scholarly journals Corrigendum to ‘Light absorption and fluorescence characteristics of water-soluble organic compounds in carbonaceous particles at a typical remote site in the southeastern Himalayas and Tibetan Plateau’ [Vol. 272, 1 March 2021, 116000]

2022 ◽  
Vol 293 ◽  
pp. 118576
Author(s):  
Chao Zhang ◽  
Meilian Chen ◽  
Shichang Kang ◽  
Fangping Yan ◽  
Xiaowen Han ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Organic Compounds ◽  
Light Absorption ◽  
Water Soluble ◽  
Remote Site ◽  
Carbonaceous Particles ◽  
Fluorescence Characteristics

Light absorption and fluorescence characteristics of water-soluble organic compounds in carbonaceous particles at a typical remote site in the southeastern Himalayas and Tibetan Plateau

2021 ◽  
Author(s):  
Chao Zhang ◽  
Meilian Chen ◽  
Shichang Kang ◽  
Fangping Yan ◽  
Chaoliu Li
Keyword(s):  
Tibetan Plateau ◽  
Organic Carbon ◽  
South Asia ◽  
Light Absorption ◽  
Fluorescence Analysis ◽  
Water Soluble ◽  
The Tibetan Plateau ◽  
Remote Site ◽  
Carbonaceous Particles ◽  
Fluorescence Characteristics

<p>Carbonaceous particles play an important role in climate change, and the increase in their emission and deposition causes glacier melting in the Himalayas and the Tibetan Plateau (HTP). This implies that studying their basic characteristics is crucial for a better understanding of the climate forcing observed in this area. Thus, we investigated characteristics of carbonaceous particles at Yaze village, a typical remote site of southeastern HTP.  The results showed that the organic carbon and elemental carbon concentrations at this study site were 1.86 ± 0.84 and 0.18 ± 0.09 μg m<sup>-3</sup>, respectively, which were much lower than those reported for other frequently monitored stations in the same region. Thus, these values reflect the background characteristics of the study site. Additionally, the absorption coefficient per mass (α/ρ) of water-soluble organic carbon (WSOC) at 365 nm was 0.60 ± 0.19 m<sup>2</sup> g<sup>-1</sup>, which was lower than those reported for other remote stations in the HTP. This value could be attributed to a lower and higher contribution of mineral dust and secondary organic carbon, respectively. Multi-dimensional fluorescence analysis showed that the WSOC consisted of approximately 37% and 63% protein and humic-like components, respectively, and the latter was identified as the determining component of light absorption ability of the WSOC. Combined the significant relationships between WSOC and sulfate ion, potassium ion, and nitrate ion with the air masses at the study site originated primarily from South Asia, it is suggested that the levels of carbonaceous particles in Yaze village were predominantly influenced by emissions from South Asia.</p>

The characteristics of inorganic gases and volatile organic compounds at a remote site in the Tibetan Plateau

2020 ◽  
Vol 234 ◽  
pp. 104740
Author(s):  
Ruojie Zhao ◽  
Xiaoyan Dou ◽  
Nan Zhang ◽  
Xueyan Zhao ◽  
Wen Yang ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Tibetan Plateau ◽  
Organic Compounds ◽  
The Tibetan Plateau ◽  
Remote Site ◽  
Volatile Organic

Fluorescence characteristics of particulate water-soluble organic compounds emitted from coal-fired boilers

2020 ◽  
Vol 223 ◽  
pp. 117297 ◽  
Author(s):  
Yanrong Yang ◽  
Juanjuan Qin ◽  
Ting Qi ◽  
Xueming Zhou ◽  
Rongzhi Chen ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Water Soluble ◽  
Fluorescence Characteristics

scholarly journals Quantifying the light absorption and source attribution of insoluble light-absorbing particles on Tibetan Plateau glaciers between 2013 and 2015

2019 ◽  
Vol 13 (1) ◽  
pp. 309-324 ◽  
Author(s):  
Xin Wang ◽  
Hailun Wei ◽  
Jun Liu ◽  
Baiqing Xu ◽  
Mo Wang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Light Absorption ◽  
Chemical Elements ◽  
Melting Process ◽  
Integrating Sphere ◽  
The Tibetan Plateau ◽  
Source Attribution ◽  
Carbonaceous Particles ◽  
Mean Values ◽  
Mixing Ratios

