气候变化领域集成服务门户(CCPortal): Temporal and Spatial Characteristics of CO2 Flux in Plateau Urban Wetlands and Their Influencing Factors Based on Eddy Covariance Technique

CCPortal

DOI	10.3390/w13091176
	Temporal and Spatial Characteristics of CO2 Flux in Plateau Urban Wetlands and Their Influencing Factors Based on Eddy Covariance Technique
	Wu, Yi; Mao, Xufeng; Zhang, Zhifa; Tang, Wenjia; Cao, Guangchao; Zhou, Huakun; Ma, Jianhai; Yin, Xinan
通讯作者	Mao, XF (通讯作者)，Qinghai Normal Univ, Acad Plateau Sci & Sustainabil, Sch Geog Sci, Xining 810008, Peoples R China. ; Mao, XF (通讯作者)，Qinghai Prov Key Lab Phys Geog & Environm Proc, MOE Key Lab Tibetan Plateau Land Surface Proc & E, Xining 810008, Peoples R China.
发表日期	2021
EISSN	2073-4441
卷号	13 期号:9
英文摘要	Urban wetlands, an important part of the urban ecosystem, play an important role in regional carbon cycles and the carbon balance. To analyze the CO2 source and sink effects of plateau urban wetlands, based on the data measured by an eddy covariance instrument, the temporal and spatial characteristics of CO2 flux and their influencing factors in the urban wetland of Xining City in the Qinghai Province of China during a warm season (July to September 2020) were studied. The results show that: (1) On the daily scale, the CO2 flux exhibited an obvious U-type variation, characterized by strong uptake in the daytime and weak emission at night, with an average daily flux of -0.05 mg center dot m(-2)center dot s(-1). The CO2 uptake peak of the wetland took place at 13:00 (-0.62 mg center dot m(-2)center dot s(-1)), and the emission peak occurred at 23:30 (0.34 mg center dot m(-2)center dot s(-1)); (2) on the monthly scale, the CO2 flux of the wetland in the study period showed a net uptake each month. The flux increased month by month, and the maximum value occurred in September (-142.82 g center dot m(-2)center dot month(-1)); (3) from a spatial point of view, the river area showed a weak CO2 uptake (-0.07 +/- 0.03 mg center dot m(-2)center dot s(-1)), while the artificial wetland area showed a strong CO2 uptake (-0.14 +/- 0.03 mg center dot m(-2)center dot s(-1)). The former was significantly lower than the latter (p < 0.01); (4) the regression analysis results show that the CO2 flux was significantly correlated with PAR, VPD, T-soil, and SWC (p < 0.01). The relationships between the flux and PAR, T-soil, and SWC were rectangular hyperbola (y = 0.2304 - 2 x 10(-3)x/(0.9037 + 0.0022x), R-2 = 0.64), exponential (y = 0.046exp(0.091x), R-2 = 0.88), and quadratic (y = -0.0041x(2) + 0.1784x - 1.6946, R-2 = 0.83), respectively. Under the joint action of various environmental factors, the urban wetland ecosystem in plateau displayed a strong carbon sink function in warm seasons. This study can establish a data scaffold for the accurate estimation of carbon budget of this type of ecosystem.
关键词	GREENHOUSE-GAS EMISSIONS CARBON-DIOXIDE FLUXES CONSTRUCTED WETLANDS WATER-QUALITY ECOSYSTEM CH4 TEMPERATURE EXCHANGE METHANE DEPRESSION
英文关键词	CO2 flux; urban wetland; eddy covariance technique; plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
WOS类目	Environmental Sciences ; Water Resources
WOS记录号	WOS:000650861700001
来源期刊	WATER
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/255115
作者单位	[Wu, Yi; Mao, Xufeng; Cao, Guangchao] Qinghai Normal Univ, Acad Plateau Sci & Sustainabil, Sch Geog Sci, Xining 810008, Peoples R China; [Wu, Yi; Mao, Xufeng; Cao, Guangchao] Qinghai Prov Key Lab Phys Geog & Environm Proc, MOE Key Lab Tibetan Plateau Land Surface Proc & E, Xining 810008, Peoples R China; [Zhang, Zhifa] Management & Serv Ctr, Huangshui Natl Wetland Pk, Xining 810008, Peoples R China; [Tang, Wenjia] Environm Monitoring Ctr, Dept Ecol Environm Qinghai Prov, Xining 810008, Peoples R China; [Zhou, Huakun] Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Restorat Ecol Cold Reg Qinghai, Xining 810008, Peoples R China; [Ma, Jianhai] Qinghai Forest & Grass Bur, Xining 810008, Peoples R China; [Yin, Xinan] Beijing Normal Univ, Sch Environm Sci, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Wu, Yi,Mao, Xufeng,Zhang, Zhifa,et al. Temporal and Spatial Characteristics of CO2 Flux in Plateau Urban Wetlands and Their Influencing Factors Based on Eddy Covariance Technique[J]. 中国科学院西北生态环境资源研究院,2021,13(9).
APA	Wu, Yi.,Mao, Xufeng.,Zhang, Zhifa.,Tang, Wenjia.,Cao, Guangchao.,...&Yin, Xinan.(2021).Temporal and Spatial Characteristics of CO2 Flux in Plateau Urban Wetlands and Their Influencing Factors Based on Eddy Covariance Technique.WATER,13(9).
MLA	Wu, Yi,et al."Temporal and Spatial Characteristics of CO2 Flux in Plateau Urban Wetlands and Their Influencing Factors Based on Eddy Covariance Technique".WATER 13.9(2021).