دورية أكاديمية
Statistical Comparison of IMERG Precipitation Products with Optical Rain Gauge Observations over Kototabang, Indonesia
| العنوان: | Statistical Comparison of IMERG Precipitation Products with Optical Rain Gauge Observations over Kototabang, Indonesia |
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| المؤلفون: | Helmi Yusnaini, Ravidho Ramadhan, Marzuki Marzuki, Ayu Putri Ningsih, Hiroyuki Hashiguchi, Toyoshi Shimomai, Mutya Vonnisa, Harmadi Harmadi, Wiwit Suryanto, Sholihun Sholihun |
| المصدر: | JIF (Jurnal Ilmu Fisika), Vol 14, Iss 1 (2021) |
| بيانات النشر: | Jurusan Fisika, FMIPA Universitas Andalas, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Physics |
| مصطلحات موضوعية: | Physics, QC1-999 |
| الوصف: | Satellite-based precipitation estimates play a crucial role in many hydrological and numerical weather models, especially to overcome the scarcity of rain gauge data. Globally gridded rainfall product from Integrated Multi-Satellite Retrievals for Global Precipitation Measurement (GPM) (IMERG) has been used in a wide range of hydrological applications. However, the IMERG is inherently prone to errors and biases. This study evaluated the performance of the IMERG-Final run (IMERG-F) product to estimate rainfall in a mountainous area of Sumatra. Validation was carried out using optical rain gauge (ORG) data for 15 years (2002-2016), at Kototabang, West Sumatra, Indonesia. In general, IMERG-F overestimated rainfall in all time scales. The longer the time scale was, the better the performance of IMERG-F we obtained. This feature was indicated by all quantities of continuous and categorical statistical matrices used. The performance of IMERG-F was lower than in other areas of the Maritime Continent, except for the probability of detection (POD) value. IMERG-F could detect rain very well, including for daily and hourly data, but the false alarm rate (FAR) was also relatively high. Such high FAR value may indicate a significant small-scale spatial rainfall variability in mountainous area of Sumatra. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English Indonesian |
| تدمد: | 1979-4657 2614-7386 |
| Relation: | http://jif.fmipa.unand.ac.id/index.php/jif/article/view/450; https://doaj.org/toc/1979-4657; https://doaj.org/toc/2614-7386 |
| DOI: | 10.25077/jif.14.1.10-20.2022 |
| URL الوصول: | https://doaj.org/article/99edd0e74c5948bfaee81dd3677e8532 |
| رقم الأكسشن: | edsdoj.99edd0e74c5948bfaee81dd3677e8532 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 19794657 26147386 |
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| DOI: | 10.25077/jif.14.1.10-20.2022 |