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INDONESIA
JURNAL METEOROLOGI DAN GEOFISIKA
Published by Badan Meteorologi, Klimatologi, dan Geofisika
ISSN : 14113082     EISSN : 25275372     DOI : https://www.doi.org/10.31172/jmg
Core Subject : Science,
Earth & Planetary Sciences Energy Physics
Jurnal Meteorologi dan Geofisika (JMG) is a scientific research journal published by the Research and Development Center of the Meteorology, Climatology and Geophysics Agency (BMKG) as a means to publish research and development achievements in Meteorology, Climatology, Air Quality and Geophysics.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Ilmu Bumi dan Planet (Lain-Lain)
Articles 310 Documents
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Abstrak JMG JMG BMKG
Jurnal Meteorologi dan Geofisika Vol 13, No 3 (2012)
Publisher : Pusat Penelitian dan Pengembangan BMKG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (45.831 KB)

Abstract

Abstrak Jurnal Meteorologi dan Geofisika Volume 13 No 3 Tahun 2012
ANALISIS KONDISI UDARA ATAS WILAYAH INDONESIA DENGAN DATA RADIOSONDE M. Djazim Syaifullah
Jurnal Meteorologi dan Geofisika Vol 18, No 1 (2017)
Publisher : Pusat Penelitian dan Pengembangan BMKG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (12227.306 KB) | DOI: 10.31172/jmg.v18i1.268

Abstract

Analisis kondisi udara atas wilayah Indonesia telah dilakukan dengan data rawindsonde. Sebanyak sebelas stasiun peluncuran rawindsonde di wilayah Indonesia, Malaysia dan Singapura digunakan dalam penelitian ini dengan panjang data selama lima tahun. Ada beberapa informasi penting telah didapatkan, yaitu tentang profil suhu dan penurunan suhu (lapse rate), lapisan tropopause, profil komponen angin zonal, dan beberapa nilai indeks rawindsonde. Lapse rate rerata dari permukaan sampai ketinggian lapisan tropopause adalah sekitar -0.62oC/100meter, sedangkan lapse rate rerata dari permukaan sampai paras freezing level sekitar -0.55oC/100meter. Untuk lapisan di atas freezing level mempunyai tingkat labilitas yang lebih tinggi dibandingkan pada lapisan di bawah freezing level. Lapisan tropopause secara rerata berada pada ketinggian 16.6 kilometer dengan suhu sekitar -81oC. Dari pengamatan rawindsonde menunjukkan nilai ketinggian lapisan tropopause yang relatif hampir sama. Profil angin komponen zonal untuk beberapa stasiun pengamatan menunjukkan adanya periodisitas pada lapisan bawah (di bawah 5 kilometer atau sekitar 15 ribu feet) yaitu pada musim hujan dominan komponen angin baratan sedang pada musim kering dominan angin timuran. Dari nilai-nilai indeks rawindsonde di wilayah Indonesia secara rerata dalam kisaran weak dan moderate. Secara umum juga terlihat bahwa semakin dekat dengan ekuator (lintang kecil) maka nilai CAPE cenderung lebih besar dibandingkan dengan daerah yang lebih jauh dari ekuator. Perlu dilakukan kajian dan analisis lebih lanjut terutama komponen angin zonal pada lapisan atas untuk lebih memahami pola sirkulasi udara atas wilayah Indonesia.Analysis of upper-air conditions over Indonesia has been done using the radiosondes data. A total of eleven radiosonde stations launched in Indonesia, Malaysia, and Singapore have been used in this study The length of the data used in this study is five years. There was some important information has been collected, which are the temperature profile, lapse rate, the tropopause layer, the profile of the zonal wind component, and some radiosonde indexes. The average lapse rate from the o surface to the tropopause layer is about -0.62 C/100m, while the average lapse rate of the surface to the freezing level is o around -0.55 C/100m. Especially for a layer above freezing level lability has a higher level than in the layer below the freezing level. The average height of the tropopause layer is about 16.6 kilometers above ground level with o temperatures of -81 C. Zonal wind component profiles for several observation stations showed periodicity in the lower layers (below 15 thousand feet). During rainy season is dominantly westerlies, while for the dry season is dominantly easterlies. From radiosonde indexes in the study was found that average values in the range of weak to moderate. It is necessary to study and do further analysis especially for zonal wind components on the top layer of the atmosphere to have a better understanding especially in patterns of air circulation over the Indonesia region.
Sampul Jurnal MG JMG BMKG
Jurnal Meteorologi dan Geofisika Vol 11, No 1 (2010)
Publisher : Pusat Penelitian dan Pengembangan BMKG

