Object-Based Analysis of Satellite-Derived Precipitation Systems over the Low- and Midlatitude Pacific Ocean

• DOI: 10.1175/2009mwr2900.1
• Publication Date: 2009-04-29T15:53:47Z
• Authors: Gregor Skok; Joe Tribbia; Jože Rakovec; Barbara Brown
• Keywords: Intertropical Convergence Zone

Abstract The Method for Object-based Diagnostic Evaluation (MODE) developed by Davis et al. is implemented and extended to characterize the temporal behavior of objects perform a diagnostic analysis on spatial distribution properties precipitation systems over equatorial Pacific Ocean. performed two satellite-derived datasets [Tropical Rainfall Measuring Mission (TRMM) 3B42 Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks (PERSIANN)]. A sensitivity showed that convolution produces an unwanted “spillover” effect large radius too much smoothing, which results in unrealistically objects. largest most long-lived tropical are typically located western part. good ability track was demonstrated: movement ITCZ both westward eastward although more frequent eastern part dominant. Movement midlatitudes predominantly eastward. These findings were common satellite products, despite fact average rainfall accumulation can differ 20%–30% occurrence with long life spans 20%.