Analisa Angin Zonal dan Meridional Dalam Menentukan Awal Musim Hujan di Kota Jambi

Abstract

In Indonesia, prediction models for the beginning of the rainy season have not developed intensively. Jambi City is the capital of Jambi Province as it has quite extensive rainfed gardens / fields and rice fields and contributes significantly to the economy of Jambi Province. Jambi City really needs an accurate prediction of the start of the rainy season to support the economic continuity through agriculture and plantations. This study aims to analyze the zonal and meridional wind components in the 1000 mb layer in determining the start of the rainy season in the city of Jambi. The prediction of the beginning of the season using zonal and meridional winds will be divided into 2 conditions, namely when the normal conditions of monthly rainfall in 1997-2017 and when the El Nino conditions are strong in 1997/1998 and 2015/2016. Based on data processing for 1997-2017, it shows that the beginning of the rainy season is December when the zonal wind speed is highest. In this study, the zonal wind component is more dominant than the meridional wind component in determining the start of the rainy season. However, when conditions are el nino, the zonal wind component is not good to become