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Projection Of Climate Suitability For Mangosteen Based On Climate Change Scenarios In West Sumatra To Support National Resilience Eka Alfred Sagala; Ernalem Bangun; Adi Subiyanto; Presly Panusunan Simanjuntak
International Journal Of Humanities Education and Social Sciences (IJHESS) Vol 3 No 5 (2024): IJHESS APRIL 2024
Publisher : CV. AFDIFAL MAJU BERKAH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55227/ijhess.v3i5.1015

Abstract

The West Sumatra Provincial Government began to improve the development of the plantation sector of mangosteen, because the mangosteen plant became a superior commodity in the Province of West Sumatra. In this regard, it is important to know the climate suitability of the mangosteen plant and its projections, which will be used to take development planning steps in the appropriate area and support the increase in exports of mangosteen plants in West Sumatra Province to support national resilience in the face of climate change. The data used were monthly rainfall observation data and monthly air temperature for the period 2006-2015 at 46 rain posts in West Sumatra Province. The Minangkabau Meteorological Station is used as a reference station for monthly air temperatures estimation in 45 other rain posts which were calculated using the Braak method. Besides, land physical data such as soil texture and slope were used in each district in West Sumatra Province. Projected data used the Representative Concentration Pathways (RCP) 4.5 scenario model for monthly air temperature and monthly rainfall from the Model for Interdisciplinary Research on Climate (MIROC5) model with resolutions up to 20 x 20 km in the period 2006-2040. The projection data was divided into the baseline period for 2006-2015 and the projection period of 2031-2040. The climate suitability period was made for the present period 2006-2015 and the future projections for the period 2031- 2040. The results showed that the area of West Sumatra Province for the Very Appropriate category (S1) was decreasing in the projection period of 2031-2040 compared to the 2006-2015 baseline period. This can be seen in the projection period of the Very Appropriate category (S1), the area was reduced to 2,584,234 ha (72%) while in the baseline period the Very Corresponding category (S1) reached 2,811,321 ha (78%).
Analisis Angin Zonal dan Meridional dalam Menentukan Awal Musim Hujan di Seram Bagian Barat Provinsi Maluku Eka Alfred Sagala; Ernalem Bangun; Adi Subiyanto
Jurnal Kewarganegaraan Vol 7 No 2 (2023): Desember 2023
Publisher : UNIVERSITAS PGRI YOGYAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31316/jk.v7i2.5842

Abstract

Abstrak Prakiraan awal musim dan curah hujan yang dikeluarkan BMKG sangat penting salah satunya bagi komoditas pertanian. Kriteria untuk penentuan awal musim ini sangat bervariasi, namun selama ini hanya didasarkan pada jumlah curah hujan tanpa mempertimbangkan indikator lain. Oleh karena itu penelitian ini bertujuan untuk menganalisis pengaruh angin zonal dan meridional dalam penentuan awal musim hujan maupun kemarau di wilayah penelitian Seram bagian barat. Selain itu, juga dideskripsikan hubungan curah hujan saat El Nino mengalami penguatan mengingat fenomena ini juga mempengaruhi sistem sirkulasi angin di wilayah penelitian. Data yang digunakan dalam penelitian ini berupa data angin zonal dan angin meridional bulanan dari NCEP (National Centre For Environmenttal), akumulasi curah hujan bulanan dari Stasiun Klimatologi Seram bagian barat, dan data ONI NOAA (Oceanic Nino Index NOAA). Dengan metode analisa deskriptif dan statistik dengan melibatkan analisa grafik maka diperoleh bahwa pola curah hujan menunjukkan pola lokal dimana awal musim hujan rata-rata dimulai pada bulan Mei. Analisa angin zonal dapat digunakan dalam menentukan awal musim hujan di Seram Bagian Barat saat tidak ada fenomena global. Hal ini diawali dengan berhembusnya angin zonal timuran dan awal musim kemarau ditandai dengan melemahnya angin zonal timuran yang selanjutnya angin zonal baratan mengalami penguatan. Sedangkan angin merdional dari selatan mengalami penguatan setelah puncak musim hujan terjadi dan melemah setelah puncak musim kemarau terjadi. Kata Kunci: Awal Musim, Angin Zonal, Angin Meridional, Curah Hujan Abstract Forecast of seasonal onset and the rainfall issued by BMKG is very important, one of which is for agricultural commodities. The criteria for determining the start of this season are very varied, but so far only based on the amount of rainfall without considering other indicators. Therefore this study aims to analyze the effect of zonal and meridional winds in determining the start of the rainy and dry seasons in the western part of the Seram research area. In addition, the relationship between rainfall during El NiƱo has also been strengthened, given the fact that this phenomenon also affects the wind circulation system in the research area. The data used in this study are zonal wind data and monthly meridional winds from NCEP (National Center for Environmenttal), monthly rainfall accumulation from the West Seram Climatology Station, and ONI NOAA (NOAA Oceanic Nino Index) data. With the method of descriptive analysis and statistics involving graph analysis, it is found that rainfall patterns show local patterns where the beginning of the average rainy season begins in May. Zonal wind analysis can be used to determine the start of the rainy season in West Seram when there are no global phenomena. This begins with the blowing of zonal winds and the beginning of the dry season is characterized by a weakening of the zonal winds of the timuran which further strengthens the zonal wind. Whereas the national wind from the south has been strengthened after the peak of the rainy season occurred and weakened after the peak of the dry season occurred. Keywords: Onset of Season, Zonal Wind, Meridional Wind, Rainfall