Studio della convezione durante il monsone africano: osservazioni e modellazione della precipitazione e del ruolo della circolazione regionale sulla composizione atmosferica

Doctoral thesis Italian OPEN
Orlandi, Emiliano (2010)
  • Publisher: Università degli studi di Ferrara
  • Subject: fuochi di biomassa | in traccia | meteorological models | FIS/06 | convection | trasporto di gas | precipitation | convezione | FIS/06 Fisica per il sistema terra e il mezzo circumterrestre | modelli meteorologici | monsone africano | precipitazione | trace gases transport | African monsons

The improvement of knowledge and understanding of the West African Monsoon (WAM) is a fundamental scientific issue with implications on economy, health, water resources and food security in West African countries. In a region where agriculture is mainly rain fed, ... View more
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    3 How to improve the model scores? A simple data assimilation approach 31 3.1 Observations used . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 3.2 The BOLAM model . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 3.3 Description of the MCS event . . . . . . . . . . . . . . . . . . . . . 35 3.4 Nudging procedure and simulation set-up . . . . . . . . . . . . . . . 38 3.4.1 Sensitivity tests . . . . . . . . . . . . . . . . . . . . . . . . . 41 3.5 Comparison of simulated MCS lifecycle with observations . . . . . . 43 3.5.1 Cloud top brightness temperature . . . . . . . . . . . . . . . 43 3.5.2 Rainfall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 3.6 Nudging impact on model dynamics . . . . . . . . . . . . . . . . . . 55

    4 The AMMA field campaign 61 4.1 Description of the AMMA field campaign . . . . . . . . . . . . . . . 61

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