Evaluation of the TRMM Product for Monitoring Drought over Paraíba State, Northeastern Brazil: A Statistical Analysis
Drought is a natural phenomenon that originates from the absence of precipitation over a certain period and is capable of causing damage to societal development. With the advent of orbital remote sensing, rainfall estimates from satellites have appeared as viable alternatives to monitor natural haza...
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| Format: | Article |
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MDPI AG
2020-07-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/12/14/2184 |
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| author | Reginaldo Moura Brasil Neto Celso Augusto Guimarães Santos Thiago Victor Medeiros do Nascimento Richarde Marques da Silva Carlos Antonio Costa dos Santos |
| author_facet | Reginaldo Moura Brasil Neto Celso Augusto Guimarães Santos Thiago Victor Medeiros do Nascimento Richarde Marques da Silva Carlos Antonio Costa dos Santos |
| author_sort | Reginaldo Moura Brasil Neto |
| collection | DOAJ |
| description | Drought is a natural phenomenon that originates from the absence of precipitation over a certain period and is capable of causing damage to societal development. With the advent of orbital remote sensing, rainfall estimates from satellites have appeared as viable alternatives to monitor natural hazards in ungauged basins and complex areas of the world; however, the accuracies of these orbital products still need to be verified. Thus, this work aims to evaluate the performance of Tropical Rainfall Measuring Mission (TRMM) satellite rainfall estimates in monitoring the spatiotemporal behavior of droughts at multiple temporal scales over Paraíba State based on the standardized precipitation index (SPI) over 20 years (1998–2017). For this purpose, rainfall data from 78 rain gauges and 187 equally spaced TRMM cell grids throughout the region are used, and accuracy analyses are performed at the single-gauge level and in four mesoregions at eight different time scales based on 11 statistical metrics calculations divided into three different categories. The results show that in the mesoregions close to the coast, the satellite-based product is less accurate in capturing the drought behavior regardless of the evaluated statistical metrics. At the temporal scale, the TRMM is more accurate in identifying the pattern of medium-term droughts; however, there is considerable spatial variation in the accuracy of the product depending on the performance index. Therefore, it is concluded that rainfall estimates from the TRMM satellite are a valuable source of data to identify drought behavior in a large part of Paraíba State at different time scales, and further multidisciplinary studies should be conducted to monitor these phenomena more accurately based on satellite data. |
| first_indexed | 2024-03-10T18:36:28Z |
| format | Article |
| id | doaj.art-4d533142bc2548e1935432e960006598 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T18:36:28Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-4d533142bc2548e1935432e9600065982023-11-20T06:11:28ZengMDPI AGRemote Sensing2072-42922020-07-011214218410.3390/rs12142184Evaluation of the TRMM Product for Monitoring Drought over Paraíba State, Northeastern Brazil: A Statistical AnalysisReginaldo Moura Brasil Neto0Celso Augusto Guimarães Santos1Thiago Victor Medeiros do Nascimento2Richarde Marques da Silva3Carlos Antonio Costa dos Santos4Department of Civil Engineering and Environmental Engineering, Federal University of Paraíba, 58051-900 João Pessoa, BrazilDepartment of Civil Engineering and Environmental Engineering, Federal University of Paraíba, 58051-900 João Pessoa, BrazilDepartment of Civil Engineering and Environmental Engineering, Federal University of Paraíba, 58051-900 João Pessoa, BrazilDepartment of Geosciences, Federal University of Paraíba, 58051-900 João Pessoa, BrazilAcademic Unit of Atmospheric Sciences, Federal University of Campina Grande, 58109-970 Campina Grande, BrazilDrought is a natural phenomenon that originates from the absence of precipitation over a certain period and is capable of causing damage to societal development. With the advent of orbital remote sensing, rainfall estimates from satellites have appeared as viable alternatives to monitor natural hazards in ungauged basins and complex areas of the world; however, the accuracies of these orbital products still need to be verified. Thus, this work aims to evaluate the performance of Tropical Rainfall Measuring Mission (TRMM) satellite rainfall estimates in monitoring the spatiotemporal behavior of droughts at multiple temporal scales over Paraíba State based on the standardized precipitation index (SPI) over 20 years (1998–2017). For this purpose, rainfall data from 78 rain gauges and 187 equally spaced TRMM cell grids throughout the region are used, and accuracy analyses are performed at the single-gauge level and in four mesoregions at eight different time scales based on 11 statistical metrics calculations divided into three different categories. The results show that in the mesoregions close to the coast, the satellite-based product is less accurate in capturing the drought behavior regardless of the evaluated statistical metrics. At the temporal scale, the TRMM is more accurate in identifying the pattern of medium-term droughts; however, there is considerable spatial variation in the accuracy of the product depending on the performance index. Therefore, it is concluded that rainfall estimates from the TRMM satellite are a valuable source of data to identify drought behavior in a large part of Paraíba State at different time scales, and further multidisciplinary studies should be conducted to monitor these phenomena more accurately based on satellite data.https://www.mdpi.com/2072-4292/12/14/2184droughtSPITRMMParaíba |
| spellingShingle | Reginaldo Moura Brasil Neto Celso Augusto Guimarães Santos Thiago Victor Medeiros do Nascimento Richarde Marques da Silva Carlos Antonio Costa dos Santos Evaluation of the TRMM Product for Monitoring Drought over Paraíba State, Northeastern Brazil: A Statistical Analysis Remote Sensing drought SPI TRMM Paraíba |
| title | Evaluation of the TRMM Product for Monitoring Drought over Paraíba State, Northeastern Brazil: A Statistical Analysis |
| title_full | Evaluation of the TRMM Product for Monitoring Drought over Paraíba State, Northeastern Brazil: A Statistical Analysis |
| title_fullStr | Evaluation of the TRMM Product for Monitoring Drought over Paraíba State, Northeastern Brazil: A Statistical Analysis |
| title_full_unstemmed | Evaluation of the TRMM Product for Monitoring Drought over Paraíba State, Northeastern Brazil: A Statistical Analysis |
| title_short | Evaluation of the TRMM Product for Monitoring Drought over Paraíba State, Northeastern Brazil: A Statistical Analysis |
| title_sort | evaluation of the trmm product for monitoring drought over paraiba state northeastern brazil a statistical analysis |
| topic | drought SPI TRMM Paraíba |
| url | https://www.mdpi.com/2072-4292/12/14/2184 |
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