Intercomparisons of airborne measurements of aerosol ionic chemical composition during TRACE‐P and ACE‐Asia
Intercomparisons of airborne measurements of aerosol ionic chemical composition during TRACE‐P and ACE‐Asia
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TRACE-P 和 ACE-Asia 期间气溶胶离子化学成分空气测量值的相互比较
DOI：
10.1029/2003jd003673
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发表时间：
2004
影响因子：
--
通讯作者：
E. Scheuer
中科院分区：
文献类型：
--
作者：
Y. Ma;R. Weber;K. Maxwell;D. Orsini;Y.;B. Huebert;S. Howell;T. Bertram;R. Talbot;J. Dibb;E. Scheuer
[1]作为两项实地研究的一部分，即太平洋上空的迁移和化学演变研究和亚洲气溶胶特性鉴定实验，使用不同的方法从三架不同的飞机上测量了西太平洋上空对流层气溶胶的无机化学成分。比较了一套微粒在线快速测量技术--液粒采样器（PILS）--雾室/离子色谱仪（MC/IC）测量精细硫酸盐，以及长时间积分过滤器和微孔冲击器（MOI）测量方法。编队飞行的两架独立飞机上的相同PILS之间的比较表明，它们高度相关（例如，硫酸盐r2为0.95），但系统性差异为10 ± 5%（线性回归斜率和95%置信界限），并且在具有低湍流入口和较短入口至仪器传输管的飞机上通常具有较高的浓度。在编队飞行过程中，两种不同飞机上的PILS和雾室测量的细硫酸盐的比较具有0.78的r2和39% ± 5%的相对差异。从同一架飞机上的不同进气道取样，将MOI离子数据与PILS上限测量尺寸（1.3 μm）相结合，结果表明，对于硫酸盐，PILS和MOI在14% ± 6%范围内，相关性r2为0.87。大多数离子化合物在± 30%以内，这在PILS和地面比较综合采样器之间报告的差异范围内。在许多情况下，由于检测上限的差异，很难在各种仪器之间进行直接的相互比较。然而，对于这项研究，结果表明，从飞机上测得的细颗粒质量组成在30- 40%范围内。
[1] As part of the two field studies, Transport and Chemical Evolution over the Pacific (TRACE-P) and the Asian Aerosol Characterization Experiment (ACE-Asia), the inorganic chemical composition of tropospheric aerosols was measured over the western Pacific from three separate aircraft using various methods. Comparisons are made between the rapid online techniques of the particle into liquid sampler (PILS) for measurement of a suite of fine particle a mist chamber/ion chromatograph (MC/IC) measurement of fine sulfate, and the longer time-integrated filter and micro-orifice impactor (MOI) measurements. Comparisons between identical PILS on two separate aircraft flying in formation showed that they were highly correlated (e.g., sulfate r2 of 0.95), but were systematically different by 10 ± 5% (linear regression slope and 95% confidence bounds), and had generally higher concentrations on the aircraft with a low-turbulence inlet and shorter inlet-to-instrument transmission tubing. Comparisons of PILS and mist chamber measurements of fine sulfate on two different aircraft during formation flying had an r2 of 0.78 and a relative difference of 39% ± 5%. MOI ionic data integrated to the PILS upper measurement size of 1.3 μm sampling from separate inlets on the same aircraft showed that for sulfate, PILS and MOI were within 14% ± 6% and correlated with an r2 of 0.87. Most ionic compounds were within ±30%, which is in the range of differences reported between PILS and integrated samplers from ground-based comparisons. In many cases, direct intercomparison between the various instruments is difficult due to differences in upper-size detection limits. However, for this study, the results suggest that the fine particle mass composition measured from aircraft agree to within 30–40%.