Figure 5
From: Impact of multiple-scale circulation interactions on the spring diurnal precipitation over Luzon
(a) Horizontal distribution of diurnal anomalies (daily mean removed, denoted as Δ) of precipitation (ΔP, shaded) extracted from IMERG superimposed with the low-level wind field at 925 hPa [ΔV (925 hPa), vector] extracted from ERA5 and averaged for spring from 2001–2019. The times (14–02 h) represent the local time in the Philippines. (b) is related to (a), but instead represents the vertical cross-section of the diurnal anomalies of longitudinal wind (Δu, horizontal vector) and vertical wind (− Δω, vertical vector) averaged over 17–18°N. In (b), the diurnal anomalies of the vertical velocity (− Δω; shaded) and the original longitudinal wind (u, only positive values of u are contoured; interval is 0.5 m/s) averaged over 17–18°N are added for additional clarity. The symbol “x” indicates the eastward propagation of diurnal precipitation. This figure is created using the software of GrADS v2.1.1.b0.
