Consistency of long-term elemental carbon trends from thermal and optical measurements in the IMPROVE network
Chen, LWA (Chen, L. -W. A.)[1,2]; Chow, JC (Chow, J. C.)[1,2]; Watson, JG (Watson, J. G.)[1,2]; Schichtel, BA (Schichtel, B. A.)[3]
2012-12-30
发表期刊ATMOSPHERIC MEASUREMENT TECHNIQUES
卷号5期号:10页码:2329-2338
文章类型期刊论文
摘要

Decreasing trends of elemental carbon (EC) have been reported at US Interagency Monitoring of PROtected Visual Environments (IMPROVE) network from 1990 to 2004, consistent with the phase-in of cleaner engines, residential biomass burning technologies, and prescribed burning practices. EC trends for the past decade are examined due to an upgrade of IMPROVE carbon instruments and the thermal/optical analysis protocol since 2005. Filter reflectance (tau(R)) values measured as part of the carbon analysis were retrieved from archived data and compared with EC for 65 sites with more complete records within 2000-2009. EC-tau(R) relationships suggest minor changes of EC quantified by the original and upgraded instruments for most IMPROVE samples. EC and tau(R) show universal decreasing trends across the US. The EC and tau(R) trends are correlated, with national average downward rates (relative to the 2000-2004 baseline medians) of 4.5% yr(-1) for EC and 4.1% yr(-1) for tau(R). The consistency between independent EC and tau(R) measurements adds to the weight of evidence that EC reductions are real rather than an artifact of changes to the measurement process.

DOI10.5194/amt-5-2329-2012
收录类别SCI
语种英语
引用统计
被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/10136
专题黄土与第四纪地质国家重点实验室(2010~)
通讯作者Chen, LWA (Chen, L. -W. A.)[1,2]
作者单位1.Division of Atmospheric Sciences, Desert Research Institute, 2215 Raggio Parkway, Reno, Nevada 89512, USA;
2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences,10 Fenghui South Road, Xi’an 710075, China;
3.Cooperative Institute for Research in the Atmosphere, Colorado State University, 1375 Campus Delivery, Fort Collins,Colorado 80523, USA
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Chen, LWA ,Chow, JC ,Watson, JG ,et al. Consistency of long-term elemental carbon trends from thermal and optical measurements in the IMPROVE network[J]. ATMOSPHERIC MEASUREMENT TECHNIQUES,2012,5(10):2329-2338.
APA Chen, LWA ,Chow, JC ,Watson, JG ,&Schichtel, BA .(2012).Consistency of long-term elemental carbon trends from thermal and optical measurements in the IMPROVE network.ATMOSPHERIC MEASUREMENT TECHNIQUES,5(10),2329-2338.
MLA Chen, LWA ,et al."Consistency of long-term elemental carbon trends from thermal and optical measurements in the IMPROVE network".ATMOSPHERIC MEASUREMENT TECHNIQUES 5.10(2012):2329-2338.
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