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

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.
acknowledgement=NOAA Coral Reef Watch (CRW)
cdm_data_type=Grid
comment=This product is designed to improve on and replace the use of AVHRR Pathfinder SST for use within the Coral Reef Watch Program.
Conventions=CF-1.6, ACDD-1.3
date_metadata_modified=2021-03-30
Easternmost_Easting=179.975
geospatial_bounds=POLYGON ((-90 -180, 90 -180, 90 180, -90 180, -90 -180))
geospatial_bounds_crs=EPSG:4326
geospatial_lat_max=89.975
geospatial_lat_min=-89.975
geospatial_lat_resolution=0.049999999999999996
geospatial_lat_units=degrees_north
geospatial_lon_max=179.975
geospatial_lon_min=-179.975
geospatial_lon_resolution=0.049999999999999996
geospatial_lon_units=degrees_east
history=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.
id=CoralTemp-v3.1
infoUrl=https://coralreefwatch.noaa.gov/satellite/
institution=NOAA Coral Reef Watch (CRW)
instrument=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
instrument_vocabulary=GCMD Instrument Keywords
ISO_Topic_Categories=biota, oceans
keywords_vocabulary=GCMD Science Keywords
locations=Geographic Region > Global Ocean
locations_vocabulary=GCMD Location Keywords
metadata_link=https://www.pacioos.hawaii.edu/metadata/dhw_5km.html
naming_authority=org.pacioos
Northernmost_Northing=89.975
platform=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
platform_vocabulary=GCMD Platform Keywords
processing_level=Level 4
program=NOAA Coral Reef Watch (CRW)
project=NOAA Coral Reef Watch (CRW)
references=https://coralreefwatch.noaa.gov/product/5km/methodology.php
source=satellite data
sourceUrl=(local files)
Southernmost_Northing=-89.975
standard_name_vocabulary=CF Standard Name Table v39
testOutOfDate=now-60hours
time_coverage_duration=P1D
time_coverage_end=2024-12-03T12:00:00Z
time_coverage_resolution=P1D
time_coverage_start=1985-04-01T12:00:00Z
Westernmost_Easting=-179.975

本数据集包含一套NOAA珊瑚礁监视局（CRW）3.1版本操作级全球卫星珊瑚白化热应激监测产品，分辨率为5公里，每日近实时生成，包括海面温度（SST）、SST异常、热点、温度加热周（DHW）和漂白警报区域（BAA）。这些数据基于CoralTemp 1.0版本，该版本为每日全球5公里海面温度数据集，由以下数据源综合而成：（1）NOAA/NESDIS操作级近实时每日全球5公里地球静止轨道-极地轨道（geo-polar）混合夜间仅SST分析，（2）NOAA/NESDIS 2002-2016重处理每日全球5公里geo-polar混合夜间仅SST分析，以及（3）英国气象办公室1985-2002年每日全球5公里夜间仅SST再分析操作级SST和海冰分析（OSTIA）。SST异常是指与每日SST气候学相比的SST差异。珊瑚白化热点是一种特殊的海面温度（SST）异常，显示了与珊瑚白化SST阈值气候学的SST差异。DHW是连续12周内珊瑚白化热点的累积。在任何特定位置和任何特定时间的DHW值是至少高于漂白阈值SST 1度C的热点值与其在最近12周期间持续时间的乘积之和。一个DHW相当于SST高于阈值1度C的一周或高于阈值2度C的0.5周，等等。DHW的单位为度C周，将热应激的强度和持续时间合并为一个单一数值。根据珊瑚礁监视局的研究，当热应激达到4度C周时，可预期将出现显著的珊瑚白化，尤其是在更敏感的物种中。当热应激达到8度C周或更高时，可能会出现广泛的白化和因热应激而导致的死亡。