Time Spectral Analysis of Mid-Latitude DisturbancesSource: Monthly Weather Review:;1974:;volume( 102 ):;issue: 005::page 348Author:Hartmann, Dennis L.
DOI: 10.1175/1520-0493(1974)102<0348:TSAOML>2.0.CO;2Publisher: American Meteorological Society
Abstract: The method of time series analysis is used to study rawinsonde data in middle latitudes. The spectra reveal baroclinically unstable traveling waves with a preferred period of four to five days and a large amount of variance at lower frequencies. The preferred period of the longer-period waves is roughly 30 days, although the character of the disturbances in this range is highly variable. For the waves of periods between three and seven days, phase relations are derived for the northward component of the wind, the temperature, and the height of constant pressure surfaces. The phase relations are characteristic of traveling baroclinic waves and possess reasonable statistical significance. No stable phases were obtained for the eastward component of the wind or for the longer-period oscillations.
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contributor author | Hartmann, Dennis L. | |
date accessioned | 2017-06-09T16:00:32Z | |
date available | 2017-06-09T16:00:32Z | |
date copyright | 1974/05/01 | |
date issued | 1974 | |
identifier issn | 0027-0644 | |
identifier other | ams-58655.pdf | |
identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4199126 | |
description abstract | The method of time series analysis is used to study rawinsonde data in middle latitudes. The spectra reveal baroclinically unstable traveling waves with a preferred period of four to five days and a large amount of variance at lower frequencies. The preferred period of the longer-period waves is roughly 30 days, although the character of the disturbances in this range is highly variable. For the waves of periods between three and seven days, phase relations are derived for the northward component of the wind, the temperature, and the height of constant pressure surfaces. The phase relations are characteristic of traveling baroclinic waves and possess reasonable statistical significance. No stable phases were obtained for the eastward component of the wind or for the longer-period oscillations. | |
publisher | American Meteorological Society | |
title | Time Spectral Analysis of Mid-Latitude Disturbances | |
type | Journal Paper | |
journal volume | 102 | |
journal issue | 5 | |
journal title | Monthly Weather Review | |
identifier doi | 10.1175/1520-0493(1974)102<0348:TSAOML>2.0.CO;2 | |
journal fristpage | 348 | |
journal lastpage | 362 | |
tree | Monthly Weather Review:;1974:;volume( 102 ):;issue: 005 | |
contenttype | Fulltext |