Degree Heating Weeks
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Data Formats Available
The DHW product shows accumulated thermal stress, which can lead to coral bleaching.
The scale goes from 0 to 16 degree-weeks. Spatial resolution is one-half degree.
The NOAA Coral Reef Watch (CRW) satellite twice-weekly 50 km coral bleaching Degree
Heating Weeks (DHW) product presented here accumulates the instantaneous bleaching
thermal stress (measured by HotSpots) during the most-recent 12-week period. DHW
product is directly related to the timing and intensity of coral bleaching. Significant
coral bleaching usually occurs when DHW values reach 4 °C-weeks. By the time DHW
values reach 8 °C-weeks, widespread bleaching is likely and significant mortality can
be expected. Spatial resolution is one-half degrees precisely.
Product description in the tutorial.
Technical details on the methodology page.