A modified time-longitude diagram applied to 500 mb heights along 50° north and south

Klaus Fraedrich; Martin Lutz

doi:10.3402/tellusa.v39i1.11736

A modified time-longitude diagram applied to 500 mb heights along 50° north and south

Tellus

Volume 39 (1987): Issue 1

By: Klaus Fraedrich and Martin Lutz

Open Access

|Jan 1987

Abstract

The common time-longitude section (or Hovmöller diagram) shows longitude and intensity of troughs and ridges as a function of time. It is modified to a time-longitude lag-correlation diagram to yield statistically relevant estimates of zonal wavelengths, phase and group velocities. Different scales can be distinguished after the data sets have been treated by band- and low-pass filters. The lag-correlation analysis is applied to the 500 mb geopotential height along 50°N and 50°S for individual basepoints and averaged over the latitude circle. This technique is also useful if the local or zonally averaged dynamics of numerical models is to be statistically verified.

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Articles in this issue

DOI: https://doi.org/10.3402/tellusa.v39i1.11736 | Journal eISSN: 3035-9554

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Language: English

Page range: 25 - 32

Submitted on: Nov 21, 1985

Accepted on: May 5, 1986

Published on: Jan 1, 1987

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

© 1987 Klaus Fraedrich, Martin Lutz, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 39 (1987): Issue 1