title: Diurnal variation of surface ozone in mountainous areas: Case study of Mt. Huang, East China.
abstract: To explore the variations in atmospheric environment over mountainous areas, measurements were made from an intensive field observation at the summit of Mt. Huang (30.13°N, 118.15°E, 1841m above sea level), a rural site located in East China, from June to August 2011. The measurements revealed a diurnal change of surface O3 with low concentrations during the daytime and high concentrations during the nighttime. The causes of diurnal O3 variations over the mountain peak in East China were investigated by using a fairly comprehensive WRF-Chem and HYSPLIT4 modeling approach with observational analysis. By varying model inputs and comparing the results to a baseline modeling and actual air quality observations, it is found that nearby ozone urban/anthropogenic emission sources were contributing to a nighttime increase in mountaintop ozone levels due to a regional transport lag and residual layer effects. Positive correlation of measured O3 and CO concentrations suggested that O3 was associated with anthropogenic emissions. Sensitivity modeling experiments indicated that local anthropogenic emissions had little impact on the diurnal pattern of O3. The diurnal pattern of O3 was mainly influenced by regional O3 transport from the surrounding urban areas located 100-150km away from the summit, with a lag time of 10h for transport.
authors: Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric Physics, Nanjing University of Science Information & Technology, Nanjing 210044, China.
authors: Lei
authors: L
authors: Zhang
authors: Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric Physics, Nanjing University of Science Information & Technology, Nanjing 210044, China.
authors: Lianji
authors: L
authors: Jin
authors: Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric Physics, Nanjing University of Science Information & Technology, Nanjing 210044, China. Electronic address: josef_zhao@126.com.
authors: Tianliang
authors: T
authors: Zhao
authors: Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric Physics, Nanjing University of Science Information & Technology, Nanjing 210044, China.
authors: Yan
authors: Y
authors: Yin
authors: Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric Physics, Nanjing University of Science Information & Technology, Nanjing 210044, China.
authors: Bin
authors: B
authors: Zhu
authors: Division of Atmospheric Science, Desert Research Institute, Reno, NV 89512, USA.
authors: Yunpeng
authors: Y
authors: Shan
authors: Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric Physics, Nanjing University of Science Information & Technology, Nanjing 210044, China.
authors: Xiaomei
authors: X
authors: Guo
authors: Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric Physics, Nanjing University of Science Information & Technology, Nanjing 210044, China.
authors: Chenghao
authors: C
authors: Tan
authors: Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric Physics, Nanjing University of Science Information & Technology, Nanjing 210044, China.
authors: Jinhui
authors: J
authors: Gao
authors: Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric Physics, Nanjing University of Science Information & Technology, Nanjing 210044, China.
authors: Haoliang
authors: H
authors: Wang
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D002681:China; D004777:Environment; D004784:Environmental Monitoring; D010126:Ozone / Q000032:analysis*; D012621:Seasons
chemical_list: D000393:Air Pollutants; D010126:Ozone
keywords: Diurnal O(3) change; Mountainous areas; Regional transport; Residual layer