查詢結果分析
來源資料
相關文獻
- 水平傳送對大臺北地區光化生成臭氧的影響研究
- Experimental and Numerical Simulation of Soil Response Under Earthquake Loading for Uniform Sand Layer
- 二維與三維水理數值模式在淡水河口海域之應用與比較
- 非靜力氣象數值模式的發展
- Determination of Governing Equations of Groundwater Flow and Solute Transport from the Hydrogeologic Conceptual Model
- Method of Solving Moist Thermodynamic Equations in NTU-Purdue Non-hydrostatic Model and Tests on 2D Moist Mountain Waves
- 三維不可壓縮黏性流數值模式發展與應用
- 中尺度數值模式之發展與航空氣象相關性研究
- 數值模式對梅雨鋒面系統模擬之分析
- 波浪力對海域結構物影響之數值方法研究
頁籤選單縮合
題名 | 水平傳送對大臺北地區光化生成臭氧的影響研究 |
---|---|
作者姓名(中文) | 柳中明; | 書刊名 | 大氣科學 |
卷期 | 21:1 1993.03[民82.03] |
頁次 | 頁1-22 |
分類號 | 328.2 |
關鍵詞 | 臭氧光化反應; 數值模式; Ozone production and simulation; |
語文 | 中文(Chinese) |
中文摘要 | 本文延續柳(1992)的研究,採用數值模式,以分析水平風場傳送對臺北地區近地面臭氧時空變化的影響。經詳細分析後,發現南北(Y軸)方向上風場傳送,主要影響各區污染物濃度之絕對值變化;而東西(X軸)方向上風場傳送,主要影響各污染物逐時變化特徵。將X、Y軸風場傳送均考慮後,本模式順利模擬出南區午時O₃濃度最高,次為中區,最低在北區的實測現象。同時午時高臭氧濃度在離地約0.8 KM附近,亦與板橋臭氧剖面觀測相似,且午時臭氧為一日中最高濃度。日落後50公尺以上,因輻射冷卻逆溫層的出現,而致臭氧累積的情形,亦因水平風傳送而減緩,但仍維持50公尺以上臭氧濃度較高的現象。此高層臭氧可能在日出後,因為輻射冷卻逆溫層的被破壞,而向下傳送至近地面,加速近地面臭氧生成與累積。總結而言,本文所採用之模式,較之於複雜之三維模式,為非常簡易,但已能模擬出實測的各種現象,更且可用以分析垂直熱力紊流擴散、水平傳送、化學反應,日出前高層臭氧等,對近地面臭氧累積之影響。不過,仍無法用以分析海陸風環流所造成的垂直方向傳輸情形。 |
英文摘要 | This paper continues the study by Liu (1992) and applies a numerical model to study the effect of horizontal transport on the temporal and spatial distribution of surface ozone in Taipei. The results show that the airflow along the north-south direction (Y-axis) have a significant effect on the noontime maximum ozone level, whereas the airflow along the east-north direction (X-axis) have a direct effect on the temporal variation of ozone. After including the transport effect into our simplified model, we can simulate the observed phenomenon of a highest noontime ozone amount at southern Taipei region and a lowest concentration at northern region. Meanwhile, the peak ozone level along the vertical direction is at about 800m above the ground, which is quite similar to what have been observed by the Central Weather Bureau at Panchiao. After sunset, there is some accumulation of ozone above 50m height, just above the inversion layer formed b by the radiative cooling effect. The accumulated ozone can be transported downward to surface after sunrise when the nighttime inversion layer breaks, and then enhance the production of ozone. In short, the current model provides us an opportunity to analyze the effects of turbulence, transport, chemical reactions, and initial ozone profile on the surface ozone accumulation. However, it can not resolve the vertical structure formed by a pronounced land-sea breeze circulation. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。