| 분류 | 논문 |
|---|
| 학술지 구분 | 등재 |
|---|
| 저서명 | Micrometeorological Characteristics in the Atmospheric Boundary L ayer in the Seoul Metropolitan Area during High-Event and Non-event Days |
|---|
| 저자 | 장유운 |
|---|
| 참여구분 | 공동 |
|---|
| 저자수 | 4 |
|---|
| 학술지명 | 한국환경공학회지 |
|---|
| 발행처 | 한국환경공학회 |
|---|
| 게재일 | 2020-12-31 |
|---|
| 초록 | This study focused on comparing the meteorological conditions in the Atmospheric Boundary L ayers (ABL) on high-event days and non-event days in the Seoul Metropolitan Area (SMA). We utilized observed PM10 and meteorological variables at the surface as well as at the upper heights. The results showed that high-event days were consistently associated with lower wind speed, whereas wind direction showed no particular difference between high-event and non-event days with frequent westerlies and northwesterlies for both cases. During high-event days, the temperature was much warmer than the monthly normal values with a sharp increasing trend, and Relative Humidity (RH) was higher than the monthly normal, especially on high-event days in February. During high-event days in spring, a double inversion l ayers was present at surface and upper heights. This indicates that stability in the multi-l ayer is an important indicator of higher PM10 concentrations. Net radiation in spring and winter is also closely associated with higher PM10 concentrations. Strong net radiation resulted in large sensible heat, which in turn facilitated a deeper mixing height with diluted PM10 concentrations; in contrast, PM10 concentrations were higher when sensible heat in spring and winter was very low. We also confirmed that convective and friction velocity was higher on non-event days than on high-event days, and this was especially obvious in spring and winter. This indicated that thermal turbulence was dominant in spring, whereas in winter, mechanical turbulence was dominant over the SMA. |
|---|
|
첨부파일:
첨부파일이 없습니다.
