International Journal of Information Engineering and Electronic Business (IJIEEB)
IJIEEB Vol. 6, No. 4, 8 Aug. 2014
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Analysis of the Time Trends of Precipitation over Mediterranean Region
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Author(s)
Index Terms
Rainfall, Meteorological Radar, Markov Chain, Transition Probabilities
Abstract
Time trends of precipitation in the north of Algeria from meteorological radar are analysed. A probabilistic approach presented here proposes to study the evolution of the rainfall phenomenon in two distinct study areas, one located in sea and other located in ground. A decision criterion is established and based on radar reflectivity in order to classify the precipitation events located in both areas. At each radar observation, a state of precipitation is classified, either convective (heavy precipitation) or stratiform (average precipitation) both for the "sea" and for the "ground". In all, a time series of precipitation composed of three states; no raining, stratiform precipitation and convective precipitation, is obtained for each of the two areas. Thereby, we studied and characterized the behavior of precipitation in time by a Markov chain of order one with three states. Transition probabilities are calculated. The results show that rainfall is well described by a Markov chain of order one with three states. Indeed, the stationary probabilities, which are calculated by using the Markovian model, and the actual probabilities are almost identical.
Cite This Paper
Mourad Lazri, Soltane Ameur, Jean Michel Brucker, "Analysis of the Time Trends of Precipitation over Mediterranean Region", International Journal of Information Engineering and Electronic Business(IJIEEB), vol.6, no.4, pp.38-44, 2014. DOI:10.5815/ijieeb.2014.04.06
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