| 151 | 0 | 26 |
| Downloads | Citas | Reads |
Lingjiao Lake in Wuhan City, a typical urban lake, was selected for study and we investigated diurnal variation of the partial pressure of carbon dioxide( ■ : disselved CO2 concentration) in the lake and its relationship with environmental variables. Our aim was to provide a deeper understanding of carbon dioxide exchange at the urban lake/air interface and support the formulation of emission reduction measures. In October 2023(autumn) and January 2024(winter), ■ was monitored continuously from 8:00 until 18:00 at three sampling sites using a non-dispersive infrared(NDIR) sensor according to the following schedule: Site 1(S1), October 21 and January 5; Site 2(S2), October 28 and January 3; Site 3(S3), October 29 and January 4. The water environmental parameters influencing ■ were determined hourly during the time that ■ was being monitored. Results show that the mean values of ■ in Lingjiao Lake varied with season and the average ■ in autumn [(19.72±24.18) μ mol/L] was double that in winter [(9.51±6.31) μ mol/L]. The ■ had a significant negative correlation with DO and pH, and a significant positive correlation with nutrients, including phosphate(PO43--P), nitrite nitrogen(NO2~--N),and nitrate nitrogen(NO3~--N). Generally, the ■ from 10:00 to 12:30 accurately reflected daytime CO2 content in Lingjiao Lake. However, the optimal sampling time changed with nutrient content. The significant differences between seasons and in diurnal patterns of ■ in Lingjiao Lake were primarily driven by nutrients, DO, and pH. Except for S3 in autumn, the daily average value of ■ at other sites can be replaced by values measured from 10: 00 to 12: 30. The optimal time for measuring ■ in Lingjiao Lake varied slightly, depending on water body characteristics and degree of eutrophication.
代晓颖,徐栋,武俊梅,等,2021.2015-2019年武汉市湖泊水质时空变化[J].湖泊科学,33(5):1415-1424.DAI X Y,XU D,WU J M,et al,2021.Spatiotemporal variations of water quality of lakes in Wuhan from 2015 to2019[J].Journal of Lake Sciences,33(5):1415-1424.
黄婷,王晓锋,刘婷婷,等,2021.城市小型景观水体CO2 与CH4排放特征及影响因素[J].生态学报,41(15):6024-6037.HUANG T,WANG X F,LIU T T,et al,2021.Spatiotemporal variations and influencing factors of CO2 and CH4emissions from urban small landscape waters[J].Acta Ecologica Sinica,41(15):6024-6037.
刘崎,汪磊,朱向冰,等,2022.基于非分散红外法的二氧化碳浓度检测综述[J].红外,43(7):1-7.
田小康,吴忠立,林斯静,等,2023.武汉市汤逊湖水-气界面CO2 通量昼间变化观测及其影响因素分析[J].第四纪研究,43(2):625-636.TIAN X K,WU Z L,LIN S J,et al,2023.Observation and influencing factors of day-time variation of CO2 flux at water-air interface in a largest urban lake Tangxun,Wuhan[J].Quaternary Sciences,43(2):625-636.
张谦,朱辉,2011.武汉市菱角湖水质污染特征及防治对策分析[J].安全与环境工程,18(6):46-48.ZHANG Q,ZHU H,2011.Analysis on the status and countermeasures of water pollutionof Lingjiao Lake in Wuhan[J].Safety and Environmental Engineering,18(6):46-48.
BORGES A V,DEIRMENDJIAN L,BOUILLON S,et al,2022.Greenhouse gas emissions from African lakes are no longer a blind spot[J].Science Advances,8(25):eabi8716.
CAMPBELL A D,FATOYINBO T,CHARLES S P,et al,2022.A review of carbon monitoring in wet carbon systems using remote sensing[J].Environmental Research Letters,17(2):025009.
COSTADONE L,SYTSMA M D,2022.Identification and characterization of urban lakes across the continental United States[J].Lake and Reservoir Management,38(2):126-138.
ERKKILÄK M,OJALA A,BASTVIKEN D,et al,2018.Methane and carbon dioxide fluxes over a lake:comparison between eddy covariance,floating chambers and boundary layer method[J].Biogeosciences,15(2):429-445.
GROENEVELD M,TRANVIK L,NATCHIMUTHU S,et al,2016.Photochemical mineralisation in a boreal brown water lake:considerable temporal variability and minor contribution to carbon dioxide production[J].Biogeosciences,13(13):3931-3943.
GU S J,LI S Y,SANTOS I R,2022.Anthropogenic land use substantially increases riverine CO2 emissions[J].Journal of Environmental Sciences,118:158-170.
HU W P,JØRGENSEN S E,ZHANG F B,et al,2011.A model on the carbon cycling in Lake Taihu,China[J].Ecological Modelling,222(16):2973-2991.
HUTTUNEN J T,ALM J,LIIKANEN A,et al,2003.Fluxes of methane,carbon dioxide and nitrous oxide in boreal lakes and potential anthropogenic effects on the aquatic greenhouse gas emissions[J].Chemosphere,52(3):609-621.
JIANG Z P,HYDES D J,HARTMAN S E,et al,2014.Application and assessment of a membrane-based pCO2 sensor under field and laboratory conditions[J].Limnology and Oceanography:Methods,12(4):264-280.
JOHNSON M S,BILLETT M F,DINSMORE K J,et al,2010.Direct and continuous measurement of dissolved carbon dioxide in freshwater aquatic systems:method and applications[J].Ecohydrology,3(1):68-78.
