Browsing by Author "Nielsen, Chris"
Now showing items 1-20 of 28
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Accelerated Reduction in \(SO_2\) Emissions from the U.S. Power Sector Triggered by Changing Prices of Natural Gas
Lu, Xi; McElroy, Michael Brendon; Wu, Gang; Nielsen, Chris (American Chemical Society, 2012)Emissions of sulfur dioxide (\(SO_2\)) from the U.S. power sector decreased by 24% in 2009 relative to 2008. The Logarithmic Mean Divisia Index (LMDI) approach was applied to isolate the factors responsible for this decrease. ... -
Advantages of a city-scale emission inventory for urban air quality research and policy: the case of Nanjing, a typical industrial city in the Yangtze River Delta, China
Zhao, Y.; Qiu, L. P.; Xu, R. Y.; Xie, F. J.; Zhang, Q.; Yu, Y. Y.; Nielsen, Chris; Qin, H. X.; Wang, H. K.; Wu, X. C.; Li, W. Q.; Zhang, J. (Copernicus GmbH, 2015)With most eastern Chinese cities facing major air quality challenges, there is a strong need for city-scale emission inventories for use in both chemical transport modeling and the development of pollution control policies. ... -
Challenges faced by China compared with the US in developing wind power
Lu, Xi; McElroy, Michael Brendon; Peng, Wei; Liu, Shiyang; Nielsen, Chris; Wang, Haikun (Springer Nature, 2016)In the 21st Conference of the Parties held in Paris in December 2015, China pledged to peak its carbon emissions and increase non-fossil energy to 20% by 2030 or earlier. Expanding renewable capacity, especially wind power, ... -
China's CO2 emissions estimated from the bottom up: Recent trends, spatial distributions, and quantification of uncertainties
Zhao, Yu; Nielsen, Chris; McElroy, Michael Brendon (Elsevier BV, 2012)China’s emissions of anthropogenic CO2 are estimated using a bottom-up emission inventory framework based on a detailed categorization of economic sectors and provincial economic and energy data. It includes a newly compiled ... -
China’s CO2 Peak Before 2030 Implied From Characteristics and Growth of Cities
Lu, Xi; Deng, Yu; Sun, Yaoguang; Liu, Yifan; Zhu, Ge; Bu, Maoliang; Bi, Jun; McElroy, Michael; Wang, Haikun; Nielsen, Chris (Springer Science and Business Media LLC, 2019-07-29)China pledges to peak CO2 emissions by 2030 or sooner under the Paris Agreement to limit global warming to 2 °C or less by the end of the century. By examining CO2 emissions from 50 Chinese cities over the period 2000–2016, ... -
CO emissions in China: Uncertainties and implications of improved energy efficiency and emission control
Zhao, Yu; Nielsen, Chris; McElroy, Michael Brendon; Zhang, Lin; Zhang, Jie (Elsevier BV, 2012)A bottom-up methodology and an improved database of emission factors combining the latest domestic field measurements are developed to estimate the emissions of anthropogenic CO from China at national and provincial levels. ... -
CO2 and its correlation with CO at a rural site near Beijing: implications for combustion efficiency in China
Wang, Y.; Munger, J. W.; Xu, S.; McElroy, Michael Brendon; Hao, J.; Nielsen, Chris; Ma, H. (Copernicus GmbH, 2010)Although China has surpassed the United States as the world's largest carbon dioxide emitter, in situ measurements of atmospheric CO2 have been sparse in China. This paper analyzes hourly CO2 and its correlation with CO ... -
The effects of energy paths and emission controls and standards on future trends in China's emissions of primary air pollutants
Zhao, Y.; Zhang, J.; Nielsen, Chris (Copernicus GmbH, 2014)To examine the efficacy of China’s actions to control atmospheric pollution, three levels of growth of energy consumption and three levels of implementation of emission controls are estimated, generating a total of nine ... -
The effects of recent control policies on trends in emissions of anthropogenic atmospheric pollutants and CO2 in China
Zhao, Y.; Zhang, Junying; Nielsen, Chris (Copernicus GmbH, 2013)To examine the effects of China's national policies of energy conservation and emission control during 2005–2010, inter-annual emission trends of gaseous pollutants, primary aerosols, and CO2 are estimated with a bottom-up ... -
Emission trends and mitigation options for air pollutants in East Asia
Wang, S. X.; Zhao, B.; Cai, S. Y.; Klimont, Z.; Nielsen, Chris; McElroy, Michael Brendon; Morikawa, T.; Woo, J. H.; Kim, Y.; Fu, X.; Xu, J. Y.; Hao, J. M.; He, K. B. (Copernicus GmbH, 2014)Emissions of air pollutants in East Asia play an important role in the regional and global atmospheric environment. In this study we evaluated the recent emission trends of sulfur dioxide (SO<sub>2</sub>), nitrogen oxides ... -
Evaluating the effects of China's pollution controls on inter-annual trends and uncertainties of atmospheric mercury emissions
Zhao, Y.; Zhong, H.; Zhang, J.; Nielsen, Chris (Copernicus GmbH, 2015)China’s anthropogenic emissions of atmospheric mercury (Hg) are effectively constrained by national air pollution control and energy efficiency policies. In this study, improved methods, based on available data from domestic ... -
The impact of power generation emissions on ambient PM2.5 pollution and human health in China and India
Gao, Meng; Beig, Gufran; Song, Shaojie; Zhang, Hongliang; Hu, Jianlin; Ying, Qi; Liang, Fengchao; Liu, Yang; Wang, Haikun; Lu, Xiao; Zhu, Tong; Carmichael, Gregory R.; Nielsen, Chris; McElroy, Michael (Elsevier BV, 2018-12)Emissions from power plants in China and India contain a myriad of fine particulate matter (PM2.5, PM≤2.5 micrometers in diameter) precursors, posing significant health risks among large, densely settled populations. Studies ... -
The impact of Production Tax Credits on the profitable production of electricity from wind in the U.S.
