2017年11月30日 · In general, thin stratus clouds are usually nonprecipitating, whereas thick stratus clouds (i.e., 1–2 km vertical extent) are capable of producing substantial widespread rain or snow. Although the classification of cloud systems in stratiform and convective is useful for observation purposes, it cannot be considered sharp ( Harrold and Austin ...

1993年1月1日 · Andrew J. Heymsfield Cloud Types and Occurrence The three most common types of clouds are stratus, cumulus, and cirrus. According to the Glossary of Meteorology (Huschke, 1970), stratus clouds are layers or patches of low, often grey, clouds that have very little definition and rarely produce precipitation.

2011年1月1日 · Stratus clouds do not produce halo phenomena except, possibly, at very low temperatures. Sometimes stratus clouds appear in the form of ragged patches. Cumulus —Detached clouds, generally dense and with sharp outlines developing vertically in the form of rising mounds, domes, or towers, of which the bulging upper part often resembles a ...

Stratocumulus clouds (Figure 14) differ from stratus clouds (Figure 15) because they have an obvious rather lumpy appearance at cloud base with darker and lighter regions due to embedded weak convection. These changes in shading represent variations in the liquid water content of the clouds, with the darker regions representing higher amounts ...

2019年11月15日 · The simulation of marine stratus clouds in the SEP region is still problematic in current GCMs. Fig. 2 shows the annual mean low-cloud fraction and surface shortwave cloud radiative forcing (SWCRF) in the region from CALIPSO observations and AMIP simulations of the models that participated in the CMIP5 model intercomparison project.

2011年1月1日 · It was noted earlier that under conditions supporting a cumulus-under-stratus regime, the clouds can resemble mini-cumulonimbus clouds. Jensen et al. (2000) go further and note that in a drizzling boundary layer, the evaporating drizzle can form cold-pools which produce propagating cells that resemble miniature squall lines.

2014年1月1日 · (a) Stratus and stratocumulus frequency is indicated by fraction of low clouds observed at each grid point that have bases less than 3 km altitude and layer thicknesses less than 3 km. (b) Frequency of moderately deep clouds (most likely moderately deep convective or frontal clouds) seen at each grid point that have bases less than 3 km and ...

In altostratus clouds (Figure 5), the dominance of ice causes a diffuse, amorphous appearance with striations or fallstreaks on the bottom because an observer is viewing relatively low concentrations of precipitation particles rather than a ‘cloud’ per se. Altostratus clouds are rarely less than 2 km thick and often have tops at the same heights as cirrus and cirrostratus clouds.

1993年5月1日 · On spatial distributions and inter-droplet dis- tances measured in stratus clouds with in-line holography. Atmos. Res., 29" 229-245. A basic assumption of numerical cloud modelling and cloud physics in general is that the cloud droplets and hydrometeors are randomly distributed in space.

2016年9月1日 · The fluxes, estimated by the model, were found to be close to the observations for clear sky and stratus clouds. In this study, CRE is estimated from the global horizontal irradiance (GHI) measurements and clear sky values, calculated by a radiative transfer model and aerosol information by a Cimel sun photometer.