Peroxy radical partitioning during the AMMA radical intercomparison exercise
Peroxy radical partitioning during the AMMA radical intercomparison exercise
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DOI：
10.5194/acp-10-10621-2010
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发表时间：
2010-11
影响因子：
6.3
通讯作者：
M. Andrés-Hernández;D. Stone;D. M. Brookes;R. Commane;C. Reeves;H. Huntrieser;D. Heard;P. Monks;J. Burrows;H. Schlager;D. Kartal;M. J. Evans;C. Floquet;T. Ingham;J. Methven;A. Parker
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文献类型：
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作者：
M. Andrés-Hernández;D. Stone;D. M. Brookes;R. Commane;C. Reeves;H. Huntrieser;D. Heard;P. Monks;J. Burrows;H. Schlager;D. Kartal;M. J. Evans;C. Floquet;T. Ingham;J. Methven;A. Parker
抽象。在2006年夏天的AMMA（非洲季风多学科分析）活动期间，在两架科学飞机上测量了过氧自由基。本文报告了2006年8月16日飞行的结果，在此期间，采用基于过氧自由基化学放大（PeRCA）技术的两种类似仪器，通过低压激光诱导荧光光谱（LIF-FAGE）和总过氧自由基（RO 2 * = HO 2 + PORO 2，R =有机链）测量HO 2，进行了盲态相互比较。德国的DLR-Falcon和英国的FAAM-BAe-146在布基纳法索同一地理区域的697和485 hPa的两个水平高度上进行了大约30分钟的翼尖对翼尖的同时测量。同时收集了一套完整的支持测量数据，包括光解频率和相关的痕量气体，如CO，NO，NO2，NOy，O3和更广泛的VOCs。结果进行了讨论的基础上所使用的不同仪器的特点和局限性。一般而言，未发现数据偏倚，并且可用的RO 2 * 数据在仪器误差范围内相当合理。的[RO 2 *]/[HO 2]的比例，这之间的变化1：1和3：1，以及过氧自由基的变化，同意在光解速率和其他潜在的自由基前体的变化。模型结果提供了更多的信息占主导地位的自由基的形成和损失过程。
Abstract. Peroxy radicals were measured onboard two scientific aircrafts during the AMMA (African Monsoon Multidisciplinary Analysis) campaign in summer 2006. This paper reports results from the flight on 16 August 2006 during which measurements of HO2 by laser induced fluorescence spectroscopy at low pressure (LIF-FAGE) and total peroxy radicals (RO2* = HO2+ΣRO2, R = organic chain) by two similar instruments based on the peroxy radical chemical amplification (PeRCA) technique were subject of a blind intercomparison. The German DLR-Falcon and the British FAAM-BAe-146 flew wing tip to wing tip for about 30 min making concurrent measurements on 2 horizontal level runs at 697 and 485 hPa over the same geographical area in Burkina Faso. A full set of supporting measurements comprising photolysis frequencies, and relevant trace gases like CO, NO, NO2, NOy, O3 and a wider range of VOCs were collected simultaneously. Results are discussed on the basis of the characteristics and limitations of the different instruments used. Generally, no data bias are identified and the RO2* data available agree quite reasonably within the instrumental errors. The [RO2*]/[HO2] ratios, which vary between 1:1 and 3:1, as well as the peroxy radical variability, concur with variations in photolysis rates and in other potential radical precursors. Model results provide additional information about dominant radical formation and loss processes.