fraction sea_surface_temperature latitude longitude time theme CF Standard Name Table v39 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: http://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 http://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. NOAA Coral Reef Watch (CRW) largerWorkCitation project Unidata Common Data Model Grid largerWorkCitation project eng biota oceans 1 -179.97501 179.97501 -89.975 89.975 seconds 2023-03-13T12:00:00Z 2026-03-12T12:00:00Z 0.0 0.0 NOAA Coral Reef Watch Operational Daily Near-Real-Time Global 5-km Satellite Coral Bleaching Monitoring Products 2017-05-19 creation 2017-05-19 issued 2020-06-04 revision NOAA Coral Reef Watch (CRW) coralreefwatch@noaa.gov https://coralreefwatch.noaa.gov http web browser information originator 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. Provides the most recent 3 years of data only; for the full time series, see PacIOOS ERDDAP instead. THREDDS OPeNDAP 1 -179.97501 179.97501 -89.975 89.975 2023-03-13T12:00:00Z 2026-03-12T12:00:00Z 0.0 0.0 tight OPeNDAP Client Access https://pae-paha.pacioos.hawaii.edu/thredds/dodsC/dhw_5km OPeNDAP:OPeNDAP OPeNDAP THREDDS OPeNDAP download NOAA Coral Reef Watch Operational Daily Near-Real-Time Global 5-km Satellite Coral Bleaching Monitoring Products 2017-05-19 creation 2017-05-19 issued 2020-06-04 revision NOAA Coral Reef Watch (CRW) coralreefwatch@noaa.gov https://coralreefwatch.noaa.gov http web browser information originator 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. Provides the most recent 3 years of data only; for the full time series, see PacIOOS ERDDAP instead. Open Geospatial Consortium Web Coverage Service (WCS) 1 -179.97501 179.97501 -89.975 89.975 2023-03-13T12:00:00Z 2026-03-12T12:00:00Z 0.0 0.0 tight GetCapabilities https://pae-paha.pacioos.hawaii.edu/thredds/wcs/dhw_5km?service=WCS&version=1.0.0&request=GetCapabilities OGC:WCS OGC-WCS Open Geospatial Consortium Web Coverage Service (WCS) download NOAA Coral Reef Watch Operational Daily Near-Real-Time Global 5-km Satellite Coral Bleaching Monitoring Products 2017-05-19 creation 2017-05-19 issued 2020-06-04 revision NOAA Coral Reef Watch (CRW) coralreefwatch@noaa.gov https://coralreefwatch.noaa.gov http web browser information originator 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. Provides the most recent 3 years of data only; for the full time series, see PacIOOS ERDDAP instead. Open Geospatial Consortium Web Map Service (WMS) 1 -179.97501 179.97501 -89.975 89.975 2023-03-13T12:00:00Z 2026-03-12T12:00:00Z 0.0 0.0 tight GetCapabilities https://pae-paha.pacioos.hawaii.edu/thredds/wms/dhw_5km?service=WMS&version=1.3.0&request=GetCapabilities OGC:WMS OGC-WMS Open Geospatial Consortium Web Map Service (WMS) download NOAA Coral Reef Watch Operational Daily Near-Real-Time Global 5-km Satellite Coral Bleaching Monitoring Products 2017-05-19 creation 2017-05-19 issued 2020-06-04 revision NOAA Coral Reef Watch (CRW) coralreefwatch@noaa.gov https://coralreefwatch.noaa.gov http web browser information originator 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. Provides the most recent 3 years of data only; for the full time series, see PacIOOS ERDDAP instead. THREDDS NetCDF Subset Service 1 -179.97501 179.97501 -89.975 89.975 2023-03-13T12:00:00Z 2026-03-12T12:00:00Z 0.0 0.0 tight NetCDFSubsetService https://pae-paha.pacioos.hawaii.edu/thredds/ncss/dhw_5km/dataset.html UNIDATA:NCSS THREDDS_NetCDF_Subset THREDDS NetCDF Subset Service download crs short . This is a container variable that describes the grid_mapping used by the data in this file. This variable does not contain any data; only information about the geographic coordinate system. CRW_DHW double degree heating week CRW_DHW_mask byte CRW_DHW pixel characteristics flag array. 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. CRW_HOTSPOT double coral bleaching hotspot CRW_HOTSPOT_mask byte CRW_HOTSPOT pixel characteristics flag array. 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. CRW_SSTANOMALY double sea surface temperature anomaly CRW_SSTANOMALY_mask byte CRW_SSTANOMALY pixel characteristics flag array. 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. CRW_BAA float bleaching alert area. 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. CRW_BAA_mask byte CRW_BAA pixel characteristics flag array. 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. CRW_BAA_7D_MAX float bleaching alert area 7-day maximum composite. 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. CRW_BAA_7D_MAX_mask byte CRW_BAA_7D_MAX pixel characteristics flag array. 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. CRW_SEAICE double sea ice fraction (sea_ice_area_fraction). 0 is 0% ice, 1 is 100% ice CRW_SST double sea surface temperature (sea_surface_temperature) latitude float latitude (latitude). equirectangular projection and grid centers longitude float longitude (longitude). equirectangular projection and grid centers time int reference time (time) Pacific Islands Ocean Observing System (PacIOOS) info@pacioos.org http://pacioos.org http web browser information publisher OPeNDAP DAP/2.0 https://pae-paha.pacioos.hawaii.edu/thredds/satellite.html?dataset=dhw_5km UNIDATA:THREDDS THREDDS Catalog This URL provides a catalog page for this dataset within THREDDS Data Server (TDS). download https://pae-paha.pacioos.hawaii.edu/thredds/dodsC/dhw_5km.html http File Information This URL provides a standard OPeNDAP html interface for selecting data from this dataset. Change the extension to .info for a description of the dataset. download http://pacioos.org/voyager/index.html?b=-62.376931%2C42.495159%2C69.452305%2C-18.852497&s=1&t=m&o=sat:4:cunit:d46a0m0x1.5 http PacIOOS Voyager (Google Maps API) This URL provides a viewer and/or data access for this dataset. download https://pae-paha.pacioos.hawaii.edu/erddap/griddap/dhw_5km ERDDAP:griddap ERDDAP This URL provides a viewer and/or data access for this dataset. download https://pae-paha.pacioos.hawaii.edu/erddap/griddap/dhw_5km_lon360 ERDDAP:griddap ERDDAP This URL provides a viewer and/or data access for this dataset. download https://coralreefwatch.noaa.gov/product/5km/methodology.php http Related URL This URL provides additional information related to this dataset. information dataset 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. 2024-01-12T22:35:00Z Due to ongoing difficulty serving the entire time series aggregation through TDS, we are now limiting access to the latest 3 years. For the full time series, see PacIOOS ERDDAP instead. 2024-03-20T21:18:00Z Full time series aggregation now restored in TDS; no longer limited to latest data. 2024-04-04T07:21:00Z Due to ongoing difficulty serving the entire time series aggregation through TDS, we are now limiting access to the latest 3 years. For the full time series, see PacIOOS ERDDAP instead. This record was translated from NcML using UnidataDD2MI.xsl Version 2.3.