Understanding of meteorological characteristics in mountains and mountainous fogs and their impacts of subalpine forests

认识山地、山雾的气象特征及其对亚高山森林的影响

基本信息

批准号：
16208016
负责人：
OHTA Takeshi
金额：
$ 32.12万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2007
项目状态：
已结题

项目摘要

Meteorological conditions, chemical properties and stable isotope of atmospheric vapor were measures in Mt Norikura and Mt. Hachimantai to understand mountain fogs, e.g. radiation fog and amending fog, and its vapor source qualitatively The followings are new interpretations obtained from this project.Diurnal variation of meteorological variables, especially an elapse rate of air temperature, atomospheric vapor deficit and wind direction, were quite different in days when radiation fog and amending fog appeared from in non-foggy days. This result showed that appearance of mountain fogs required a strong local circulation It was shown from the stable isotope analyses that a part of ascending fogs consisted of water vapor which was stored in the bottom of a basin. Water vapor budget analyses showed that major sources of water vapor were the advection at a mouth of watershed and evapotranspiration from surface. And water vapor evaporated and/or transpired from the surface occupied about 5-70 % of total water vapor in the basin.Wetting duration of trees except for rainfall events reached to about 15 % of observation periods and condensation on trees occurred in early morning.Physiological properties were measured under a single or a coupled stresses from exposures of acid kg and atone, and drought Several changes of physiological properties are occurred and these phenomena will results from ozone exposure and drought stress rather than acid fogs.

大气蒸气的气象条件，化学特性和稳定的同位素是Mt Norikura和Hachimantai山的措施，以了解山雾，例如辐射雾和修改雾，及其蒸气来源质量上是从该项目获得的新解释。气象变量的二级变化，尤其是空气温度的延伸速率，原子能蒸气不足和风向，在辐射雾中出现在非燃料时代的雾气时，几天就大不相同。该结果表明，山雾的出现需要强烈的局部循环，从稳定的同位素分析中表明，升至的一部分由水蒸气组成，该水蒸气存储在盆地的底部。水蒸气预算分析表明，主要水蒸气的主要来源是流域口和从表面蒸散的对流。 And water vapor evaporated and/or transpired from the surface occupied about 5-70 % of total water vapor in the basin.Wetting duration of trees except for rainfall events reached to about 15 % of observation periods and condensation on trees occurred in early morning.Physiological properties were measured under a single or a coupled stresses from exposures of acid kg and atone, and drought Several changes of physiological properties are occurred这些现象将来自臭氧的暴露和干旱胁迫而不是酸雾。