Methoden vergleichen
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| Wärmegradwochen× | Chlorophyll-a aus Ozeanfarbe× | |
|---|---|---|
| Fachgebiet | Ozeanographie | Ozeanographie |
| Familie | Process / pipeline | Process / pipeline |
| Entstehungsjahr≠ | 2003 | 1978 |
| Urheber≠ | NOAA Coral Reef Watch | Remote Sensing Community |
| Typ≠ | thermal-metric | bio-optical |
| Wegweisende Quelle≠ | Liu, G., Strong, A. E., & Skirving, W. (2003). Remote sensing of sea surface temperatures during 2002 Great Barrier Reef coral bleaching. EOS Transactions, 84(15), 137-141. link ↗ | Gordon, H. R., & Morel, A. Y. (1983). Remote Assessment of Ocean Color for Interpretation of Satellite Visible Imagery. Springer-Verlag. link ↗ |
| Aliasnamen | DHW, Thermal Stress Index | Chlorophyll-a Retrieval, Ocean Productivity Monitoring |
| Verwandt | 3 | 3 |
| Zusammenfassung≠ | Degree Heating Weeks (DHW) is a thermal stress metric that quantifies accumulated heat exposure above a coral bleaching threshold, computed from satellite sea surface temperature data. Developed by NOAA's Coral Reef Watch program in 2003, DHW provides a standardized index for predicting and monitoring coral bleaching stress globally. The metric combines intensity and duration of thermal anomalies to estimate cumulative physiological stress on coral colonies. | Ocean color remote sensing is the primary global method for retrieving seawater chlorophyll-a concentrations and phytoplankton productivity from satellite sensors. Based on bio-optical principles established in the 1970s, ocean color algorithms convert satellite spectral reflectance measurements into estimates of chlorophyll-a pigment concentration. This method enables global-scale, real-time monitoring of oceanic primary productivity and plankton dynamics. |
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