气候变暖的第一影响因素及我国的应对

全球气候变暖已是人们逐渐接受的事实,由于大气中二氧化碳等气体含量的升高引起的温室效应是导致全球气温变暖的显著原因。经过统计分析发现,大气中碳含量的增加与全球森林面积减少、化石能源燃烧增加的碳排放高度相关,但年均0.4%增速的大气中的碳含量是与按年均0.2%速度递减的全球森林面积存在显著的统计上的因果关系,乱砍滥伐、开发耕地等导致的全球森林面积的减少是大气中二氧化碳含量增加的格兰杰因果关系原因,从而构成全球变暖的第一影响因素。二氧化碳排放量的增加一直比较平稳,年增速在2.2%左右,它与大气中的碳含量的增加虽然相关,但因果关系统计上并不显著,也不是其格兰杰因果关系原因,这一结论与IPCC的报告中二氧化碳排放量是全球变暖的主要原因的结论并不完全一致。据此,我们提出中国应对全球变暖时谨防陷入碳排放陷阱。     

全球气候变暖与节能的紧迫性

全球气候变暖已对人类生产与生活产生了很大的影响,文章利用统计实证的方法验证了二氧化碳气体排放与全球平均气温变化之间的关系,利用相关、回归与Granger因果关系检验,得出近年来二氧化碳排放量的增加是导致全球气候变暖的主要原因,而煤炭、石油、天然气消费量的增加又是引起全球二氧化碳排放量增加的主要原因。因此,节约能源,控制二氧化碳的排放,是应对全球气候变暖的必由之路。     

我国能源消耗和二氧化碳排放的历史特征研究

过去50年是全球气候变暖最显著的50年,全球气候变化已经成为国际社会最为关注的问题。我国是世界上最大的发展中国家,二氧化碳总排放量已经跃居世界第一,担负着减少二氧化碳排放,遏制全球气候变暖的重任。文章采用表观能耗估算法对我国大陆地区的历史能源消耗产生的二氧化碳排放清单进行了估算。研究结果显示,我国以煤为主的能源结构和经济发展优先的发展模式导致了我国巨大的二氧化碳排放量,虽然二氧化碳排放总量每年递增,但是单位GDP产生的二氧化碳排放强度却比较低,呈逐年递减的趋势,人均二氧化碳排放量水平相对发达国家也较低。文章研究结论为我国能源安全和生态环境的可持续发展提供了研究基础。     

Methane and Nitrous Oxide Emissions from Agriculture in the EU: A Spatial Assessment of Sources and Abatement Costs

Agriculture significantly contributes to emissions of greenhouse gases in the EU. By using a farm-type, supply-side oriented, linear-programming model of the European agriculture, the baseline levels of methane and nitrous oxide emissions are assessed at the regional level in the EU-15. For a range of CO₂-equivalent prices, we assess the potential abatement, as well as the resulting optimal mix of emission sources in the total abatement. Furthermore, we show that the spatial variability of the abatement achieved at a given carbon price is large, indicating that abatement cost heterogeneity is a fundamental feature in the design of a mitigation policy. The cost savings permitted by market-based instruments relative to uniform standard are shown to be large.     

科技对我国区域碳排放的影响分析

通过测算全国30个省/市2002—2011年的碳排放量,并进行碳排放区域划分,将30个省/市按照碳集中度划分为重度、中度和轻度碳排放区域。利用STIRPAT扩展模型,并采用SPSS岭回归方法对3个碳排放区域的碳排放进行了影响因素分析。分析表明:经济增长仍是影响碳排放的主要因素;我国在低碳技术的投入和发展上还比较落后,使得整体科技进步所带来的碳排放的增加量比利用科技手段减排的CO_2要多。     

新兴经济体国家城镇化发展对碳排放影响的比较研究

新兴经济体十六国是重要的发展集团,由“金砖五国”和“新钻十一国”组成,高效低碳的城镇化是其进一步提升在全球经济发展中增量贡献的动力保障。借助EKC模型和STIRPAT模型,分别研究这两个国家集团城镇化发展与碳排放量之间的关系以及城镇化对碳排放的影响。研究结果表明：在二者的关系方面,新兴经济体国家的城镇化水平与碳排放量呈现出微弱的倒“U”型关系,其中,“金砖五国”已经跨过倒“U”型曲线的拐点,而“新钻十一国”则处于拐点前期;在城镇化对碳排放的影响方面,城镇化发展对“新钻十一国”碳排放量的影响大于“金砖五国”;城镇化水平越高的国家,碳排放量越大,但随着工业化水平的提升和产业结构的优化升级,碳排放量逐步降低。     

