Aerosol, Cumulus Congestus, MJO Xiaowen Li GEST/UMBC Wei-Kuo Tao NASA/GSFC Aerocenter Annual Meeting April 2010.

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Presentation transcript:

Aerosol, Cumulus Congestus, MJO Xiaowen Li GEST/UMBC Wei-Kuo Tao NASA/GSFC Aerocenter Annual Meeting April 2010

Cumulus Congestus ~10 3 m Making a connection…. Madden-Julian Oscillation ~10 7 m aerosols ~10 -7 m

TOGA COARE control Experiment with typical Maritime Aerosol concentrations (Jaenicke, 1988)

TOGA COARE 10x control aerosol number concentrations

Summary of TOGA COARE Simulation

Other Cloud Modeling Studies ∆P (%) ∆N (cm -3 ) GATE LBA

Why? TOGA COARE Thermodynamics; Characteristics of Maritime aerosols; Cloud microphysics and dynamics interactions; Implications on large scale circulations.

Average temperature profile from COARE IFA Thermodynamics Johnson (1999) Tropical oceanic sounding is characterized by ample water vapor supply, weak instability, and two inversion layers: trade wind inversion and 0°C inversion.

Higher concentrations at the large size tail but much lower concentration at smaller size continenal maritime Maritime Aerosols

High CCN Low CCN When there is large moisture supply, low CCN and less cloud drops resulted in less latent heat release. As a result, most clouds cannot pass the 0°C inversion level.

TOGA COARE IFA heating profiles during MJO events. The tilting at the MJO onset indicates cumulus congestus heating, which is poorly simulated in GCMs. (Lin et al. 2004)

aerosol conc characteristics of convection atmos heating Tropical wave speed intraseasonal variations and general circulation A Simplified Theory Aerosol cycle over clean tropical ocean needs to be considered in order to properly simulate convection intensity and MJO events.

Multi-Scale Modeling System with Unified Physics MMF: Multi-Scale Modeling Framework LIS: Land Information System GCE: Goddard Cumulus Ensemble Model WRF: Weather Research Forecast Goddard Microphysical Package (5 options) & Goddard Long/Shortwave Radiative Transfer (including cloud-radiation interaction) Satellite Data Field Campaigns Re-analyses (MERRA) TRMM Jan/99 MMF GOCART GCE - LBA (250 m, 30 sec) WRF- Hurricane Katrina (1.67 km, 2 min) Tao, W.-K., D. Anderson, J. Chern, J. Estin, A. Hou, P. Houser, R. Kakar, S. Lang, W. Lau, C. Peters-Lidard, X. Li, T. Matsui, M. Rienecker, M. R. Schoeberl B.-W. Shen, J.-J. Shi, and X. Zeng, 2009: Goddard Multi-Scale Modeling Systems with Unified Physics, Annales Geophysics, 27,

Thank You!