The international community has reached a consensus on the transition to a low-carbon economy, as climate change issues, characterized by global warming, have continued to attract widespread attention (Aldy and Stavins, 2012; Liu Weidong et al., 2016; Peters et al., 2013; Shen and Sun, 2016). China has become one of the world’s largest energy consumers and leading emitters of greenhouse gases (GHGs) (Feng et al., 2013; Wang et al., 2014b). The carbon emissions problem now receives extensive and continued attention from policy makers, industrial manufacturers, and researchers, due to the pressure from international climate negotiations. The need for energy conservation and emissions reductions due to the constraints in domestic resources and the environment is also effective in drawing attention to the carbon emissions problem (Cyranoski, 2007; Piao et al., 2010; Qiu, 2008, 2009, 2011; Streets et al., 2001; Zeng et al., 2008). Hence, the government of China is committed, as declared at the 2009 Copenhagen Summit, to reduce the carbon dioxide intensity per unit Gross Domestic Product (GDP) in 2020 by 40%-45% from the 2005 levels, and to increase the fraction of energy consumption of non-fossil fuel energy resources to 15% (Qiu, 2009). The 12th Five-Year Plan (2011-2015) of China proposed that the consumption of non-fossil fuel energy resources should be 11.4% of the total primary energy consumption, thus the per unit GDP energy consumption and per unit carbon dioxide emission should be reduced by 16% and 17%, respectively (Qiu, 2011). In 2013, the China State Council announced an energy consumption cap, equivalent to 4 billion tons of coal and in 2014, a United States- China joint announcement was made on climate change, with China pledging to achieve the carbon emissions reductions prior to 2030 (Malakoff, 2014). Therefore, in-depth studies on the factors influencing energy-related carbon emissions need to be performed, as the realization of a highly constraining carbon emissions reduction commitment while maintaining social stability and rapid economic development in the midst of China’s economic growth, industrialization, and urbanization poses great challenges. Priority industries for energy conservation and carbon emissions reductions should be identified in a scientific manner, thus promoting harmonious energy, environment, and socio-economic development. This further highlights the importance and urgency of the research on energy-related carbon emissions.
Current research on energy-related carbon emissions largely comprise the following aspects: estimation and accounting of total carbon emissions (Akimoto et al., 2006; Gregg et al., 2008; Le Quéré et al., 2009), factors influencing carbon emissions and their mechanism of action (Cheng et al., 2014; Chuai et al., 2012; Liu Yansui et al., 2016; Wang et al., 2017; Wang et al., 2015; Wang et al., 2016), scenario analyses and forecast of carbon emissions (O'Neill et al., 2010; Tollefson, 2015; Williams et al., 2012), and carbon emission reduction technologies, and policy simulations (Chu and Majumdar, 2012; He et al., 2016; Jiang et al., 2010; Wang et al., 2014a; Wang et al., 2013). The key to the formulation of carbon emissions reduction policies and implementation of scenario simulations however, lies in the identification and analyses of the influencing factors and drivers of carbon emissions. Previous studies have shown that a multitude of factors have an effect on energy-related carbon emissions, the most predominant ones being the rapid increase in energy consumption and rapid socio-economic development. Al-mulali et al. used panel data to perform a study on 30 Sub-Saharan African countries and demonstrated that energy consumption has a strong driving effect on economic development and carbon emissions growth (Al-mulali and Sab, 2012). Similarly, Al-mulali also performed an empirical study on the factors influencing carbon emissions in 12 countries in the Middle East, and concluded that the energy consumption, Foreign Direct Investment (FDI), and GDP constitute the most important factors influencing carbon emissions (Al-mulali, 2012). Li et al. used the Path-STIRPAT model to investigate the factors affecting carbon emissions in China and concluded that per capita GDP growth formed the most predominant factor (Li et al., 2011). Zhu et al. applied an input-output model to study the energy-related residential carbon emissions in China from 1992 to 2005 and showed that the continuous increase in household energy consumption levels played a key role in the growth of direct household carbon emissions (Zhu et al., 2012). Moreover, low-carbon optimizations in energy resources and industrial structures helped slow down the growth of carbon emissions (Zhang, 2003, 2006; Zhang et al., 2005). By conducting a comparative study of the long-term growth of developed and developing countries, Zhang found that the diversified development of economic structures results in slowing down the increase of energy consumption demands (Zhang, 2003). Moreover, Zhang analyzed the effects of changes in the energy resource structure and the evolution of industrial structures on the increase of total carbon emissions and on the spatial patterns in China by establishing assessment models on the respective association of industry-energy and energy-carbon emissions (Zhang, 2006). Wu et al. adopted a DEA model to show that continuous improvements in energy efficiency in China were primarily driven by technological advances (Wu et al., 2012). Li et al. employed the STIRPAT model to analyze the empirical factors impacting energy-related carbon emissions at the provincial level in China and showed that in most provinces, technological advances led to a decline in carbon emissions (Li et al., 2012). With the continued globalization of world economy, the impacts of international and regional trade on carbon emissions have received continuous attention. Thus, in addition to the improvement in production technologies and energy use efficiency, developing countries, such as China, should also intensify research on embodied carbon emissions related to imports and exports (Du et al., 2011; Su et al., 2013). All the factors influencing carbon emissions can be summarized as population, economy, energy, industry, technology, and policy.
