Classification of Precipitation Types Detected in Malaysia

Badron, Khairayu; Ismail, Ahmad Fadzil; Asnawi, Ani Liza; Nordin, Mimi Aminah Wan; Alam, Ahm Zahirul; Khan, Sheroz

doi:10.1007/978-3-319-17269-9_2

Cited by 6 publications

(4 citation statements)

References 14 publications

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“…Convective rain clouds can be characterised as rain clouds that rise extremely high and have large enough water droplets to produce rainfall of more than 10 mm/h [78]. Convective rain occurs in limited periods and usually covers a small area or is localised [79,80]. This rain pattern generally leads to high levels of rainfall [81].…”

Section: Application Of the Gradient Boosting Modelsmentioning

confidence: 99%

Rainfall Estimation Model in Seasonal Zone and Non-Seasonal Zone Regions Using Weather Radar Imagery Based on a Gradient Boosting Algorithm

Putra,

Rosid,

Handoko

2024

Atmosphere

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Indonesia, a country located in the equatorial region with hilly and valley lands surrounded by vast oceans, has complex rainfall patterns that can generally be classified into three types: equatorial, monsoon, and local. Rainfall estimates have only been derived based on local data and characteristics so far, and have not yet been developed based on universal data for all of Indonesia. This study aimed to develop a rainfall estimation model based on weather radar data throughout Indonesia using ensemble machine learning with the gradient boosting algorithm. The proposed rainfall estimation model is universal, can be applied to different rainfall pattern areas, and has a temporal resolution of 10 min. It is based on determining the root mean square error (RMSE) and R-squared (R2) values. Research was conducted in six areas with different rainfall patterns: Bandar Lampung and Banjarmasin with monsoon rain patterns, Pontianak and Deli Serdang with equatorial rain patterns, and the Gorontalo and Biak areas with local rain patterns. The analysis of the proposed model reveals that the best hyperparameters for the learning rate, maximum depth, and number of trees are 0.7, 3, and 50, respectively. The results demonstrate that the estimated rainfall in the six areas was very accurate, with RMSE < 2 mm/h and R2 > 0.7.

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Section: Application Of the Gradient Boosting Modelsmentioning

confidence: 99%

Rainfall Estimation Model in Seasonal Zone and Non-Seasonal Zone Regions Using Weather Radar Imagery Based on a Gradient Boosting Algorithm

Putra,

Rosid,

Handoko

2024

Atmosphere

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“…Thus, proper discrimination on the rain events would definitely enhance the prediction model of rain attenuation. There are several classification techniques to discriminate the stratiform and convective rain available in the literatures [9]- [11]. The most direct method is by using different rain rate thresholds.…”

Section: Stratiform Convective-synthetic Storm Technique (Sc-sst)mentioning

confidence: 99%

Slant Path Ka-Band rain attenuation statistics in equatorial Malaysia obtained using stratiform convective-synthetic storm technique

Yunus¹,

Din²,

Jong³

et al. 2018

IJET

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In the design of satellite communication link, rain attenuation statistics is essential information for system designer to realistically determine link availability and provide means to combat system degradation. Due to the limitation of available measured data in equatorial regions especially for high frequencies (Ka-band and above), the prediction model is the best way to obtain rain attenuation statistics. This paper presents statistical analysis of rain attenuation at Ka-band by applying the Stratiform Convective-Synthetic Storm Technique (SC-SST) model taking advantage from local weather features from rain rate time series. The study on seasonal and diurnal variability is also presented in this paper to provide good insight in the design and implementation of fade margin.

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“…Dari kedua jenis awan ini, maka hujan yang dihasilkan pun secara umum terbagi atas 2 jenis, yaitu hujan konvektif dan hujan stratiform. Badron et al (2015), yang melakukan klasifikasi jenis hujan yang terdeteksi di Malaysia menggunakan radar cuaca, menyebutkan bahwa jenis hujan konvektif biasanya melibatkan suatu presipitasi yang intens dengan waktu yang relatif singkat dan ketinggian hujan yang bervariasi yang mungkin naik hingga lebih dari 13 km. Lebih lanjut Badron et al (2015) memaparkan bahwa hujan konvektif dicirikan dengan curah hujan yang lebat yang terjadi dalam periode yang terbatas dan biasanya mencakup wilayah yang kecil atau terlokalisir, sedangkan hujan stratiform dicirikan dengan kejadian hujan ringan atau sedang yang terjadi dalam jangka waktu yang lebih lama.…”

Section: Klasifikasi Kejadian Hujanunclassified

KARAKTERISTIK HUJAN DAN AWAN PENGHASIL CURAH HUJAN HARIAN TINGGI BERDASARKAN DATA MICRO RAIN RADAR (Studi Kasus : Wilayah Dramaga, Bogor)

Syafira

Syaifullah

Renggono

2016

JSTMC

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IntisariKejadian hujan di wilayah Bogor yang seringkali dikaitkan dengan kejadian banjir di wilayah Jakarta dan sekitarnya menjadi dasar pentingnya studi karakterisasi awan-awan penghasil curah hujan harian tinggi di wilayah Bogor tersebut. Suatu instrumen cuaca, yaitu micro rain radar (MRR), merupakan instrumen yang cukup potensial dalam hal ini, tetapi belum banyak dimanfaatkan di daerah tropis, khususnya Indonesia. Dalam penelitian ini, dilakukan karakterisasi hujan dan awan-awan penghasil curah hujan harian tinggi di wilayah Dramaga, Bogor berdasarkan data MRR. Hasil analisis terhadap data MRR ini dengan cukup jelas memperlihatkan bahwa kejadian hujan dengan akumulasi curah hujan harian tinggi di daerah tersebut utamanya dihasilkan oleh awan-awan konvektif yang mencapai ketinggian puncak awan sekitar 4.5 km, dengan kejadian hujan berkisar pada siang, sore, dan malam hari. AbstractRain events in Bogor area that are often associated with flood occurrences in Jakarta and surrounding areas become important basic of characterization studies of clouds producing high daily rainfall in the Bogor area. A weather instrument, namely micro rain radar (MRR), is an instrument that is considerable potential in this regard, but has not been widely used in tropics, especially Indonesia. In this study, characterization of rain and clouds producing high daily rainfall in Dramaga, Bogor based on MRR data were conducted. Analysis results of the MRR data quite clearly show that occurrences of rain with high daily rainfall accumulation in the area were mainly produced by convective clouds which reached a height of cloud tops about 4.5 km, with rain events happened generally at afternoon, evening, and night.

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Classification of Precipitation Types Detected in Malaysia

Abstract: The occurrences of precipitation, also commonly known as rain, in the form of "convective" and "stratiform" have been

Cited by 6 publications

References 14 publications

Rainfall Estimation Model in Seasonal Zone and Non-Seasonal Zone Regions Using Weather Radar Imagery Based on a Gradient Boosting Algorithm

Rainfall Estimation Model in Seasonal Zone and Non-Seasonal Zone Regions Using Weather Radar Imagery Based on a Gradient Boosting Algorithm

Slant Path Ka-Band rain attenuation statistics in equatorial Malaysia obtained using stratiform convective-synthetic storm technique

KARAKTERISTIK HUJAN DAN AWAN PENGHASIL CURAH HUJAN HARIAN TINGGI BERDASARKAN DATA MICRO RAIN RADAR (Studi Kasus : Wilayah Dramaga, Bogor)

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