Fig. 2
From: A 0.01-degree gridded precipitation dataset for Japan, 1926-2020

Temporal variation of the number of available observation stations. Solid line indicates the number of hJMA stations for which we were able to identify the coordinates; dashed line indicates the total number of hJMA stations that have valid data; dotted line indicates the number of AMeDAS stations; dash-dotted line indicates the sum of AMeDAS and SSDB stations.