Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Geographical distribution and climate factors [mean annual temperature (MAT), mean annual precipitation (MAP), and mean annual sunshine duration (MASD)] of the studied three test sites [Yi Ning (YN), Pi Zhou (PZ), and Qu Jing (QJ)].
| Site | Latitude (°N) | Longitude (°E) | Altitude (m) | MAT (°C) | MAP (mm) | MASD (h) |
| YN | 43.41 | 81.11 | 820 | 5.2 | 331 | 7.1 |
| PZ | 34.21 | 117.58 | 44 | 14.5 | 845 | 5.9 |
| QJ | 25.52 | 103.58 | 2,160 | 14.1 | 1,067 | 6.5 |
