|Statement||A.D. Marrs ; supervised by T.W. Choularton.|
|Contributions||Choularton, T.W., Physics.|
California, to study aerosol-cloud interactions in the climatically important regime of the eastern Pacific ma-rine stratocumulus [Lu et al., ; P. H. Daum et al., Microphysical properties of stratus/stratocumulus clouds during the Marine Stratus/Stratocumulus Experi-ments (MASE), manuscript in preparation, ]. During MASE, aerosol Cited by: For a given sea surface and geostrophic wind speed, stratocumulus clouds can grow higher with smaller large-scale subsidence as less dry air entrains into the cloud. Clouds grow higher with higher sea surface temperature for a given geostrophic wind speed and large-scale subsidence as a result of enhanced moist by: 8. A one-dimensional model with second order turbulence closure has been developed and used to investigate processes in the cloud-topped marine atmospheric boundary layer. Model developments were required to correctly apply surface flux terms near the sea surface, poor representation of which is common to several models from the recent : Elizabeth C. Kent. The open-cell region has much lower cloud albedo than closed cells. Aside from that, previous observational and modeling studies have suggested that open- and closed-cell regions are different in many other aspects, such as concentration of cloud condensation nuclei (CCN), cloud droplet number and size, precipitation efficiency, and cloud : H. Wang, G. Feingold.
Z–LWC diagrams. In this study, the authors investigate the processes of formation of the Z–LWC rela-. tionships using a new trajectory ensemble model of the cloud-topped boundary layer (BL). In the model, the entire volume of the BL is covered by Lagrangian parcels advected by . Numerical models properly reproducing the DSDs (and drizzle) formation can serve as a connecting link between microphysical and radiative (e.g., radar reflectivity) properties of the clouds. The purpose of this study is to reproduce Z–LWC diagrams derived from in situ measurements in warm stratocumulus clouds and to reveal physical mechanisms leading to different regimes in the Z–LWC diagrams using a numerical model Cited by: Since both ozone and stratocumulus are important in the earth-atmosphere energy balance, the processes studied here are important in the system interactions that govern climate. The approach is analysis of observational data from the Dynamics and Chemistry of Marine Stratocumulus . 15 thick. Both stratus and stratocumulus clouds are usually contained in the atmospheric boundary 16 layer. 17 Stratocumulus is the most common cloud type globally (Warren et al. , ), covering 18 approximately one-fifth of Earth’s surface in the annual mean (23% of the ocean surface and 19 12% of the land surface).File Size: 1MB.
The kinematic model reduces the stratocumulus-topped marine boundary layer dynamics to a single circulation cell that spans the entire boundary-layer depth. The model produces significantly less drizzle than estimated from the observations, and possible reasons for Cited by: 7.  This paper is the first of a series dedicated to an observational study of the aerosol indirect effect in marine stratocumulus clouds. The data were collected in , during the second Aerosol Characterization Experiment (ACE-2) CLOUDYCOLUMN experiment, conducted over the eastern Atlantic Ocean, in the vicinity of the Canary Islands. Numerical simulation of the diurnal cycle of marine stratocumulus during FIRE—An LES and SCM modelling study October Quarterly Journal of the Royal Meteorological Society () - . It is noted that the results presented here disagree with Gerber et al. (), who used data from the Second Dynamics and Chemistry of the Marine Stratocumulus field study (DYCOMS II) to suggest that entrainment in marine Sc may be isothermal because the entrainment interface layer has been conditioned by detrained cloud droplets. The results presented here show that the higher evaporative cooling rate coupled with the lower sedimentation rate in polluted clouds Cited by: