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All Journal Berkala Perikanan Terubuk Jurnal Penelitian Sains Jurnal Meteorologi Klimatologi dan Geofisika J Statistika: Jurnal Ilmiah Teori dan Aplikasi Statistika Proceedings of International Conference on Multidiciplinary Research
Yosafat Donni Haryanto
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Agriculture, Biological Sciences & Forestry Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Mathematics Physics Social Sciences

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ANALISIS PENGARUH MADDEN JULIAN OSCILLATION TERHADAP PROPAGASI DAN DISTRIBUSI TEMPORAL HUJAN BERDASARKAN PENGAMATAN CITRA SATELIT DI WILAYAH BENGKULU TAHUN 2018 Rizky Umul Nisa Fadillah; Yosafat Donni Haryanto; Nelly Florida Riama
Jurnal Meteorologi Klimatologi dan Geofisika Vol 7 No 1 (2020): Jurnal Meteorologi Klimatologi dan Geofisika
Publisher : Unit Penelitian dan Pengabdian Masyarakat Sekolah Tinggi Meteorologi Klimatologi dan Geofisika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36754/jmkg.v7i1.211

Abstract

Madden Julian Oscillation (MJO) is a phase that produces variations in several parameters of the atmosphere and oceans which is indicated by the increase of rainfall in the area it passes through. Bengkulu region is the closest area to the initial area of the formation of the MJO. This study aims to determine the value of the connectivity as well as the propagation and temporal distribution of rain in the Bengkulu region during the active MJO period in phase 3 to phase 5 based on satellite imagery observations as well as the increase and decrease in rainfall in the Bengkulu region. Based on the descriptive analysis, it shows a weak convective state at 00 UTC and a strong convective at 12 UTC accompanied by rainfall propagation which is seen in phase 3 moving from west to east with changes in rainfall intensity at each active MJO phase from the Fatmawati Class III Meteorological Station Bengkulu, Bengkulu Class I Climatology Station and Kepahiang Bengkulu Class III Geophysical Station. From the observed phase period, the rainfall propagation pattern was seen in phase 3 and was followed by an increase in rainfall intensity, while in phases 4 and 5 there was a decrease in rainfall intensity that occurred in the Bengkulu region. MJO also has an effect on the increase in rainfall in the land area and waters of Bengkulu in phase 3 and phase 4. In phase 5 the decrease in rainfall occurs in the mainland area of ​​Bengkulu while the increase in rainfall occurs in Bengkulu waters
Pemanfaatan Satelit Himawari-8 Untuk Estimasi Curah Hujan Dengan Metode Convective Stratiform Technique (CST) Dan Modified Convective Stratiform Technique (Mcst) Di Wilayah Ekuatorial Dan Monsunal (Studi Kasus Sulawesi 2020): Pemanfaatan Satelit Himawari-8 Untuk Estimasi Curah Hujan Dengan Metode Convective Stratiform Technique (CST) Dan Modified Convective Stratiform Technique (Mcst) Di Wilayah Ekuatorial Dan Monsunal (Studi Kasus Sulawesi 2020) Muzaki, Nur Habib; Eriska Febriati; Yosafat Donni Haryanto
J STATISTIKA: Jurnal Imiah Teori dan Aplikasi Statistika Vol 14 No 2 (2021): Jurnal Ilmiah Teori dan Aplikasi Statistika
Publisher : Fakultas Sains dan Teknologi Univ. PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (405.827 KB) | DOI: 10.36456/jstat.vol14.no2.a3860

