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Abstrak :
Untuk keperluan operasional, BMG menetapkan satuan waktu 10 hari yang disebut dasarian. Dasarian yang disusun BMG tidak selalu 10 hari, karena setiap bulan selalu habis dibagi menjadi 3 dasarian. Pada sekitar awal 1970 mulai dikembangkan data bumi yang diukur dari berbagai cara, terutama dari penginderaan jauh. Data seperti ini disebut reanalysis data, dua diantaranya suhu muka laut dan curah hujan. Data suhu muka laut dari penginderaan jauh sudah secara Internasional dinyatakan handal untuk berbagai keperluan, sedang data curah hujan dari penginderaan jauh dianggap dapat dipercaya ( reliable ) untuk keperluan penelitian, jika untuk operasional harus diverfikasi dengan data pengamatan. Data yang digunakan dalam penelitian ini adalah data reanalisis dari TRMM ( Tropical Rainfall Measurement Mission), yang diverifikasi dengan data pengamatan 12 lokasi di Jawa Timur, hasilnya data TRMM berkorelasi cukup kuat dengan data pengamatan. Dari hasil penelitian, curah hujan di Jawa Timurberkorelasi dengan suhu muka laut di perairan Indonesia dengan pola : berkorelasi positif dengan perairan sebelah timur - selatan Indonesia dan berkorelasi negatif dengan suhu muka laut perairan sebelah utara - barat Indonesia.

Abstrak :
[ABSTRAK
Pemahaman mengenai interaksi laut dan atmosfer merupakan kunci untuk menjelaskan fenomena iklim dan cuaca di benua maritim Indonesia. Dalam penelitian ini, akan dikaji hubungan antara energi radiasi gelombang panjang yang dipantulkan oleh bumi ke atmosfer, Outgoing Longwave Radiation (OLR), dengan suhu muka laut (SST). Sebagai ilustrasi, uap air (terutama awan), merupakan gas yang cukup efektif menyerap radiasi gelombang panjang. Namun jumlah uap air di atmosfer selalu berubah karena terjadi proses penguapan dan kondensasi secara terus-menerus, sementara sumber uap air utama adalah lautan. Data yang digunakan adalah OLR dan SST tahun 1979 hinggga 2011. Berdasarkan hasil analisis diketahui bahwa nilai koefisien korelasi di wilayah Indonesia menunjukkan ikatan hubungan yang sedang (r = 0,5). Sedangkan hasil pemetaan korelasi dan signifikansi menunjukkan bahwa hubungan OLR dan SST di wilayah Indonesia dipengaruhi oleh fenomena ENSO dan IODM.

