Judul: Analysis of Hotspots, Precipitation, and Sea Surface Temperature Anomalies in East Tanjung Jabung Regency, Jambi
Abstrak: Kebakaran hutan dan lahan merupakan permasalahan serius yang terjadi setiap tahun di Indonesia. Penelitian ini bertujuan mengidentifikasi keterkaitan antara titik panas (hotspot), curah hujan, dan anomali Sea Surface Temperature (SST) sebagai indikator potensi terjadinya kebakaran gambut di Kabupaten Tanjung Jabung Timur. Penelitian ini dilaksanakan pada bulan September-Desember 2023. Data yang digunakan adalah data sekunder. Uji korelasi dilakukan antara data hotspot, curah hujan bulanan, dan SSTA Nino 3.4 pada tahun 2015-2022 untuk mengetahui adanya hubungan antara curah hujan dengan jumlah hotspot yang terdeteksi dan faktor yang memengaruhinya. Hasil dari penelitian ini adalah hubungan hotspot dengan curah hujan berkorelasi negatif dengan nilai r sebesar -0.401 yang termasuk dalam kategori cukup, dan hubungan hotspot dengan anomali SST berkorelasi positif. Hal ini menunjukkan bahwa jumlah hotspot di Kabupaten Tanjung Jabung Timur pada tahun 2015-2022 berkaitan erat dengan curah hujan, namun tidak terlalu erat dengan SST anomalies., Forest and land fires are a serious problem that occurs every year in Indonesia. This research aims to identify the relationship between hotspots, precipitation and Sea Surface Temperature Anomalies (SSTA) as indicators of the potential for peatland fires in East Tanjung Jabung Regency. This research was conducted in September-December 2023. The data used is secondary data. Correlation tests were carried out between hotspot data, monthly precipitation, and SSTA Nino 3.4 in 2015-2022 to determine the relationship between precipitation, the number of hotspots detected, and the factors that influence them. The results of this research are that the relationship between hotspots and precipitation is negatively correlated with an r value of -0.400 which is included in the sufficient category, and the relationship between hotspots and anomaly SST is positively correlated. These findings showed that the number of hotspots in East Tanjung Jabung Regency is closely related to precipitation but not too closely with SST anomalies.
Keyword: curah hujan, titik panas, kebakaran gambut, nino 3.4

Judul: The Effect of Rainfall and Forest and Land Fires in East Tanjung Jabung Regency, Jambi Province
Abstrak: Kabupaten Tanjung Jabung Timur merupakan salah satu kabupaten paling timur dari Provinsi Jambi dengan luasan lahan gambut terluas di Provinsi Jambi. Penelitian bertujuan untuk mengetahui pengaruh curah hujan dan kaitannya dengan hotspot sebagai indikator terjadinya kebakaran hutan dan lahan gambut di Kabupaten Tanjung Jabung Timur, Provinsi Jambi. Data yang digunakan dalam penelitian ini bersumber dari NASA FIRMS untuk hotspot dan NASA POWER untuk curah hujan yang dianalisis secara deskriptif dan korelasi. Hasil penelitian menunjukkan jumlah hotspot tahunan dari tahun 2018 – 2022 sebanyak 1696 titik dengan 1075 titik berada pada lahan gambut dan 621 lainnya pada lahan mineral. Peningkatan terjadi di tahun 2019 sebanyak 1636 titik disebabkan kejadian kebakaran yang menjangkau 5151,02 ha. Hasil analisis korelasi menunjukkan curah hujan dengan hotspot tidak memiliki korelasi yang signifikan dengan koefisien korelasi negatif kuat sehingga peningkatan hotspot diikuti dengan penuruan curah hujan, dan sebaliknya., East Tanjung Jabung Regency is one of the easternmost districts of Jambi Province and has the largest peatland area in Jambi Province. The research aims to determine the effect of rainfall and its relation to hotspots as an indicator of forest and peatland fires in East Tanjung Jabung Regency, Jambi Province. The data used in this study were sourced from NASA FIRMS for hotspots and NASA POWER for rainfall, which were analyzed descriptively and correlationally. The results of the study show that the number of annual hotspots from 2018 to 2022 is 1696, with 1075 points on peatlands and 621 others on mineral lands. The increase occurred in 2019 by 1636 points due to fire incidents that covered 5,151.02 ha. The results of the correlation analysis show that rainfall with hotspots does not have a significant correlation with a strong negative correlation coefficient, so an increase in hotspots is followed by a decrease in rainfall, and vice versa.
Keyword: Curah Hujan, hotspot, Kabupaten Tanjung Jabung Timur, Kebakaran Hutan dan Lahan

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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