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Showing papers on "Cloud computing published in 1975"


Journal ArticleDOI
Takao Takeda1
TL;DR: In this paper, the evolution of a precipitating convective cloud was studied by a time-dependent numerical model in which for the simplification of dynamical framework the domain under consideration was expressed by three regions: inner region of cloud, outer region of clouds and environmental region.
Abstract: The evolution of a precipitating convective cloud was studied by a time-dependent numerical model in which for the simplification of dynamical framework the domain under consideration was expressed by three regions: inner region of cloud, outer region of cloud and environmental region. Clouds are assumed to have no ice-phase. The size distribution of water drops is described using five size-groups.

5 citations


Journal ArticleDOI
TL;DR: In recent years the specializations of cloud microphysics, cloud dynamics, laboratory and theoretical cloud modeling, and radar meteorology have become so interrelated that they can hardly be considered as separate disciplines.
Abstract: In recent years the specializations of cloud microphysics, cloud dynamics, laboratory and theoretical cloud modeling, and radar meteorology have become so interrelated that they can hardly be considered as separate disciplines. By combined use of these techniques and tools, the cloud physicist has made significant advances in our understanding of the complex physics and dynamics of clouds. The purpose of this report is to review major advances in laboratory and field observations of clouds, cloud modeling, and radar meteorology.

3 citations


29 May 1975
TL;DR: In this article, a new evaluation of a ruby lidar ceilometer was performed at AFCRL as part of a program to evaluate the applicability of lasers to determine cloud height for airfield use.
Abstract: : A new evaluation of a ruby lidar ceilometer was performed at AFCRL as part of a program to evaluate the applicability of lasers to determine cloud height for airfield use. Comparitive measurements of cloud height were made with a standard Air Force rotating beam ceilometer (RBC). Examination of the test results shows the lidar indicates an accurate presentation of cloud structure. The RBC cloud return is affected by its geometry and by multiple scatter in the cloud. As a result, the measurement is not a true representation of cloud structure. These effects also bias the RBC to indicate higher cloud heights. However, the difference in cloud heights as measured by the two systems is not significant. Therefore, it is concluded that the lidar is a superior cloud height measuring device and both techniques provide operationally useful indications of cloud height. (Author)

1 citations


01 Nov 1975
TL;DR: In this paper, low level aircraft equipped with Inertial Navigation Systems (INS) were used to define the vertical extent and horizontal motion of a cloud and to measure the ambient wind field.
Abstract: Low level aircraft equipped with Inertial Navigation Systems (INS) were used to define the vertical extent and horizontal motion of a cloud and to measure the ambient wind field. A high level aircraft, also equipped with an INS, took photographs to describe the horizontal extent of the cloud field and to measure cloud motion. The aerial photographs were also used to make a positive identification in a satellite picture of the cloud observed by the low level aircraft. The experiment was conducted over the tropical oceans in the vicinity of Florida, Puerto Rico, Panama and in the Western Gulf of Mexico. Results for tropical cumulus clouds indicate excellent agreement between the cloud motion and the wind at the cloud base. The magnitude of the vector difference between the cloud motion and the cloud base wind is less than 1.3 m/sec for 67% of the cases with track lengths of 1 hour or longer. The cirrus cloud motions agreed best with the mean wind in the cloud layer with a vector difference of about 1.6 m/sec.