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The Relationship Analyses between High Concentration Ozone and Local Wind Circulation in Mexico City
장유운,이강웅,김영성,이태형,박일수,Jeffrey Scott Owen 한국외국어대학교 중남미연구소 2019 중남미연구 Vol.38 No.1
In this study, we investigated the spatial and temporal patterns in ozone concentrations in Mexico City using a data set of meteorological characteristics and measured air pollutant concentrations from the RAMA (Red Automática de Monitoreo Atmosférico) for January 2011 to December 2013. The results showed that ozone in Mexico City was formed most actively from April to May when humidity is lowest. We also investigated related meteorological characteristics such as the wind direction during day and night, which were generally northerly. The mean wind speed during the study period was 1.5 m/s early in the morning which the air pollutants can be stagnated and 3.5 m/s in the late afternoon that pollutants can be transported outward the Mexico City. Ozone concentrations increased from the leeward area of central Mexico City. In the southwestern area of Mexico City, elevated ozone concentrations were also measured together with elevated VOC concentrations. In central Mexico City and most of the northern industrial complex, the weekend effect in ozone concentrations was observed except near the southwest residential area where higher ozone concentrations occurred. Based on the local scale vector field, the higher ozone concentrations were occurred during the prevailing northerly wind as the wind was converged into the suburban and southern area. The patterns identified in this study highlight the urgent need for a comprehensive approach of policies designed to reduce ozone in the southwestern residential area of Mexico.
The Relationship Analyses between High Concentration Ozone and Local Wind Circulation in Mexico City
Jang, Yu-Woon(장유운),Lee, Gangwoong(이강웅),Ghim, Young-Sung(김영성),Lee, Taehyoung(이태형),Park, Il-Soo(박일수),Jeffrey Scott Owen 한국외국어대학교 중남미연구소 2019 중남미연구 Vol.38 No.1
본 연구는 멕시코시티 지역에서 기상적 영향에 따른 오존의 시•공간 특성을 알아보고자 하였다. 멕시코시티에서 고농도 오존은 습도가 가장 낮은 4월과 5월에 발생하였으며, 주로 북풍의 영향을 받았다. 연구기간 동안 도심의 시간별 평균 풍속은 아침에 1.5 m/s로 낮아서 오염물질의 정체 조건인 반면, 오후에는 3.5 m/s로 도심 외부로 오염물질의 유출이 가능하였다. 오존 농도는 멕시코시티의 도심지역에서 동남쪽 주변부로 증가하는 특성을 나타내었다. 지역 규모의 바람장에서도 북풍이 주풍향일 때 바람이 남부 지역에 수렴하게 됨으로써 고농도 오존이 발생하는 것으로 모사되었다. 기상적 영향과 함께 남부 지역에서는 오존 생성의 전구물질인 휘발성유기화합물 농도 또한 다른 지역에 비하여 높게 관측됨으로써 멕시코시티의 오존은 기상요소와 인위적 오염물질의 복합적 영향에 기인하는 것으로 평가된다. In this study, we investigated the spatial and temporal patterns in ozone concentrations in Mexico City using a data set of meteorological characteristics and measured air pollutant concentrations from the RAMA (Red Automática de Monitoreo Atmosférico) for January 2011 to December 2013. The results showed that ozone in Mexico City was formed most actively from April to May when humidity is lowest. We also investigated related meteorological characteristics such as the wind direction during day and night, which were generally northerly. The mean wind speed during the study period was 1.5 m/s early in the morning which the air pollutants can be stagnated and 3.5 m/s in the late afternoon that pollutants can be transported outward the Mexico City. Ozone concentrations increased from the leeward area of central Mexico City. In the southwestern area of Mexico City, elevated ozone concentrations were also measured together with elevated VOC concentrations. In central Mexico City and most of the northern industrial complex, the weekend effect in ozone concentrations was observed except near the southwest residential area where higher ozone concentrations occurred. Based on the local scale vector field, the higher ozone concentrations were occurred during the prevailing northerly wind as the wind was converged into the suburban and southern area. The patterns identified in this study highlight the urgent need for a comprehensive approach of policies designed to reduce ozone in the southwestern residential area of Mexico.