mhw_5km eng UTF8 dataset service NOAA Coral Reef Watch (CRW) coralreefwatch@noaa.gov https://coralreefwatch.noaa.gov http web browser information pointOfContact 2026-04-15 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 638 88298.0 area NOAA Coral Reef Watch Daily Global 5-km Satellite Monitoring Marine Heatwave Watch 2019-11-19 creation 2019-11-19 issued 2024-07-18 revision 1.0.1 org.pacioos mhw_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 Related publication: Hobday AJ, Oliver ECJ, Sen Gupta A, Benthuysen JA, Burrows MT, Donat MG, Holbrook NJ, Moore PJ, Thomsen MS, Wernberg T, Smale DA. 2018. Categorizing and naming marine heatwaves. Oceanography 31, 2. https://doi.org/10.5670/oceanog.2018.205. Marine heatwaves are modelled off their terrestrial namesakes and are prolonged periods of anomalously high sea surface temperature (SST). In effect, they are categorized SST anomalies. They are also a more general version of the Coral Reef Watch (CRW) daily global 5km coral bleaching "HotSpot" product. Rather than being aimed specifically at corals, however, they provide a more generalized description of marine heat stress that is likely applicable to a broader range of marine life. This daily global 5km-resolution Marine Heatwave Watch (MHW) product is derived by applying the marine heatwave algorithm of Hobday et al. (2018) to the daily global 5km "CoralTemp" SST data product. CoralTemp is one of the best and most internally consistent daily global 5km SST products available, which allowed for the creation of an accurate climatology. This enabled the derivation of an accurate, consistent MHW product (comprised of near real-time and historic components), stretching back over three decades. 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/mhw_5km.png Sample image. Earth Science > Climate Indicators > Atmospheric/Ocean Indicators > Extreme Weather > Heat/Cold Wave Frequency/Intensity 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 longitude latitude time theme CF Standard Name Table v39 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 the Coral Reef Watch 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 oceans 1 -179.97501 179.97501 -89.975 89.975 seconds 2024-07-01T12:00:00Z 2026-04-13T12:00:00Z 0.0 0.0 NOAA Coral Reef Watch Daily Global 5-km Satellite Monitoring Marine Heatwave Watch 2019-11-19 creation 2019-11-19 issued 2024-07-18 revision NOAA Coral Reef Watch (CRW) coralreefwatch@noaa.gov https://coralreefwatch.noaa.gov http web browser information originator Marine heatwaves are modelled off their terrestrial namesakes and are prolonged periods of anomalously high sea surface temperature (SST). In effect, they are categorized SST anomalies. They are also a more general version of the Coral Reef Watch (CRW) daily global 5km coral bleaching "HotSpot" product. Rather than being aimed specifically at corals, however, they provide a more generalized description of marine heat stress that is likely applicable to a broader range of marine life. This daily global 5km-resolution Marine Heatwave Watch (MHW) product is derived by applying the marine heatwave algorithm of Hobday et al. (2018) to the daily global 5km "CoralTemp" SST data product. CoralTemp is one of the best and most internally consistent daily global 5km SST products available, which allowed for the creation of an accurate climatology. This enabled the derivation of an accurate, consistent MHW product (comprised of near real-time and historic components), stretching back over three decades. 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 2024-07-01T12:00:00Z 2026-04-13T12:00:00Z 0.0 0.0 tight OPeNDAP Client Access https://pae-paha.pacioos.hawaii.edu/thredds/dodsC/mhw_5km OPeNDAP:OPeNDAP OPeNDAP THREDDS OPeNDAP download NOAA Coral Reef Watch Daily Global 5-km Satellite Monitoring Marine Heatwave Watch 2019-11-19 creation 2019-11-19 issued 2024-07-18 revision NOAA Coral Reef Watch (CRW) coralreefwatch@noaa.gov https://coralreefwatch.noaa.gov http web browser information originator Marine heatwaves are modelled off their terrestrial namesakes and are prolonged periods of anomalously high sea surface temperature (SST). In effect, they are categorized SST anomalies. They are also a more general version of the Coral Reef Watch (CRW) daily global 5km coral bleaching "HotSpot" product. Rather than being aimed specifically at corals, however, they provide a more generalized description of marine heat stress that is likely applicable to a broader range of marine life. This daily global 5km-resolution Marine Heatwave Watch (MHW) product is derived by applying the marine heatwave algorithm of Hobday et al. (2018) to the daily global 5km "CoralTemp" SST data product. CoralTemp is one of the best and most internally consistent daily global 5km SST products available, which allowed for the creation of an accurate climatology. This enabled the derivation of an accurate, consistent MHW product (comprised of near real-time and historic components), stretching back over three decades. 