A study of global atmospheric budget and distribution of acetone using global atmospheric model STOCHEM-CRI
A study of global atmospheric budget and distribution of acetone using global atmospheric model STOCHEM-CRI
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使用全球大气模型 STOCHEM-CRI 研究全球大气收支和丙酮分布
DOI:
10.1016/j.atmosenv.2015.04.056
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发表时间:
2015
影响因子:
5
通讯作者:
Khan M
中科院分区:
文献类型:
--
作者:
Khan M
The impact of including a more detailed VOC oxidation scheme (CRI v2-R5) with a multi-generational approach for simulating tropospheric acetone is investigated using a 3-D global model, STOCHEM-CRI. The CRI v2-R5 mechanism contains photochemical production of acetone from monoterpenes which account for 64% (46.8 Tg/yr) of the global acetone sources in STOCHEM-CRI. Both photolysis and oxidation by OH in the troposphere contributes equally (42%, each) and dry deposition contributes 16% of the atmospheric sinks of acetone. The tropospheric life-time and the global burden of acetone are found to be 18 days and 3.5 Tg, respectively, these values being close to those reported in the study of Jacob et al. (2002). A dataset of aircraft campaign measurements are used to evaluate the inclusion of acetone formation from monoterpenes in the CRI v2-R5 mechanism used in STOCHEM-CRI. The overall comparison between measurements and models show that the parameterised approach in STOCHEM-NAM (no acetone formation from monoterpenes) underpredicts the mixing ratios of acetone in the atmosphere. However, using a detailed monoterpene oxidation mechanism forming acetone has brought the STOCHEM-CRI into closer agreement with measurements with an improvement in the vertical simulation of acetone. The annual mean surface distribution of acetone simulated by the STOCHEM-CRI shows a peak over forested regions where there are large biogenic emissions and high levels of photochemical activity. Year-long observations of acetone and methanol at the Mace Head research station in Ireland are compared with the simulated acetone and methanol produced by the STOCHEM-CRI and found to produce good overall agreement between model and measurements. The seasonal variation of model and measured acetone levels at Mace Head, California, New Hampshire and Minnesota show peaks in summer and dips in winter, suggesting that photochemical production may have the strongest effect on its seasonal trend.
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影响因子:
5
作者:
D. J. Moore
通讯作者:
D. J. Moore
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
K. Wohlfrom;T. Hauler;F. Arnold;H. Singh
通讯作者:
H. Singh
影响因子:
5
作者:
Utembe S
通讯作者:
Utembe S
DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
S. Mckeen;T. Gierczak;J. B. Burkholder;P. Wennberg;T. Hanisco;E. Keim;R. Gao;S. Liu;A. Ravishankara;D. Fahey
通讯作者:
D. Fahey
影响因子:
--
作者:
K. Pickering;A. Thompson;Yansen Wang;W. Tao;D. McNamara;V. Kirchhoff;B. Heikes;G. Sachse;J. Bradshaw;G. Gregory;D. Blake
通讯作者:
K. Pickering;A. Thompson;Yansen Wang;W. Tao;D. McNamara;V. Kirchhoff;B. Heikes;G. Sachse;J. Bradshaw;G. Gregory;D. Blake