Laserfiche WebLink
<br />16 <br /> <br />Thus the NP PETS clearly constitute the main class of orographic clouds that <br /> <br />contributed to the orographic Tushar precipitation during the experimental <br /> <br />period. Their detailed investigation will need to be undertaken by analysis <br /> <br />with the radiometer, Ku-band radar, radiosondes, precipitation and mountaintop <br /> <br />riming data, since neither aircraft or C-band information is available from <br /> <br />the 1983 field experiment for these cases. Since these clouds are largely <br /> <br />orographic in nature, numerical model results for the available cases can <br /> <br />provide a useful tool for interpretation of the remote sensed data that is <br /> <br />available. <br /> <br />The other PETS, including even the area-wide PET, suggest a lesser but <br /> <br />important orographic contribution to the precipitation. Analyses incorporating <br /> <br />all of the instrument measurements for the full spectrum of the observed storms <br /> <br />can provide a good basis for establishing the spatial and temporal distribution <br /> <br />of liquid water and consequently the weather modification potential with those <br /> <br />respective storm types. This is particularly true for the area-wide and <br /> <br />cellular types for which a substantial data sample exists during five storm <br /> <br />episodes. <br /> <br />It must be remembered that the two case studies that follow are limited <br /> <br />to analyses for "area-wide" and "cellular" PETS and are based on measurements <br /> <br />from a subset of the complete instrumentation network. <br /> <br />~ <br /> <br />C. Study Area and Instrumentation Network <br /> <br />The weather modification research and operation activities described in <br /> <br />this report were conducted in the Tushar Mountain region of southern Utah. <br /> <br />During all or parts of this period, the research effort utilized a <br /> <br />complement of airborn, remote sensing, and ground-based instrumentation, <br /> <br />designed to maximize the information about the structure and microstructure <br /> <br />of these cloud systems. Figure 1 shows the location of the study area in <br /> <br />~ <br /> <br />~ <br />