Figure 1

The study area and the spatial distribution of weather stations in the QDM. Pink dots represent weather stations on the southern flank of the Qinling Mountains (31), orange dots represent weather stations on the northern flank of the Qinling Mountains (20), purple dots represent weather stations on the southern flank of the Daba Mountains (13), red dots represent weather stations on the northern flank of the Daba Mountains (20), and blue dots represent weather stations on the western flank of the Qinling–Daba mountains (34). Notes: the map is created via the software ArcGIS 10.2 and the related research marks and words are added. The data of the map is from the site: https://earthexplorer.usgs.gov/, https://data.cma.cn/.