Application of Graph-Theory Based Algorithm for Identifying Convective Complex Systems over Greater Jakarta basins

3rd International Seminar On Sciences "Sciences On Precision And Sustainable Agriculture"

Nuryanto, D.E.^1,2 ; Aldrian, E.^3 ; Pawitan, H.^1 ; Hidayat, R.^1

Department of Geophysics and Meteorology, FMIPA Bogor Agricultural University, Kampus IPB Darmaga, West Java, Bogor

16680, Indonesia^1

Research and Development Center, Indonesian Agency for Meteorology Climatology and Geophysics, Jl Angkasa I No 2, Kemayoran Jakarta Pusat

10720, Indonesia^2

Agency for the Assessment and Application of Technology, Jl MH Thamrin No 8, Jakarta

10340, Indonesia^3

关键词: Black body;    Cloud shields;    Convective clouds;    Convective systems;    Heavy rainfall;    Jakarta;    Local time;    Mesoscale Convective System;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/58/1/012002/pdf
DOI  :  10.1088/1755-1315/58/1/012002

来源: IOP

【 摘 要 】

Heavy rainfalls over the Greater Jakarta (GJ) basins during January 14 - 15th, 2013 were suspected to be derived from convective complex systems (CCSs) as subsets of mesoscale convective systems (MCSs). This study, implementing a graph-theory based algorithm on black body temperature (TBB) dataset, identified CCS over GJ during heavy rainfall event on January 14 - 15th, 2013. We found that convective cloud cluster for ≤ 221 K of TBB more than 6 hours (about 16 hours of duration) with average of eccentricity was 0.47. The maximum area of this system was about 249,731.9 km2at 0300 Local Time (LT) January 15th, 2013. Ones of these convective system features is not match with MCC definition. We defined this convective system as convective cloud system that large, long lived, and very cold of cloud shield. This system is in agreement with heavy rainfall (more than 40 mm/3h) at 0200 - 0400 LT January 15th, 2013 over GJ basins.