
Interaction between the Land Surface and Atmosphere
Effect of Mesoscale Surface Heterogeneity on the Convective Boundary Layer
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New insight is obtained into the structure of theconvective atmospheric boundary layer(CBL) over surface heat flux variation on a scale ofthe order of 10 km. Aircraft data collected duringthe International H2O Project (IHOP_2002) and largeeddy simulation (LES) are used. The new insight includes the followings: First, the CBL changes from a quasi-stationarystate to a non-stationary state when forced by ahigh-amplitude surface heat flux variation. Second, the structure of the CBL in anon-stationary state cannot be described with themixed-layer similarity. Third, moisture advection by thesurfa...
New insight is obtained into the structure of the
convective atmospheric boundary layer
(CBL) over surface heat flux variation on a scale of
the order of 10 km. Aircraft data collected during
the International H2O Project (IHOP_2002) and large
eddy simulation (LES) are used.
The new insight includes the followings:
First, the CBL changes from a quasi-stationary
state to a non-stationary state when forced by a
high-amplitude surface heat flux variation.
Second, the structure of the CBL in a
non-stationary state cannot be described with the
mixed-layer similarity.
Third, moisture advection by the
surface-heterogeneity-induced mesoscale horizontal
flows plays a significant role in initiating moist
convection.
convective atmospheric boundary layer
(CBL) over surface heat flux variation on a scale of
the order of 10 km. Aircraft data collected during
the International H2O Project (IHOP_2002) and large
eddy simulation (LES) are used.
The new insight includes the followings:
First, the CBL changes from a quasi-stationary
state to a non-stationary state when forced by a
high-amplitude surface heat flux variation.
Second, the structure of the CBL in a
non-stationary state cannot be described with the
mixed-layer similarity.
Third, moisture advection by the
surface-heterogeneity-induced mesoscale horizontal
flows plays a significant role in initiating moist
convection.