2017年11月30日 · 2.02.2.4.2 Stratus cloud systems. Stratus clouds are associated with mesoscale, or even synoptic, vertical air motions that arise from large-scale horizontal convergence and frontal or orographic lifting of moist air masses. The ascending motion of air is weak (i.e., a few tens of centimeters per second) relative to cumulus convection, but it ...

2019年11月15日 · Thus, deficient marine stratus clouds in SEP were suspected to be among factors responsible for the warm SST biases in the region, and therefore a contributing factor to the double ITCZ problem. Ma et al. (1996) investigated this notion by prescribing a stratus cloud cover, constant in time, off the Peruvian coast in a CGCM. They found that ...

Stratus and stratocumulus clouds are two dominant types of low stratiform cloud that together cover 30% of the Earth's surface. Both are thin boundary layer clouds that frequently occur as the sole cloud type under conditions of large-scale subsidence and strong lower-tropospheric static stability, but they can also exist mixed with higher ...

Stratocumulus and stratus clouds (Figures 14 and 15, respectively) are low-based (below 2 km AGL), shallow ‘stratiform’ clouds. They are almost always less than 1 km thick. They are composed of droplets unless the cloud top is cooler than about −5 to −10 °C in which case ice crystals may form.

2014年1月1日 · This type of cloud is often very similar to stratus in that it is a low overhanging blanket of cloud. It is distinguishable from stratus in that it has clearly identifiable elements. In the example of Figure 1.9 a, the elements are in the form of long lines or tessellations.

2024年12月1日 · Fog and low stratus (FLS) are of significant importance for many aspects of human life, such as seriously affecting land, sea, and air traffic safety by reducing visibility, acting as a modifier in the global climate system by changing the atmospheric radiation balance, and having ecological importance as the main water source of coastal deserts and tropical cloud …

2000年7月1日 · Cloud microphysical and bulk cloud water chemical sampling was conducted from a 10-m tower at night, to avoid ground-induced heating and cloud dissipation and to minimize contamination from vehicular traffic (Borys et al., 1998). The droplet size distribution was obtained from a PMS Forward Scattering Spectrometer Probe (FSSP-100HV) optical sensor.

1993年1月1日 · Today's cloud classification scheme is a combination of Howard's Latin names and Lamarck's organization into three etages, 1.2 Cloud Types Identified Visually 7 Table 1.1 Genera and Etages of Clouds Identified Visually Height of cloud base Genus Cumulonimbus Stratus Stratocumulus Nimbostratus Altostratus Altocumulus Cumulus } Etage Polar ...

2016年10月1日 · Under low stratus cloud conditions The low-cloud case was observed in detail by the three sensors at 14:00 and 20:00 LST on 27 September 2008, and at 02:00 and 08:00 LST on 28 September 2008. Surface temperature was 4–14 °C, the RH was 40–90% (although a cloud level at 2000–2500 m was almost 100%), and the wind speed was about 3 m/s ...

1993年6月1日 · Some water-insoluble residues are detected in cloud droplets. This result implies that water-insoluble particles found as the residues had wetting angles close to 0(Pruppacher and Klett, 1978 ). DISCUSSION Most of the residue masses m cloud droplets collected near the stratus cloud base would have acted as cloud condensation nuclei.