MSC 316 Lecture Notes - Lecture 20: High-Pressure Area, Normalized Difference Vegetation Index, Physiognomy

• School: University of Miami
• Department: Marine Science
• Course: MSC 316
• Professor: Gary Hitchcock

Document Summary

Reflectivity of wavelengths varies with soil, plant types, and physiological state. Plants reflect different spectral wavelengths according to their health. Highest for snow almost all is reflected back. Deciduous forest heavily skewed towards green. Sand absorbs more light than it gives off: ndvi. Water yields low + or values. Leaf area index, biomass, chlorophyll, rainfall, primary: how ndvi is computed production, etc. Two are sensitive to wavelength of light from 0. 55-0. 7 and 0. 73-1. 0. Calculated from visible and near-infrared light reflected by vegetation. Sparse vegetation reflects more visible light and less near- infrared light. Bare soil around 0. 2: indicates drought. Successive images in changes in vegetation can show drought. Can also show flooding as leading to exceptional vegetation. Can show seasonal progression to certain factors like in this case water supply. Low pressure system = lots of rain: enhanced vegetation index. Enhances vegetation signal compared to ndvi by: Improving sensitivity in high biomass regions better resolution.