KAI J L,WANG J B,JU J T,et al,2024.High thermodynamical sensitivity of CO2 emissions from a large oligotrophichardwater lake (Nam Co) on the Tibetan Plateau[J].Science of the Total Environment,947:174682.
LEE P,XU Y J,2023.Can a eutrophic lake function as a carbon sink?Case study of a subtropical eutrophic lake in southern USA[J].Journal of Hydrology,625(PA):130071.
LI S Y,BUSH R T,SANTOS I R,et al,2018.Large greenhouse gases emissions from China’s lakes and reservoirs[J].Water Research,147:13-24.
LI X,XU Y J,NI M F,et al,2023.Riverine nitrate source and transformation as affected by land use and land cover[J].Environmental Research,222:115380.
LI Y,SHANG J H,ZHANG C,et al,2021.The role of freshwater eutrophication in greenhouse gas emissions:a review[J].Science of the Total Environment,768:144582.
LIU S,LIANG J,JIANG Z,et al,2024.Temporal and spatial variations of air-sea CO2 fluxes and their key influence factors in seagrass meadows of Hainan Island,South China Sea[J].Science of the Total Environment,910.
MÜLLER B,MEYER J S,GÄCHTER R,2016.Alkalinity regulation in calcium carbonate-buffered lakes[J].Limnology and Oceanography,61(1):341-352.
PERGA M E,MABERLY S C,JENNY J P,et al,2016.A century of human-driven changes in the carbon dioxide concentration of lakes[J].Global Biogeochemical Cycles,30(2):93-104.
PROVENZALE M,OJALA A,HEISKANEN J,et al,2018.High-frequency productivity estimates for a lake from free-water CO2 concentration measurements[J].Biogeosciences,15(7):2021-2032.
RAYMOND P A,HARTMANN J,LAUERWALD R,et al,2013.Global carbon dioxide emissions from inland waters[J].Nature,503(7476):355-359.
REGNIER P,FRIEDLINGSTEIN P,CIAIS P,et al,2013.Anthropogenic perturbation of the carbon fluxes from land to ocean[J].Nature Geoscience,6:597-607.
ROSIŃSKA J,KOZAK A,DONDAJEWSKA R,et al,2017.Cyanobacteria blooms before and during the restoration process of a shallow urban lake[J].Journal of Environmental Management,198:340-347.
SONG C Q,JIANG X G,FAN C Y,et al,2022.High-resolution circa-2020 map of urban lakes in China[J].Scientific Data,9(1):747.
TRANVIK L J,DOWNING J A,COTNER J B,et al,2009.Lakes and reservoirs as regulators of carbon cycling and climate[J].Limnology and Oceanography,54(6part2):2298-2314.
WANG X F,YU L L,LIU T T,et al,2022.Methane and nitrous oxide concentrations and fluxes from heavily polluted urban streams:comprehensive influence of pollution and restoration[J].Environmental Pollution,313:120098.
WANG Y,MA B J,SHEN S,et al,2024.Diel variability of carbon dioxide concentrations and emissions in a largest urban lake,Central China:insights from continuous measurements[J].Science of the Total Environment,912:168987.
XENOPOULOS M A,BARNES R T,BOODOO K S,et al,2021.How humans alter dissolved organic matter composition in freshwater:relevance for the Earth’s biogeochemistry[J].Biogeochemistry,154(2):323-348.
XIAO Q T,DUAN H T,QI T C,et al,2020.Environmental investments decreased partial pressure of CO2 in a small eutrophic urban lake:evidence from long-term measurements[J].Environmental Pollution,263:114433.
XU H,QIN B Q,PAERL H W,et al,2021.Environmental controls of harmful cyanobacterial blooms in Chinese inland waters[J].Harmful Algae,110:102127.
YAN X C,XU X G,WANG M Y,et al,2017.Climate warming and cyanobacteria blooms:looks at their relationships from a new perspective[J].Water Research,125:449-457.
YANG R J,CHEN Y Y,DU J,et al,2022.Daily variations in p CO2 and f CO2 in a subtropical urbanizing lake[J].Frontiers in Earth Science,9:805276.
ZHANG L Q,XU Y J,LI S Y,2023.Changes in CO2 concentration and degassing of eutrophic urban lakes associated with algal growth and decline[J].Environmental Research,237:117031.
ZHANG P P,JIAO R Y,GONG C,et al,2022a.Turnover of dissolved organic carbon fuels nocturnal CO2 emissions from a headwater catchment reservoir,Southeastern China:effects of ecosystem metabolism on source partitioning of CO2 emissions[J].Journal of Environmental Sciences,121:98-111.
ZHANG Z Z,YU R H,XIA X H,et al,2022b.Significant diurnal variation of CO2 flux from a shallow eutrophic lake:effects of submerged aquatic vegetation and algae bloom[J].Aquatic Sciences,84(4):62.
Basic Information:
DOI：10.15928/j.1674-3075.202409160001
China Classification Code:X143
Citation Information:
[1]WANG Yan,HUANG Xi,XU Jincheng ,et al.Diurnal Variation of ■ in Autumn and Winter at Lingjiao Lake Based on NDIR CO_2 Sensor Measurements[J].Journal of Hydroecology,2026,47(04):57-66.DOI:10.15928/j.1674-3075.202409160001.
Fund Information:
武汉工程大学高层次人才引进项目（21QD02,24QD26）; 国家自然科学基金（32102823）
2025-06-04
2025-06-04
2025-06-04