Prediksi Awal Musim Hujan di Jawa Menggunakan Data Luaran Regional Climate Model Version 3.1 (RegCM3)

Abstract

<em>Monsoon onset information plays an important role in setting up planting strategy for achieving optimum yield</em><em>. This study aimed to develop forecasting model for the monsoon onset in main rice growing area of Java used Regional Climate Model Version 3.1 (RegCM3). The forecasting models of the monsoon onset and September-Oktober-November (SON) rainfall data were developed using regression model that have the highest coefficient determination and the models were tested using likelihood ratio test. It was found that the forecasting models of the monsoon onset and September-Oktober-November rainfall data were polynomial orde 2 or cuadratic that have coefficient determination 69%, 74%, 80% and 86%. Likelihood ratio test found that RegCM3 rainfall data was not significantly different with observation rainfall data (</em>α = 0.05)<em>. Onset in Java between 25<sup>th</sup> until 34<sup>th</sup> of 10-days period (early September until early December).</em>

Recovery of Fish Community Suffered from Feminization by Endocrine Disrupting Chemicals (EDCs) in Surabaya River, East Java

“…High fluctuations in river water generally occur during the rainy season [27]. The season during sampling is included in the dry season according to online rainfall data from BMKG Perak I Surabaya Station (Appendix 9), because the start of the rainy season (AMH) is determined based on the amount of tendays rainfall more than 50 mm then followed by the next two bases [28].…”