Evaluation of the TMPA-3B42 precipitation product using a high-density rain gauge network over complex terrain in northeastern Iberia

Handle URI:
http://hdl.handle.net/10754/594235
Title:
Evaluation of the TMPA-3B42 precipitation product using a high-density rain gauge network over complex terrain in northeastern Iberia
Authors:
El Kenawy, Ahmed M. ( 0000-0001-6639-6253 ) ; Lopez-Moreno, Juan I.; McCabe, Matthew ( 0000-0002-1279-5272 ) ; Vicente-Serrano, Sergio M.
Abstract:
The performance of the Tropical Rainfall Measuring Mission (TRMM) Multi-satellite Precipitation Analysis (TMPA)-3B42 version 7 product is assessed over north-eastern Iberia, a region with considerable topographical gradients and complexity. Precipitation characteristics from a dense network of 656 rain gauges, spanning the period from 1998 to 2009, are used to evaluate TMPA-3B42 estimates on a daily scale. A set of accuracy estimators, including the relative bias, mean absolute error (MAE), root mean square error (RMSE) and Spearman coefficient was used to evaluate the results. The assessment indicates that TMPA-3B42 product is capable of describing the seasonal characteristics of the observed precipitation over most of the study domain. In particular, TMPA-3B42 precipitation agrees well with in situ measurements, with MAE less than 2.5mm.day-1, RMSE of 6.4mm.day-1 and Spearman correlation coefficients generally above 0.6. TMPA-3B42 provides improved accuracies in winter and summer, whereas it performs much worse in spring and autumn. Spatially, the retrieval errors show a consistent trend, with a general overestimation in regions of low altitude and underestimation in regions of heterogeneous terrain. TMPA-3B42 generally performs well over inland areas, while showing less skill in the coastal regions. A set of skill metrics, including a false alarm ratio [FAR], frequency bias index [FBI], the probability of detection [POD] and threat score [TS], is also used to evaluate TMPA performance under different precipitation thresholds (1, 5, 10, 25 and 50mm.day-1). The results suggest that TMPA-3B42 retrievals perform well in specifying moderate rain events (5-25mm.day-1), but show noticeably less skill in producing both light (<1mm.day-1) and heavy rainfall thresholds (more than 50mm.day-1). Given the complexity of the terrain and the associated high spatial variability of precipitation in north-eastern Iberia, the results reveal that TMPA-3B42 data provide an informative addition to the spatial and temporal coverage of rain gauges in the domain, offering insights into characteristics of average precipitation and their spatial patterns. However, the satellite-based precipitation data should be used cautiously for monitoring extreme precipitation events, particularly over complex terrain. An improvement in precipitation algorithms is still needed to more accurately reproduce high precipitation events in areas of heterogeneous topography over this region.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division
Citation:
El Kenawy AM, Lopez-Moreno JI, McCabe MF, Vicente-Serrano SM (2015) Evaluation of the TMPA-3B42 precipitation product using a high-density rain gauge network over complex terrain in northeastern Iberia. Global and Planetary Change 133: 188–200. Available: http://dx.doi.org/10.1016/j.gloplacha.2015.08.013.
Publisher:
Elsevier BV
Journal:
Global and Planetary Change
Issue Date:
29-Aug-2015
DOI:
10.1016/j.gloplacha.2015.08.013
Type:
Article
ISSN:
0921-8181
Sponsors:
Research reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST), Saudi Arabia. This work has also been supported by the research project LIFE12 ENV/ES/000536 (Demonstration and validation of innovative methodology for regional climate change adaptation in the Mediterranean area-LIFE MEDACC) financed by the LIFE program of the European Commission. We acknowledge the National Aeronautics and Space Administration (NASA) for providing the TMPA-3B42 dataset and the Spanish State Meteorological Agency (AEMET) for providing precipitation observations.
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0921818115300084
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorEl Kenawy, Ahmed M.en
dc.contributor.authorLopez-Moreno, Juan I.en
dc.contributor.authorMcCabe, Matthewen
dc.contributor.authorVicente-Serrano, Sergio M.en
dc.date.accessioned2016-10-17T06:53:10Z-
dc.date.available2016-01-19T14:44:01Zen
dc.date.available2016-10-17T06:53:10Z-
dc.date.issued2015-08-29-
