Another look at the moist baroclinic Ertel–Rossby invariant with mass forcing
Yang Shuai1, †, Gao Shou-Ting1, 2, Chen Bin2
       

(color online) Horizontal distributions of (a) moist ERI anomaly (shaded, at 12 UTC 30, (b) moist ERI anomaly at 18 UTC 31, (c) MPV anomaly (shaded, ) at 12 UTC 30, and (d) MPV anomaly at 18 UTC 31 August 2010; superposed with geopotential height (isolines, dgpm) at 700 hPa.