Abstract

Curah hujan merupakan salah satu parameter cuaca yang sangat penting bagi kehidupan. Informasi data curah hujan mampu menunjukan pola tipe curah hujan si suatu wilayah. Kurangnya rapat persebaran alat pengamatan curah hujan menyebabkan cakupan wilayah menjadi sempit. Oleh karena itu, pemanfaatan metode estimasi curah hujan dengan menggunakan data satelit merupakan salah satu solusi untuk mendapatkan data curah hujan di wilayah yang tidak memiliki alat pengamatan curah hujan. Dalam penelitian ini, estimasi curah menggunakan data satelit Himawari-8 dengan menggunakan metode Convective Startiform Technique (CST) dan Modified Convective Startiform Technique (mCST). Metode CST meruapakan metode yang memisahkan komponen awan konvektif dan stratiform, sedangkan metode mCST merupakan metode modifikasi intensitas curah hujan serta luasan area rata-rata yang dilingkupi piksel terhadap metode CST. Penelitian ini dilakukan di wilayah tipe hujan ekuatorial yang diwakili oleh Kabupaten Luwu Utara dan wilayah tipe hujan monsunal yang diwakili oleh Kota Makassar. Penelitian ini dilakukan selama satu tahu dengan mengambil sampel bulan puncak curah hujan di kedua wilayah. Tujuan penelitian ini adalah untuk membandingkan kualitas hasil estimasi curah hujan dengan menggunakan metode CST dan metode mCST Berdasarkan hasil estimasi curah hujan, metode CST menghasilkan nilai yang lebih baik dibandingkan dengan metode mCST di kedua wilayah yang ditandai dengan nilai korelasi yang lebih baik. Nilai eror RMSE berkisar 33.80 mm/jam hingga 42.66 mm/jam dan Nilai MAE berkisar 26.30 mm/jam hingga 34.55 mm/jam. Berdasarkan penelitian ini, kedua metode estimasi curah hujan ini, kurang mampu mempresentasikan data curah hujan di kedua wilayah.
ANALISIS MONSUN DI LAUT JAWA Yosafat Donni Haryanto; Rezfiko Agdialta; Agus Hartoko
Berkala Perikanan Terubuk Vol 48, No 2 (2020): Juli 2020
Publisher : Fakultas Perikanan dan Kelautan, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/terubuk.48.2.492-500

Abstract

Monsoon is one of the important atmospheric circulations of the global climate system, monsoon activity has a major influence on weather formation in the region in its path. Monsoon activity is often associated with the presence of synoptic disorders in the area in its path. Synoptic disorders involving the movement of rain slowed throughout the monsoon region. The monsoon pits on an annual cycle related to climate when dry and wet. During the dry season, winters occur on various continents with a mass of air in the atmosphere which results in cold and dry, while when it is wet, it affects the summer with moist air. The Java Sea is an area of 310,000 Km2 which is located only 220 miles from the island of Borneo and the north coast of Java covers the archipelago. The geographical position of the Java Sea is in the area where the interaction is occurring - the atmosphere in the Java Sea is becoming more dynamic. Research Objectives to analyze the influence of rainfall in the Java Sea spatially and temporally. The data used are wind re-analysis of zone and meridional data (ftp.cdc.noaa.gov/ Data set /) from 1986 to 2017, for rainfall data at Tegal, Semarang and Surabaya Meteorological Stations 1986-2017. Spatial and temporal monsoon wind patterns are more dominant and beneficial to the variability of rainfall in the Java Sea. This condition can be seen in the type of monsoonal rain letter U or V with one peak of rain in December January and February (DJF) with the beginning of the rainy season in December in June July August (JJA) peak of the dry season and dry season beginning in June.
Analisis kondisi cuaca saat terjadi Siklon Tropis Paddy di wilayah Pulau Jawa (studi kasus: 22-24 November 2021) Naufal Dhiya Ulhaq; Yosafat Donni Haryanto
Jurnal Penelitian Sains Vol 24, No 1 (2022)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (754.135 KB) | DOI: 10.56064/jps.v24i1.676

