| Some Aspects of the Influence of Abnormal Eastern Equatorial Pacific Ocean Surface Temperatures Upon Weather Patterns in the Southwestern United States. Volume II. |
DEC 1975 |
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| Authors:
Charles B. Pyke; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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 | The theories of the late Dr. J. Bjerknes concerning the influence of an abnormally warm equatorial Pacific Ocean upon weather patterns in the southwestern United States are investigated further. Atmospheric circulation and precipitation patterns during the equatorial warm-water seasons of 1957-1958 and 1972-1973 are compared to those of earlier seasons of this type. These examples further confirm Bjerknes' theory that a warm equatorial Pacific Ocean is associated with a strong ... |
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| Preliminary Study of the Atmospheric Circulation During the Period Preceding the 1972-73 El Nino. (A NORPAX Contribution), |
DEC 1974 |
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| Authors:
J. Bjerknes; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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| The National Environmental Satellite Service (NESS) and the National Oceanic and Atmospheric Administration (NOAA) have jointly started issuing monthly averaged maps of streamfunctions at 700 mb and 200 mb elevation covering the global belt from 48 degrees N to 48 degrees S. The streamfunctions represent only the nondivergent part of the air flow. To obtain a further approximation to the real air motion, rather weak fields of convergent motion can ... |
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| Morphology and Dynamics of Ionospheric Storms. |
07 SEP 1973 |
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| Authors:
S. V. Venkateswaran; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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| The document consists of five scientific reports. In the first report, computer programs are described which simulate ionospheric currents responsible for quiet-day ground magnetic variations at middle and equatorial geomagnetic latitudes. The program enables us to deduce the large-scale electrostatic fields generated by dynamo actions in the ionosphere. The second report describes a computer program for mapping of the ground magnetic potential pattern on any given day, either quiet or ... |
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| Analysis of the Rhythmic Variation of the Hadley Circulation over the Pacific during 1963-67. |
SEP 1973 |
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| Authors:
Jacob A. B. Bjerknes; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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| During 1963-67 the mid-Pacific equatorial ocean exhibited a sequence of rhythmic changes of temperature of approximately two-year periodicity. The atmospheric Hadley Circulation responded with increased intensity when the equatorial waters were at their highest temperature. In the present paper the tropical rhythms are described in more detail with Canton Island aeroological time series showing the thermal forcing from the ocean spreading upward to the upper troposphere. An additional study of ... |
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| Experimental and Theoretical Investigations of the Radiation Field of Planetary Atmospheres. |
AUG 1970 |
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| Authors:
C. R. Nagaraja Rao; Z. Zekera; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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| Detailed theoretical and experimental investigations of the problem of radiative transfer in planetary atmospheres have been made. Model atmospheres with progressive degrees of structural complexity have been investigated with a view to extending the theoretical solutions to the case of the real atmosphere. The effects of molecular anisotropy, turbidity and ground reflectivity have been taken into account in these theoretical studies. The experimental program was directed towards the evaluation of ... |
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| AN ATLAS OF POLARIZATION FEATURES OF LIGHT REFLECTED BY DESERT SAND, WHITE SAND AND SOIL, |
JAN 1969 |
278 pages |
| Authors:
C. R. Nagaraja Rao; Hsi-shu Chen; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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 | The results of an extensive series of measurements of the degree of linear polarization of light bidirectionally reflected by samples of desert sand, white sand and soil under various conditions of illumination are presented in graphical form. Measurements have been made in three spectral intervals (bandwidth approximately 150 A) centered on wavelengths 3970, 4865 and 5890A and 'white light' with a simple rotating analyzer type reflectometer. Simple Fourier series representations ... |
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| COLORIMETRIC DESCRIPTION OF RADIATION EMERGING FROM THE TOP OF A RAYLEIGH ATMOSPHERE, |
APR 1968 |
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| Authors:
C. R. Nagaraja Rao; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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| The trichromatic coefficients of light emerging from the top of a plane parallel, purely scattering Rayleigh (molecular) atmosphere have been computed. The extraterrestrial illumination from the sun is approximated with illumination from the CIE standard illuminant C. The ground is assumed to reflect radiation according to the Lambert law. The results are expressed in terms of the dominant wavelength and associated values of excitation purity. It is found that when ... |
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| OBSERVATIONS OF STRATOSPHERIC CLEAR-AIR TURBULENCE AND MOUNTAIN WAVES OVER THE SIERRA NEVADA MOUNTAINS: AN ANALYSIS OF THE U-2 FLIGHTS OF 13-14 MAY, 1964. |
DEC 1967 |
93 pages |
| Authors:
Roger A. Helvey; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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| Data obtained from a specially-instrumented U-2 aircraft have been used to relate clear-air turbulence with mountain wave structure, observed during two research flights in the stratosphere over the Sierra Nevada Mountains on 13 and 14 May, 1964. The several cases of severe turbulence encountered took place in regions immediately downstream of wave troughs, in area of decreased statis stability and slower wind speeds associated with the prevailing upwind tilt of ... |
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| GAIN COMPENSATED PHOTOPOLARIMETER FOR AIRBORNE MEASUREMENTS OF SKYLIGHT POLARIZATION, |
JUN 1967 |
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| Authors:
