HOsubx/sub observations over West Africa during AMMA: impact of isoprene and NOsubx/sub

D.Stone; M. J.Evans; R.Commane; T.Ingham; C. F. A.Floquet; J. B.McQuaid; D. M.Brookes; P. S.Monks; R.Purvis; J. F.Hamilton; J.Hopkins; J.Lee; A. C.Lewis; D.Stewart; J. G.Murphy; G.Mills; D.Oram; C. E.Reeves; D. E.Heard

首页> 外文期刊>Atmospheric chemistry and physics >HOsubx/sub observations over West Africa during AMMA: impact of isoprene and NOsubx/sub

【24h】

HOsubx/sub observations over West Africa during AMMA: impact of isoprene and NOsubx/sub

机译：AMMA期间西非的HO _{x 观测：异戊二烯和NO _{x 的影响}}

获取原文

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相似文献
相关主题

摘要

Aircraft OH and HO₂ measurements made over West Africa during the AMMA fieldcampaign in summer 2006 have been investigated using a box model constrained to observationsof long-lived species and physical parameters. "Good" agreement was found forHO₂ (modelled to observed gradient of 1.23 ± 0.11). However, the modelsignificantly overpredicts OH concentrations. The reasons for this are not clear, but mayreflect instrumental instabilities affecting the OH measurements. Within themodel, HO_x concentrations in West Africa are controlled by relatively simplephotochemistry, with production dominated by ozone photolysis and reaction of O(1D)with water vapour, and loss processes dominated by HO₂ + HO₂ andHO₂ + RO₂. Isoprene chemistry was found to influence forestedregions. In contrast to several recent field studies in very low NO_x and highisoprene environments, we do not observe any dependence of model success for HO₂ onisoprene and attribute this to efficient recycling of HO_x through RO₂ + NOreactions under the moderate NO_x concentrations (5–300 ppt NO in the boundary layer, median 76 ppt)encountered during AMMA. This suggests that some of the problems with understandingthe impact of isoprene on atmospheric composition may be limited to the extreme low range ofNO_x concentrations.

机译：使用限制于观察长寿物种和物理参数的盒模型，研究了2006年夏季在AMMA野外运动期间在西非进行的飞机OH和HO _{2 测量。发现HO _{2 具有“良好”的一致性（建模为观察到的1.23±0.11的梯度）。但是，该模型明显高估了OH浓度。其原因尚不清楚，但可能反映出影响OH测量的仪器不稳定。在该模型中，西非的HO _{x 浓度是通过相对简单的光化学控制的，其生产主要由臭氧光解和O（ 1 D）与水蒸气的反应以及损失过程决定。由HO _{2 + HO _{2 和HO _{2 + RO _{2 主导。发现异戊二烯化学影响林区。与最近在非常低的NO _{x 和高异戊二烯环境中进行的几项现场研究相比，我们没有观察到HO _{2 异戊二烯模型成功的任何依赖关系，而是将其归因于有效的H在中等NO _{x 浓度（边界层NO为5-300 ppt，中位数为76 ppt）下发生HO _{x 至RO _{2 + NO反应在AMMA期间。这表明了解异戊二烯对大气成分影响的一些问题可能仅限于NO _{x 浓度的极低范围。}}}}}}}}}}}}}

著录项

来源
《Atmospheric chemistry and physics》 |2010年第19期|共15页
作者
D.Stone; M. J.Evans; R.Commane; T.Ingham; C. F. A.Floquet; J. B.McQuaid; D. M.Brookes; P. S.Monks; R.Purvis; J. F.Hamilton; J.Hopkins; J.Lee; A. C.Lewis; D.Stewart; J. G.Murphy; G.Mills; D.Oram; C. E.Reeves; D. E.Heard;
展开▼
作者单位

展开▼
收录信息
原文格式 PDF
正文语种
中图分类大气科学（气象学）;
关键词

相似文献

外文文献
中文文献
专利

1. Biogenic nitrogen oxide emissions from soils: impact on NOsubx/sub and ozone over west Africa during AMMA (African Monsoon Multidisciplinary Analysis): observational study [J] . D. J.Stewart, C. M.Taylor, C. E.Reeves, Atmospheric chemistry and physics . 2008,第8期

机译：土壤中的生物氮氧化物排放量：在AMMA期间对西非NO _{x 和臭氧的影响（非洲季风多学科分析）：观测研究}
2. Biogenic nitrogen oxide emissions from soils – impact on NOsubx/sub and ozone over West Africa during AMMA (African Monsoon Multidisciplinary Experiment): modelling study [J] . C.Delon, C. E.Reeves, D. J.Stewart, Atmospheric chemistry and physics . 2008,第9期

机译：土壤中的生物氮氧化物排放- AMMA（非洲季风多学科实验）对西非NO _{x 和臭氧的影响：模拟研究}
3. HO_x observations over West Africa during AMMA: Impact of isoprene and NO_x [J] . Stone D., Evans M.J., Commane R., Atmospheric chemistry and physics . 2010,第19期

机译：在AMMA期间对西非的HO_x观测：异戊二烯和NO_x的影响
4. AMMA forcing data for a better understanding of the West African monsoon surface-atmosphere-hydrology interactions [C] . A. BOONE, P. DEROSNAY International Union of Geodesy and Geophysics . 2007

机译：AMMA迫使数据更好地了解西非季风表面 - 气氛水文相互作用
5. The Impact of Economic Community of West Africa States Protocol on Democracy and Good Governance in West Africa: The case of the Gambia [D] . Adebayo, Oluwakemi Adenike 2018

机译：西非经济共同体国家议定书对西非民主和善政的影响：冈比亚案例
6. Impact of the Mycobaterium africanum West Africa 2 Lineage on TB Diagnostics in West Africa: Decreased Sensitivity of Rapid Identification Tests in The Gambia [O] . Boatema Ofori-Anyinam, Fatoumatta Kanuteh, Schadrac C. Agbla, 2016

机译：非洲分枝杆菌非洲西部2谱系对西非结核病诊断的影响：冈比亚快速鉴定测试的敏感性降低
7. HOx observations over West Africa during AMMA: impact of isoprene and NOx [O] . Stone D., Evans M.J., Commane R., 2010

机译：AMMA期间西非的HOx观测：异戊二烯和NOx的影响

HOsubx/sub observations over West Africa during AMMA: impact of isoprene and NOsubx/sub

摘要

著录项

相似文献

相关主题

期刊订阅