Cooperative Observation of Equatorial Atmosphere Dynamics

赤道大气动力学合作观测

• 批准号: 07044082
• 负责人: TSUDA Toshitaka
• 金额: $ 16.13万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07044082/
• 关键词: equatorial atmosphere; cumulus convection; boundary layr radar; meteor radar; tropopause; Kelvin wave; Indonesia region; atmospheric wave; semi-annual oscillation; 超高層物理学; リモートセンシング; 大気境界層

This research project is devoted to the study of cumulous convection and atmospheric waves in the equator by the observations carried out in equatorial Indonesia under cooperations between Japan, Indonesia and Australia.Near Jakarta, in Jawa Island, a boundary layr radar and a meteor radar, which were installed in 1992, were continuously operated and the winds and turbulences below 5km altitude and wind velocities and temperature fluctuations at 70-110km altitudes have been recorded. At Bandung, Jawa, radiosondes were launched every day in order to observe wind, temperature and humidity up to 35km in the troposphere and stratosphere. At Pontianak in Kalimantan Island, New MF radar was built and operated since November 1995, which can observe winds at 70-100km altitudes. Simultaneous radiosonde and MF radar observation was carried out at Pontianak in a rainy season, in order to measure the dynamics throughout the troposphere and the middle atmosphere, simultaneously.Below 2km, good agre … More ement between radar wind and objective analysis was found. Frequency spectrum of wind fluctuation has smaller slope than that in mid-latitudes. Strong 10 day and 4 day oscillations were found in zonal and meridional wind component, respectively. Modeling of boundary layr dynamics was also successful which accounts for the observed characteristics. Near the tropopause, strong activity of the Kelvin waves was detected with significant modification of tropopause heights, which suggests troposphere/stratosphere exchange by the equatorial waves. In the mesosphere, quasi-biennial variability of MSAO (mesospheric semi-annual oscillation) and diurnal tides have been clearly recognized. Significant 2-day and Kelvin waves were observed and global structures have been studied, which indicates significant momentum fluxes of these waves in the equator. All these results clarified that the activity of the equatorial troposphere significantly drives the general circulation in the middle atmosphere, which affects the global environmental changes. Less

这个研究项目是通过日本、印度尼西亚和澳大利亚合作在印度尼西亚赤道地区进行的观测，专门研究赤道地区的累积对流和大气波，在雅加达附近的爪哇岛，1992年安装了一个边界层雷达和一个流星雷达，连续运行，并记录了5 km以下的风和风速，以及70- 110 km高度的风速和温度波动。在贾瓦的万隆，每天发射无线电探空仪，以观测对流层和平流层高达35公里的风、温度和湿度。在加里曼丹岛的坤甸，新的MF雷达自1995年11月开始建造和运行，可以观测70- 100公里高度的风。为了同时测量对流层和中层大气的动力学，我们在一个雨季在坤甸进行了探空和中频雷达的同时观测。 ...更多信息 雷达测风与客观分析结果一致，风脉动频谱比中纬度地区的风脉动频谱斜率小。纬向风分量和纬向风分量分别有10天和4天的强烈振荡。边界层动力学的建模也是成功的，这说明了所观察到的特征。在对流层顶附近，Kelvin波的强烈活动被检测到对流层顶高度的显著修改，这表明赤道波的对流层/平流层交换。在中间层，MSAO（中间层半年振荡）和日潮汐的准两年变率已被清楚地认识到。观测到显著的2日波和开尔文波，并对全球结构进行了研究，这表明这些波在赤道有显著的动量通量。这些结果表明，赤道对流层的活动对中层大气环流有重要的驱动作用，并对全球环境变化产生影响。少

项目成果

T.Tsuda: "Observations of diurnal oscillations with a meteor wind radar and radiosondes in Indonesia" J.Geophys.Res. (印刷中).

T.Tsuda：“印度尼西亚流星风雷达和无线电探空仪的昼夜振荡观测”J.Geophys.Res（出版中）。

D.Riggin: "Radar observations of a 3-day kelvin wave in the equatorial Mesosphere" J.Geophys.Res. (印刷中).

D. Riggin：“赤道中间层 3 天开尔文波的雷达观测”J. Geophys（正在出版）。

H.Hashiguchi: "Diurnal variations of the planetary boundary layer observed with an L-band clear-air Doppler radar" Boundary Layer Meteorol. 74. 419-424 (1995)

H.Hashiguchi：“用 L 波段晴空多普勒雷达观察到的行星边界层的日变化”边界层气象。

H.Hashiguchi: "Boundary layr radar observations of the passage of the convection center over Serpong, Indonesia (6ﾟS,107ﾟE) during the TOGA-COARE intensive observation period" J.Meteorol.Soc.Japan. 73. 535-548 (1995)

H.Hashiguchi：“TOGA-COARE 密集观测期间对印度尼西亚塞尔蓬 (6ﾟS，107ﾟE) 对流中心通过的边界层雷达观测”J.Meteorol.Soc.Japan 73. 535-。 548 (1995)

H.Hashiguchi: "Observations of the planetary boundary layer over equatorial Indonesia with an L-band clear-air Doppler radar:Initial results" Radio Sci. 30. 1043-1054 (1995)

H.Hashiguchi：“用 L 波段晴空多普勒雷达对印度尼西亚赤道上空的行星边界层进行观测：初步结果”Radio Sci。