Generation Mechanism, Structure and Dynamics of Violent Vortices in the Atmospheric Boundary layer and their Roles in Turbulent Transport
| Project/Area Number |
21340134
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Meteorology/Physical oceanography/Hydrology
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
NIINO Hiroshi 東京大学, 大気海洋研究所, 教授 (90272525)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
IGA Keita 東京大学, 大気海洋研究所, 准教授 (60292059)
|
|---|
| Project Period (FY) |
2009 – 2011
|
| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2011: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2010: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2009: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
|
|---|
| Keywords | 気象学 / 対流混合層 / 大気境界層 / ラージ・エディ・シミュレーション / 渦 / 塵旋風 / 竜巻 / 回転境界層 / 蒸気旋風 / 室内実験 |
|---|
| Research Abstract |
Generation mechanisms, structures and dynamics of dust devils, steam devils and tornadoes are studied. Dust devils are formed when circulation about the vertical axis, which is generated at mid-levels in a convective mixed layer, is transported by downdrafts toward low-levels, and then to updraft regions while nearly conserving the angular momentum. Steam devils in a moist convective mixed layer without precipitation develop in a similar way to dust devils. Those with precipitation, however, are caused by collisions of boundaries of cold pools from precipitating area. Radial distribution of tangential velocity in these strong vortices is found to have two different regimes which are dominated by the dynamics of a rotating boundary layer.
|
Report
(4 results)
Research Products
(81 results)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Book] 風の事典2011
Author(s)
真木太一、新宏、野村卓史、林陽生、山川修治
Total Pages
276
Publisher
丸善
Related Report
-
[Book] 風の事典2011
Author(s)
真木太一、新野宏、野村卓史、林陽生、山川修治
Total Pages
276
Publisher
丸善
Related Report
-
-
