[1] Weissert LF, Salmond JA, Schwendenmann L. Variabi-lity of soil organic carbon stocks and soil CO2 efflux across urban land use and soil cover types. Geoderma, 2016, 271: 80-90 [2] Gao Y-Q (高韵秋), Liu S-D (刘寿东), Hu N (胡凝), et al. Direct observation on the temporal and spatial patterns of the CO2 concentration in the atmospheric of Nanjing urban canyon in summer. Environmental Science (环境科学), 2015, 36(7): 2367-2373 (in Chinese) [3] Wang C-K (王长科), Wang Y-S (王跃思), Liu G-R (刘广仁). Characteristics of atmospheric CO2 variations and some affecting factors in urban area of Beijing. Environmental Science (环境科学), 2003, 24(4): 13-17 (in Chinese) [4] Churkina G. Modeling the carbon cycle of urban systems. Ecological Modelling, 2008, 216: 107-113 [5] Coutts AM, Beringer J, Tapper NJ. Characteristics in fluencing the variability of urban CO2 fluxes in Melbourne, Australia. Atmospheric Environment, 2007, 41: 51-62 [6] Dou J-X (窦军霞), Miao S-G (苗世光), Li J (李 炬), et al. Study of carbon dioxide flux characteristics over an urban area in Beijing. Research of Environmental Sciences (环境科学研究), 2014, 27(1): 18-27 (in Chinese) [7] Zhang S, Wu Y, Liu H, et al. Real-world fuel consumption and CO2 emissions of urban public buses in Beijing. Applied Energy, 2014, 113: 1645-1655 [8] Worden HM, Cheng Y, Pfister G, et al. Satellite-based estimates of reduced CO and CO2 emissions due to traffic restrictions during the 2008 Beijing Olympics. Geophysical Research Letters, 2012, 39: L14802 [9] Jia Q-Y (贾庆宇), Wang Y (王 宇), Li L-G (李丽光). Progress on carbon flux in urban ecosystem and atmosphere. Ecology and Environmental Sciences (生态环境学报), 2011, 20(10): 1569-1574 (in Chinese) [10] Bowling DR, Pataki DE, Randerson JT. Carbon isotopes in terrestrial ecosystem pools and CO2 fluxes. New Phytologist, 2008, 178: 24-40 [11] Gessler A, Brandes E, Buchmann N, et al. Tracing carbon and oxygen isotope signals from newly assimilated sugars in the leaves to the tree-ring archive. Plant, Cell & Environment, 2009, 32: 780-795 [12] Zheng S-X (郑淑霞), Shangguan Z-P (上官周平). Terrestrial plant stable carbon isotope composition and global change. Chinese Journal of Applied Ecology (应用生态学报), 2006, 17(4): 733-739 (in Chinese) [13] Cernusak LA, Ubierna N, Winter K, et al. Environmental and physiological determinants of carbon isotope discrimination in terrestrial plants. New Phytologist, 2013, 200: 950-965 [14] Song L-N (宋立宁), Zhu J-J (朱教君), Li M-C (李明财), et al. Needles stable carbon isotope composition and traits of Pinus sylvestris var. mongolica in sparse wood grassland in south edge of Keerqin Sandy Land under the conditions of different precipitation. Chinese Journal of Applied Ecology (应用生态学报), 2012, 23(6): 1435-1440 (in Chinese) [15] Lu W-W (路伟伟), Yu X-X (余新晓), Jia G-D (贾国栋), et al. Tree-ring δ13C and water use efficiency of Platycladus orientalis in mountains of Beijing. Chinese Journal of Applied Ecology (应用生态学报), 2017, 28(7): 2128-2134 (in Chinese) [16] Fan T-L (樊廷录), Ma M-S (马明生),Wang S-Y (王淑英), et al. Stable carbon isotope ratio (δ13C) in flag leaves of different genotypes of winter wheat and its relation to yield and water use efficiency. Chinese Journal of Plant Ecology (植物生态学报), 2011, 35(2): 203-213 (in Chinese) [17] Liu M-X (刘旻霞), Liu Y-Y (刘洋洋), Chen S-W (陈世伟), et al. Variation