CoralTemp 5km gap-free analysed blended sea surface temperature over the global ocean. CoralTemp is derived from three different but related 5km daily gap-free SST data sets and provides an internally consistent SST product that stretches from 1985 to present: Operational Sea Surface Temperature and Sea Ice Analysis (OSTIA) Sea Surface Temperature Reanalysis (1985-2002), Geo-Polar Blended Night-only Sea Surface Temperature Reanalysis (2002-2016), Geo-Polar Blended Night-only Sea Surface Temperature Near Real-Time (2017 to present).

Analyzed blended sea surface temperature over the global ocean using night only input data. An SST estimation scheme which combines multi-satellite retrievals of sea surface temperature datasets available from polar orbiters, geostationary InfraRed (IR) and microwave sensors into a single global analysis. This global SST analysis provides a daily gap-free map of the foundation sea surface temperature at a 0.05º spatial resolution. This dataset was reprocessed in 2017.

This dataset contains monthly and 8-day-composites of nighttime sea surface temperature (SST) data produced as part of the AVHRR Pathfinder SST Project. The source data were created using Version 5.3 of the Pathfinder algorithm and the file is nearly but not completely compliant with the GHRSST Data Specifications V2.0 (GDS2). Source data were created by the NOAA National Centers for Environmental Information (NCEI). Multi-day composites were created by NOAA CoastWatch-West Coast and NOAA/SWFSC/ERD. spatial resolution = 0.0416667 degree https://www.nodc.noaa.gov/SatelliteData/pathfinder4km/

The GOES-POES dataset is a blended product, combining SST information from the Geostationary Operational Environmental Satellites (GOES) and the Polar-orbiting Operational Environmental Satellites (POES). This global SST analysis provides a daily gap-free map of the foundation sea surface temperature, generating high density SST data and improving the monitoring of small scale dynamic features in the coastal coral reef environment.

This dataset contains sea surface temperature (SST) data produced as part of the Advanced Very High Resolution Radiometer (AVHRR) Pathfinder SST Project, created using Version 5.2 of the Pathfinder algorithm and the dataset. Multi-day composites and composites of day and night datasets were generated by the Environmental Research Division (NOAA/NMFS/SWFSC/ERD). https://www.nodc.noaa.gov/SatelliteData/pathfinder4km/

The NOAA/NASA AVHRR Pathfinder v5 and v5.1 sea-surface temperature dataset is a reanalysis of historical AVHRR data that have been improved using extensive calibration, validation and other information to yield a consistent research quality time series for global climate studies. At 0.05 degrees per pixel (approximately 4 km/pixel), this dataset provides a global spatial coverage ranging from October 1981 - 2009. Our data holdings include descending passes (nighttime).

The Advanced Very High Resolution Radiometer (AVHRR) satellite sensors onboard the NOAA POES (Polar-orbiting Operational Environmental Satellites) satellite constellation have been collecting sea-surface temperature (SST) measurements since 1981. This dataset combines the NOAA/NASA AVHRR Pathfinder v4.1 dataset (January 1985 - January 2003) and the AVHRR Global Area Coverage (GAC) dataset (January 2003 - present) to provide a long time series of SST. These datasets are reduced-resolution legacy datasets and will be discontinued by NOAA in 2016. The dataset is composed of SST measurements from descending passes (nighttime). 3-day composites are only available for GAC, from 2003 - 2016.

CoralTemp 5km gap-free analysed blended sea surface temperature over the global ocean. CoralTemp is derived from three different but related 5km daily gap-free SST data sets and provides an internally consistent SST product that stretches from 1985 to present: Operational Sea Surface Temperature and Sea Ice Analysis (OSTIA) Sea Surface Temperature Reanalysis (1985-2002), Geo-Polar Blended Night-only Sea Surface Temperature Reanalysis (2002-2016), Geo-Polar Blended Night-only Sea Surface Temperature Near Real-Time (2017 to present).

The NOAA Coral Reef Watch (CRW) daily global 5km Sea Surface Temperature (SST) Anomaly product displays the difference between today's SST and the long-term average. The scale ranges from -5 to +5 °C. Positive values mean the temperature measured is warmer than average; negative values mean cooler than average.

The NOAA Coral Reef Watch (CRW) daily global 5km Coral Bleaching HotSpot product presented here measures occurrence and magnitude of instantaneous heat stress, potentially resulting in coral bleaching. The scale ranges from 0 to 5 °C. HotSpot values of 1 °C or more indicate heat stress leading to coral bleaching and are highlighted in yellow to dark red/brown colors.

The NOAA Coral Reef Watch (CRW) daily global 5km satellite coral bleaching Degree Heating Week (DHW) product presented here shows accumulated heat stress, which can lead to coral bleaching and death. The scale ranges from 0 to 20 °C-weeks. The DHW product accumulates the instantaneous bleaching heat stress, measured by CRW's Coral Bleaching HotSpot, during the most recent 12-week period. It is directly related to the timing and intensity of coral bleaching. Significant coral bleaching usually occurs when the DHW value reaches 4 °C-weeks. By the time the DHW value reaches 8 °C-weeks, widespread bleaching is likely and significant mortality can be expected.

The NOAA Coral Reef Watch (CRW) daily global 5km satellite Bleaching Alert Area (7-day maximum) product presented here outlines the areas where coral bleaching heat stress currently reaches various levels, based on our satellite sea surface temperature (SST) monitoring.

SST variability is often considerably higher at the much finer 5km spatial and daily temporal resolutions, when compared with CRW's heritage operational twice-weekly 50km (0.5-degree) monitoring product suite. Due to resulting day-to-day fluctuations between stress levels in highly-variable locations, the single-day 5km Bleaching Alert Area product does not consistently and adequately identify potentially harmful heat stress levels, especially with regard to accumulated heat stress impacts. Rather than requiring users to examine the single-day 5km Bleaching Alert Area product over several days, a 7-day maximum Bleaching Alert Area composite product, updated daily, was introduced in the Version 2 product suite and is maintained here in Version 3.1. (Evolution of CRW's daily global 5km product suites can be found here.) This 7-day composite product shows the maximum stress level that a satellite pixel has experienced during the most recent seven (7) consecutive days. Data and images are dated on the last day of the 7-day period. Notably, it is compatible with CRW's operational 50km twice-weekly Bleaching Alert Area product, as the 50km Bleaching Alert Area is based on a half-week (3 or 4 days) composite of 50km SSTs (but with much less SST variability due to its much coarser spatial resolution).

Even though the daily global 5km Bleaching Alert Area (7-day maximum) composite product is presented here, the coral bleaching heat stress levels defined in the table below are for the daily global single-day 5km Bleaching Alert Area product. The heat stress level at a 5km satellite data grid, on any day, is based on CRW's daily global 5km Coral Bleaching HotSpot and Degree Heating Week (DHW) products for that day. The daily global 5km Bleaching Alert Area (7-day maximum) composite product therefore is the maximum value of the seven, consecutive, daily global single-day 5km Bleaching Alert Area values in the data grid that end on the date shown in the image.