Evaluation of IMERG Level-3 Products in Depicting the July to October Rainfall over Taiwan: Typhoon Versus Non-Typhoon
Abstract
:1. Introduction
2. Data and Methods
2.1. Data
2.2. Identification of TC and Non-TC Rainy Days
2.3. Statistical Methods for Comparison
3. Results
3.1. Seasonal Mean
3.2. Daily Variation
3.3. Interannual Variation
4. Discussions
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Satellite Product | Upload Delay Time | Spatial Resolution | Time Resolution | Morphing Algorithm |
---|---|---|---|---|
IMERG-E | 4 h | 0.1° × 0.1° | 30 min | forward |
IMERG-L | 14 h | 0.1° × 0.1° | 30 min | forward and backward |
IMERG-F | 3.5 month | 0.1° × 0.1° | 30 min | forward and backward |
TRMM7 | 2.5 month | 0.25° × 0.25° | 3 h | - |
CWB ≥ Rainfall Threshold | CWB < Rainfall Threshold | |
---|---|---|
SPP≥rainfall threshold | hits | false alarms |
SPP <rainfall threshold | misses | correct rejections |
CWB | IMERG-E | IMERG-L | IMERG-F | TRMM7 | |
---|---|---|---|---|---|
Total rainfall | 11.76 | 8.81 | 9.00 | 10.01 | 8.52 |
Non-TC rainfall | 6.31 | 4.47 | 4.62 | 5.16 | 4.56 |
TC rainfall | 49.29 | 38.66 | 39.13 | 43.57 | 35.48 |
Non-TC Rainfall | TC Rainfall | |||
---|---|---|---|---|
SPP | Days | % | Days | % |
IMERG-E | 1004 | 51.7 | 203 | 72.0 |
IMERG-L | 1013 | 52.2 | 210 | 74.5 |
IMERG-F | 993 | 51.1 | 202 | 71.6 |
TRMM7 | 916 | 47.2 | 191 | 67.7 |
Non-TC Rainfall | TC Rainfall | |||
---|---|---|---|---|
SPP | Tcorr | RRMSE | Tcorr | RRMSE |
IMERG-E | 0.88 | 0.32 | 0.92 | 0.29 |
IMERG-L | 0.90 | 0.29 | 0.93 | 0.28 |
IMERG-F | 0.91 | 0.23 | 0.99 | 0.14 |
TRMM7 | 0.90 | 0.30 | 0.91 | 0.35 |
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Huang, W.-R.; Liu, P.-Y.; Chang, Y.-H.; Lee, C.-A. Evaluation of IMERG Level-3 Products in Depicting the July to October Rainfall over Taiwan: Typhoon Versus Non-Typhoon. Remote Sens. 2021, 13, 622. https://doi.org/10.3390/rs13040622
Huang W-R, Liu P-Y, Chang Y-H, Lee C-A. Evaluation of IMERG Level-3 Products in Depicting the July to October Rainfall over Taiwan: Typhoon Versus Non-Typhoon. Remote Sensing. 2021; 13(4):622. https://doi.org/10.3390/rs13040622
Chicago/Turabian StyleHuang, Wan-Ru, Pin-Yi Liu, Ya-Hui Chang, and Cheng-An Lee. 2021. "Evaluation of IMERG Level-3 Products in Depicting the July to October Rainfall over Taiwan: Typhoon Versus Non-Typhoon" Remote Sensing 13, no. 4: 622. https://doi.org/10.3390/rs13040622