Abstract

Kejadian Siklon Tropis Paddy terjadi pada tanggal 22-24 November 2021 yang terjadi di Perairan Selatan Jawa yang mengakibatkan perubahan kondisi cuaca di sekitar wilayah Perairan Selatan Jawa Khususnya Pulau Jawa. Perubahan kondisi cuaca tersebut dapat megakibatkan terjadi hujan lebat, angin kencang, dan kondis cuaca lain pada wilayah Pulau Jawa. Maka, dilakukan pengamatan kondisi cuaca dari adanya Siklon Tropis Paddy untuk mengetahui dampak kondisi cuaca pada wilayah Pulau Jawa. Pengamatan satelit Himawari-8 yang hasilnya terdapat awan konvektif pada waktu 22-24 November 2021 yang mengakibatkan perubahan kondisi cuaca. Pengamatan dengan data ECMWF menghasilkan perubahan angin, suhu permukaan , tekanan permukaan , dan total presipitasi pada wilayah Pulau Jawa.Maka, dapat dilakukan pengamatan analisis kondisi cauca di wilayah Pulau Jawa
Pemanfaatan Data Satelit Cuaca Himawari-8 dan Radiosonde Dalam Analisis Hujan Lebat (Studi Kasus: Cilacap, 13 Januari 2021) Naufal Dhiya Ulhaq; Yosafat Donni Haryanto
Jurnal Penelitian Sains Vol 24, No 2 (2022)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1086.464 KB) | DOI: 10.56064/jps.v24i2.671

Abstract

Kejadian hujan lebat terjadi di daerah Cilacap,  Tanggal 13 Januari 2021 menimbulkan banjir dan tanah longsor di beberapa titik di daerah Cilacap. Maka diperlukan  analisis meteorologis untuk mengetahui penyebab kejadian. Pada penelitian ini memanfaatkan data satelit cuaca himawari-8 dengan  metode RGB, CCO dan SWA dengan waktu malam serta menggunakan metode pengamatan udara atas dengan radiosonde dengan waktu 00 UTC daerah Cilacap dan data curah hujan dari BMKG Cilacap yang menujukkan probabilistik curah hujan tiap jam dengan kategori hujan ringan sampai hujan sangat lebat semakin malam di Daerah Cilacap. Penggunaan metode bisa efektif mengetahui keadaan atmosfer di daerah Cilacap. Hasil pengamatan dari metode RGB terjadi kondisi awan berakibat hujan lebat yang tinggi. Hasil pengamatan metode CCO terjadi awan - awan konvektif yang terjadi hujan lebat dengan intensitas tinggi. Hasil pengamatan dengan SWA terdapat tipe awan High Cumulonimbus, Dense Cirrus, dan Thick Cirrus yang dapat terjadi hujan lebat yang tinggi. Hasil pengamatan pengamatan udara atas dengan radiosonde pada 00 UTC menunjukkan awal fase cuaca buruk di wilayah Cilacap.
Visualization of Aerological Diagram and Analysis of Atmospheric Sounding Information Using Raob with Model Data During Low Visibility Conditions at Cengkareng Meteorological Station Bagus Primohadi Syahputra; Muhammad Yusuf; Yosafat Donni Haryanto; Nelly Florida
International Conference on Multidisciplinary Research Vol 5, No 2 (2022): ICMR
Publisher : Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/pic-mr.v5i2.5420

Abstract

The limitations of in-situ observations of the upper air are one of the obstacles in analyzing the weather. The use of data models can be one solution. The purpose of this study was to determine the accuracy of the data model in providing upper air information using RAOB as a visualization tool for aerological diagrams and sounding information analyzers. The data used are radiosonde observation data from the Cengkareng meteorological station and 1000 – 100 mb ECMWF pressure level models at the same location as the in-situ observations. The time chosen is when the haze and mist occur at the observation time 00 UTC for 5 events each. The method used is pearson correlation and simple visual verification. The results obtained that the correlation of the significant point plot data diagram when the mist occurs is 0.76 and when the haze occurs is 0.67 and visually as a whole show that the model data is quite close to the observation data. Correlation of 59 sounding information as a whole produces a value of 0.85 – 0.99 when the Mist occurs and a value of 0.89 – 0.99 when the Haze occurs. It is hoped that these results can be used as a consideration for the use of data models in filling in the gaps in radiosonde observation data. Keywords: Sounding Information, RAOB, Radiosonde, ECMWF Models
Co-Authors Agus Hartoko Bagus Primohadi Syahputra Eriska Febriati MUHAMMAD YUSUF Muzaki, Nur Habib Naufal Dhiya Ulhaq Naufal Dhiya Ulhaq Nelly Florida Nelly Florida Riama Rezfiko Agdialta Rizky Umul Nisa Fadillah