Abstract. The deposition of insoluble light-absorbing particles (ILAPs) on snow and ice surfaces can significantly reduce albedo, thereby accelerating the melting process. In this study, 67 ice samples were collected from seven glaciers located on the Tibetan Plateau (TP) between May 2013 and October 2015. The mixing ratios of black carbon (BC), organic carbon (OC), and mineral dust (MD) were measured with an integrating sphere/integrating sandwich spectrophotometer (ISSW) system, which assumes that the light absorption of MD is due to iron oxide (Fe). Our results indicate that the mass-mixing ratios of BC, OC, and Fe exhibit considerable variability (BC: 10–3100 ng g−1; OC: 10–17 000 ng g−1; Fe: 10–3500 ng g−1) with respective mean values of 220±400 ng g−1, 1360±2420 ng g−1, and 240±450 ng g−1 over the course of the field campaign. We observed that for wavelengths of 450–600 nm, the measured light absorption can be largely attributed to the average light absorption of BC (50.7 %) and OC (33.2 %). Chemical elements and selected carbonaceous particles were also analyzed for source attributions of particulate light absorption based on a positive matrix factorization (PMF) receptor model. Our findings indicate that on average, industrial pollution (33.1 %), biomass or biofuel burning (29.4 %), and MD (37.5 %) constitute the principal sources of ILAPs deposited on TP glaciers.

Chemical composition and light absorption of brown carbon emitted from residential coal combustion in China

2020 ◽  
Author(s):  
Jianzhong Song ◽  
Meiju Li ◽  
Xingjun Fan ◽  
Peng'an Peng
Keyword(s):  
Organic Carbon ◽  
Organic Compounds ◽  
Biomass Burning ◽  
Light Absorption ◽  
Coal Combustion ◽  
Extraction Methods ◽  
Water Soluble ◽  
Brown Carbon ◽  
Smoke Particles ◽  
Soluble Organic Carbon

<p>Brown carbon (BrC) is a type of light-absorbing organic compounds with a high capacity to absorb light in the low-wavelength visible and near-ultraviolet regions, which is ubiquitous in atmospheric aerosols, rainwater, and cloudwater samples. BrC can not only alter the light absorption and radiative forcing of aerosols but can also influence the formation of cloud condensation nuclei; therefore, it has a potential impact on atmospheric chemistry and climate change. Numerous studies have demonstrated that combustion processes are significant sources of atmospheric BrC, however most of these studies were focused on the emissions of biomass burning. Knowledge of primary BrC from coal combustion is still limited. In the study, smoke particles emitted from the combustion of residential coals with different geological maturity were collected in a combustion system. Then BrC fractions, including water soluble organic carbon (WSOC), water soluble humic-like substances (HULIS<sub>w</sub>), alkaline soluble organic carbon (ASOC) and methanol soluble organic carbon (MSOC) were extracted and characterized for their abundances, chemical, and light absorption properties.</p><p> </p><p>Our results showed that the abundance and light absorption of the coal combustion-derived BrC fractions were strongly dependent on the extraction methods used and the coal maturity. The abundances of MSOC fraction was significantly higher than WSOC and ASOC fractions and even higher than the sum of WSOC and ASOC, indicating that most organic compounds in smoke particles were soluble in pure methanol. The WSOC and MSOC fractions from the combustion of low maturity coal had relatively low SUVA<sub>254</sub> and MAE<sub>365</sub> values, indicated that they had relatively low levels of aromatic structures and light absorption.</p><p> </p><p>The WSOC and MSOC fractions were characterized by ultrahigh-resolution mass spectrometry. The results showed that S-containing compounds (CHOS and CHONS) are found to be the dominant components of the WSOC, whereas CHO and CHON compounds make a great contribution to the MSOC samples. Noted that a greater abundance of S-containing compounds was found in the smoke produced from coal combustion compared to biomass burning and atmospheric samples, indicated that coal combustion could be an important source of atmospheric S-containing compounds in certain areas. The findings also suggest that organic molecules with a high aromaticity index and low polarity showed stronger light absorption. In summary, our study indicated that coal combustion is a potential source of atmospheric BrC and their abundance, chemical, and light absorption were strongly dependent on the extraction methods used and the coal maturity.</p>

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