Performance evaluation and correction of precipitation data using the 20-year IMERG and TMPA precipitation products in diverse subregions of China

Qian, Ma; Li, Yi; Feng, Hao; Yu, Qiang; Zou, Yufeng; Liu, Fenggui; Pulatov, Bakhtiyor

doi:10.1016/j.atmosres.2020.105304

Cited by 67 publications

(46 citation statements)

References 47 publications

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“…Therefore, there can be discrepancies of the precipitation data between the TRMM and GPM eras. However, we do not observe an evident breakpoint in precipitation time series around 2014, indicating that the consistency of the IMERG dataset is robust during the transition period, which is in line with previous findings in China [35,85]. Thus, identifying sources of errors should be achieved to further improve satellite sensors and algorithms development [58].…”

Section: • Potential Limitationssupporting

confidence: 89%

“…IMERG provides rainfall and snowfall information at 0.1 • spatial and half-hour temporal resolutions. The recent version of IMERG V6 uses retrospective processing back through the TRMM era and integrates the advantages of many previous algorithms [83], such as the PERSIANN Cloud Classification System [84], TMPA satellite-gauge combination procedure [43], and CMORPH Kalman filter Lagrangian time interpolation algorithm [35] and covers the period beginning in June 2000 [85,86]. IMERG precipitation estimates from 2000 to 2018 indicated that IMERG is robust in the transition period around 2014 [35].…”

Section: Gridded Precipitation Datasetsmentioning

confidence: 99%

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Evaluation of Three Gridded Precipitation Products to Quantify Water Inputs over Complex Mountainous Terrain of Western China

et al. 2021

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This study evaluates the capacity of three gridded precipitation products (MSWEP V2.2, TRMM-3B42 V7, and GPM-IMERG V6) to detect precipitation in the Min Jiang watershed, a data-scarce and mountainous region in western China. A set of statistical and contingency indices is calculated for the precipitation products and compared with rain gauge observations at 23 ground stations from July 2000 to May 2016. Consistency between gridded and ground precipitation datasets is examined at different temporal (i.e., daily, monthly, seasonally, and annually) and spatial (i.e., site level, sub-regional level, and watershed level) resolutions. We identify possible reasons for discrepancies among precipitation datasets. Our results indicate that: (1) the MSWEP product is best suited for the study of long-term mesoscale rainfall, rather than short-term light or extreme rainfall; (2) the IMERG product represents stable performance for the simulation of rainfall spatial variability and detection capability; and (3) Composition of the datasets, climatic systems, and regional topography are key factors influencing the consistency between gridded and ground precipitation datasets. Therefore, we suggest using MSWEP V2.2 and GPM-IMERG V6 as potential precipitation data sources for hydrometeorological studies over the Min Jiang watershed. The findings of this study inform future hydrometeorological and climate applications in data-scarce regions with complex terrain.

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Section: • Potential Limitationssupporting

confidence: 89%

Section: Gridded Precipitation Datasetsmentioning

confidence: 99%

Evaluation of Three Gridded Precipitation Products to Quantify Water Inputs over Complex Mountainous Terrain of Western China

et al. 2021

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“…It implied that we must take measures to cope with local drought. For example, precipitation varies in different locations of China [75]. When the precipitation is low or the continuous evapotranspiration is large, southern China with a large correlation between different drought types should adapt farmland irrigation and river basin water storage at an early stage to avoid the impact of agricultural hydrological droughts.…”

Section: Discussionmentioning

confidence: 99%

National-Scale Variation and Propagation Characteristics of Meteorological, Agricultural, and Hydrological Droughts in China

