Search Results 1-10 of 10

  • Relation of Convective Bursts to Changes in the Intensity of Typhoon Lionrock (2016) during the Decay Phase Simulated by an Atmosphere-Wave-Ocean Coupled Model

    WADA Akiyoshi , OYAMA Ryo

    … One of the intriguing events was consecutive deep convections (convective bursts, CBs) occurred before making landfall on 31 August. …

    Journal of the Meteorological Society of Japan. Ser. II 96(6), 489-509, 2018


  • Why Torrential Rain Occurs on the Western Coast of Sumatra Island at the Leading Edge of the MJO Westerly Wind Bursts

    Wu Peiming , Ardiansyah Dodi , Yokoi Satoru , Mori Shuichi , Syamsudin Fadli , Yoneyama Kunio

    … Radar observations revealed that a convergence and convective cloud merger of mesoscale convective systems from an eastward propagating MJO and westward moving diurnal convection over the western coast of the island was the immediate cause of the torrential rain. …

    SOLA 13(0), 36-40, 2017


  • Intensification of Typhoon Danas (1324) Captured by MTSAT Upper Tropospheric Atmospheric Motion Vectors

    Oyama Ryo , Wada Akiyoshi , Sawada Masahiro

    … The evolution of the wind field around the cloud top captured by the AMVs revealed two remarkable features: increases of radial outflow, representing secondary circulation in the form of the two convective bursts (CBs), and increases of tangential winds after the first CBs and during the second CBs. …

    SOLA 12(0), 135-139, 2016


  • The Impact of Trade Surges on the Madden-Julian Oscillation under Different ENSO Conditions

    Seiki Ayako , Takayabu Yukari N. , Yoneyama Kunio , Shirooka Ryuichi

    … Although convective activities are centered south of the equator in boreal winter, the moisturization by the surges results in the activation of MJO convection not only south of the equator but also north of the equator, facilitating the formation of the twin cyclonic disturbances straddling the equator. … It has been shown in previous studies that these twin cyclonic disturbances produce westerly wind bursts, which can trigger El Niño. …

    SOLA (6), 49-52, 2010


  • Radial Transport Characteristics of Fast Ions Due to Energetic-Particle Modes inside the Last Closed-Flux Surface in the Compact Helical System

    Kenichi Nagaoka , Mitsutaka Isobe , Kazuo Toi , Akihiro Shimizu , Akihide Fujisawa , Shunsuke Ohshima , Haruhisa Nakano , Masaki Osakabe , Yasushi Todo , Tsuyoshi Akiyama , Yoshihiko Nagashima , Chihiro Suzuki , Shin Nishimura , Yasuo Yoshimura , Keisuke Matsuoka , Shoichi Okamura

    … The internal behavior of fast ions interacting with magnetohydrodynamic bursts excited by energetic ions has been experimentally investigated in the compact helical system. … The resonant convective oscillation of fast ions was identified inside the last closed-flux surface during an energetic-particle mode (EPM) burst. …

    Physical Review Letters (Vol.100), 065005-1 - 065005-4, 2008-02-01


  • Multi-Scale Convective Systems during the Initial Phase of the 1986/87 El Niño

    Nitta Tsuyoshi , Mizuno Takanori , Takahashi Kiyotoshi

    … Temporal and spatial characteristics of tropical convective systems and their associated atmospheric circulations such as intraseasonal variations (ISV), super cloud clusters (SCC), twin cyclones and westerly wind bursts (WWB) developed during the initial phase of the 1986/87 El Niño are investigated.<br>Most ISVs originated in the Indian Ocean and propagated eastward through the western Pacific and consisted of SCCs, twin cyclones and WWBs. …

    Journal of the Meteorological Society of Japan. Ser. II 70(1B), 447-466, 1992


  • Westerly Wind Bursts and Surface Heat Fluxes in the Equatorial Western Pacific in May 1982

    Chu Pao-Shin , Frederick James

    … This paper presents a case study of westerly wind bursts in the equatorial western Pacific (EWP) during May 1982. … The imposed zonal pressure distribution there greatly enhanced the otherwise slack background pressure gradient in the EWP and thus favored westerly wind bursts. … Deep convective clouds were sometimes found east of strong westerlies. …

    Journal of the Meteorological Society of Japan. Ser. II 68(5), 523-537, 1990


  • Dynamics of Super Cloud Clusters, Westerly Wind Bursts, 30-60 Day Oscilations and ENSO: An Unified View

    Lau K.-M. , Li Peng , Sui C.H. , Nakazawa Tetsuo

    … In this paper we present results of several preliminary numerical experiments to study the mechanism of the observed variabilities in wind and convection associated with super cloud clusters(SCC), westerly wind bursts and 30-60 day oscillations in the western Pacific region. … During its development stage, the SCC is accompanied by convective clusters moving in opposite direction(westward) to the SCC. …

    Journal of the Meteorological Society of Japan. Ser. II 67(2), 205-219, 1989


  • Development of a Twin Cyclone and Westerly Bursts during the Initial Phase of the 1986-87 El Nino

    Nitta Tsuyoshi

    Convective activity, low-level winds and sea surface temperature associated with a twin cyclone developed in tropical western Pacific during May 1986 were analyzed in connection with the initiation of the 1986-87 El Nino. … The westerly bursts over the equator were greatly intensified, corresponding to the development of the twin cyclone resulting in an eastward expansion of the warm surface water toward the dateline. …

    Journal of the Meteorological Society of Japan. Ser. II 67(4), 677-681, 1989


  • Abrupt Enhancement of Convective Activity and Low-Level Westerly Burst during the Onset Phase of the 1986-87 El Niño

    Nitta Tsuyoshi , Motoki Toshihiro

    … This note demonstrates the observational evidence of abrupt enhancement of convective activities and simultaneous low-level westerly bursts which occurred in the equatorial western Pacific in November of 1986. … These abrupt changes were followed by the eastward movement of the convective systems and low-level westerlies to the east of the dateline resulting in the development of the 1986-87 El Niño. …

    Journal of the Meteorological Society of Japan. Ser. II 65(3), 497-506, 1987


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