[HTML][HTML] Influences of environmental relative humidity and horizontal scale of subcloud ascent on deep convective initiation
H Morrison, JM Peters, KK Chandrakar… - Journal of the …, 2022 - journals.ametsoc.org
This study examines two factors impacting initiation of moist deep convection: free-
tropospheric environmental relative humidity (ϕ E) and horizontal scale of subcloud ascent
(R sub), the latter exerting a dominant control on cumulus cloud width. A simple theoretical
model is used to formulate a “scale selection” hypothesis: that a minimum R sub is required
for moist convection to go deep, and that this minimum scale decreases with increasing ϕ E.
Specifically, the ratio of R sub 2 to saturation deficit (1− ϕ E) must exceed a certain threshold …
tropospheric environmental relative humidity (ϕ E) and horizontal scale of subcloud ascent
(R sub), the latter exerting a dominant control on cumulus cloud width. A simple theoretical
model is used to formulate a “scale selection” hypothesis: that a minimum R sub is required
for moist convection to go deep, and that this minimum scale decreases with increasing ϕ E.
Specifically, the ratio of R sub 2 to saturation deficit (1− ϕ E) must exceed a certain threshold …
Influences of environmental relative humidity and horizontal scale of
This study examines two factors impacting initiation of moist deep convection: free
tropospheric environmental relative humidity (φE) and horizontal scale of sub-cloud ascent
(Rsub), the latter exerting a dominant control on cumulus cloud width. A simple theoretical
model is used to formulate a “scale selection” hypothesis: that a minimum Rsub is required
for moist convection to go deep, and that this minimum scale decreases with increasing φE.
Specifically, the ratio of R2 sub to saturation deficit (1− φE) must exceed a certain threshold …
tropospheric environmental relative humidity (φE) and horizontal scale of sub-cloud ascent
(Rsub), the latter exerting a dominant control on cumulus cloud width. A simple theoretical
model is used to formulate a “scale selection” hypothesis: that a minimum Rsub is required
for moist convection to go deep, and that this minimum scale decreases with increasing φE.
Specifically, the ratio of R2 sub to saturation deficit (1− φE) must exceed a certain threshold …
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