Judul: Penyerapan Karbon dan Skenario Net Zero Carbon Emission per Kapita: Studi Kasus Hutan Tanaman Pinus (Pinus merkusii) di KPH Kediri
Abstrak: Meningkatnya emisi CO2 di udara menimbulkan kekhawatiran dan merasa perlu melakukan pengukuran kandungan karbondioksida dan laju sekuestrasi karbondioksida secara berkala. Salah satu upaya untuk memitigasi emisi CO2 adalah dengan melakukan penanaman untuk diserap oleh vegetasi. Hutan mempunyai kemampuan untuk menyerap karbon dan melakukan sekuestrasi. Tujuan penelitian ini untuk menghitung besaran laju sekuestrasi karbondioksida pinus per kg/pohon/tahun, mengidentifikasi besaran emisi per kapita, dan menyusun skenario net zero carbon emission untuk memitigasi emisi CO2. Metode pengambilan data menggunakan stratified sampling. Analisis data pendugaan biomassa, karbon menggunakan persamaan allometrik.. Skenario net zero carbon emission yaitu melalui penanaman, pembayaran carbon credit, dan pembayaran carbon tax. Hasil penelitian menunjukkan laju sekuestrasi karbondioksida pohon pinus sebesar 27,08 kg/pohon/tahun. Emisi per kapita Jakarta 4 ton CO2/tahun. Skenario penanaman pohon pinus untuk menetralkan emisi jakarta sebanyak 148 pohon. Pembayaran carbon credit menggunakan lembaga Environmental Protection Agency sebesar Rp1.409.764/tahun. Skenario pembayaran carbon tax emisi Jakarta sebesar Rp120.000/tahun, The increasing CO2 emissions in the air raise concerns and feel the need to periodically measure carbon dioxide content and carbon dioxide sequestration rates. One of the efforts to mitigate CO2 emissions is by planting to be absorbed by vegetation. Forests have the ability to sequester carbon and perform sequestration. The purpose of this study is to calculate the amount of pine carbon dioxide sequestration rate per kg/tree/year, identify the amount of emissions per capita, and develop a net zero carbon emission scenario to mitigate CO2 emissions. The data collection method uses stratified sampling. Analysis of biomass, carbon estimation data using allometric equations. The net zero carbon emission scenario is through planting, carbon credit payments, and carbon tax payments. The results showed a pine tree carbon dioxide sequestration rate of 27.08 kg/tree/year. Jakarta's per capita emissions are 4 tons of CO2/year. The scenario of planting pine trees to neutralize Jakarta's emissions is 148 trees. Carbon credit payment using the Environmental Protection Agency amounting to Rp1,409,764/year. Jakarta's carbon tax emission payment scenario is Rp120,000/year.
Keyword: sequestration, Pinus merkusii, carbon emission, net zero emission

Judul: Pendugaan potensi simpanan karbon pada tegakan Pinus (Pinus merkusii Jungh. et de Vriese) di KPH Cianjur, Perum Perhutani Unit III Jawa Barat dan Banten
Abstrak: Global warming is one of the major environmental issues that currently concern to the various parties. Because of global warming, increasing in average temperature of earth's sea and land caused by industrial activity and reduction of forest cover due to deforestation, especially lately. Based on these evolving issues and considering the importance of the role of forests in absorbing carbon from the air and store it in forest biomass, it is necessary a lot of research that could encourage the continued development of carbon in biomass. One important aspect of research is to know the potential of carbon stored in the stands of pine. The experiment was conducted in KPH Cianjur, Perum Perhutani Unit III West Java and Banten in April 2010 to May 2010. Materials used in this research were planting stands of pine in 1994 on square 27A RPH West Hanjawar BKPH South Sukanagara and planted stands of Pine year 1995 on square 48I RPH East Hanjawar BKPH North Sukanagara in KPH Cianjur, Perum Perhutani Unit III West Java and Banten. The tools used in this study include scales, digital scales, ovens, machete, newsprint, chalk, plastic bags, plastic rope, stationery, tally sheets, calculator, tape measure, camera, and software SAS. In the area of stands are made each 5 plots with a size of 20 m x 20 m to measure the trees and also made small plots measuring 2 m x 2 m by 4 pieces located at each corner for analysis and retrieval of vegetation and litter. Results obtained from these data are processed through the approach of biomass which is then converted to carbon savings in ton/ha. To know the factors that influence the use of carbon deposits by using ANOVA analysis and Duncan Multiple Range Test (DMRT). The results showed that the potential of carbon storage on plots planted in 1995 is 77,1580 ton/ha greater than the potential carbon storage on plots planted in 1994 which only amounted to 64,6372 ton/ha. The test results using ANOVA statistical analysis showed the value of R-Sq = 96,01% and significant level 5%, there is a difference between the carbon potential on one of the object variabel (tree, manure, below plant) which is found on the stands of pine planted in 1994 and stands pine planting in 1995, where the variable is a tree. There needs to be further research on the estimation of carbon stock potential using a different method of harvesting method with the same kind of pine stands.
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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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