Airborne characterization of smoke marker ratios from prescribed burning

被引：46

作者：

Sullivan, A. P. ^{[1
]}

May, A. A. ^{[1
]}

Lee, T. ^{[1
]}

McMeeking, G. R. ^{[1
]}

Kreidenweis, S. M. ^{[1
]}

Akagi, S. K. ^{[2
]}

Yokelson, R. J. ^{[2
]}

Urbanski, S. P. ^{[3
]}

Collett, J. L., Jr. ^{[1
]}

机构：

[1] Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA

[2] Univ Montana, Dept Chem, Missoula, MT 59812 USA

[3] US Forest Serv, USDA, Rocky Mt Res Stn, Fire Sci Lab, Missoula, MT 59808 USA

来源：

ATMOSPHERIC CHEMISTRY AND PHYSICS | 2014年 / 14卷 / 19期

关键词：

AEROSOL MASS-SPECTROMETRY; FINE-PARTICLE EMISSIONS; LIQUID SAMPLER PILS; SOURCE APPORTIONMENT; TRACE GASES; ORGANIC-COMPOUNDS; HIGH-RESOLUTION; UNITED-STATES; LABORATORY MEASUREMENTS; PARTICULATE MATTER;

D O I：

10.5194/acp-14-10535-2014

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A Particle-Into-Liquid Sampler - Total Organic Carbon (PILS-TOC) and fraction collector system was flown aboard a Twin Otter aircraft sampling prescribed burning emissions in South Carolina in November 2011 to obtain smoke marker measurements. The fraction collector provided 2 min time-integrated offline samples for carbohydrate (i.e., smoke markers levoglucosan, mannosan, and galactosan) analysis by high-performance anion-exchange chromatography with pulsed amperometric detection. Each fire location appeared to have a unique Delta levoglucosan/Delta water-soluble organic carbon (WSOC) ratio (RF01/RF02/RF03/RF05 = 0.163 +/- 0.007 mu g C mu g(-1) C, RF08 = 0.115 +/- 0.011 mu g C mu g(-1) C, RF09A = 0.072 +/- 0.028 mu g C mu g(-1) C, and RF09B = 0.042 +/- 0.008 mu g C mu g(-1) C, where RF means research flight). These ratios were comparable to those obtained from controlled laboratory burns and suggested that the emissions sampled during RF01/F02/RF03/RF05 were dominated by the burning of grasses, RF08 by leaves, RF09A by needles, and RF09B by marsh grasses. These findings were further supported by the Delta galactosan/Delta levoglucosan ratios (RF01/RF02/RF03/RF05 = 0.067 +/- 0.004 mu g mu g(-1), RF08 = 0.085 +/- 0.009 mu g mu g(-1), and RF09A = 0.101 +/- 0.029 mu g mu g(-1)) obtained as well as by the ground-based fuel and filter sample analyses during RF01/RF02/RF03/RF05. Differences between Delta potassium/Delta levoglucosan ratios obtained for these prescribed fires vs. laboratory-scale measurements suggest that some laboratory burns may not accurately represent potassium emissions from prescribed burns. The Delta levoglucosan/Delta WSOC ratio had no clear dependence on smoke age or fire dynamics suggesting that this ratio is more dependent on the type of fuel being burned. Levoglucosan was stable over a timescale of at least 1.5 h and could be useful to help estimate the air quality impacts of biomass burning.

引用

页码：10535 / 10545

页数：11

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