Analysis of Precipitation and Precipitable Water Vapor over Iraq for the Period  1948-2011

M. Ibrahim, Roaa

	Analysis of Precipitation and Precipitable Water Vapor over Iraq for the Period 1948-2011
Iraqi Journal of Science
Article 1, Volume 54, Issue 2, 2013, Pages 485-492
Author
Roaa M. Ibrahim
Abstract
The water vapor is one of the constituent elements of the rain and the superiority of its importance in the study of climate because it is the basis on which depends all the different aspects of condensation. The purpose of research is to analyze the time series of the Baghdad station andan analyze these series to see whether there is a relationship between these two variables. Obtained the data used in this research from the National Center for Environmental Prediction for the period from 1948 to 2011. The use of statistical criteria included linear regression and Mann Kandal test to find the link. The results of time series monthly presence decrease in rainfall and all months except October, either the results of time series of monthly amount of water vapor deposited emerged there is an increase for all months of the year, and the highest value of the rain appeared in the month of March, reaching a value to about 4.0 m³ during the year 1974. Man Kandal tests showed there was no links between rainfall values and the values of water vapor with years of schooling, while the correlation between rainfall and water vapor deposited do not appear only in the months (March, April, May, September and October) with a very low rates.
Keywords
Precipitation; water vapor; Linear Regression; statistical criteria

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