Coupling Processes in the Equatorial Atmosphere

赤道大气中的耦合过程

• 批准号: 13136202
• 负责人: FUKAO Shoichiro
• 金额: $ 16.96万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13136202/
• 关键词: Equatorial Atmosphere; Global observation; Remote Sensing; Upper-Atomospheric Phisics; International collaboration; Campaign observation; Equatorial Atmosphere Radar(EAR); Radar network; 大気・超高層物理学

The Indonesian Archipelago is one of the centers of intense atmospheric motions over the globe. The mechanisms of these atmospheric motions and their changes, however, have not yet been made clear due to the sparseness of observational data in that region. The Coupling Processes in the Equatorial Atmosphere (CPEA), a six-year research project of Japan, was conducted in Indonesia to observationally elucidate dynamical and electrodynamical coupling processes occurring in the equatorial atmosphere from September 2001 to March 2007. During six years of CPEA, a new Equatorial Atmosphere Observatory was established with the Equatorial Atmosphere Radar (EAR) as the core facility in Kototabang, West Sumatra, Indonesia (0.20??S, 100.32??E). In the present talk we will review some highlights from this project. First, it has been found, contrary to the traditional expectation, that deep convection over Sumatra Island is observed in inactive phase of Madden-Julian Oscillation (MJO), while shallow convection is dominant in active phase. Secondly, clear correlation between deep convection and enhanced inertia gravity waves with period 2-3days was found with their wave source identified as slowly eastward advecting convection. Thirdly, Kelvin waves with periods 10-12 days near the tropopause and 5.5-8 days in the lower stratosphere were detected locally overIndonesia and globally by CHAMP-GPS. Fourthly, several pieces of evidence have been provided to demonstrate that long-term variability in the troposphere influences the dynamics of the mesopause-homopause region. Finally, it has been suggested that gravity waves near 100 km in altitude contribute to generation of plasma bubbles.

印度尼西亚群岛是全球剧烈大气运动的中心之一。然而，由于该地区观测数据的稀疏，这些大气运动及其变化的机制尚未明确。日本的赤道大气耦合过程（CPEA）是一个为期六年的研究项目，在印度尼西亚进行，旨在通过观测阐明2001年9月至2007年3月赤道大气中发生的动力和电动耦合过程。在CPEA的六年期间，在Kototabang建立了一个以赤道大气雷达（EAR）为核心设施的新赤道大气观测站， 印度尼西亚西苏门答腊岛（南纬 0.20°，东经 100.32°）。在本次演讲中，我们将回顾该项目的一些亮点。 First, it has been found, contrary to the traditional expectation, that deep convection over Sumatra Island is observed in inactive phase of Madden-Julian Oscillation (MJO), while shallow convection is dominant in active phase.其次，深层对流与周期为2-3天的增强惯性重力波之间存在明显的相关性，其波源被确定为缓慢向东的平流对流。第三，CHAMP-GPS 在印度尼西亚上空和全球范围内检测到对流层顶附近周期为 10-12 天、平流层下层周期为 5.5-8 天的开尔文波。第四，已经提供了一些证据来证明对流层的长期变化影响中层顶-同层顶区域的动态。最后，有人提出，高度接近 100 公里的重力波有助于等离子体气泡的产生。

项目成果

Fine structure of vertical motion in the stratiform precipitation region observed by a VHF Doppler radar installed in Sumatra 、 Indonesia

安装在印度尼西亚苏门答腊岛的 VHF 多普勒雷达观测到的层状降水区垂直运动的精细结构

• 发表时间: 2007
• 期刊: J. Applied Meteor. Climatology 46
• 作者: 西憲敬;山本真之;下舞豊志;濱田篤;深尾昌一郎
• 通讯作者: 深尾昌一郎

Gravity wave momentum flux in the upper mesosphere derived from OH airglow imaging measurements

• DOI: 10.1186/bf03352703
• 发表时间: 2007-06
• 期刊: Earth, Planets and Space
• 作者: Shin‐ichi Suzuki;K. Shiokawa;Y. Otsuka;T. Ogawa;M. Kubota;M. Tsutsumi;Takuji Nakamura;D. Fritts

Equatorial Atmosphere Radar observations of short vertical wavelength gravity waves in the upper troposphere and lower stratosphere region induced by localized convection

• DOI: 10.1029/2006gl027026
• 发表时间: 2006-10
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: S. Dhaka;M. Yamamoto;Y. Shibagaki;H. Hashiguchi;S. Fukao;H. Chun

Application of GPS RO data for the studies of atmosphere dynamics

GPS RO数据在大气动力学研究中的应用

• 发表时间: 2007
• 作者: Kanda M.;T. Tsuda
• 通讯作者: T. Tsuda

Gravity wave momentum fulx in the upper mesosphere derived from OH airglow imaging measurements

由 OH 气辉成像测量得出的上层中间层重力波动量通量

• 发表时间: 2007
• 期刊: Earth Planets Space
• 影响因子: 3
• 作者: S. Suzuki;K. Shiokawa;Y. Otsuka;T. Ogawa;M. Kubota;M. Tsutsumi;T. Nakamura;and D. C. Fritts
• 通讯作者: and D. C. Fritts