dc.identifier.citationEl Kenawy AM, Lopez-Moreno JI, McCabe MF, Vicente-Serrano SM (2015) Evaluation of the TMPA-3B42 precipitation product using a high-density rain gauge network over complex terrain in northeastern Iberia. Global and Planetary Change 133: 188–200. Available: http://dx.doi.org/10.1016/j.gloplacha.2015.08.013.en
dc.identifier.issn0921-8181-
dc.identifier.doi10.1016/j.gloplacha.2015.08.013-
dc.identifier.urihttp://hdl.handle.net/10754/594235-
dc.description.abstractThe performance of the Tropical Rainfall Measuring Mission (TRMM) Multi-satellite Precipitation Analysis (TMPA)-3B42 version 7 product is assessed over north-eastern Iberia, a region with considerable topographical gradients and complexity. Precipitation characteristics from a dense network of 656 rain gauges, spanning the period from 1998 to 2009, are used to evaluate TMPA-3B42 estimates on a daily scale. A set of accuracy estimators, including the relative bias, mean absolute error (MAE), root mean square error (RMSE) and Spearman coefficient was used to evaluate the results. The assessment indicates that TMPA-3B42 product is capable of describing the seasonal characteristics of the observed precipitation over most of the study domain. In particular, TMPA-3B42 precipitation agrees well with in situ measurements, with MAE less than 2.5mm.day-1, RMSE of 6.4mm.day-1 and Spearman correlation coefficients generally above 0.6. TMPA-3B42 provides improved accuracies in winter and summer, whereas it performs much worse in spring and autumn. Spatially, the retrieval errors show a consistent trend, with a general overestimation in regions of low altitude and underestimation in regions of heterogeneous terrain. TMPA-3B42 generally performs well over inland areas, while showing less skill in the coastal regions. A set of skill metrics, including a false alarm ratio [FAR], frequency bias index [FBI], the probability of detection [POD] and threat score [TS], is also used to evaluate TMPA performance under different precipitation thresholds (1, 5, 10, 25 and 50mm.day-1). The results suggest that TMPA-3B42 retrievals perform well in specifying moderate rain events (5-25mm.day-1), but show noticeably less skill in producing both light (<1mm.day-1) and heavy rainfall thresholds (more than 50mm.day-1). Given the complexity of the terrain and the associated high spatial variability of precipitation in north-eastern Iberia, the results reveal that TMPA-3B42 data provide an informative addition to the spatial and temporal coverage of rain gauges in the domain, offering insights into characteristics of average precipitation and their spatial patterns. However, the satellite-based precipitation data should be used cautiously for monitoring extreme precipitation events, particularly over complex terrain. An improvement in precipitation algorithms is still needed to more accurately reproduce high precipitation events in areas of heterogeneous topography over this region.en
dc.description.sponsorshipResearch reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST), Saudi Arabia. This work has also been supported by the research project LIFE12 ENV/ES/000536 (Demonstration and validation of innovative methodology for regional climate change adaptation in the Mediterranean area-LIFE MEDACC) financed by the LIFE program of the European Commission. We acknowledge the National Aeronautics and Space Administration (NASA) for providing the TMPA-3B42 dataset and the Spanish State Meteorological Agency (AEMET) for providing precipitation observations.en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0921818115300084en
dc.rightsThis is the accepted version of an article that appeared in final form in the journal Global and Planetary Change available at: http://dx.doi.org/10.1016/j.gloplacha.2015.08.013en
dc.subjectEvaluationen
dc.subjectIberiaen
dc.subjectPrecipitationen
dc.subjectRain gaugesen
dc.subjectTMPA-3B42en
dc.titleEvaluation of the TMPA-3B42 precipitation product using a high-density rain gauge network over complex terrain in northeastern Iberiaen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalGlobal and Planetary Changeen
dc.eprint.versionPost-printen
dc.contributor.institutionInstituto Pirenaico de Ecología-CSIC, Campus de Aula Dei, P.O. Box 13034, Zaragoza, Spainen
dc.contributor.institutionDepartment of Geography, Mansoura University, Mansoura, Egypten
kaust.authorEl Kenawy, Ahmed M.en
kaust.authorMcCabe, Matthewen

Version History

VersionItem Editor Date Summary
2 10754/594235grenzdm2016-10-17 07:45:21.0Author accepted manuscript version received from Prof. Matthew McCabe.
1 10754/594235.1grenzdm2016-01-19 14:44:01.0null
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