Trends and periodicities of rainfall over north Africa

Authors

  • FAWZIA I. MOURSY

DOI:

https://doi.org/10.54302/mausam.v51i2.1769

Keywords:

Rainfall series, Periodicities, Peaks, Trends, Moving averages

Abstract

Trends and periodicities in the annual rainfall of north Africa are studied using data for 45 stations having record lengths of over 60 year. Increasing or decreasing rainfall tendencies are found over large continuous areas in north Africa. These trends, however, are not significant over all the stations in the areas but only at a few places distributed at random. Wherever a trend is significant, It has persistence or a periodicity of more than 40 year. Quasi- Biennial Oscillation (QBO) is exhibited at several stations in the areas of increasing or decreasing trend. Similarly, the 11-year cycle (solar cycle) is also exhibited in both areas. The QBO and the solar cycle are both present at only six stations.

Downloads

Published

01-04-2000

How to Cite

[1]
F. I. MOURSY, “Trends and periodicities of rainfall over north Africa”, MAUSAM, vol. 51, no. 2, pp. 155–162, Apr. 2000.

Issue

Vol. 51 No. 2 (2000): MAUSAM

Section

Research Papers

License

Copyright (c) 2021 MAUSAM

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

All articles published by MAUSAM are licensed under the Creative Commons Attribution 4.0 International License. This permits anyone.

Anyone is free:

  • To Share - to copy, distribute and transmit the work
  • To Remix - to adapt the work.

Under the following conditions:

  • Share - copy and redistribute the material in any medium or format
  • Adapt - remix, transform, and build upon the material for any purpose, even
    commercially.