21st Conference on Climate Variability and Change


Year of Tropical Convection (YOTC): A Joint WWRP and WCRP Activity to Address the Challenges of Multi-Scale Organized Convection

Duane Edward Waliser, JPL, Pasadena, CA; and M. W. Moncrieff

The realistic representation of tropical convection in our global atmospheric models is a long-standing grand challenge for numerical weather prediction and climate projection. To address this challenge, WCRP and WWRP/THORPEX have proposed a Year of coordinated observing, modeling and forecasting of organized tropical convection and its influences on predictability. This effort is intended to exploit the vast amounts of existing and emerging observations, the expanding computational resources and the development of new, high-resolution modeling frameworks, with the objective of advancing the characterization, diagnosis, modeling, parameterization and prediction of multi-scale convective/dynamic interactions, including the two-way interaction between tropical and extra-tropical weather/climate. This activity and its ultimate success will be based on the coordination of a wide range of ongoing and planned international programmatic activities (e.g., GEWEX/CEOP/GCSS, THORPEX, EOS, AMY), strong collaboration among the operational prediction, research laboratory and academic communities, and the construction of a comprehensive data base consisting of satellite data, in-situ data sets and global/high-resolution forecast and simulation model outputs relevant to tropical convection. The target time frame for scientific focus is May 2008 to October 2009, and was chosen as a period that would leverage the most benefit from recent investments in Earth Science infrastructure and overlapping programmatic activities (e.g., AMY, T-PARC). Specific areas of emphasis identified in YOTC are: 1) MJO and convectively coupled waves, 2) diurnal cycle, 3) easterly waves and tropical cyclones, 4) tropical-extratropical interactions, and 5) monsoon. This presentation will describe the development of this activity, its current status and planned programmatic framework and research agenda.

wrf recording  Recorded presentation

Session 1A, Year of Tropical Convection
Monday, 12 January 2009, 10:45 AM-12:00 PM, Room 129A

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