气候变化领域集成服务门户(CCPortal): Greenhouse gas fluxes from reservoirs determined by watershed lithology, morphometry, and anthropogenic pressure

CCPortal

DOI	10.1088/1748-9326/ab7467
	Greenhouse gas fluxes from reservoirs determined by watershed lithology, morphometry, and anthropogenic pressure
	León-Palmero E.; Morales-Baquero R.; Reche I.
发表日期	2020
ISSN	17489318
卷号	15 期号:4
英文摘要	Human population growth has increased the demand for water and clean energy, leading to the massive construction of reservoirs. Reservoirs can emit greenhouse gases (GHG) affecting the atmospheric radiative budget. The radiative forcing due to CO2, CH4, and N2O emissions and the relative contribution of each GHG in terms of CO2 equivalents to the total forcing is practically unknown. We determined simultaneously the CO2, CH4, and N2O fluxes in reservoirs from diverse watersheds and under variable human pressure to cover the vast idiosyncrasy of temperate Mediterranean reservoirs. We obtained that GHG fluxes ranged more than three orders of magnitude. The reservoirs were sources of CO2 and N2O when the watershed lithology was mostly calcareous, and the crops and the urban areas dominated the landscape. By contrast, reservoirs were sinks of CO2 and N2O when the watershed lithology was predominantly siliceous, and the landscape had more than 40% of forestal coverage. All reservoirs were sources of CH4, and emissions were determined mostly by reservoir mean depth and water temperature. The radiative forcing was substantially higher during the stratification than during the mixing. During the stratification the radiative forcings ranged from 125 mg CO2 equivalents m-2 d-1 to 31 884 mg CO2 equivalents m-2 d-1 and were dominated by the CH4 emissions; whereas during the mixing the radiative forcings ranged from 29 mg CO2 equivalents m-2 d-1 to 722 mg CO2 equivalents m-2 d-1 and were dominated by CO2 emissions. The N2O contribution to the radiative forcing was minor except in one reservoir with a landscape dominated by crops and urban areas. Future construction of reservoirs should consider that siliceous bedrocks, forestal landscapes, and deep canyons could minimize their radiative forcings. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	Human pressure; Land-use; Reservoir radiative forcing; Watershed lithology
语种	英语
scopus关键词	Atmospheric radiation; Budget control; Carbon dioxide; Crops; Forestry; Lithology; Mixing; Population statistics; Watersheds; Anthropogenic pressures; Greenhouse gas fluxes; Greenhouse gases (GHG); Human population growth; Radiative forcings; Relative contribution; Three orders of magnitude; Water temperatures; Greenhouse gases; anthropogenic effect; flux measurement; greenhouse gas; lithology; morphometry; population growth; radiative forcing; reservoir; watershed
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154064
作者单位	Instituto Del Agua and Departamento de Ecología, Universidad de Granada, Granada, E-18071, Spain; Research Unit Modeling Nature (MNat), Universidad de Granada, Granada, E-18071, Spain
推荐引用方式 GB/T 7714	León-Palmero E.,Morales-Baquero R.,Reche I.. Greenhouse gas fluxes from reservoirs determined by watershed lithology, morphometry, and anthropogenic pressure[J],2020,15(4).
APA	León-Palmero E.,Morales-Baquero R.,&Reche I..(2020).Greenhouse gas fluxes from reservoirs determined by watershed lithology, morphometry, and anthropogenic pressure.Environmental Research Letters,15(4).
MLA	León-Palmero E.,et al."Greenhouse gas fluxes from reservoirs determined by watershed lithology, morphometry, and anthropogenic pressure".Environmental Research Letters 15.4(2020).