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 2024-07-01T12:00:00Z 2026-04-13T12:00:00Z 0.0 0.0 tight GetCapabilities https://pae-paha.pacioos.hawaii.edu/thredds/wcs/mhw_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 Daily Global 5-km Satellite Monitoring Marine Heatwave Watch 2019-11-19 creation 2019-11-19 issued 2024-07-18 revision NOAA Coral Reef Watch (CRW) coralreefwatch@noaa.gov https://coralreefwatch.noaa.gov http web browser information originator Marine heatwaves are modelled off their terrestrial namesakes and are prolonged periods of anomalously high sea surface temperature (SST). In effect, they are categorized SST anomalies. They are also a more general version of the Coral Reef Watch (CRW) daily global 5km coral bleaching "HotSpot" product. Rather than being aimed specifically at corals, however, they provide a more generalized description of marine heat stress that is likely applicable to a broader range of marine life. This daily global 5km-resolution Marine Heatwave Watch (MHW) product is derived by applying the marine heatwave algorithm of Hobday et al. (2018) to the daily global 5km "CoralTemp" SST data product. CoralTemp is one of the best and most internally consistent daily global 5km SST products available, which allowed for the creation of an accurate climatology. This enabled the derivation of an accurate, consistent MHW product (comprised of near real-time and historic components), stretching back over three decades. 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 2024-07-01T12:00:00Z 2026-04-13T12:00:00Z 0.0 0.0 tight GetCapabilities https://pae-paha.pacioos.hawaii.edu/thredds/wms/mhw_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 Daily Global 5-km Satellite Monitoring Marine Heatwave Watch 2019-11-19 creation 2019-11-19 issued 2024-07-18 revision NOAA Coral Reef Watch (CRW) coralreefwatch@noaa.gov https://coralreefwatch.noaa.gov http web browser information originator Marine heatwaves are modelled off their terrestrial namesakes and are prolonged periods of anomalously high sea surface temperature (SST). In effect, they are categorized SST anomalies. They are also a more general version of the Coral Reef Watch (CRW) daily global 5km coral bleaching "HotSpot" product. Rather than being aimed specifically at corals, however, they provide a more generalized description of marine heat stress that is likely applicable to a broader range of marine life. This daily global 5km-resolution Marine Heatwave Watch (MHW) product is derived by applying the marine heatwave algorithm of Hobday et al. (2018) to the daily global 5km "CoralTemp" SST data product. CoralTemp is one of the best and most internally consistent daily global 5km SST products available, which allowed for the creation of an accurate climatology. This enabled the derivation of an accurate, consistent MHW product (comprised of near real-time and historic components), stretching back over three decades. 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 2024-07-01T12:00:00Z 2026-04-13T12:00:00Z 0.0 0.0 tight NetCDFSubsetService https://pae-paha.pacioos.hawaii.edu/thredds/ncss/mhw_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. heatwave_category byte marine heatwave category. This variable provides a measurement of daily sea surface temperature anomaly (SST Anomaly) based on an intensity classification algorithm for tracking marine heatwaves. Its value determines the contribution of the daily SST anomlay to the occurrence of a marine heatwave event and/or duration and intensity of an ongoing event. The value range is: 0 - No contribution to a marine heatwave event; 1 - Category I (Moderate); 2 - Category II (Strong); 3 - Category III (Severe); 4 - Category IV (Extreme); 5 - Category V (open-end beyond Extreme). Product description is provided at https://coralreefwatch.noaa.gov/product/marine_heatwave/index.php. mask byte 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. lon float longitude (longitude) lat float latitude (latitude) time int reference time of the data (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=mhw_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/mhw_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=-73.209964%2C-180%2C76.282447%2C180&s=1&t=m&o=sat:52:index:d64a0m1x5 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/mhw_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/mhw_5km_lon360 ERDDAP:griddap ERDDAP This URL provides a viewer and/or data access for this dataset. download https://coralreefwatch.noaa.gov/product/marine_heatwave/ http Related URL This URL provides additional information related to this dataset. information dataset 2021-09-22T12:00:00Z Initial version released: v1.0. 2021-09-22T12:00:00Z Version 1.0.1 released. Fixed minor compatibility issue loading data into GIS applications by altering dimension names and coordinate variable names. 2023-01-05T19:26:00Z 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. 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. 2024-07-18T19:00:00Z Due to changes in data format from CRW, time series aggregation is no longer possible with files before July 1, 2024. This record was translated from NcML using UnidataDD2MI.xsl Version 2.3.