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Development of an improved two-sphere integration technique for quantifying black carbon concentrations in the atmosphere and seasonal snow
Wang, Xin1,2; Zhang, Xueying3; Di, Wenjing1
2020-01-08
Source PublicationAtmospheric Measurement Techniques   Impact Factor & Quartile Of Published Year  The Latest Impact Factor & Quartile
ISSN1867-1381
EISSN1867-8548
Volume13Issue:1Pages:39-52
page numbers14
AbstractAn improved two-sphere integration (TSI) technique has been developed to quantify black carbon (BC) concentrations in the atmosphere and seasonal snow. The major advantage of this system is that it combines two distinct integrated spheres to reduce the scattering effect due to light-absorbing particles and thus provides accurate determinations of total light absorption from BC collected on Nuclepore filters. The TSI technique can be calibrated using a series of 15 filter samples of standard fullerene soot. This technique quantifies the mass of BC by separating the spectrally resolved total light absorption into BC and non-BC fractions. To assess the accuracy of the improved system, an empirical procedure for measuring BC concentrations with a two-step thermal-optical method is also applied. Laboratory results indicate that the BC concentrations determined using the TSI technique and theoretical calculations are well correlated (R-2 = 0.99), whereas the thermal-optical method underestimates BC concentrations by 35 %-45% compared to that measured by the TSI technique. Assessments of the two methods for atmospheric and snow samples revealed excellent agreement, with least-squares regression lines with slopes of 1.72 (r(2) = 0.67) and 0.84 (r(2) = 0.93), respectively. However, the TSI technique is more accurate in quantifications of BC concentrations in both the atmosphere and seasonal snow, with an overall lower uncertainty. Using the improved TSI technique, we find that light absorption at a wavelength of 550 nm due to BC plays a dominant role relative to non-BC light absorption in both the atmosphere (62.76 %-91.84% of total light absorption) and seasonal snow (43.11 %-88.56 %) over northern China.
PublisherCOPERNICUS GESELLSCHAFT MBH
DOI10.5194/amt-13-39-2020
Indexed BySCIE
Language英语
Funding ProjectNational Natural Science Foundation of China[2019YFA0606801][41775144][41675065][41875091]
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000506334600001
PublisherCOPERNICUS GESELLSCHAFT MBH
Original Document TypeArticle
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Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/418126
Collection兰州大学
Corresponding AuthorWang, Xin
Affiliation
1.Lanzhou Univ, Key Lab Semiarid Climate Change, Minist Educ, Lanzhou 730000, Gansu, Peoples R China
2.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China
3.Jilin Weather Modificat Off, Changchun 132000, Jilin, Peoples R China
Recommended Citation
GB/T 7714
Wang, Xin,Zhang, Xueying,Di, Wenjing. Development of an improved two-sphere integration technique for quantifying black carbon concentrations in the atmosphere and seasonal snow[J]. Atmospheric Measurement Techniques,2020,13(1):39-52.
APA Wang, Xin,Zhang, Xueying,&Di, Wenjing.(2020).Development of an improved two-sphere integration technique for quantifying black carbon concentrations in the atmosphere and seasonal snow.Atmospheric Measurement Techniques,13(1),39-52.
MLA Wang, Xin,et al."Development of an improved two-sphere integration technique for quantifying black carbon concentrations in the atmosphere and seasonal snow".Atmospheric Measurement Techniques 13.1(2020):39-52.
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