Lu, Xi; Tchou, Jeremy; McElroy, Michael Brendon; Nielsen, Chris (Elsevier BV, 2011)A spatial financial model using wind data derived from assimilated meteorological condition was developed to investigate the profitability and competitiveness of onshore wind power in the contiguous U.S. It considers not ... -
The Influence of Neighborhood Types on Active Transport in China’s Growing Cities
Guan, ChengHe; Srinivasan, Sumeeta; Zhang, Bo; Da, Liangjun; Liu, Jialin; Nielsen, Chris (Elsevier BV, 2020-03)Rapid urban expansion in China has created both opportunities and challenges for promoting active transport in urban residential communities. Previous studies have shown that the urban form at the city scale has affected ... -
An inventory of primary air pollutants and CO2 emissions from cement production in China, 1990–2020
Lei, Yu; Zhang, Qiang; Nielsen, Chris; He, Kebin (Elsevier BV, 2011)Direct emissions of air pollutants from the cement industry in China were estimated by developing a technology-based methodology using information on the proportion of cement produced from different types of kilns and the ... -
Multiple effects and uncertainties of emission control policies in China: Implications for public health, soil acidification, and global temperature
Zhao, Yu; McElroy, Michael Brendon; Xing, Jia; Lei, Yu; Duan, Lei; Nielsen, Chris; Hao, Jiming (Elsevier BV, 2011)Policies to control emissions of criteria pollutants in China may have conflicting impacts on public health, soil acidification, and climate. Two scenarios for 2020, a base case without anticipated control measures and a ... -
Optimal Integration of Offshore Wind Power for a Steadier, Environmentally Friendlier, Supply of Electricity in China
Lu, Xi; McElroy, Michael Brendon; Nielsen, Chris; Chen, Xinyu; Huang, Junling (Elsevier, 2013)Demand for electricity in China is concentrated to a significant extent in its coastal provinces. Opportunities for production of electricity by on-shore wind facilities are greatest however in the north and west of the ... -
Ozone Air Quality During the 2008 Beijing Olympics: Effectiveness of Emission Restrictions
Wang, Yuxuan; Hao, Jiming; McElroy, Michael Brendon; Munger, J. William; Ma, Hong; Chen, Dan; Nielsen, Chris (Copernicus Publications, 2009)A series of aggressive measures was launched by the Chinese government to reduce pollutant emissions from Beijing and surrounding areas during the Olympic Games. Observations at Miyun, a rural site 100 km downwind of the ... -
Patterns in atmospheric carbonaceous aerosols in China: emission estimates and observed concentrations
Cui, H.; Mao, P.; Zhao, Y.; Nielsen, Chris; Zhang, J. (Copernicus GmbH, 2015)China is experiencing severe carbonaceous aerosol pollution driven mainly by large emissions resulting from intensive use of solid fuels. To gain a better understanding of the levels and trends of carbonaceous aerosol ... -
Potential for Wind-Generated Electricity in China
McElroy, Michael Brendon; Lu, Xi; Nielsen, Chris; Wang, Yuxuan (American Association for the Advancement of Science, 2009)Wind offers an important alternative to coal as a source of energy for generation of electricity in China with the potential for substantial savings in carbon dioxide emissions. Wind fields derived from assimilated ...