Previous research on energy-related carbon emissions focused mostly on macroscopic regional levels such as the global, continental, and national levels and relatively few studies have been carried out on smaller scales, i.e., the provincial and city levels. From a geographical perspective, the eastern, central, and western regions, as well as various provinces, cities, and autonomous regions of China have significant disparities in population growth, household consumption, socio-economic development, energy resources endowments, and technological levels (Feng et al., 2013). Moreover, previous studies on mechanisms impact-
ing energy-related carbon emissions largely relied on econometric models to investigate the direct effects of various factors of carbon emissions other than the indirect effects from the perspective of the final demand level. Domestic research that analyzes the factors impacting
carbon emissions at the provincial and city levels has only recently begun emerging. This is highly significant in that the multi-factor mechanisms impacting carbon emissions that were previously obscured by regional differences can now be studied. These local studies will provide useful guidelines for the formulation of more targeted and workable regional policies for reducing carbon emissions (Geng et al., 2013; Liang and Zhang, 2011; Liu Zhu et al., 2012; Wang et al., 2014c; Wang et al., 2014; Wang et al., 2013; Xi et al., 2011). Liu et al. used an index decomposition analysis (IDA) to perform a comparative study on the factors affecting carbon emissions from 1995 to 2009 in four municipalities including Beijing, Shanghai, Tianjin, and Chongqing (Liu Zhu et al., 2012). Wang et al. used the LMDI model to perform a decomposition analysis of the factors affecting energy-related carbon emissions in Shandong Province from 1990 to 2009 and concluded that economic growth and population size were the most crucial factors of carbon emissions growth (Wang et al., 2014c). Wang et al. applied the STIRPAT model to analyze the factors of carbon emissions in Guangdong from 1980 to 2010 and found that the population size, level of urbanization, per capita GDP, and the level of industrialization to be the key factors (Wang et al., 2013). Wang et al. adopted the IDA model to analyze energy-related carbon emissions in Suzhou from 2005 to 2010 and demonstrated that the reduction in energy consumption intensity attributed to the energy resources and industrial restructuring proved conducive to the containment of growth in carbon emissions (Wang et al., 2014). The research of Xi et al. in Shenyang City revealed that the key sectors that should be targeted for carbon emissions reductions are the energy generation and processing industry, manufacturing industry, and construction industry (Xi et al., 2011). Liang et al. took the structural decomposition analysis (SDA) to perform a decomposition analysis of the factors impacting carbon emissions in the Eastern Coastal Manufacturing Center in Jiangsu Province. The study found that while reductions in energy consumption intensity and optimization of energy consumption structures were important, embodied carbon emissions from international trade should also be targeted for carbon emissions reductions in order to achieve low-carbon development in Jiangsu Province (Liang and Zhang, 2011). Geng et al. found that interprovincial trade outflow has a significant effect on the growth of carbon emissions, based on a decomposition analysis of factors impacting carbon emissions in the old industrial bases of Liaoning Province in Northeast China (Geng et al., 2013). Therefore, a thorough and wide-ranging study on the factors impacting carbon emissions at the provincial and city levels is urgently required to enable provincial contributions to the fulfillment of carbon emissions reduction pledges at the national level. Xinjiang is one of the major integrated energy bases of China and an important gateway for development in the western regions of China, as well as the core region of the Silk Road Economic Belt. Xinjiang is currently experiencing a strategic period of leapfrogging development; the fulfillment of constraining energy and carbon emissions reduction targets in an effective manner while maintaining stable socio-economic growth will be decisive for the harmonious energy, environment, and socio-economic development in Xinjiang.