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Abstract

Sampul Jurnal Meteorologi dan Geofisika
KARAKTERISTIK LAPISAN TANAH BERPOTENSI LIKUIFAKSI BERDASARKAN RESISTIVITAS BATUAN DI DAERAH CILACAP Thomas Hardy; Boko Nurdiyanto; Drajat Ngadmanto; Pupung Susilanto
Jurnal Meteorologi dan Geofisika Vol 16, No 1 (2015)
Publisher : Pusat Penelitian dan Pengembangan BMKG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16243.499 KB) | DOI: 10.31172/jmg.v16i1.262

Abstract

Salah satu metode geofisika yang dapat mengetahui profil penampang bawah permukaan untuk mengetahui potensi likuifaksi adalah metode resistivitas geolistrik. Penelitian ini bertujuan untuk mengetahui gambaran resistivitas lapisan tanah yang memiliki potensi likuifaksi di daerah Cilacap. Penelitian ini menggunakan 33 titik pengukuran resistivitas geolistrik dimana hasil analisis resistivitas ditampilkan dalam bentuk penampang melintang lapisan bawah permukaan. Analisis potensi likuifaksi berdasarkan resistivitas batuan dilakukan dengan mempertimbangkan informasi tingkat kepadatan relatif dan uji kekuatan (N-SPT) serta karakteristik batuan lepas. Nilai resistivitas di daerah penelitian berkisar antara 0.09 – 585Wm. Berdasarkan informasi geologi maka nilai resistivitas yang terukur di daerah penelitian menunjukkan litologi aluvium berupa pasir, kerikil dan kerakal (100 – 585 Wm), aluvium berupa lempung dan lanau (14 – 85 Wm), akuifer air (1.6 – 15 Wm), lapisan lempung (0.09 – 1.5 Wm), napal tufaan (6 – 95 Wm) serta pasir tufaan sisipan batupasir (1.3 – 8 Wm), yang merupakan satuan batuan dari Formasi Halang. Daerah Cilacap mempunyai potensi likufaksi yang relatif tinggi dikarenakan memiliki karakteristik fisik yang tersusun oleh endapan Kuarter dengan tingkat kepadatan dan sifat keteknikan tanah bawah permukaan dicirikan material sangat lepas hingga agak padat, memiliki muka air tanah yang dangkal, secara fisiografi berhadapan langsung dengan laut yang menyebabkan sedimen penyusunnya jenuh air, dan berada di lokasi yang rawan gempabumi besar. One of the geophysical methods to determine subsurface cross-section profiles to determine the liquefaction potential is the geoelectric resistivity method. This study aims to describe the resistivity layer of soil liquefaction potential in Cilacap. This study uses 33 measurement points where the geoelectric resistivity analysis results are displayed in the subsurface cross-section profile. Analysis of liquefaction potency based on the resistivity of rock performed by considering relative density level information and strength test (N-SPT) and unconsolidated rock characteristics. Resistivity value in the study area ranged from 0.09 - 585 Wm. Based on geological information, the resistivity values measured in research area show lithology of alluvium i.e. sand, granule and pebble (100-585 Wm), alluvium i.e. clay and silt (14-85 Wm), aquifers (1.6 - 15 Wm), layer of clay (0.09 - 1.5 Wm), tuffaceous marl (6-95 Wm), inserted tuffaceous sandstone (1.3 - 8 Wm), all of which are Halang formation lithology. Cilacap area has the relative high liquefaction potential due to the physical characteristics composed by Quaternary sediment with density and subsurface soil engineering that very loose until rather dense, has a shallow groundwater-surface, in the physiographic located near the coast which water-saturated sediments constituent, and located in a great earthquake-prone location.
The Utilization of Weather Research Forecasting (WRF) Model of 3DVar (Three Dimensional Variational) and Himawari-8 Satellite Imagery to the Heavy Rain in Palangkaraya (Case Study : April 27, 2018) Nadine Ayasha; Leny Octaviana Bota
Jurnal Meteorologi dan Geofisika Vol 23, No 3 (2022): Special Issue
Publisher : Pusat Penelitian dan Pengembangan BMKG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (495.734 KB) | DOI: 10.31172/jmg.v23i3.790

