Seasonal and latitudinal variation of 14CO and the tropospheric concentration of OH radicals
Seasonal and latitudinal variation of 14CO and the tropospheric concentration of OH radicals
复制标题
14CO 和对流层 OH 自由基浓度的季节和纬度变化
DOI：
10.1029/jc086ic06p05163
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发表时间：
1981
影响因子：
--
通讯作者：
R. Derwent
中科院分区：
文献类型：
--
作者：
A. Volz;D. Ehhalt;R. Derwent
报告了/sup 14/CO浓度的地面测量结果。在中纬度地区，数据显示出明确的季节变化，冬季最大值为25 +-2分子cm/sup-3/，夏季最大值为11 +-1分子cm/sup-3/。测量结果还表明，纬度变化很大，热带地区的浓度较低。使用2-D时间依赖模型解释数据。为了平衡/sup 14/CO和/sup 12/CO的来源，对流层OH的平均浓度需要达到（6.5/sup +3//sub -/2）x 10/sup 5/ molecule cm/sup-3/。此外，从生物过程，包括非甲烷烃的氧化的/sup 12/CO生产率被发现是1250 × 10/sup 12/ g CO yr/sup-1/。
Ground-based measurements of the concentration of /sup 14/CO are reported. The data exhibit a well-defined seasonal variation at mid-latitudes with a maximum of 25 +- 2 molecule cm/sup -3/ during winter and a minium of 11 +- 1 molecule cm/sup -3/ during summer. The measurements also indicate a strong latitudinal variation, with the lower concentrations occurring in the tropics. The data are interpreted using a 2-D time-dependent model. To balance the sources of both /sup 14/CO and /sup 12/CO, an average tropospheric OH concentration of (6.5/sup +3//sub -/2) x 10/sup 5/ molecule cm/sup -3/ is required. In addition, the /sup 12/CO production rate from biological processes including the oxidation of nonmethane hydrocarbons is found to be 1250 x 10/sup 12/ g CO yr/sup -1/.