Understanding the Split Characteristics of the Tropical Mesoscale Convective System (MCS) of April 9, 2018, in Northern Ghana Using Infrasound Data  

作　　者：K. Benjamin Kouassi Fidele Yoroba Uchenna Onwuhaka Madu Adama Diawara Kouakou Kouadio Paul Antoine Yao K. Benjamin Kouassi;Fidele Yoroba;Uchenna Onwuhaka Madu;Adama Diawara;Kouakou Kouadio;Paul Antoine Yao(Laboratoire des Sciences de la Matière, de l’Environnement et de l’Energie Solaire (LASMES), UFR-SSMT, University FHB, Abidjan, Côte d’Ivoire;Station Geophysique de Lamto, N’Douci, Cote d’Ivoire;Nigeria Atomic Energy Commission, Abuja, Nigeria)

机构地区：[1]Laboratoire des Sciences de la Matière, de l’Environnement et de l’Energie Solaire (LASMES), UFR-SSMT, University FHB, Abidjan, Cô te d’Ivoire [2]Station Geophysique de Lamto, N’Douci, Cote d’Ivoire [3]Nigeria Atomic Energy Commission, Abuja, Nigeria

出　　处：《Atmospheric and Climate Sciences》2021年第1期1-10,共10页大气和气候科学（英文）

摘　　要：The split characteristics of the tropical Mesoscale Convective System (MCS) of April 9, 2018, in northern Ghana were studied using infrasound data measured by the mobile array (I68CI) which was deployed by C<span style="white-space:nowrap;">?</span>te d’Ivoire National Data Center (NDC) in collaboration with the Comprehensive Nuclear-Test-Ban Treaty (CTBT). These infrasound measurements were made during a measurement campaign from January 1st, 2018 to December 31, 2018, in northeast Cote d’Ivoire, precisely in Comoe National Park. Graphic Progressive Multi-Channel Correlation (GPMCC) method based on a progressive study of the correlation functions was used to analyze and visualize data. The infrasound detection from this MCS shows clearly a division of the MCS structure into 2 distinct subsystems under the effect of internal and external constraints not well known but related to convection;a smaller subsystem in the north, associated with an area of intense rainfall of about 30 mm/hour and located at 9.5<span style="white-space:nowrap;">°</span>N - 2<span style="white-space:nowrap;">°</span>E with an azimuth of 70<span style="white-space:nowrap;">°</span> and, a large subsystem in the south, associated with a zone of high rainfall of about 96 mm/hour and located at 8.8<span style="white-space:nowrap;">°</span>N - 1.4<span style="white-space:nowrap;">°</span>E with an azimuth of 90<span style="white-space:nowrap;">°</span>. These two subsystems were located 200 km and 260 km from the I68CI station with frequencies of 2.3 Hz and 1 Hz respectively. The mesoscale convective systems in this region are moving from East to West and including several storm cells.The split characteristics of the tropical Mesoscale Convective System (MCS) of April 9, 2018, in northern Ghana were studied using infrasound data measured by the mobile array (I68CI) which was deployed by C<span style="white-space:nowrap;">?</span>te d’Ivoire National Data Center (NDC) in collaboration with the Comprehensive Nuclear-Test-Ban Treaty (CTBT). These infrasound measurements were made during a measurement campaign from January 1st, 2018 to December 31, 2018, in northeast Cote d’Ivoire, precisely in Comoe National Park. Graphic Progressive Multi-Channel Correlation (GPMCC) method based on a progressive study of the correlation functions was used to analyze and visualize data. The infrasound detection from this MCS shows clearly a division of the MCS structure into 2 distinct subsystems under the effect of internal and external constraints not well known but related to convection;a smaller subsystem in the north, associated with an area of intense rainfall of about 30 mm/hour and located at 9.5<span style="white-space:nowrap;">°</span>N - 2<span style="white-space:nowrap;">°</span>E with an azimuth of 70<span style="white-space:nowrap;">°</span> and, a large subsystem in the south, associated with a zone of high rainfall of about 96 mm/hour and located at 8.8<span style="white-space:nowrap;">°</span>N - 1.4<span style="white-space:nowrap;">°</span>E with an azimuth of 90<span style="white-space:nowrap;">°</span>. These two subsystems were located 200 km and 260 km from the I68CI station with frequencies of 2.3 Hz and 1 Hz respectively. The mesoscale convective systems in this region are moving from East to West and including several storm cells.

关 键 词：INFRASOUND Mesoscale Convective Systems (MCS) Cote D’Ivoire Satellite Image 

分 类 号：O42[理学—声学]