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Abstract
Global precipitation demonstrates a substantial role in the hydrological cycle and offers tremendous implications in hydrometeorological studies. Advanced remote sensing instrumentations, such as the NASA Global Precipitation Measurement (GPM) mission Dual-Frequency Precipitation Radar (DPR), can estimate precipitation and cloud properties and have a unique capability to estimate the raindrop size information globally at snapshots in time. The present study validates the Level-2 data products of the GPM DPR with the long-term measurements of seven north Taiwan Joss–Waldvogel disdrometers from 2014 to 2022. The precipitation and drop size distribution parameters like rainfall rate (R; mm h21), radar reflectivity factor (dBZ), mass-weighted mean drop diameter (Dm; mm), and normalized intercept parameter (Nw; m23 mm21) of the GPM DPR are compared with the disdrometers. Four different comparison approaches (point match, 5-km average, 10-km average, and optimal method) are used for the validation; among these four, the optimal strategy provided reasonable agreement between the GPM DPR and the disdrometers. The GPM DPR revealed superior performance in estimating the rain parameters in stratiform precipitation than the convective precipitation. Irrespective of algorithm type (dual-or single-frequency algorithm), sensitivity analysis revealed superior agreement for the mass-weighted mean diameter and inferior agreement for the normalized intercept parameter.
Original language | English |
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Pages (from-to) | 47-64 |
Number of pages | 18 |
Journal | Journal of Hydrometeorology |
Volume | 25 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2024 |
Keywords
- In situ atmospheric observations
- Radars/Radar observations
- Remote sensing
- Statistics
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Dive into the research topics of 'Evaluation of GPM DPR Rain Parameters with North Taiwan Disdrometers'. Together they form a unique fingerprint.Projects
- 4 Finished
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氣象巨量資料應用在即時與極短期臺灣暴雨與強風的預報技術提升與相關災害防治-氣象巨量資料應用在即時與極短期臺灣暴雨與強風的預報技術提升與相關災害防治(2/2)
Lin, P.-L. (PI)
1/08/22 → 31/07/23
Project: Research
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臺灣區域豪雨觀測與預報實驗後續研究-梅雨與颱風季降雨微物理與邊界層熱動力特性之研究(總計畫及子計畫一)
Lin, P.-L. (PI)
1/08/22 → 31/10/23
Project: Research
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臺灣區域豪雨觀測與預報實驗後續研究-TAHOPE梅雨與颱風季降雨微物理與邊界層熱動力特性之研究(總計畫及子計畫一)
Lin, P.-L. (PI)
1/08/21 → 31/10/22
Project: Research