期刊
GEOPHYSICAL RESEARCH LETTERS
卷 40, 期 19, 页码 5291-5294出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/grl.50967
关键词
power plant emissions; ozone production efficiency; climate penalty factor
资金
- Maryland Department of the Environment (MDE)
- NASA [NNX11AK34G, NNX12AI18G, NNX12AB10G]
- NASA [21475, NNX12AB10G, 30888, 143186, NNX11AK34G, NNX12AI18G] Funding Source: Federal RePORTER
High ambient temperatures intensify photochemical production of tropospheric ozone, leading to concerns that global warming may exacerbate smog episodes. This widely observed phenomenon has been termed the climate penalty factor (CPF). A variety of meteorological and photochemical processes have been suggested to explain why surface ozone increases on hot days. Here, we quantify an anthropogenic factor previously overlooked: the rise of ozone precursor emissions on hot summer days due to high electricity demand. Between 1997 and 2011, power plant emissions of NOx in the eastern U.S. increased by 2.5-4.0%/degrees C, raising surface NOx concentrations by 0.10-0.25ppb/degrees C. Given an ozone production efficiency (OPE) of 8mol/mol based on the 2011 NASA DISCOVER-AQ campaign, at least one third of the CPF observed in the eastern U.S. can be attributed to the temperature dependence of NOx emissions. This finding suggests that controlling emissions associated with electricity generation on hot summer days can mitigate the CPF.
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