Fig. 2: Temporal variations of daily precipitation δ18O at Nanjing relative to regional rainband evolution.
a Time series of daily precipitation δ18O at Nanjing from ten days before the onset to ten days after the retreat of each Meiyu season from 2012 to 2016. b Latitude-time plot of daily precipitation amount (mm day-1) averaged over the longitude band of 110–122°E during the same periods. c and d Same as (a) and (b) but for 2017–2021. Red circles highlight the ten highest δ18O observations, and blue circles highlight the ten lowest δ18O observations within Meiyu seasons from 2012 to 2021. Dashed vertical lines with dates indicate the onset and retreat of each Meiyu season. Dotted horizontal lines depict the latitude of Nanjing.