Abstract

On April 27, 2018 heavy rain was occurred in Palangkaraya. Based on surface data observations at Tjilik Riwut Meteorological Station, the peak of rain occurred between 18-21 UTC, which 54 mm within 3 hours. As a result, the flood inundated on the following day. This research purposed to discover the cause of heavy rain used the WRF model of 3DVar technique that assimilated with AMSU-A satellite which used the tropical physic suite parameterization scheme and Himawari-8 Satellite (IR-1 data), processed by Python Programming. Based on the results, the WRF of the 3DVar model is not representative enough in total rainfall results. However, several weather disturbances show the potency for severe weather occurrence from WRF 3DVar modeling. These are indicated by the shear line and eddy circulation at 18 and 21 UTC, and the time series of air pressure decreases with a 0.5 Mb tendency between 15 to 18 UTC. Moreover, the cloud top temperature graph from Himawari-8 Satellite data shows a drastic reduction in temperature to -61.4323 at 18.20 UTC, which supports the heavy rain process. The weather analysis above show that WRF 3DVar is not representative enough for total rainfall result, but appropriate for other weather aspects (shear line, eddy, and air pressure). Therefore, the heavy rain is caused by shear line and eddy condition, air pressure and low temperature of the cloud top.
ANALISIS CURAH HUJAN PANTAI BARAT SUMATERA BAGIAN UTARA PERIODE 1994-2007 Indra Gustari
Jurnal Meteorologi dan Geofisika Vol 10, No 1 (2009)
Publisher : Pusat Penelitian dan Pengembangan BMKG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (682.146 KB) | DOI: 10.31172/jmg.v10i1.31

Abstract

Dari data curah hujan di pantai barat Sumatera bagian utara dilakukan analisis spektrum daya untuk mengetahui pola curah hujan di daerah tersebut, selanjut dilihat hubungannya dengan intensitas monsun,  Indian Ocean Dipole Mode (IODM) dan El-Nino Southern Oscillation (ENSO). Hasil analisis menunjukkan bahwa pola curah hujan di pantai barat Sumatera bagian utara memiliki dua puncak dan sangat dipengaruhi oleh faktor cuaca dengan dengan osilasi satu tahunan (annual oscillation), dan setengah tahunan (semi-annual oscillation) dan ditemukan hubungan yang kuat antara variabilitas monsun dan IODM. Pola hujan didaerah ini tidak memperlihatkan pengaruh ENSO. The data of Rainfall in the west coast of northern Sumatera were analyzed through power spectrum analyzer to find out the rainfall pattern in that area and to look at the relationship between rainfall pattern and monsoon intensity, Indian Ocean Dipole Mode (IODM) and El-Nino Southern Oscillation (ENSO). The result of this analysis shows that the main rainfall pattern in the west coast of northern Sumatera has two peaks and is very much influenced by the factor of weather with annual oscillation and semi-annual oscillation, there is a strong relationship between monsoon variability and IODM, and the influence of ENSO on the rainfall in this region is not significant.
Sampul Jurnal MG JMG BMKG
Jurnal Meteorologi dan Geofisika Vol 14, No 3 (2013)
Publisher : Pusat Penelitian dan Pengembangan BMKG

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Abstract

Sampul dan Pengantar Jurnal MG Volume 14 No 3 Tahun 2013
INDEKS PENULIS DAN INDEKS SUBYEK VOL. 20 INDEKS PENULIS INDEKS SUBYEK
Jurnal Meteorologi dan Geofisika Vol 20, No 2 (2019)
Publisher : Pusat Penelitian dan Pengembangan BMKG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (30.993 KB) | DOI: 10.31172/jmg.v20i2.684

Abstract

INDEKS PENULIS DAN INDEKS SUBYEK VOL. 20
Sampul Jurnal MG JMG BMKG
Jurnal Meteorologi dan Geofisika Vol 13, No 2 (2012)
Publisher : Pusat Penelitian dan Pengembangan BMKG

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Abstract

Sampul Jurnal Volume 13 No 2 Tahun 2012
Sampul Jurnal MG JMG BMKG
Jurnal Meteorologi dan Geofisika Vol 18, No 2 (2017)
Publisher : Pusat Penelitian dan Pengembangan BMKG

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Abstract

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