Tropical tropospheric ozone observed in Thailand
Tropical tropospheric ozone observed in Thailand
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DOI：
10.1016/s1352-2310(00)00441-6
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发表时间：
2001-05
影响因子：
5
通讯作者：
P. Pochanart;J. Kreasuwun;P. Sukasem;Werathep Geeratithadaniyom;M. Tabucanon;J. Hirokawa;Y. Kajii
中科院分区：
文献类型：
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作者：
P. Pochanart;J. Kreasuwun;P. Sukasem;Werathep Geeratithadaniyom;M. Tabucanon;J. Hirokawa;Y. Kajii
首次连续测量了泰国两个农村/偏远地区的地面臭氧混合比，这两个地点是InThanon和Srinakarin。1996-1998年期间，两个测点的臭氧季节变化基本一致，旱季最大值和雨季最小值的季节变化幅度较大。在因他农，每月平均的臭氧混合比率在9-55 ppb之间，年平均比率为27 ppb。斯里纳卡林的臭氧混合比率与此类似，为9-45 ppb，年平均为28 ppb。根据InThanon臭氧资料的轨迹分析，亚洲季风条件下O_3的远距离输送可以主要解释在雨季来自印度洋的清洁海洋气团中较低的13 ppb的O_3混合比，但仅部分解释来自东北亚的大陆气团在雨季或旱季中相对较低的O_3混合比，26 ppb或更低。在东南亚内部输送的气团中发现的臭氧混合率最高，在旱季平均为46ppb。旱季高的臭氧混合比主要是由于东南亚生物质燃烧引发的局地/次区域尺度的臭氧产生，而不是远距离输送的影响。
The mixing ratios of surface ozone at two rural/remote sites in Thailand, Inthanon and Srinakarin, have been measured continuously for the first time. Almost identical seasonal variations of O3with dry season maximum and a wet season minimum with a large seasonal amplitude are observed at both sites during 1996–1998. At Inthanon, the monthly averaged O3mixing ratios range 9–55ppb, with the annual average of 27ppb. The ozone mixing ratios at Srinakarin are in the similar range, 9–45ppb with annual average of 28ppb. Based on trajectory analysis of O3data at Inthanon, the long-range transport of O3under Asian monsoon regime could primarily explain the low O3mixing ratios of 13ppb in clean marine air mass from Indian Ocean during wet season but only partly explain the relatively low O3mixing ratios, 26ppb or less, in continental air mass from northeast Asia either in wet or dry season. The highest O3mixing ratios are found in air masses transported within southeast Asia, averaged 46ppb in dry season. The high O3mixing ratios during the dry season are suggested to be significantly due to the local/sub-regional scale O3production triggered by biomass burning in southeast Asia rather than long-range transport effect.