干旱区生态环境知识资源中心(Arid): Greenhouse gas emissions from an arid-zone reservoir and their environmental policy significance: Results from existing global models and an exploratory dataset

Arid

DOI	10.1016/j.envsci.2021.02.006
	Greenhouse gas emissions from an arid-zone reservoir and their environmental policy significance: Results from existing global models and an exploratory dataset
	Waldo, Sarah; Deemer, Bridget R.; Bair, Lucas S.; Beaulieu, Jake J.
通讯作者	Deemer, BR (corresponding author), US Geol Survey, Columbia River Res Lab, 5501A Cook Underwood Rd, Cook, WA 98605 USA.
来源期刊	ENVIRONMENTAL SCIENCE & POLICY
ISSN	1462-9011
EISSN	1873-6416
出版年	2021
卷号	120 页码:53-62
英文摘要	Reservoirs in arid regions often provide critical water storage but little is known about their greenhouse gas (GHG) footprint. While there is growing appreciation of the role reservoirs play as GHG sources, there is a lack of understanding of GHG emission dynamics from reservoirs in arid regions and implications for environmental policy. Here we present initial GHG emission measurements from Lake Powell, a large water storage reservoir in the desert southwest United States. We report CO2-eq emissions from the shallow (< 15 m) littoral regions of the reservoir that are higher than the global average areal emissions from reservoirs (9.4 vs. 5.8 g CO2-eq m-2 d-1) whereas fluxes from the main reservoir were two orders of magnitude lower (0.09 g CO2-eq m- 2 d-1). We then compared our measurements to modeled CO2 + CH4 emissions from the reservoir using four global scale models. Factoring these emissions into hydropower production at Lake Powell yielded low GHG emissions per MWh-1 as compared to fossil-fuel based energy sources. With the exception of one model, the estimated hydropower emissions for Lake Powell ranged from 10-32 kg CO2-eq MWh-1, compared to -400-1000 kg CO2-eq MWh-1 for natural gas, oil, and coal. We also estimate that reduced littoral habitat under low water levels leads to -50% reduction in the CO2 equivalent emissions per MWh. The sensitivity of GHG emissions to reservoir water levels suggests that the interaction will be an important policy consideration in the design and operation of arid region systems.
英文关键词	Hydroelectric reservoirs Methane Greenhouse gas Environmental policy Water level Arid
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000652746800006
WOS关键词	METHANE EBULLITION ; CH4 EMISSIONS ; CO2 EMISSIONS ; LAKE ; CYCLE ; VARIABILITY ; HYDROPOWER ; RELEASE ; DROUGHT
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350156
作者单位	[Waldo, Sarah; Beaulieu, Jake J.] US EPA, Off Res & Dev, 26 W Martin Luther King Dr, Cincinnati, OH 45268 USA; [Waldo, Sarah] US EPA, Reg 10,1200 Sixth Ave,Suite 155, Seattle, WA 98101 USA; [Deemer, Bridget R.; Bair, Lucas S.] US Geol Survey, Southwest Biol Sci Ctr, 2255 N Gemini Dr, Flagstaff, AZ 86001 USA
推荐引用方式 GB/T 7714	Waldo, Sarah,Deemer, Bridget R.,Bair, Lucas S.,et al. Greenhouse gas emissions from an arid-zone reservoir and their environmental policy significance: Results from existing global models and an exploratory dataset[J]. United States Geological Survey,2021,120:53-62.
APA	Waldo, Sarah,Deemer, Bridget R.,Bair, Lucas S.,&Beaulieu, Jake J..(2021).Greenhouse gas emissions from an arid-zone reservoir and their environmental policy significance: Results from existing global models and an exploratory dataset.ENVIRONMENTAL SCIENCE & POLICY,120,53-62.
MLA	Waldo, Sarah,et al."Greenhouse gas emissions from an arid-zone reservoir and their environmental policy significance: Results from existing global models and an exploratory dataset".ENVIRONMENTAL SCIENCE & POLICY 120(2021):53-62.