Judul: Application of regCM3 output for drought analysis in Seluna Sub Basin
Abstrak: Assessment of drought characteristics requires long historical climate data. In many cases, long historical data is hardly available. Climate dynamic model is very potential to be used for reconstructing long historical climate data. This study aims to reconstruct daily climate data using climate model RegCM3 and to assess the characteristic of drought occurrence in rice paddy using the reconstructed data from the climate model. The drought analysis was done using water balance model. The result of the analysis suggests that the development of correction factor for RegCM3 is required before the reconstructed data is used for drought analysis. The pattern of drought generated using the reconstructed data is similar to that of the observed ones. The result of analysis indicates that the rice start suffering from drought when the soil water has dropped below 30% of field capacity and this condition occurs mostly during August to October. This study recommends the use of RegCM3 output for climate impact analysis in areas where daily climate data is limited or not available.
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Judul: Pemanfaatan luaran RegCM3 untuk kajian dampak perubahan iklim terhadap perubahan waktu dan pola tanam padi di Jawa Barat
Abstrak: Climate change could be indicated by the shifting in the patterns of climate variables, such as air temperature and rainfall in the long term. The changes of those two variables could affect water balance, which will impact agricultural management systems, especially related to planting time and cropping patterns. This research aims to study future climate change projections and their impact on the changing of planting time and cropping patterns in West Java. The analysis is based on the Thornhtwaite Mather water balance model calculated by using climate data from the output of regional climate model, namely RegCM3. The RegCM3 output shows a rainfall decrease in West Java ranging from 4.53% to 8.16%. The changes of rainfall pattern in the future are projected to increase during wet seasons and will decrease during transitional and dry seasons, with shorter rainfall peak of wet seasons and longer peak of dry seasons. The temperature in West Java is also projected to change in the future showed by a very significant increase compared to the reference period. Based on the observational data, the temperature trends in the region has showed an increase, ranging from 0.0174 °C/year to 0.0216 °C/year during 1985-1999 periods. Water balance are analyzed on three different areas in West Java based on the rainfall patterns defined by cluster analysis (cluster C1, C2, and C3). C1 rainfall pattern is a region with low rainfall, C2 with medium rainfall, and C3 with high rainfall. Based on the calculation of water balance in the future under SRES A1B scenario, it is shown that the planting time will be potentially delayed from 40 to 51 days especially in C1 and C2 regions, while there is no change of planting time in C3 region. In addition, the cropping pattern will also change in the future due to the change in water balance. Initial determination of growing season will experience a setback, which ranges from one to two of ten days period in C1 and C2 region with cropping patterns changing from paddy-paddy-fallow to paddy-fallow-fallow in C2 region.
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Judul: Trichomonas Gallinae Penyebab Trichomonosis Pada Unggas
Abstrak: Trichomonas gallinae adalah protozoa yang bergerak aktof dengan keempat flagella yang mempunyai layar dan pada salah satu sisinya terdapat membran seperti sirip ikan yang berombak. Spesies dari genus Trichomonas ini mempunyai arti penting pada unggas, karena dapat menyebabkan infeksi pada alat pencernaan bagian atas.
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