Analysis of Wind Patterns in North Madagascar: A Study by University of Toliara
University of Toliara's Physics Department conducted a study on wind patterns in the North of Madagascar, focusing on interannual variability. The study analyzed meteorological data from 1979 to 2017, using MATLAB software and ECMWF data. The research aims to understand the wind seasons, characteristics, and dates in the region to support the potential installation of wind turbines. Detailed analysis results and methodologies are presented in the study.
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UNIVERSITY OF TOLIARA SCIENCES FACULTY PHYSICS DEPARTMENT Dates analysis of wind in the North of Madagascar presented by: TAMO Andy 1
PLAN I. INTRODUCTION II. METHODOLOGY III. RESULTS IV. CONCLUSION 2
I. INTRODUCTION Figure 1: SouthEastAliz direction The wind is the consequence of the displacement of a consecutive air mass. The northern region of Madagascar is swept by a Southeast Aliz wind regime, known as "Varatraza" 3
I. INTRODUCTION The installation of wind turbines in this region requires the study of the wind at low altitude. Figure 2: Wind turbines park The general objective of this work is to study the interannual variability of the start dates and the end of the wind seasons north of Madagascar. 4
II. METHODOLOGY Data We used the meteorological data since 1979 to 2017 available on the ECMWF web site (www.ecmwf.int). Equipment As part of this work we used the Matlab Software 5
Study area Figure 3: Study area Latitude: 12 South and 13.5 South Longitude: 48.5 East and 50 East 6
Descriptive statistics Objective: To determine the characteristics of data Moving average Overall average Liebmann method "Anomalous Accumulation" Objective: To analysis the wind dates of the beginning and the end t AA t = x n x t n=1 With : x n :daily speeds 7 x ?verage daily speeds
III. RESULTS III.1. Results of data analysis: Figure 5 : wind period Peak to 365days or 11.97 months Which means that there is a wind pseudoperiod of about 1 year Figure 4 : windcharacteristics Annual average: 8.99 m / s Min: 8.19 m / s Max: 9.57 m / s Monthly average: 8.98 m / s Max: 12.16m / s Min: 5.82 m / s Daily average: 9m / s Max: 25.11 m / s Min: 0.67 m / s 8
III.2.Dates of Beginnings and end of the wind over the whole period of study. III.2.1. Dates of wind start: 9 Figure 6 : wind start
III.2.2. Dates of wind end: 10 Figure 7: wind end
III.2.3.Length of each wind season (1979-2017) 11 Figure 8 : wind length
IV.CONCLUSION The extreme north of Madagascar is a high wind potential region with an average of around 9 m / s. In this region, the frequency analysis showed that there is a wind season, it repeats every years. The beginning of wind is between April and May, while the end of wind season is generally located between October and November For perspective we will model and to forecast the beginnings, endings and durations of the wind seasons. 12
UNIVERSITY OF TOLIARA SCIENCES FACULTY PHYSICS DEPARTMENT Dates analysis of wind in the North of Madagascar presented by: TAMO Andy 14