Tropospheric ozone climatology over Peninsular Malaysia from 1992 to 1999
Tropospheric ozone climatology over Peninsular Malaysia from 1992 to 1999
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DOI：
10.1029/2001jd000993
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发表时间：
2002-08
影响因子：
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通讯作者：
S. Yonemura;H. Tsuruta;S. Kawashima;S. Sudo;Leong Chow Peng;L. Fook;Zubaidi Johar;M. Hayashi
中科院分区：
文献类型：
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作者：
S. Yonemura;H. Tsuruta;S. Kawashima;S. Sudo;Leong Chow Peng;L. Fook;Zubaidi Johar;M. Hayashi
[1]本文介绍了1992 - 1999年8年间热带亚洲马来西亚半岛对流层臭氧的气候学，这是由每月两次的臭氧仪测量得到的。垂直剖面的平均臭氧浓度与印度尼西亚Watukosek观测到的臭氧浓度处于相同的范围（30-40 ppbv），低于巴西纳塔尔省、南美洲以及刚果布拉柴维尔、非洲，这表明马来西亚半岛上空的气团主要受海洋环境和深层对流的影响，如全年对流层中层显著的水汽水平所示。除1994年和1997年外，12月、1月和2月（DJF）和3月、4月和5月（MAM）在6 ~ 7.5 km海拔高度均最高，6月、7月和8月（JJA）和9月、10月和11月（SON）在所有海拔高度均最低。DJF期间对流层中部臭氧增强可能是由于温度正异常和水汽负异常导致深对流减弱所致。特别是在1997年和1998年，MAM对流层中层（bbb50 km）以上的臭氧增强可能主要归因于北半球臭氧前体气体增强产生的光化学产物，特别是东南亚大陆的生物质燃烧。在1994年和1997年夏季观测到的高达10-20多布森单位的大臭氧增强与印度尼西亚的大规模生物质燃烧有关。
[1] We present the climatology of tropospheric ozone over Peninsular Malaysia in tropical Asia for the 8 years from 1992 through 1999 as measured by ozonesondes twice a month. The mean ozone concentrations in vertical profile were in the same range (30–40 ppbv) as those observed at Watukosek, Indonesia, and were lower than those at Natal, Brazil, South America, and at Brazzaville, Congo, Africa, indicating that air masses over Peninsular Malaysia are primarily influenced by the maritime environment and deep convection, as shown by the significant levels of water vapor in the middle troposphere throughout the year. Seasonally averaged ozone concentrations were highest in December, January, and February (DJF) from 6 to 7.5 km altitude and in March, April, and May (MAM) at all other heights and were lowest in June, July, and August (JJA) and September, October, and November (SON), excluding 1994 and 1997, at all heights. The ozone enhancements during DJF in the middle troposphere could be caused by depression of the deep convection because of the positive temperature anomaly and negative water vapor anomaly. The ozone enhancements above the middle troposphere (>5 km) in MAM, especially in 1997 and 1998, could be predominantly attributed to photochemical production from enhanced ozone precursor gases of Northern Hemisphere origin, especially biomass burning in continental Southeast Asia. Large ozone enhancements as high as 10–20 Dobson units observed during SON of 1994 and 1997 were associated with large-scale biomass burnings in Indonesia.