Fig. 4: Relationship between MODIS aerosol optical depth (AOD) and MODIS daytime LST (°C).
From: Limited influence of irrigation on pre-monsoon heat stress in the Indo-Gangetic Plain

Seasonal mean (April–May) during the period 2001–2020 for a AOD, b Daytime LST, c Scatter plot with Pearson’s correlation coefficient (r) for the Indo-Gangetic Plain. d Causal relationship between variables for Uttar Pradesh (UP) and Bihar: aerosol optical depth (AOD), evapotranspiration (ET) and daytime land surface temperature (LST) from MODIS using Granger causality test in vector auto-regression model (VAR) framework. The null hypothesis for the test is that lagged Variable1 do not explain the variation in Variable2.