<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Wang, H. C.</style></author><author><style face="normal" font="default" size="100%">Chen, T.</style></author><author><style face="normal" font="default" size="100%">Lu, K. D.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Measurement of NO&lt;sub&gt;3&lt;/sub&gt; and N&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;5&lt;/sub&gt; in the Troposphere</style></title><secondary-title><style face="normal" font="default" size="100%">Progress in Chemistry</style></secondary-title><alt-title><style face="normal" font="default" size="100%">Prog Chem</style></alt-title><short-title><style face="normal" font="default" size="100%">Prog. Chem.</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">chemical mechanism</style></keyword><keyword><style  face="normal" font="default" size="100%">differential optical-absorption</style></keyword><keyword><style  face="normal" font="default" size="100%">dinitrogen pentoxide (n2o5)</style></keyword><keyword><style  face="normal" font="default" size="100%">enhanced absorption-spectroscopy</style></keyword><keyword><style  face="normal" font="default" size="100%">field measurement</style></keyword><keyword><style  face="normal" font="default" size="100%">in-situ measurement</style></keyword><keyword><style  face="normal" font="default" size="100%">induced fluorescence technique</style></keyword><keyword><style  face="normal" font="default" size="100%">ionization mass-spectrometry</style></keyword><keyword><style  face="normal" font="default" size="100%">laser-induced fluorescence</style></keyword><keyword><style  face="normal" font="default" size="100%">marine boundary-layer</style></keyword><keyword><style  face="normal" font="default" size="100%">measurement techniques</style></keyword><keyword><style  face="normal" font="default" size="100%">nitrate radical (no3)</style></keyword><keyword><style  face="normal" font="default" size="100%">nocturnal nitrogen-oxides</style></keyword><keyword><style  face="normal" font="default" size="100%">pearl river-delta</style></keyword><keyword><style  face="normal" font="default" size="100%">ring-down spectroscopy</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2015</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jul</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">7</style></number><volume><style face="normal" font="default" size="100%">27</style></volume><pages><style face="normal" font="default" size="100%">963-976</style></pages><isbn><style face="normal" font="default" size="100%">1005-281X</style></isbn><language><style face="normal" font="default" size="100%">Chinese</style></language><abstract><style face="normal" font="default" size="100%">Nitrate radical (NO3) and dinitrogen pentoxide (N2O5) are key species of the tropospheric chemistry, that play a central role in the tropospheric chemical issues such as atmospheric self cleansing capacity, secondary aerosol formations, reactive halogen chemistry, global sulfur cycles, etc. Nevertheless, the accurate and precise determination of both NO3 and N2O5 is still a challenging task due to their low ambient concentrations, high reactivity and short life time. In this paper, we summarize all kinds of measurement techniques used in the field observations of NO3 and N2O5, including differential optical absorption spectroscopy (DOAS), cavity ring-down spectroscopy (CRDS), cavity enhance absorption spectroscopy (CEAS), laser-induced fluorescence (LIF), matrix isolation electron spin resonance spectroscopy (MIESR), and chemical ionization mass spectrometry(CIMS). The advantages and disadvantages of those techniques are reviewed on the aspects of measurement accuracy, precision, time resolution, interference, calibration and operation stability. The absorption spectroscopy is the best technical approach, especially the subcategories-CRDS and CEAS developed in the last decade are the techniques with high potential of good performance in field applications. However, because high aerosol loadings are always presented in the atmosphere of the mega-city regions in China, the aerosol extinction could be a significant barrier to come over for the techniques based on absorption spectroscopy. Moreover, the observed NO3 and N2O5 concentrations and the major scientific findings of corresponding measurement campaigns conducted in typical tropospheric conditions as urban, forest, free troposphere and marine environments, etc. are outlined. Finally, we discuss the unresolved issues of the NO3 and N2O5 chemistry and possible new directions for future studies in chemically complex environments.</style></abstract><accession-num><style face="normal" font="default" size="100%">WOS:000358395800016</style></accession-num><notes><style face="normal" font="default" size="100%">&lt;p&gt;Cn4jgTimes Cited:0Cited References Count:95&lt;/p&gt;</style></notes><auth-address><style face="normal" font="default" size="100%">Lu, KdPeking Univ, Coll Environm Sci &amp;amp;amp; Engn, State Key Joint Lab Environm Simulat &amp;amp;amp; Pollut Con, Beijing 100871, Peoples R ChinaPeking Univ, Coll Environm Sci &amp;amp;amp; Engn, State Key Joint Lab Environm Simulat &amp;amp;amp; Pollut Con, Beijing 100871, Peoples R ChinaPeking Univ, Coll Environm Sci &amp;amp;amp; Engn, State Key Joint Lab Environm Simulat &amp;amp;amp; Pollut Con, Beijing 100871, Peoples R ChinaUniv Shanghai Sci &amp;amp;amp; Technol, Sch Energy &amp;amp;amp; Power Engn, Shanghai Key Lab Multiphase Flow &amp;amp;amp; Heat Transfer, Shanghai 200093, Peoples R China</style></auth-address></record></records></xml>