ACADSTAFF UGM
| Title | : | Statistical Comparison of IMERG Precipitation Products with Optical Rain Gauge Observations over Kototabang, Indonesia |
| Author | : |
Helmi Yusnaini (1) Ravidho Ramadhan (2) Marzuki (3) Ayu Putri Ningsih (4) Hiroyuki Hashiguchi (5) Toyoshi Shimomai (6) Mutya Vonnisa (7) Harmadi (8) Dr.rer.nat. Wiwit Suryanto, S.Si., M.Si. (9) Sholihun, S.Si., M.Sc., Ph.D.Sc. (10) |
| Date | : | 28 2021 |
| Keyword | : | IMERG-F,Optical rain gauge,GPM,Kototabang,Indonesia IMERG-F,Optical rain gauge,GPM,Kototabang,Indonesia |
| Abstract | : | 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 evaluatedthe 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 scalewas, the better the performance of IMERG-Fwe obtained. This feature was indicated by allquantities of continuous and categorical statistical matrices used. The performance of IMERG-F waslower 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) wasalso relatively high. Such high FAR value may indicate a significant small-scale spatial rainfall variabilityin mountainous area of Sumatra |
| Group of Knowledge | : | Fisika |
| Original Language | : | English |
| Level | : | Nasional |
| Status | : |
Published
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| No | Title | Action |
|---|---|---|
| 1 |
NEW-FULL-Paper-JIF.pdf
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