*2.6. Koppen–Geiger Climate Classification Map*

The differences of four LAI products were also analyzed by referring to the global climate map classifying through Koppen–Geiger system [33]. The Koppen–Geiger climate map is based on a large dataset of long-term monthly precipitation and temperature stations, using a two-dimensional thin-plate spline interpolation method. The map is divided into five first level climate types, as tropical (type A), arid (type B), temperate (type C), cold (type D), and polar (type E). The map has 0.1◦ spatial resolution, and can be downloaded from http://people.eng.unimelb.edu.au/mpeel/koppen.html. Figure 2 shows the Koppen–Geiger climate map of China, and Table 2 explains the meaning of the legend.

**Table 2.** The meaning of Koppen–Geiger climate classification.


**Figure 2.** Koppen–Geiger climate classification over China.
