Fig. 1. Main keyword co-occurrence relationship network in geoscience fields in the YRB supported by the NSFC

Fig. 2. Interannual variation in NSFC funding related to hot research topics in the YRB. The color of the bubbles in the figure was only used to distinguish different keywords.

Fig. 3. Time series changes associated with the YRB research topics funded by the MST in 2002-2018

Fig. 4. Co-occurrence relationship of CNKI keywords in the YRB between 2002 and 2019

Fig. 5. Timeline visualization of co-citation network in literature associated with YRB. The size of the node represented the cited times of the literature, and the color of the ring represented the cited time. The red citation tree-rings represented that the number of citations in this year is increasing explosively. The appearance of pink ring indicated that the literature has a high betweenness centrality.

Fig. 6. Technical directions of earth system science and ecological research in the YRB