Salve Pradeep R, Satapathy Deepty Ranjan, Katpatal Yashwant B, Wate Satish R
Environmental Impact and Risk Assessment Division, National Environmental Engineering Research Institute, Nehru Marg, Nagpur 440020 (M.S), India.
Environ Monit Assess. 2007 Oct;133(1-3):87-98. doi: 10.1007/s10661-006-9562-5. Epub 2007 Feb 8.
Stratospheric input and photochemical ozone formation in the troposphere are the two main sources determining the ozone levels in the surface layer of the atmosphere. Because of the importance of ozone in controlling the atmospheric chemistry and its decisive role in the heat balance of atmosphere, leading to climate change, the examination of its formation and destruction are of great interest. This study characterized the distribution of Ground level Ozone (GLO) in Chandrapur district is lying between 19 degrees 25'N to 20 degrees 45'N and 78 degrees 50'E to 80 degrees 10'E. Continuous ozone analyzer was used to quantify GLO at thirteen locations fixed by Global Positioning System (GPS) during the winter of 2005-2006. The daily GLO at all the locations ranged between 6.4 and 24.8 ppbv with an average and standard deviation of 14.9 +/- 6.5 ppbv. The maximum and minimum concentration occurs during 1300-1600 h and 0300-0500 h may be due to high solar radiation facilitating photochemical production of O(3) and downward mixing from the overlying air mass and in situ destruction of ozone by deposition and/or the reaction between O(3) and NO. GIS based spatial distribution of GLO in Chandrapur district is indicates that the central core of the district and southern sites experienced elevated levels of GLO relative to the northern and western areas. The sites near by Chandrapur city are particularly affected by elevated GLO. The average variation of GLO with temperature shows a significant correlation of r = 0.55 indicating a direct relationship between GLO and temperature. Similarly an attempt has been made to compare the GLO monitored data in Chandrapur district with the reported values for other locations in Indian cities. This generated database helps regulatory agencies to identify locations where the natural resources and human health could be at risk.
平流层输入和对流层中光化学臭氧形成是决定大气表层臭氧水平的两个主要来源。由于臭氧在控制大气化学方面的重要性及其在大气热平衡中起决定性作用，进而导致气候变化，因此对其形成和破坏的研究备受关注。本研究对位于北纬19度25分至20度45分、东经78度50分至80度10分之间的钱德拉布尔地区的地面臭氧（GLO）分布特征进行了研究。在2005 - 2006年冬季，使用连续臭氧分析仪对通过全球定位系统（GPS）确定的13个地点的GLO进行了量化。所有地点的每日GLO范围在6.4至24.8 ppbv之间，平均为14.9 +/- 6.5 ppbv，标准偏差为6.5 ppbv。最高和最低浓度分别出现在1300 - 1600时和0300 - 0500时，这可能是由于高太阳辐射促进了O(3)的光化学产生以及来自上层气团的向下混合，以及臭氧通过沉积和/或O(3)与NO之间的反应而就地破坏。基于地理信息系统（GIS）的钱德拉布尔地区GLO空间分布表明，该地区的中心核心区域和南部站点的GLO水平相对于北部和西部地区有所升高。钱德拉布尔市附近的站点尤其受到GLO升高的影响。GLO随温度的平均变化显示出显著的相关性，r = 0.55，表明GLO与温度之间存在直接关系。同样，已尝试将钱德拉布尔地区监测到的GLO数据与印度其他城市其他地点的报告值进行比较。这个生成的数据库有助于监管机构识别自然资源和人类健康可能面临风险的地点。
