气候变化领域集成服务门户(CCPortal): Energy and carbon fluxes from an oil sands pit lake

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DOI	10.1016/j.scitotenv.2020.141966
	Energy and carbon fluxes from an oil sands pit lake
	Clark M.G.; Drewitt G.B.; Carey S.K.
发表日期	2021
ISSN	489697
卷号	752
英文摘要	Currently, post-mining landscape plans in the Athabasca Oil Sand Region include large watersheds terminating in pit lakes. In 2012, Base Mine Lake (BML), was constructed with the aim of demonstrating technologies associated with lake reclamation in the region. This paper examines the first 6.5 years of lake-atmosphere energy and carbon exchange. Energetically, BML behaved similar to other northern lakes, storing large quantities of heat in the spring and releasing it in the fall as sensible and latent heat fluxes. At various times a hydrocarbon sheen formed on the lake, which may have suppressed evaporation. However, simple linear relationships failed to statistically quantify the impacts and more comprehensive modelling of the variability may be required. At daily scales, variability in evaporation was well explained by the product of vapour pressure deficit and wind speed as well as the available energy (R2 = 0.74), while sensible heat was explained by the product of wind speed and the difference in air and surface temperature as well as available energy (R2 = 0.85). Spring CH4 fluxes were high, particularly around ice melt, with a maximum flux of 3.3 g m−2 day−1. Otherwise fluxes were low, except during irregular periods. The peak flux of these periods occurred following ~58 h of continuously falling pressure, relating cyclone activity to these large periods of methane emissions. Annually, CO2 and CH4 fluxes were initially high, with median fluxes of 231 mg CO2 m−2 h−1 and 23 mg CH4 m−2 h−1 in 2014. However, the median fluxes reduced quickly and over the least three years of the study (2017 through 2019) the median fluxes declined to 36 mg CO2 m−2 h−1 and 10 mg CH4 m−2 h−1. Overall, BML behaves similar to other boreal lake ecosystems with above average carbon fluxes compared to other constructed reservoirs. © 2020 Elsevier B.V.
英文关键词	Carbon emissions; Eddy covariance; Evaporation; Mine closure; Oil sands; Pit lake
scopus关键词	Carbon; Carbon dioxide; Ecosystems; Evaporation; Oil sands; Storms; Wind; Athabasca oil sands; Available energy; Methane emissions; Mining landscapes; Sensible and latent heat fluxes; Simple linear relationship; Surface temperatures; Vapour pressure deficits; Lakes; carbon; hydrocarbon; methane; carbon dioxide; carbon emission; carbon flux; eddy covariance; energy flux; evaporation; hydrocarbon; lake; methane; oil sand; watershed; air pollution; air pressure; Article; atmospheric pressure; Canada; carbon footprint; conceptual framework; decision making; detection algorithm; energy; environmental impact; environmental reclamation; evaporation; gas exchange; heat; heat sensitivity; hurricane; lake; priority journal; spring; tar sand; vapor pressure; velocity; Alberta; Athabasca Oil Sands; Canada
来源期刊	Science of the Total Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177267
作者单位	Watershed Hydrology Group, School of Earth, Environment & Society, McMaster University, Hamilton, ON, Canada
推荐引用方式 GB/T 7714	Clark M.G.,Drewitt G.B.,Carey S.K.. Energy and carbon fluxes from an oil sands pit lake[J],2021,752.
APA	Clark M.G.,Drewitt G.B.,&Carey S.K..(2021).Energy and carbon fluxes from an oil sands pit lake.Science of the Total Environment,752.
MLA	Clark M.G.,et al."Energy and carbon fluxes from an oil sands pit lake".Science of the Total Environment 752(2021).