权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Stratosphere-troposphere coupling inferred from the space-time variation of minor constituents

从次要成分的时空变化推断平流层-对流层耦合

基本信息

批准号：
11219201
负责人：
SHIOTANI Masato
金额：
$ 29.06万
依托单位：
Kyoto University (2001-2002)Hokkaido University (1999-2000)
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：
1999
资助国家：
日本
起止时间：
1999 至 2002
项目状态：
已结题

项目摘要

This research program was intended to investigate the stratosphere-troposphere exchange processes based on complementary use of the global and station data, and numerical model output. Special attention was paid to the ozone and water vapor distributions in the tropical tropopause region where dynamical, radiative and chemical interactions of these minor species on the climate is crucial. In addition, we have performed 18 campaign observations of ozone and water vapor sondes in the eastern, central and western Pacific to fill the gap of data sparse regions around the equator. At the same time we had been testing and improving a commercial chilled-mirror hygrometer, so called "Snow White", in collaboration with foreign investigators. The main part of our research activity is summarized in the following.1) Our water vapor sonde observations first revealed the seasonally and locality of water vapor profiles in the tropical tropopause region (Voemel et al., 2002).2) It is suggested using water vapor observations in the eastern Pacific that the equatorial Kelvin wave may control a water vapor entry value into the stratosphere (Fujiwara et al., 2001).3) On the basis of the global analysis data and general circulation model output the ENSO-related signals in temperature and upward velocity in the equatorial tropopause were detected and discussed (Hatsushika and Yamazaki, 2001).4) We have conducted ozonesonde observations on board the research vessel "Shoyo-Maru" and found several characteristic features in the equatorial eastern Pacific (Shiotani et al., 2002).5) We have made several intercomparison campaigns with other water vapor sensors and evaluated their performance (Fujiwara et al., 2003 ; Voemel et al., 2003).

该研究计划的目的是在全球和台站数据以及数值模式输出的互补使用的基础上调查平流层-对流层交换过程。特别注意热带对流层顶区域的臭氧和水汽分布，在该区域，这些次要物种的动力学、辐射和化学相互作用对气候至关重要。此外，我们还在东、中、西太平洋进行了18次臭氧和水汽探测活动，以填补赤道附近资料稀疏地区的差距。与此同时，我们一直在与外国研究人员合作，测试和改进一种商用冷镜湿度计，即所谓的“雪白色”。我们的研究活动的主要部分总结如下：1）我们的水汽探空观测首次揭示了热带对流层顶地区水汽廓线的季节性和局部性（Voemel等人，2002年）。2）使用东太平洋的水汽观测表明，赤道开尔文波可能控制进入平流层的水汽进入值（Fujiwara等人，2001年）。3）根据全球分析资料和大气环流模式输出，检测并讨论了赤道对流层顶温度和上升速度的ENSO相关信号（Hatsushika和Yamazaki，2001年）。4）我们在研究船“Shoyo-Maru”上进行了臭氧探空仪观测，发现了赤道东太平洋的几个特征（Shiotani et al.，2002）。5）我们已经与其他水蒸气传感器进行了几次相互比较，并评估了它们的性能（Fujiwara等人，2003 ; Voemel等人，2003年）。