The development of organized convection associated with the MJO during TOGA COARE IOP: Trimodal characteristics

Details The development of organized convection associated with the MJO during TOGA COARE IOP: Trimodal characteristics The development of organized convection associated with the MJO during TOGA COARE IOP: Trimodal characteristics

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3110101k&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 10, CiteID L10101

Computer Science

Sound

29

Meteorology And Atmospheric Dynamics: General Circulation, Meteorology And Atmospheric Dynamics: Precipitation (1854), Meteorology And Atmospheric Dynamics: Tropical Meteorology

Scientific paper

We constructed a composite lifecycle of the Madden-Julian oscillation (MJO) with cloud-top information and atmospheric temperature and moisture profiles. Japanese Geostationary Meteorological Satellite (GMS/IR TBB) histograms and upper-soundings from the Tropical Ocean-Global Atmosphere Coupled Ocean-Atmosphere Response Experiment (TOGA COARE) intensive observation period (IOP) were analyzed around Ujung Pandang (119°E, 5°S) and Kupang (123°E, 10°S), which encountered the mature phase of MJO from January to February, 1993. Under a large-scale boundary layer (BL) convergence, convection developed in stages:1) `suppressed stage' with suppressed clouds, 2) `shallow convection stage' (2-3 days) with clouds confined under the trade inversion level, 3) `developing stage' (3-4 days) with most clouds stopped at the mid-troposphere but some tall convective clouds developing 4) `mature stage' (4-5 days) with large anvil cloud shields, and 5) `decaying stage' with decaying anvils. These stages of MJO were related to three stable layers; trade inversion, 0°C level, and tropopause. It is suggested that staged convective development associated with the MJO was strongly affected by the interaction among convection, stable layers, and atmospheric moistening.

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