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| DOI | 10.3390/RS8100836 | ||||
| Año | 2016 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
We present an evaluation of daily estimates from three near real-time quasi-global Satellite Precipitation Products-Tropical Rainfall Measuring Mission (TRMM) Multi-satellite Precipitation Analysis (TMPA), Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks (PERSIANN), and Climate Prediction Center (CPC) Morphing Technique (CMORPH)-over the African continent, using the Global Precipitation Climatology Project one Degree Day (GPCP-1dd) as a reference dataset for years 2001 to 2013. Different types of errors are characterized for each season as a function of spatial classifications (latitudinal bands, climatic zones and topography) and in relationship with the main rain-producing mechanisms in the continent: the Intertropical Convergence Zone (ITCZ) and the East African Monsoon. A bias correction of the satellite estimates is applied using a probability density function (pdf) matching approach, with a bias analysis as a function of rain intensity, season and latitude. The effects of bias correction on different error terms are analyzed, showing an almost elimination of the mean and variance terms in most of the cases. While raw estimates of TMPA show higher efficiency, all products have similar efficiencies after bias correction. PERSIANN consistently shows the smallest median errors when it correctly detects precipitation events. The areas with smallest relative errors and other performance measures follow the position of the ITCZ oscillating seasonally over the equator, illustrating the close relationship between satellite estimates and rainfall regime.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Serrat-Capdevila, Aleix | - |
World Bank - Estados Unidos
UNIV ARIZONA - Estados Unidos The World Bank, USA - Estados Unidos The University of Arizona - Estados Unidos |
| 2 | Merino, Manuel | Hombre |
Montgomery & Associates Ltd - Chile
Montgomery and Associates Ltd. - Chile |
| 3 | Valdes, Juan B. | Hombre |
UNIV ARIZONA - Estados Unidos
The University of Arizona - Estados Unidos |
| 4 | Durcik, Matej | Hombre |
UNIV ARIZONA - Estados Unidos
The University of Arizona - Estados Unidos |
| Fuente |
|---|
| Comisión Nacional de Investigación Científica y Tecnológica (CONICYT) |
| NASA SERVIR Program |
| GeoAguas Consultores (Chile) |
| International Center for Integrated Water Resources Management (ICIWaRM) a Category II UNESCO Center |
| Agradecimiento |
|---|
| The work of the second author was supported by Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) and GeoAguas Consultores (Chile). Support for the other authors was provided by the NASA SERVIR Program through award 11-SERVIR11-0058 and the International Center for Integrated Water Resources Management (ICIWaRM) a Category II UNESCO Center. All contributions are gratefully acknowledged. |