2010
DOI: 10.1029/2010jd013919
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West African Monsoon water cycle: 2. Assessment of numerical weather prediction water budgets

Abstract: [1] Water budgets from European Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis (ERA)-Interim and National Centers for Environmental Prediction (NCEP) Reanalysis I and II are intercompared and compared to GPS precipitable water and to the 6 year hybrid budget data set described in part 1 of this study. Deficiencies are evidenced in the reanalyses which are most pronounced over the Sahel.Results from operational models (ECMWF Integrated Forecast System, NCEP Global Forecast System, and ARPEGE-Trop… Show more

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Cited by 52 publications
(66 citation statements)
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References 68 publications
(87 reference statements)
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“…ERA-Interim has half the grid-length of ERA40 and has 16 pressure-levels between 500 hPa and 1000 hPa compared to just 7 in ERA40. Several of the peak meridional and zonal fluxes highlighted in section 4 of this paper were around 50% stronger in ERA-Interim, which is consistent with the resolution dependence discussed by Meynadier et al (2010). It should be recognized however that since the ERA40 and ERA-Interim model and analysis systems are also different, the differences may not be just due to resolution.…”
Section: Methodssupporting
confidence: 73%
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“…ERA-Interim has half the grid-length of ERA40 and has 16 pressure-levels between 500 hPa and 1000 hPa compared to just 7 in ERA40. Several of the peak meridional and zonal fluxes highlighted in section 4 of this paper were around 50% stronger in ERA-Interim, which is consistent with the resolution dependence discussed by Meynadier et al (2010). It should be recognized however that since the ERA40 and ERA-Interim model and analysis systems are also different, the differences may not be just due to resolution.…”
Section: Methodssupporting
confidence: 73%
“…The errors associated with data assimilation and time truncation error require a detailed comparison with independent in situ measurements (cf. Meynadier et al, 2010) which is beyond the scope of our study. It should be stressed here, however, that while the magnitudes of moisture fluxes and their convergence are important, the most important aspects that will be emphasized here are the time evolution of the patterns and how these relate to the regional circulations.…”
Section: Methodsmentioning
confidence: 89%
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“…The Sahel has suffered serious droughts during recent decades (Janicot et al, 2008) and therefore it is important that rainfall variability can be predicted on various time-scales. There are currently problems with rainfall prediction over West Africa, both at numerical weather prediction (Meynadier et al, 2010;Agustí-Panareda et al, 2010c) and at climate scales (Hourdin et al, 2010). MCSs are a particular problem in global models because accurate representation of their trajectories, propagation speed and precipitation distribution requires the explicit treatment of moist convection.…”
Section: Convection and Land-surface Interaction Over West Africamentioning
confidence: 99%