Fig. 6: Simulations of interannual variability and its trends by CMIP6 over NEI.
From: Present and future of the South Asian summer monsoon’s rainy season over Northeast India

The box averaged time series and its linear trends of anomalous a onset day, b withdrawal day, c LRS, d TISM, e accumulated rainfall, f VIMFC, g Wind convergence at 850 hPa, and h precipitable water are shown from ensemble mean of CMIP6 models. The 95% significance level of trends is tested with the Mann–Kendall nonparametric method. The trend with p < 0.05 is significant. Here, the +ve (−ve) anomaly of onset day means ‘delay (early)’ monsoon onset and vice versa for withdrawal day. Historical (1850–2014, blue) and Projection with SSP5–8.5 (2015–2100, red). The computations for d–h are done for the summer monsoon season (i.e., days between ‘Onset’ and ‘Withdrawal’ day for a year, as defined from ΔTT). The offset between the ensemble mean simulated over the historical period and the ensemble mean projected variables in 2010 is adjusted for display.