Modification of equatorial disturbances over Indonesia maritime continent and its climatological significance

印度尼西亚海洋大陆赤道扰动的修正及其气候意义

基本信息

批准号：
13440141
负责人：
YAMANAKA Manabu d.
金额：
$ 7.94万
依托单位：
Kobe University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

项目摘要

The objective of this study was to clarify the modification and re-organization of equatorial convective cloud disturbances over the Indonesia maritime continent between Indian and Pacific Oceans. We did (i) establishment of study infrastructure, (ii) construction of database, (iii) analysis of convective cloud systems and their organization, and (iv) theoretical consideration on convection system organization.In the first year (FY 2001) we constructed (i) by installing a computer. We collected observational data for (ii), and analyzed them for (iii). We also started to study (iv). In the second year (FY 2002) we compared (ii) with data of satellite observations and objective analysis. Concerning (iii), we found out a giant diurnal cycle of cloud systems over the whole of Sumatera Island : Generation along the central mountain ridge during afternoon and midnight, and movement both westward and eastward until morning. We also found suppression of such a diurnal cycle in a dry phase of infra-seasonal variations (intermediate of super cloud clusters) moving eastward from Indian Ocean. Concerning (iv), we studied the equation system for horizontal convection (or inertio-gravity waves) which describing both local and meridional circulations.In the final year (FY 2003) we complete the study. As for (iii) we found that the diurnal cycle of westward movement appears more frequently (almost throughout a year over the whole of Sumatera Island), whereas the eastward movement is limited inside the inter-tropical convergence zone (ITCZ) shifting north-southward over Sumatera Island with an annual cycle. Concerning (iv) a numerical calculation was also tried to simulate the diurnal cycle of cloud generation and movement.These results were presented in international meetings and journals, and summarized in a report booklet.

这项研究的目的是阐明印度和太平洋之间印度尼西亚海洋大陆上赤道对流云干扰的修改和重组。我们（i）建立了研究基础架构，（ii）数据库的构建，（iii）对流云系统及其组织的分析，以及（iv）对流系统组织的理论考虑。第一年（2001财年），我们构建了（i）安装计算机。我们收集了（ii）的观察数据，并分析了（iii）。我们也开始学习（IV）。在第二年（2002财年），我们将（ii）与卫星观测和客观分析的数据进行了比较。关于（iii），我们发现了整个苏门海岛上的云系统的巨大昼夜周期：在下午和午夜期间沿中央山山脊沿着中央山脊，并向西和向东行动到早晨。我们还发现，在从印度洋向东移动的非季节变化（超级云簇中间体）的干旱阶段中这种昼夜周期的抑制。关于（IV），我们研究了描述局部和子午线循环的水平对流方程系统（或惯性 - 重力波）。在最后一年（2003财年），我们完成了这项研究。至于（iii），我们发现向西运动的昼夜周期更频繁地出现（几乎在整个Sumatera岛上一年），而在热带融合区（ITCZ）内向向北转移的东方运动受到限制在Sumatera岛上，每年周期。关于（iv）还试图模拟数值计算以模拟云产生和运动的昼夜周期。这些结果在国际会议和期刊中提出，并在报告手册中进行了总结。