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タイトルEvaluation of the Sensitivity of the Amazonian Diurnal Cycle to Convective Intensity in Reanalyses
本文(外部サイト)http://hdl.handle.net/2060/20170003227
著者(英)Taylor, Patrick C.; Itterly, Kyle F.
発行日2016-04-16
言語eng
内容記述Model parameterizations of tropical deep convection are unable to reproduce the observed diurnal and spatial variability of convection in the Amazon, which contributes to climatological biases in the water cycle and energy budget. Convective intensity regimes are defined using percentiles of daily minimum 3-hourly averaged outgoing longwave radiation (OLR) from Clouds and the Earth's Radiant Energy System (CERES). This study compares the observed spatial variability of convective diurnal cycle statistics for each regime to MERRA-2 and ERA-Interim (ERA) reanalysis data sets. Composite diurnal cycle statistics are computed for daytime hours (06:00-21:00 local time) in the wet season (December-January-February). MERRA-2 matches observations more closely than ERA for domain averaged composite diurnal statistics-specifically precipitation. However, ERA reproduces mesoscale features of OLR and precipitation phase associated with topography and the propagation of the coastal squall line. Both reanalysis models are shown to underestimate extreme convection.
NASA分類Statistics and Probability; Meteorology and Climatology
レポートNONF1676L-25238
権利Copyright, Distribution as joint owner in the copyright


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