2013 Fiscal Year Final Research Report
Micro-barometric variation which starts just before strong precipitation
| Project/Area Number |
24654152
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Meteorology/Physical oceanography/Hydrology
|
|---|
| Research Institution | Kyoto University |
|---|
Principal Investigator |
IYEMORI TOSHIHIKO 京都大学, 理学(系)研究科(研究院), 教授 (40144315)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
HAYASHI Taiichi 京都大学, 防災研究所, 准教授 (10111981)
SANO Yasuharu 朝日大学, 経営学部, 准教授 (50257531)
|
|---|
| Project Period (FY) |
2012-04-01 – 2014-03-31
|
| Keywords | 気象 / 微気圧変動 / 重力音波 / 降雨 / 重力波 |
|---|
| Research Abstract |
A micro-barometric phenomenon, where the pressure starts to increase just before (i.e., one or two minutes) the start of rainfall on the ground and acoustic (or internal) gravity wave is triggered, has been confirmed by the observations with high-time resolution observations conducted in this research project. The one second resolution micro-barometric, rainfall, wind velocity and BS channel radio wave absorption data have been obtained and analyzed. The pressure increase just before the strong precipitation suggests that the rain drops push the air downward and the pressure increase propagates to the ground as the acoustic waves before the rain drops reach the ground and observed as a precipitation.
|
