Daily Global 5km Satellite Coral Bleaching Heat Stress Degree Heating Week
(Version 3.1, released August 1, 2018, experimental product)
Global Coral Bleaching Heat Stress Degree Heating Week image
Current Daily Variables:  DHW 
Regional Images:  45ns | Global | East | West | Pac. | Ind. | S.Atl. | Coral Triangle [big] | Caribbean [big] | Florida | Hawaii | GBR
Animations (30d):  45ns | Global | East | West | Pac. | Ind. | S.Atl. | Coral Triangle [big] | Caribbean [big] | Florida | Hawaii | GBR
Animations (90d):  45ns | Global | East | West | Pac. | Ind. | S.Atl. | Coral Triangle [big] | Caribbean [big] | Florida | Hawaii | GBR
Year-to-date Maximum: -----
Year-to-date Minimum: ----- ----- ----- -----
Year-to-date Mean: ----- ----- ----- -----

Click on map above to zoom to small 60 x 40-degree tiles; use drop-down menu below to view larger 60 x 40-degree tiles.     
Right-click outside clickable map area to save the image.     


Large 60 x 40-degree tiles (by hemisphere, updated daily):  



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.

This product is updated each afternoon at about 13:30 U.S. Eastern Time.

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