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Seasonal evaluation of evapotranspiration fluxes from MODIS satellite and mesoscale model downscaled global reanalysis datasets
- Source :
- Theoretical and Applied Climatology. 124:461-473
- Publication Year :
- 2015
- Publisher :
- Springer Science and Business Media LLC, 2015.
-
Abstract
- Reference evapotranspiration (ETo) is an important variable in hydrological modeling, which is not always available, especially for ungauged catchments. Satellite data, such as those available from the MODerate Resolution Imaging Spectroradiometer (MODIS), and global datasets via the European Centre for Medium Range Weather Forecasts (ECMWF) reanalysis (ERA) interim and National Centers for Environmental Prediction (NCEP) reanalysis are important sources of information for ETo. This study explored the seasonal performances of MODIS (MOD16) and Weather Research and Forecasting (WRF) model downscaled global reanalysis datasets, such as ERA interim and NCEP-derived ETo, against ground-based datasets. Overall, on the basis of the statistical metrics computed, ETo derived from ERA interim and MODIS were more accurate in comparison to the estimates from NCEP for all the seasons. The pooled datasets also revealed a similar performance to the seasonal assessment with higher agreement for the ERA interim (r = 0.96, RMSE = 2.76 mm/8 days; bias = 0.24 mm/8 days), followed by MODIS (r = 0.95, RMSE = 7.66 mm/8 days; bias = −7.17 mm/8 days) and NCEP (r = 0.76, RMSE = 11.81 mm/8 days; bias = −10.20 mm/8 days). The only limitation with downscaling ERA interim reanalysis datasets using WRF is that it is time-consuming in contrast to the readily available MODIS operational product for use in mesoscale studies and practical applications.
- Subjects :
- Atmospheric Science
010504 meteorology & atmospheric sciences
Meteorology
0208 environmental biotechnology
Mesoscale meteorology
02 engineering and technology
01 natural sciences
020801 environmental engineering
Interim
Satellite data
Weather Research and Forecasting Model
Climatology
Evapotranspiration
Environmental science
Satellite
Moderate-resolution imaging spectroradiometer
0105 earth and related environmental sciences
Downscaling
Subjects
Details
- ISSN :
- 14344483 and 0177798X
- Volume :
- 124
- Database :
- OpenAIRE
- Journal :
- Theoretical and Applied Climatology
- Accession number :
- edsair.doi...........50d1682af14042a22a1f22acd2cea244