WRF Modeling of the Madden-Julian Oscillation in the Indian and Western Pacific Oceans during AMIE/DYNAMO Field Campaign
Abstract
The Madden-Julian Oscillation (MJO) is the dominant component of the intraseasonal variability in the tropical atmosphere. Past studies have shown the challenge and limitations of global general circulation models in representing MJO structures. To improve model predictability and our understanding for MJO, a regional mesoscale model - WRF is introduced in this study for high-resolution simulations. A series of sensitivity runs will be carried out during the AMIE/DYNAMO field campaign period October 2011 - March 2012 to improve MJO simulations and reduce precipitation biases, including tests on physics parameterization schemes (e.g. convective scheme, microphysics schemes), initial and lateral boundary forcing (i.e. NCEP-FNL, ERA-interim, MERRA). The results will be validated against satellite observations and reanalysis datasets on several key variables, such as precipitation, outgoing longwave radiation, wind, moisture and hydrometeors. By examining precipitation fields between model and TRMM 3B42RT, the current model configuration has captured the eastward propagating MJO event during October 2011. By compiling simulation results from different model configurations, we are expecting to gain insights on key processes associated with MJO and to improve mesoscale model simulations.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2012
- Bibcode:
- 2012AGUFM.A13A0204L
- Keywords:
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- 3355 ATMOSPHERIC PROCESSES / Regional modeling;
- 3373 ATMOSPHERIC PROCESSES / Tropical dynamics