Fig. 2: Annual cycle of TT gradient (ΔTT).
From: Present and future of the South Asian summer monsoon’s rainy season over Northeast India
The climatological daily mean ΔTT are shown from observation (NCEP-v3, green, 1976–2015) and from ensemble mean of CMIP6 models, both on Historical (blue, 1979–2014) and Projection with SSP5–8.5 scenario (red, 1970–2100). The start and end of ‘zero crossings’ of ΔTT defined as the ‘Onset’ and ‘Withdrawal’ dates of the summer monsoon, and the days between them are the ‘Length of Rainy Season (LRS).’ The North and South box for computing ΔTT is shown in the inset figure. The ΔTT for three regions over South Asia are a NEI, b CI, and c All India (AI).
