This work assessed the impact of aerosol-cloud-radiation (ACR) interactions on U.S. regional ozone and PM2.5 using the NASA Unified Weather Research and Forecasting modeling system. A series of three-month simulations have been carried out for the year 2010, in which the factor separation method has been applied in order to isolate the contributions from aerosol-radiation (AR), aerosol-cloud (A...

[1] Newly available data from extended weather stations and time period reveal that much of China has experienced significant decreases in cloud cover over the last half of the Twentieth century. This conclusion is supported by the analysis of the more reliably observed frequency of cloudfree sky and overcast sky. The total cloud cover and low cloud cover have decreased 0.88% and 0.33% per deca...

background: although ionizing radiation is widely used to diagnose many diseases, the relevant hazards are known to be as an important limitation of its application. it is believed that the awareness of ionizing radiation dose values is one of the main stages in patient's radiation protection. the purpose of this study has been to investigate the level of physicians' knowledge about r...

Most solar radiation models implemented in Geographical Information Systems (GIS) operate on 2.5D raster data. There are only a few models using the full 3D information of a point cloud obtained by e.g. Airborne Laser Scanning (ALS) systems. However, models performing point cloud based solar radiation modeling are not suitable for large study areas because the huge amount of point cloud data ca...

The electron cloud in positron storage rings is pinched when a bunch passes by. For short bunches, the radiation due to acceleration of electrons of the cloud is coherent. Detection of such radiation can be used to measure the density of the cloud. The estimate of the power and the time structure of the radiated signal is given in this paper. ∗Work supported by Department of Energy contract DE–...

Anthropogenic aerosols influence the earth's radiation balance and climate directly, by scattering shortwave (solar) radiation in cloud-free conditions and indirectly, by increasing concentrations of cloud droplets thereby enhancing cloud shortwave reflectivity. These effects are thought to be significant in the context of changes in the earth radiation budget over the industrial period, exerti...

Abstract Simulations of the global climate system at storm-resolving resolutions 2 km are now becoming feasible and show promising realism in clouds precipitation. However, shortcomings their representation microscale processes, like interaction cloud droplets ice crystals with radiation, can still restrict utility. Here, we illustrate how changes to microphysics scheme dramatically alter both ...

As widely accepted, the atmospheric aerosol strongly contributes to the formation of the earth’s radiation balance through the absorption and scattering of solar radiation. In addition to this direct influence on the radiation balance, aerosols, being active condensation nuclei, also have a role in the cloud formation processes. Consequently, we pay special attention to the block of aerosol stu...