เปรียบเทียบวิธี

	Degree Heating Weeks	การวิเคราะห์ลากรางจ์โดยใช้ทุ่นลอย
สาขาวิชา	สมุทรศาสตร์	สมุทรศาสตร์
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	2003	1985
ผู้ริเริ่ม	NOAA Coral Reef Watch	Robert Davis
ประเภท	thermal-metric	instrumental
แหล่งต้นตำรับ	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.	Davis, R. E. (1985). Drifter observations of coastal surface currents during CODE: The method and descriptive view. Journal of Geophysical Research, 90(C3), 4741-4755.
ชื่อเรียกอื่น	DHW, Thermal Stress Index	Lagrangian Tracking, Drifter Analysis
ที่เกี่ยวข้อง	3	3
สรุป	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.	Drifter Lagrangian analysis tracks the motion of water parcels using surface drifters (buoys with attached drogues) to measure ocean currents directly. Developed by Robert Davis in the 1980s, this method provides direct observation of water parcel trajectories and enables estimation of eddy diffusivity, transport pathways, and mixing. Drifter data complement Eulerian (fixed-point) observations by capturing the Lagrangian perspective of fluid motion.