Characterization of photosynthetic pathway of plant species growing in the eastern Tibetan plateau using stable carbon isotope composition

2006 ◽  
Vol 44 (1) ◽  
Author(s):  
M. C. Li ◽  
H. Y. Liu ◽  
X. F. Yi ◽  
L. X. Li
Keyword(s):  
Tibetan Plateau ◽  
Carbon Isotope ◽  
Plant Species ◽  
Isotope Composition ◽  
Stable Carbon Isotope ◽  
Carbon Isotope Composition ◽  
Photosynthetic Pathway ◽  
Stable Carbon ◽  
Eastern Tibetan Plateau

Stable carbon isotope composition and concentrations of CO2 and CH4 in the deep catotelm of a peat bog

2008 ◽  
Vol 72 (24) ◽  
pp. 6015-6026 ◽  
Author(s):  
Philipp Steinmann ◽  
Bernd Eilrich ◽  
Markus Leuenberger ◽  
Stephen J. Burns
Keyword(s):  
Carbon Isotope ◽  
Isotope Composition ◽  
Stable Carbon Isotope ◽  
Carbon Isotope Composition ◽  
Peat Bog ◽  
Stable Carbon ◽  
Stable Carbon Isotope Composition

scholarly journals Spatial Variation in Leaf Stable Carbon Isotope Composition of Three Caragana Species in Northern China

Forests ◽  
2018 ◽  
Vol 9 (6) ◽  
pp. 297 ◽  
Author(s):  
Fei Ma ◽  
Wenyu Liang ◽  
Zhaona Zhou ◽  
Guoju Xiao ◽  
Jili Liu ◽  
...  
Keyword(s):  
Spatial Variation ◽  
Carbon Isotope ◽  
Isotope Composition ◽  
Stable Carbon Isotope ◽  
Northern China ◽  
Carbon Isotope Composition ◽  
Stable Carbon ◽  
Stable Carbon Isotope Composition ◽  
Caragana Species

scholarly journals High time-resolved measurement of stable carbon isotope composition in water-soluble organic aerosols: method optimization and a case study during winter haze in East China

2018 ◽  
Author(s):  
Wenqi Zhang ◽  
Yan-Lin Zhang ◽  
Fang Cao ◽  
Yankun Xiang ◽  
Yuanyuan Zhang ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Carbon Isotope ◽  
Isotope Composition ◽  
Stable Carbon Isotope ◽  
Organic Aerosols ◽  
Carbon Isotope Composition ◽  
Water Soluble ◽  
High Time ◽  
Stable Carbon ◽  
Air Mass

Abstract. Water soluble organic carbon (WSOC) is a significant fraction of organic carbon (OC) in atmospheric aerosols. WSOC is of great interest due to its significant effects on atmospheric chemistry, the Earth’s climate and human health. Stable carbon isotope (δ13C) can be used to track the potential sources and investigate atmospheric processes of organic aerosols. In this study, a method of simultaneously measuring the mass concentration and δ13C values of WSOC from aerosol samples is established by coupling the Gas Bench II preparation device with isotopic ratio mass spectrometry. The precision and accuracy of isotope determination is better than 0.17 ‰ and 0.5 ‰, respectively, for samples containing carbon larger than 5 μg. This method is then applied for the high time-resolution aerosol samples during a severe wintertime haze period in Nanjing, East China. WSOC varies between 3–32 μg m−3, whereas δ13C-WSOC ranges from −26.24 ‰ to −23.35 ‰. Three different episodes (e.g., namely the Episode 1, the Episode 2, the Episode 3) are identified in the sampling period, showing a different tendency of δ13C-WSOC with the accumulation process of WSOC aerosols. The increases in both the WSOC mass concentrations and the δ13C-WSOC values in the Episode 1 indicate that WSOC is subject to a substantial photochemical aging during the air mass transport. In the Episode 2, the decline of the δ13C-WSOC is accompanied by the increase in the WSOC mass concentrations, which is associated with regional-transported biomass burning emissions. In the Episode 3, heavier isotope (13C) is exclusively enriched in total carbon (TC) compares to WSOC aerosols. This suggests that water-insoluble carbon may contain 13C-enriched components such as dust carbonate which is supported by the enhanced Ca2+ concentrations and air mass trajectories analysis. The present study provides a novel method to determine stable carbon isotope composition of WSOC and it offers a great potential to better understand the source emission, the atmospheric aging and the secondary production of water soluble organic aerosols.

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