نتایج جستجو برای: hydrometeors
تعداد نتایج: 346 فیلتر نتایج به سال:
A cloud resolving online chemistry transport model was developed based on WRF and has been used to study the transport of trace gases, the scavenging of soluble trace gases, and influences of lightning produced nitrogen oxides (NOx=NO+NO2) on local photochemistry. This presentation mainly focuses on the influence of the retention coefficient (i.e. the fraction of a dissolved trace gas which is ...
This study presents the results of a microwave-based algorithm which attempts to perform the retrieval of hydrometeor parameters in a profile form. The hydrometeors in question are both phases of the precipitating rain (liquid and frozen). The algorithm is called the Microwave Integrated Retrieval System (MiRS) which uses microwave radiances from AMSU and MHS sensors onboard NOAA-18, NOAA-19, M...
Lightning is observed to incept in thundercloud electric fields below the threshold value Ek for discharge initiation. To explain this, local enhancement of field by hydrometeors considered. The conditions onset positive corona discharges are studied air ellipsoidal geometries. A hydrometeor simulated as an individual charged conductor zero ambient field; there only a generated charge on surfac...
Bin microphysics schemes are useful tools for cloud simulations and often considered to provide a benchmark model intercomparison. However, they may experience issues with numerical diffusion, which not well quantified, the transport of hydrometeors depends on choice advection scheme, can also change simulation results. Here, an atmospheric large-eddy is adapted simulate statistically steady-st...
Atmospheric remote sensing has played a pivotal role in the increasingly sophisticated representation of clouds in the numerical models used to assess global and regional climate change. This has been accomplished because the underlying bulk cloud properties can be derived from a statistical analysis of the returned microwave signals scattered by a diverse ensemble comprised of numerous cloud h...
Better understanding of the vertical structures of clouds in the atmosphere is essential for more accurate radar, lidar, satellite retrievals, climate/weather numerical modeling, and even aviation safety issues regarding icing conditions (Fleishauer et al., 2002). However, an accurate estimate of liquid and ice phase hydrometeors in the clouds is still very challenging, and our limited knowledg...
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