کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4450830 1311719 2010 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Raindrop size distributions of convective rain over equatorial Indonesia during the first CPEA campaign
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
پیش نمایش صفحه اول مقاله
Raindrop size distributions of convective rain over equatorial Indonesia during the first CPEA campaign
چکیده انگلیسی

As part of the Coupling Processes in the Equatorial Atmosphere (CPEA) campaign, precipitation was observed at Kototabang (0.20°S, 100.32°E), Indonesia, by a 2D-Video Disdrometer (2DVD), a 1.3-GHz wind profiler, an Equatorial Atmosphere Radar (EAR) and a Mobile Automatic Weather Station (MAWS). The campaign period is from April 10 to May 9, 2004. This paper presents a comprehensive follow-up of the previous study on the intraseasonal variation (ISV) of raindrop size distribution (DSD) during this campaign. The data were partitioned into stratiform, mixed stratiform/convective, deep convective and shallow convective. Besides the DSD parameters of gamma distribution, ΔZMP defined as the difference between a measured radar reflectivity and that from Marshall and Palmer's model was also analyzed. Intraseasonal variation of ΔZMP was only found at heavy rain. Consistent with the previous study, during the inactive phase, ΔZMPs were generally positive (broad DSD) and decrease toward negative values (narrow DSD) as the phase of ISV shifts to active ones. We found that a broad DSD and skewed towards higher drop diameters during the inactive ISV phase came mainly from deep convective, while a narrow DSD during the active phase came mainly from shallow convective events. Like surface DSD, mass-weighted mean diameter (Dm) revealed from the EAR measurement was also larger during the inactive phase (deep convective) than that for the active phase (shallow convective). In general, we found that vertical profile of reflectivity gradient (VPRG) from 1.3-GHz wind profiler observations during the inactive phase was larger than for the active phase. This phenomenon may be due to significant coalescence process during the inactive phase.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Research - Volume 96, Issue 4, June 2010, Pages 645–655
نویسندگان
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