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ABSTRACT
Ocean and atmosphere interactions are the key to explain the phenomenon of climate and weather in Indonesia. This study will be assessed the relationship between the energy of longwave radiation reflected by the earth into the atmosphere, Outgoing Longwave Radiation (OLR), and sea surface temperature (SST). As an illustration, water vapor (especially cloud), is an effective gas to absorb longwave radiation. But the amount of water vapor in the atmosphere is always changing due to evaporation and condensation processes continously, while the main source of water vapor is the ocean. The data used is OLR and SST in 1979 until 2011. Based on the analysis it is known that the value of the correlation coefficient in the region of Indonesia shows r = 0,5. While the results of the mapping correlation and significance shows that OLR and SST relationship in Indonesia affected by ENSO and IODM.;Ocean and atmosphere interactions are the key to explain the phenomenon of climate and weather in Indonesia. This study will be assessed the relationship between the energy of longwave radiation reflected by the earth into the atmosphere, Outgoing Longwave Radiation (OLR), and sea surface temperature (SST). As an illustration, water vapor (especially cloud), is an effective gas to absorb longwave radiation. But the amount of water vapor in the atmosphere is always changing due to evaporation and condensation processes continously, while the main source of water vapor is the ocean. The data used is OLR and SST in 1979 until 2011. Based on the analysis it is known that the value of the correlation coefficient in the region of Indonesia shows r = 0,5. While the results of the mapping correlation and significance shows that OLR and SST relationship in Indonesia affected by ENSO and IODM.;Ocean and atmosphere interactions are the key to explain the phenomenon of climate and weather in Indonesia. This study will be assessed the relationship between the energy of longwave radiation reflected by the earth into the atmosphere, Outgoing Longwave Radiation (OLR), and sea surface temperature (SST). As an illustration, water vapor (especially cloud), is an effective gas to absorb longwave radiation. But the amount of water vapor in the atmosphere is always changing due to evaporation and condensation processes continously, while the main source of water vapor is the ocean. The data used is OLR and SST in 1979 until 2011. Based on the analysis it is known that the value of the correlation coefficient in the region of Indonesia shows r = 0,5. While the results of the mapping correlation and significance shows that OLR and SST relationship in Indonesia affected by ENSO and IODM.;Ocean and atmosphere interactions are the key to explain the phenomenon of climate and weather in Indonesia. This study will be assessed the relationship between the energy of longwave radiation reflected by the earth into the atmosphere, Outgoing Longwave Radiation (OLR), and sea surface temperature (SST). As an illustration, water vapor (especially cloud), is an effective gas to absorb longwave radiation. But the amount of water vapor in the atmosphere is always changing due to evaporation and condensation processes continously, while the main source of water vapor is the ocean. The data used is OLR and SST in 1979 until 2011. Based on the analysis it is known that the value of the correlation coefficient in the region of Indonesia shows r = 0,5. While the results of the mapping correlation and significance shows that OLR and SST relationship in Indonesia affected by ENSO and IODM.;Ocean and atmosphere interactions are the key to explain the phenomenon of climate and weather in Indonesia. This study will be assessed the relationship between the energy of longwave radiation reflected by the earth into the atmosphere, Outgoing Longwave Radiation (OLR), and sea surface temperature (SST). As an illustration, water vapor (especially cloud), is an effective gas to absorb longwave radiation. But the amount of water vapor in the atmosphere is always changing due to evaporation and condensation processes continously, while the main source of water vapor is the ocean. The data used is OLR and SST in 1979 until 2011. Based on the analysis it is known that the value of the correlation coefficient in the region of Indonesia shows r = 0,5. While the results of the mapping correlation and significance shows that OLR and SST relationship in Indonesia affected by ENSO and IODM., Ocean and atmosphere interactions are the key to explain the phenomenon of climate and weather in Indonesia. This study will be assessed the relationship between the energy of longwave radiation reflected by the earth into the atmosphere, Outgoing Longwave Radiation (OLR), and sea surface temperature (SST). As an illustration, water vapor (especially cloud), is an effective gas to absorb longwave radiation. But the amount of water vapor in the atmosphere is always changing due to evaporation and condensation processes continously, while the main source of water vapor is the ocean. The data used is OLR and SST in 1979 until 2011. Based on the analysis it is known that the value of the correlation coefficient in the region of Indonesia shows r = 0,5. While the results of the mapping correlation and significance shows that OLR and SST relationship in Indonesia affected by ENSO and IODM.]

Abstrak :
Kondisi iklim tropis terutama curah hujan merupakan fenomena iklim yang sangat kompleks, yang dipengaruhi oleh faktor lokal, regional dan global. Penelitian ini mengkaji variabilitas curah hujan dan pergeseran musim di wilayah Banten sehubungan dengan adanya anomali suhu muka laut di Samudera Pasifik, Samudera Hindia dan perairan Indonesia. Variabilitas curah hujan dan pergeseran musim diolah dari data hujan harian dari 15 lokasi pos hujan selama periode tahun 1981-2010, sedangkan suhu muka laut diolah dari data hasil reanalisis JMA melalui analisis komparatif secara spasial dan temporal dengan tehnik overlay peta dan cross tab dihasilkan bahwa pada saat terjadi Elnino, DM+ dan INA- berakibat terhadap berkurangnya curah hujan di wilayah Banten yang mengindikasikan awal musim kemarau terjadi lebih cepat serta lebih panjang dibandingkan normalnya. Sedangkan sebaliknya kondisi Lanina, DM- dan INA+ berakibat terhadap bertambahnya curah hujan yang mengindikasian awal musim hujan terjadi lebih cepat serta lebih panjang dibandingkan normalnya.

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The climate tropics system especially rainfall is very complexs climate systems, its affected by local, regional and global factors. This research analyzing of rainfall and seasonal shift variability related with sea surface temperature anomaly over Pasific and Hindian Ocean and also Indonesian sea. Rainfall and seasonal shift analyzed from daily rainfall data derived from 15 location in the years of 1981 to 2010, while sea surface temperature data analyzed from JMA reanalysis through comparative spatial analysis distribution and temporal using map overlay and cross tab tehniques. The results are generally, the impact of Elnino, Dipole Mode Positive and cold is decreasing rainfall in Banten Province. Its indicates dry season occurred earlier and longer than normal condition. While Lanina, Dipole Mode Negative and warm over Indonesian sea indicates to increasing rainfall and the rainy season earlier and longer than normal condition.