A Study on the 3-dimensional Material Transport Structure Between the Stratosphere and the Troposphere in the Extratropics.

温带平流层与对流层之间的三维物质输运结构研究。

基本信息

批准号：
08454125
负责人：
YAMAZAKI Koji
金额：
$ 4.48万
依托单位：
HOKKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

The air entered from the troposphere to the stratosphere in the equatorial region moves toward extratropical stratosphere and returned into the troposphere in the extratropics. This circulation is important for determining ozone and water vapor distribution. These gases are essential for heat balance in the stratosphere. Under this project the understanding of the climatology and the seasonal variation of meridional circulation is greatly improved. The following are major results obtained in this project.From the vertical profiles of tracer constituents observed by the UARS satellite, the wintertime downward velocity in the Antarctic polar vortex is estimated. Also, the upward velocity in the equatorial region associated with the QBO is estimated and the phase relation between the vertical motion and the temperature is shown. Using the objective analysis data, the reverse circulation in the subtropical region associated with the QBO is shown for the first time. Also, the global circulation change after the Pinatubo eruption and the seasonal variation of downward motion in the polar regions are quantitatively obtained. It is shown that the stratospheric fountain hypothesis is not needed. The summer weather regime is analysed over the north Atlantic region. The circulation and water vapor distribution of an idealized middle atmosphere is studied.The last two points are indirect to the research theme, but' the interesting results are obtained. The 3-dimensional structure has not been clarified yet and the modeling study is not completed. However, this project is a stating point of this subject. Further study is expected.

从对流层进入赤道区域的平流层的空气朝着热带平流层移动，并返回在热带地区的对流层中。该循环对于确定臭氧和水蒸气分布很重要。这些气体对于平流层中的热平衡至关重要。在这个项目下，对气候学和子午循环的季节变化的理解大大提高了。以下是该项目中获得的主要结果。从UARS卫星观察到的示踪剂成分的垂直剖面，估计南极极性涡流的冬季向下速度。同样，估计与QBO相关的赤道区域的向上速度，并显示垂直运动与温度之间的相位关系。使用客观分析数据，首次显示与QBO相关的亚热带区域的反向循环。同样，在极地区域的Pinatubo爆发和向下运动的季节性变化后，全球循环变化也得到了定量获得的。结果表明，不需要平流层喷泉假设。夏季天气制度在北大西洋地区进行了分析。研究了理想化的中间气氛的循环和水蒸气分布。最后两个点间接地与研究主题相关，但获得了有趣的结果。三维结构尚未澄清，建模研究尚未完成。但是，这个项目是这个主题的指示。预计会进一步研究。