in δ13C and water use efficiency of plant leaf at different slopes in an alpine mea-dow. Chinese Journal of Applied Ecology (应用生态学报), 2016, 27(12): 3816-3822 (in Chinese) [18] Liu Y (刘 莹), Li P (李 鹏), Shen B (沈 冰), et al. Effects of drought stress on Bothriochloa ischaemum water-use efficiency based on stable carbon isotope. Acta Ecologica Sinica (生态学报), 2017, 37(9): 3055-3064 (in Chinese) [19] Tang M-L (唐美玲), Wei L (魏 亮), Zhu Z-K (祝贞科), et al. Responses of organic carbon mineralization and priming effect to phosphorus addition in paddy soils. Chinese Journal of Applied Ecology (应用生态学报), 2018, 29(3): 857-864 (in Chinese) [20] Pang J, Wen X, Sun X. Mixing ratio and carbon isoto-pic composition investigation of atmospheric CO2 in Beijing, China. Science of the Total Environment, 2016, 539: 322-330 [21] Feng X (冯 雪), Wang S (王 森), Niu Z-C (牛振川). Variational characteristics of CO2 concentrations and δ13C values at the urban sites in Beijing and Xiamen, China. Journal of Earth Environment (地球环境学报), 2018, 9(4): 316-322 (in Chinese) [22] Idso SB, Idso CD, Balling Jr RC. Seasonal and diurnal variations of near-surface atmospheric CO2 concentration within a residential sector of the urban CO2 dome of Phoenix, AZ, USA. Atmospheric Environment, 2002, 36: 1655-1660 [23] Weissert LF, Salmond JA, Schwendenmann L. A review of the current progress in quantifying the potential of urban forests to mitigate urban CO2 emissions. Urban Climate, 2014, 8: 100-125 [24] Tang Y, Chen A, Zhao S. Carbon storage and sequestration of urban street trees in Beijing, China. Frontiers in Ecology and Evolution, 2016, 4: 53, doi: 10.3389/fevo.2016.00053 [25] Velasco E, Roth M, Norford L, et al. Does urban vegetation enhance carbon sequestration? Landscape and Urban Planning, 2016, 148: 99-107 [26] Ward HC, Kotthaus S, Grimmond CSB, et al. Effects of urban density on carbon dioxide exchanges: Observations of dense urban, suburban and woodland areas of southern England. Environmental Pollution, 2015, 198: 186-200 [27] Vaccari FP, Gioli B, Toscano P, et al. Carbon dioxide balance assessment of the city of Florence (Italy), and implications for urban planning. Landscape and Urban Planning, 2013, 120: 138-146 [28] Zhao Y-H (赵玉焕), Li H (李 浩), Liu Y (刘 娅), et al. Identifying driving forces of CO2 emissions in Beijing-Tianjin-Hebei region from temporal and spatial angles. Resources Science (资源科学), 2018, 40(1): 207-215 (in Chinese) [29] Amani-Beni M, Zhang B, Xie GD, et al. Impact of urban park’s tree, grass and waterbody on microclimate in hot summer days: A case study of Olympic Park in Beijing, China. Urban Forestry & Urban Greening, 2018, 32: 1-6 [30] Bush S, Pataki DE, Ehleringer JR. Sources of variation in δ13C of fossil fuel emissions in Salt Lake City, USA. Applied Geochemistry, 2007, 22: 715-723 [31] Vogt R, Christen A, Rotach M, et al. Temporal dyna-mics of CO2 fluxes and profiles over a Central European city. Theoretical and Applied Climatology, 2006, 84: 117-126 [32] Wang Y, Wang C, Guo X, et al. Trend, seasonal and diurnal variations of atmospheric CO2 in Beijing. Chinese Science Bulletin, 2002, 47: 2050-2055 [33] Hiller R, Zeeman MJ, Eugster W. Eddy-covariance flux measurements in the complex terrain of an alpine valley in Switzerland. Boundary-Layer