Visualization of Peculiar Dynamics of Surfacre Atmosphere and Gas and its mechanism

2022 Fiscal Year Final Research Report

• Project/Area Number: 19H02383
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 25020:Safety engineering-related
• Research Institution: Chiba University
• Principal Investigator: Shiina Tatsuo 千葉大学, 大学院工学研究院, 准教授 (80304187)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: LEDライダー / 表層大気 / ガス / 挙動 / インタラクション / 可視化

Outline of Final Research Achievements

This study has been conducted with the purposes to visualize peculiar dynamics of surface atmosphere and gas and to clear its mechanism. The LED lidar had its function of Mie scattering light, Raman scattering light and polarized light measurements. Those LED lidars were used synchronously, and observed dust flow quantitatively and sea wave dynamics.
This study could achieve their visualization successfully. We developed a new pulse oscillation circuits for LED lidar. Its potential is quite high because of higher optical power of >10W and short pulse width of <1ns. Those achievements will be succeeded to the next study subject (Grant-in Aid for Scientific Research B) for turbulent field monitoring of surface atmosphere and gas.

Free Research Field

光電計測

Academic Significance and Societal Importance of the Research Achievements

表層大気・ガスはそれ自身がセル（空気だまり）として移動する際、地形や地表面状況、構造物等によってその挙動は強く影響を受ける。同時に温湿度や風、気圧、日射等の気象因子にも表層大気の挙動は大きく反映される。砂面や海表面のように砂塵や波浪が生じるような場合、表層大気とのインタラクション（相互作用）はさらに複雑さを増し、風を含む大気が砂塵や波浪を牽引するのか、砂塵や波浪が大気を牽引するのか、状況によって異なる現象を生じる。表層大気と地表面・海表面との動的インタラクションの解明は物質境界での現象把握による関心が高く、境界層での物質拡散、輸送、及びそれらへの地形・気象因子の効果といった観点が興味深い。