Gerald F. Chesebrough; Daniel F. Dibble; C. R. Nagaraja Rao; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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| The design and performance of a simple battery operated, electronic-servo governed photoelectric polarimeter are presented and discussed. A rotating Glan prism is used as the analyzer. Measurements of the degree of linear polarization and relative intensity variations can be made in four narrow spectral intervals (band width approximately equals 150 A) centered on wavelengths 3620, 4010, 5010 and 5990A. The variations in the intensity of the incoming light beam are ... |
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| DIAGNOSTIC STUDIES OF WEATHER SYSTEMS OF LOW AND HIGH LATITUDES (ROSSBY NUMBER |
APR 1967 |
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| Authors:
T. N. Krishnamurti; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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| A theory of a general balance model for small Rossby numbers, including effects of latent heat, friction and terrain is presented with some applications in high and low latitudes. |
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| OPTICAL INVESTIGATIONS OF THE ATMOSPHERE. |
APR 1967 |
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| Authors:
Z. Sekera; C. R. Nagaraja Rao; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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| The balanced program of experimental and theoretical investigations of problems encountered in atmospheric optics has been continued. Formal solutions to the problem of radiant energy transfer in a physically realistic medium exhibiting both scattering and true absorption have been extended to a stage when numerical computations are possible. The problem of inversion, solutions of which will to a great extent define the practicability of indirect optical methods to probe planetary ... |
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| ATMOSPHERIC TRANSMISSION OF LASER BEAMS. |
APR 1967 |
11 pages |
| Authors:
ZDENEK SEKERA; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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| After a thorough survey of the existing literature and experimental facilities available in the area, the program of investigations leading to the study of atmospheric limitations to the propagation of laser beams was outlined. (Author) |
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| INVESTIGATIONS OF THE POLARIZATION OF LIGHT REFLECTED BY NATURAL SURFACES |
JAN 1967 |
105 pages |
| Authors:
Hsi-shu Chen; C. R. Nagaraja Rao; Z. Sekera; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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| The polarization features of light reflected by soil, desert sand, white sand and water under different conditions of illumination with natural (unpolarized) and polarized light were investigated in three narrow spectral intervals (band width approximately 150A) centered on wavelengths 3975, 5000 and 6050A. A simple 'rotating-analyzer' type photoelectric reflectometer was used in the measurements. The data was acquired in computer compatible format to facilitate Fourier analysis of the photosignal. The ... |
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| ON THE PARTITIONING OF THE BAROCLINIC VERTICAL MOTIONS IN A DEVELOPING WAVE CYCLONE. |
MAY 1966 |
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| Authors:
T. N. Krishnamurti; Julia Nogues; Dave Baumhefner; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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| The simple quasi-geostrophic or a more general W-equation of a balanced model can be used in a unique manner to partition the vertical velocities. A study of such a partitioning determines the contributions by several baroclinic processes that are somewhat hard to see from a mere visual examination of the pressure and thermal fields on synoptic weather maps. The results of the quasi-geostrophic partitioning show that the thermal advection and ... |
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| THE STRUCTURE OF THERMAL CONVECTION IN THE LOWER ATMOSPHERE. |
FEB 1965 |
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| Authors:
Leonard O. Myrup; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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| An experimental study of atmospheric convection in lowest 100 m under conditions of strong surface heating and light winds is presented. Using an instrumented light aircraft, measurements were made of the fluctuating temperatures and vertical air speeds over a desert dry lake during the daytime. Root-mean-square values of these quantities and the convective heat flux were calculated and related to theoretical and laboratory results. (Author) |
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| INVESTIGATIONS OF THE POLARIZATION OF THE SUNLIT SKY. |
FEB 1965 |
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| Authors:
George C. Holzworth; C. R. nagaraja Rao; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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| Theoretical studies of the features of skylight polarization based on the solution of the radiative transfer problem in a plane-parallel molecular atmosphere are briefly reviewed. The results of a series of systematic measurements of skylight polarization are presented and discussed. The measurements were made at Los Angeles during Spring 1963. A photoelectric skylight polarimeter employing ac light modulation has been employed in these measurements which were confined to three spectral ... |
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| SURFACE WIND PATTERNS IN THE LOS ANGELES BASIN DURING 'SANTA ANA' CONDITIONS. |
SEP 1964 |
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| Authors:
James G. Edinger; Roger A. Helvey; David Baumhefner; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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| The results of an analysis of seven years of 'Santa Ana' wind situations is presented. The surface wind field over the greater Los Angeles area is presented first in statistical terms, percentage frequency of wind directions and mean wind speeds, and then as streamline analyses of individual situations. Areas of strong flow and weak flow are delineated as well as the diurnal fluctuations of the major features in the surface ... |
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| THE OBSERVED MEAN FIELD OF MOTION OF THE ATMOSPHERE. |
AUG 1952 |
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| Authors:
Yale Mintz; Gordon Dean; CALIFORNIA UNIV LOS ANGELES DEPT OF METEOROLOGY
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| What is observationally known about the atmosphere's mean horizontal motion has here been brought together in an empirical and objective manner. Except for limited use of the geostrophic wind law, there is no dependence on hydrodynamical theory: what actually takes place in the atmosphere is described without reference to preconceived ideas as to what should take place. Following meteorolotical convention, the periods chosen for the computation of the means are ... |
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