Simulation of Intense Convective Precipitation Observed during ARMEX

Someshwar DasSomeshwar Das1, R. Ashrit, R. Ashrit1, M. Dasgupta, M. Dasgupta1, , M. W. MoncrieffM. W. Moncrieff2, C. Liu, C. Liu2, J Dudhia, J Dudhia2 and S. R. Kalsi and S. R. Kalsi3

1National Centre for Medium Range Weather Forecasting, National Centre for Medium Range Weather Forecasting, NOIDANOIDA2National Centre for Atmospheric Research, Boulder, CO, USANational Centre for Atmospheric Research, Boulder, CO, USA

3India Meteorological Department, DelhiIndia Meteorological Department, Delhi

Nudging Experiments1.1. To simulate the evolution of Convective systemsTo simulate the evolution of Convective systems

during weak and Active phasesduring weak and Active phases

Active Phases: Active Phases: 20-22 June, 200220-22 June, 2002

26-28 June, 200226-28 June, 2002 Weak Phase:Weak Phase: 23-25 June, 200223-25 June, 2002

2. Whether to Nudge 2. Whether to Nudge Domain1 or,Domain1 or,

Domain2 or,Domain2 or,

Both?Both?

METEOSAT Cloud, 27 June 06 UTC & rainfall

Observed rainfall 26-28 June 2002

OLR and Anomaly (26-28 June 2002)

Nested domains at 90, 30, 10 & 2 km resolutions

Rainfall simulations using different cloud schemes

ARMEX Observation network

Cloud & Wind (FDDA, CTRL) 850 mb

Rainfall Forecasts

Time series of vertical velocity and Rainfall

Vertical Velocity

Simulation at 2km resolution

Cloud Microphysical properties

TRMM observed Rainfall & Cloud water species

Cloud Microphysical propertiesVertical cross section at 20.50 N

Total Condensates in the clouds & VV

Cloud fractions & rainfall

Vertical cross sections of T-anomaly & zonal wind

Schematic life cycle of the System

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