Yao

Zhao

et al. 2020

Remote Sensing

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The regional and national scales variation and propagation characteristics of different types of droughts are critical for improving drought resilience, while information is limited in China. The objective of this research was to investigate the evolution and propagation characteristics of three types of droughts using standardized indices at multi-timescales in different sub-regions of China. The indices included Standardized Precipitation/Soil Moisture/Runoff Index (SPI/SSI/SRI) using the optimal probability density function, representing meteorological, agricultural, and hydrological droughts based on precipitation, soil water storage, and baseflow-groundwater runoff, respectively. Wavelet analysis was used to reveal their periodical characteristics. Modified Mann-Kendall trend test was used to compare the trend among drought indices. Correlation coefficients between SPI and SSI/SRI were calculated to identify the time-lags of SPI with SSI and SRI. In general, droughts indicated by SPI agreed well with the historical drought events at different sub-regions. The main periods of SSI were closer to SPI than SRI, indicating stronger connections of agricultural drought with meteorological drought. A weaker connection between meteorological and agricultural/hydrological droughts at shorter timescales was observed in northwestern arid and semi-arid regions. The propagation from meteorological to agricultural or hydrological droughts were well denoted by the lagged time (months) from SPI to SSI or SRI at a timescale ranged from 0 (mostly located in south China) to 5 months (mostly located in northeastern China) for 1-, 3-, 6-, 12-, or 24-month timescale; this was a new finding for China. The methods of wavelet combining trend test and Pearson coefficient showed meaningful power for revealing the drought propagation characteristics and the obtained results can be a good reference for other regions of the world since this study compared different climate zones from arid to humid conditions. The study provides crucial information and guidance to develop drought management strategies at regional to national scale and their critical time of action.

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“…Some comparative studies have reported that the latest GPM-Era high-resolution satellite precipitation products are superior to other satellite products [17]; however, their performance under various regions and climatic conditions tends to oscillate and needs further research. The reliability and accuracy of satellite data are affected by climatic and geographic conditions as well as seasons [18]. Despite their variability, a general tendency is that the accuracy of IMERG products improves as the time scale increases [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Evaluation and Hydrological Utility of the GPM IMERG Precipitation Products over the Xinfengjiang River Reservoir Basin, China

et al. 2021

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As a supplement to gauge observation data, many satellite observations have been used for hydrology and water resource research. This study aims to analyze the quality of the Integrated Multisatellite Retrieval for Global Precipitation Measurement (GPM IMERG) products and their hydrological utility in the Xinfengjiang River reservoir basin (XRRB), a mountainous region in southern China. The grid-based soil and water assessment tool (SWAT) model was used to construct a hydrological model of the XRRB based on two scenarios. The results showed that on a daily scale, the IMERG final run (FR) product was more accurate than the others, with Pearson’s correlation coefficients (CORR) of 0.61 and 0.71 on the grid accumulation scale and the average scale, respectively, and a relative bias (BIAS) of 0.01. In Scenario I (the SWAT model calibrated by rain gauge data), the IMERG-based simulation showed acceptable hydrologic prediction ability on the daily scale and satisfactory hydrological performance on the monthly scale. In Scenario II (the SWAT model calibrated by the FR), the hydrological performances of the FR on the daily and monthly scales were slightly better than those in Scenario I (the CORR was 0.64 and 0.85, the BIAS was 0.01 and −0.02, and the NSE was 0.43 and 0.84). These results showed the potential of the FR for hydrological modeling in tropical mountain watersheds in areas where information is scarce. This study is useful for hydrological, meteorological, and disaster studies in developing countries or remote areas with sparse or low-quality networks of ground-based observation stations.

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Performance evaluation and correction of precipitation data using the 20-year IMERG and TMPA precipitation products in diverse subregions of China

Cited by 67 publications

References 47 publications

Evaluation of Three Gridded Precipitation Products to Quantify Water Inputs over Complex Mountainous Terrain of Western China

Evaluation of Three Gridded Precipitation Products to Quantify Water Inputs over Complex Mountainous Terrain of Western China

National-Scale Variation and Propagation Characteristics of Meteorological, Agricultural, and Hydrological Droughts in China

Evaluation and Hydrological Utility of the GPM IMERG Precipitation Products over the Xinfengjiang River Reservoir Basin, China

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