...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric chemistry and physics >Comparison of surface ozone simulation among selected regional models in MICS-Asia?III – effects of chemistry and vertical transport for the causes of difference
【24h】

Comparison of surface ozone simulation among selected regional models in MICS-Asia?III – effects of chemistry and vertical transport for the causes of difference

机译：MICS-Asia？III中选定的区域模型之间的表面臭氧模拟的比较-化学和垂直传输对差异成因的影响

获取原文
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In order to clarify the causes of variability among the model outputs for surface ozone in the Model Intercomparison Study Asia Phase?III (MICS-Asia?III), three regional models, CMAQ?v.5.0.2, CMAQ?v.4.7.1, and NAQPMS (abbreviated as NAQM in this paper), have been selected. Detailed analyses of monthly averaged diurnal variation have been performed for selected grids covering the metropolitan areas of Beijing and Tokyo and at a remote oceanic site, Oki. The chemical reaction mechanism, SAPRC99, used in the CMAQ models tended to give a higher net chemical ozone production than CBM-Z used in NAQM, agreeing with previous studies. Inclusion of the heterogeneous “renoxification” reaction of HNO 3 (on soot surface) → NO + NO 2 only in NAQM would give a higher NO concentration resulting in a better agreement with observational data for NO and nighttime Osub3/sub mixing ratios. In addition to chemical processes, the difference in the vertical transport of Osub3/sub was found to affect the simulated results significantly. Particularly, the increase in downward Osub3/sub flux from the upper layer to the surface after dawn was found to be substantially different among the models. Larger early morning vertical transport of Osub3/sub simulated by CMAQ?5.0.2 is thought to be the reason for higher daytime Osub3/sub in July in this model. All three models overestimated the daytime ozone by ca.?20 ppbv at the remote site Oki in July, where in situ photochemical activity is minimal.
机译：为了弄清亚洲比较模型研究III期（MICS-Asia III）中地表臭氧的模型输出之间存在差异的原因，使用了三个区域模型：CMAQ v.5.0.2，CMAQ v.4.7。 1，并且选择了NAQPMS（在本文中缩写为NAQM）。已对覆盖北京和东京都会区以及偏远海洋站点冲木的选定网格进行了月平均日变化的详细分析。 CMAQ模型中使用的化学反应机理SAPRC99倾向于比NAQM中使用的CBM-Z产生更高的净化学臭氧产量，这与以前的研究一致。仅在NAQM中包含HNO 3（在烟灰表面）→NO + NO 2的异质“再氧化”反应会产生更高的NO浓度，从而与NO和夜间O 3 混合比例。除了化学过程外，还发现O 3 的垂直传输差异显着影响模拟结果。特别是，发现在黎明之后，从上层到地表的向下O 3 通量的增加在各模型之间是基本不同的。 CMAQ？5.0.2模拟的较大的O 3 垂直清晨传输被认为是该模型7月份白天O 3 较高的原因。这三个模型都在7月的偏远站点Oki上将白天的臭氧高估了约20 ppbv，其中原位光化学活性很小。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号