เปรียบเทียบวิธี

	ดัชนีการระเหยคายน้ำจากปริมาณน้ำฝนแบบมาตรฐาน	NDVI
สาขาวิชา	ธรณีฟิสิกส์	ธรณีฟิสิกส์
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	2010	1973
ผู้ริเริ่ม	Vicente-Serrano, Beguería, and López-Moreno	Rouse, Haas, Schell, and Deering
ประเภท	Probability-based water deficit indicator	Spectral index for vegetation assessment
แหล่งต้นตำรับ	Vicente-Serrano, S. M., Beguería, S., & López-Moreno, J. I. (2010). A multiscalar drought index sensitive to global warming: the Standardized Precipitation Evapotranspiration Index. Journal of Climate, 23(7), 1696-1718.	Rouse, J. W., Haas, R. H., Schell, J. A., & Deering, D. W. (1973). Monitoring vegetation systems in the Great Plains with ERTS. Third Earth Resources Technology Satellite Symposium Proceedings, 1, 309-317.
ชื่อเรียกอื่น	SPEI	NDVI
ที่เกี่ยวข้อง	3	3
สรุป	The Standardized Precipitation Evapotranspiration Index (SPEI) is a climate index that combines precipitation and temperature (via reference evapotranspiration) to characterize water deficits and droughts. Developed by Vicente-Serrano and colleagues in 2010, SPEI extends the SPI framework to account for the combined effect of precipitation deficiency and increased evaporative demand from warming, providing a more physically-based drought metric than precipitation-only indices.	The Normalized Difference Vegetation Index (NDVI) is a spectral index computed from satellite or aerial multispectral imagery that quantifies vegetation greenness and vigor. Introduced by Rouse and colleagues in 1973 using Landsat data, NDVI has become the most widely used remote sensing metric for vegetation monitoring, drought assessment, crop productivity forecasting, and land cover change detection.