Albedo is the portion of light that is reflected by an object compared to the value of light that hits the object; it’s the ratio of reflected light to the incident light. Measuring albedo ranges between 0(none of the incident light is reflected) and 1(all the amount of light is reflected). It is also expressed by percentage.
In the same geographic area, the percentage of albedo may change within the year due to physical phenomena or biases such as clouds in low resolution images. Analyzing this parameter with its tentative and special variations and relating them with other predictable variables provide information on desertification operations. For instance, the albedo of a bare soil decreases (less light reflection) as its water content rises. The albedo of vegetation depends on its land coverage and its chlorophyll’s activity. Several works require to study the relationship between albedo and desertification (mostly the relation between albedo and variation of vegetation land coverage in arid regions, and the relationship between albedo and climate changes).
