Results 231 to 240 of about 1,187,144 (257)

Space-Time Spectral Analyses of Northern Hemisphere Geopotential Heights

Journal of the Atmospheric Sciences, 1983
Abstract A space-time spectral analysis of a long time series of observed geopotential heights for each season at several levels and latitudes of the Northern Hemisphere was performed as part of a continuing investigation of large-scale traveling waves. The data set that is analyzed consists of the first six zonal wavenumbers.
Peter Speth, Roland A. Madden
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Tropical-Extratropical Geopotential Height Teleconnections during the Northern Hemisphere Winter

Monthly Weather Review, 1986
Abstract Simultaneous and lagged correlation statistics have been calculated between time series of seasonal height anomalies at selected stations and extratropical grid-point anomalies in both hemispheres. The tropical stations in two major tropical precipitation zones, the Indo-China maritime continent and Africa, are well correlated with each other.
Kingtse C. Mo, Robert E. Livezey
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The influence of geopotential heights on New South Wales rainfall

Meteorology and Atmospheric Physics, 1997
An investigation of the relationships between New South Wales (NSW) seasonal rainfalls and fluctuations of geopotential height at four Australian radiosonde stations is presented. The connection between the Southern Oscillation Index (SOI) and the geopotential height was explored up to the mid-troposphere.
M. J. Nazemosadat, I. Cordery
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The linkage between geopotential height and monthly precipitation in Iran

Theoretical and Applied Climatology, 2018
This paper investigates the linkage between large-scale atmospheric circulation and monthly precipitation during November to April over Iran. Canonical correlation analysis (CCA) is used to set up the statistical linkage between the 850 hPa geopotential height large-scale circulation and monthly precipitation over Iran for the period 1968–2010.
Amin Shirvani, Amir Sabetan Fadaei, Willem A. Landman   +2 more
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Projection of time-mean geopotential heights onto normal, hough modes

Meteorology and Atmospheric Physics, 1988
Bernhard Haurwitz discussed theoretically the roles of forced stationary and traveling free waves in the atmosphere. At least some of the prediction errors of the large-scale weather are thought to result from the improper partitioning of energy between the forced stationary fields and free traveling or normal modes of the forecast models.
J. J. Tribbia, R. A. Madden
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Accuracy of Normal Heights Determined Using Improved Geopotential Models

Studia Geophysica et Geodaetica, 1997
The accuracy of determining the Molodensky normal heights using geopotential models has been investigated. On the basis of geopotential model JGM-3/OSU91A the Molodensky normal heights can be computed with an accuracy of about ±35 cm at the GPS sites in the central part of Europe. On the basis of JGM-3/OSU91A improved the accuracy becomes higher, about
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Autocorrelation Functions Computed from Daily 500 mb Geopotential Height Analyses

Monthly Weather Review, 1985
Abstract A method of computing autocorrelation fields with the aid of empirical orthogonal functions (EOF) is applied. The isotropic parts of the fields are separated, and a one-parameter model of the isotropic autocorrelation field is constructed. The approximation is compared with the Bessel representations discussed by others.
Juhani Rinne, Simo Järvenoja
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Persistence of Daily Geopotential Heights over the Southern Hemisphere

Monthly Weather Review, 1985
Abstract An analysis has been made of the persistence of geopotential heights at 1000 and 500 mb over the Southern Hemisphere for both summer and winter seasons. The focus is on lagged autocorrelation T0 the effective time between independent samples and low order autoregressive (AR) models fit to the data. A red noise AR(1) model provides the best fit
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Potential Predictability of Geopotential Heights over the Southern Hemisphere

Monthly Weather Review, 1985
Abstract An analysis of variance approach is used to estimate the potential predictability of interannual fluctuations of the seasonal mean flow over the Southern Hemisphere. The potential predictability of the 1000 and 500 mb geopotential height fields for both summer and winter is assessed.
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CORRELATIONS BETWEEN AREAL PRECIPITATION AND 850-MILLIBAR GEOPOTENTIAL HEIGHT

Monthly Weather Review, 1971
Abstract Geopotential heights of the 850-mb surface at 499 grid points over one-half of the Northern Hemisphere, extending from 10°E westward to 170°W, were correlated with daily precipitation observations over California and an area in the Eastern United States on 401 January and February days. Correlations as high as 0.69 were obtained between 850-mb
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