Meteorology, 2008, 127: 449-467 [34] Contini D, Donateo A, Elefante C, et al. Analysis of particles and carbon dioxide concentrations and fluxes in an urban area: Correlation with traffic rate and local micrometeorology. Atmospheric Environment, 2012, 46: 25-35 [35] Lietzke B, Vogt R. Variability of CO2 concentrations and fluxes in and above an urban street canyon. Atmospheric Environment, 2013, 74: 60-72 [36] Kumar MK, Shiva Nagendra SM. Quantification of anthropogenic CO2 emissions in a tropical urban environment. Atmospheric Environment, 2016, 125: 272-282 [37] Pataki DE, Bowling DR, Ehleringer JR. Seasonal cycle of carbon dioxide and its isotopic composition in an urban atmosphere: Anthropogenic and biogenic effects. Journal of Geophysical Research: Atmospheres, 2003, 108: 4375, doi:10.1029/2003JD003865 [38] Fassbinder JJ, Griffis TJ, Baker JM. Interannual, seasonal, and diel variability in the carbon isotope composition of respiration in a C3/C4 agricultural ecosystem. Agricultural and Forest Meteorology, 2012, 153: 144-153 [39] Goffin S, Aubinet M, Maier M, et al. Characterization of the soil CO2 production and its carbon isotope composition in forest soil layers using the flux-gradient approach. Agricultural and Forest Meteorology, 2014, 188: 45-57 [40] Kèlomé NC, Lévêque J, Andreux F, et al. C4 plant isotopic composition (δ13C) evidence for urban CO2 pollution in the city of Cotonou, Benin (West Africa). Science of the Total Environment, 2006, 366: 439-447 [41] Clark-Thorne ST, Yapp CJ. Stable carbon isotope constraints on mixing and mass balance of CO2 in an urban atmosphere: Dallas metropolitan area, Texas, USA. Applied Geochemistry, 2003, 18: 75-95 [42] Li JF, Zhan JM, Li YS, et al. CO2 absorption/emission and aerodynamic effects of trees on the concentrations in a street canyon in Guangzhou, China. Environmental Pollution, 2013, 177: 4-12 [43] Bahn M, Schmitt M, Siegwolf R, et al. Does photosynthesis affect grassland soil-respired CO2 and its carbon isotope composition on a diurnal timescale? New Phyto-logist, 2009, 182: 451-460 [44] Schaeffer SM, Anderson DE, Burns SP, et al. Canopy structure and atmospheric flows in relation to the δ13C of respired CO2 in a subalpine coniferous forest. Agricultu-ral and Forest Meteorology, 2008, 148: 592-605 [45] Sun S-J (孙守家), Meng P (孟 平), Zhang J-S (张劲松), et al. Variations of CO2 concentration and δ13C and influencing factors of Quercus variabilis plantation in low hilly area of North China. Chinese Journal of Applied Ecology (应用生态学报), 2015, 26(2): 370-378 (in Chinese) [46] Bergeron O, Strachan IB. CO2 sources and sinks in urban and suburban areas of a northern mid-latitude city. Atmospheric Environment, 2011, 45: 1564-1573 [47] Nordbo A, Launiainen S, Mammarella I, et al. Long-term energy flux measurements and energy balance over a small boreal lake using eddy covariance technique. Journal of Geophysical Research, 2011, 116: D02119 [48] Helfter C, Famulari D, Phillips GJ, et al. Controls of carbon dioxide concentrations and fluxes above central London. Atmospheric Chemistry and Physics, 2011, 11: 1913-1928 [49] Moriwaki R, Kanda M. Seasonal and diurnal fluxes of radiation, heat, water vapor, and carbon dioxide over a suburban area. Journal of Applied Meteorology, 2004, 43: 1700-1710 |