Economic Growth and CO2 Emissions in the European Union

This paper examines the relationship between economic growth and CO₂ emissions in the European Union. A panel data analysis for the period 1981 to 1995 is applied in order to estimate the relationship between Gross Domestic Product (GDP) growth and CO₂ emissions in ten selected European countries. The analysis shows important disparities between the most industrialised countries and the rest. The results do not seem to support a uniform policy to control emissions; they rather indicate that a reduction in emissions should be achieved by taking into account the specific economic situation and the industrial structure of each EU member state.     

中国2020年二氧化碳排放情景分析

本文利用中国科学技术信息研究所和美国千年研究所开发的中国可持续发展模型,对我国2020年的CO2排放情景进行定量分析,来模拟与验证如何达到2020年单位GDP二氧化碳排放比2005年下降40％～45％的减排目标。报告设定了技术进步、生活方式改变、价格调整、产业结构调整等几个情景。分析发现,如果要降低CO2排放总量,最好的途径就是加快技术进步、加大可再生能源和核电的比例。要实现二氧化碳排放强度的目标,最好的途径就是实现产业结构调整。     

Global Warming and German Agriculture Impact Estimations Using a Restricted Profit Function

This study uses the concept of shadow prices formeasuring the impacts of climate change. By estimatinga restricted profit function rather than a cost or aproduction function the explanatory power of the modelis increased because of an endogenous outputstructure. Using low aggregated panel data on WesternGerman farmers, the results imply that the agricultural production process is significantly influenced by climate conditions. Simulation results using a 2 ×CO₂ climate scenario show positive impactsfor all regions in Germany. Interestingly, the spatialdistribution of the gains is indicating no advantagefor those regions, which currently suffer frominsufficient temperature. Finally, the importance ofan endogenous output structure is confirmed by thefinding that the desired product mix will drasticallychange.     

A Cost-effective Approach to Attracting Low-income Countries to International Emissions Trading: Theory and Experiments

The cost-effectiveness of the KyotoProtocol and any similar non-global treatywould be enhanced by attracting additionalcountries to international emissions tradingand achieving this as soon as possible. Incontrast to what is heard in most of thedebate, such an enlargement is here taken to beattained with the new participants, atleast to begin with, being fullycompensated. This paper focuses on twoforms of compensation that can be used toattract poor countries to participate inemissions trading. The theoretical aswell as experimental evidence suggests that, ifpoor countries are more risk averse than richcountries, partial compensation in terms offinancial transfers is more cost-effective thanrelying solely on compensation in kind –emission quotas – as has been the case so far.Using money for partial compensation would alsoreduce the risk for ``hot air' allocations andthe ensuing political obstacles tocost-effectiveness that such allocations tendto create.     

Inequality and Income Distribution in Global Value Chains

Global value chains (GVCs), led by transnational corporations (TNCs), have reshaped the world division of labor over the past two decades. GVCs are pervasive in low technology manufacturing, such as textile and apparel, as well as in more advanced industries like automobiles, electronics, and machines. This hierarchical division of labor generates wild competition at the lower value-added stages of production, where low wages and low profit margins prevail for workers and contract manufacturers in developing countries. At the top of the hierarchy another kind of competition prevails, centered on the ability to monitor and control intellectual property rights related to innovation, finance, and marketing. We argue that GVCs have had crucial effects on income inequality and the appropriation of rents in modern capitalism.     

Creative Destruction and the Rise of Inequality

Common wisdom interprets the rise in inequality of the last two decades as the result of a skill-biased labor demand shift. This explanation does not account for two important observations: (i) within-group inequality has also markedly risen, and (ii) the rise of inequality has been accompanied by a rise of the volatility of earnings. This paper argues that a dual labor market structure, where some workers are paid efficiency-wages can account for the empirical regularities, in the absence of skilled biased technological change. The analysis demonstrates that an unbiased innovation, as well as North–South trade, can contribute to the efficiency wage premium, and thus to wage inequality, by increasing labor turnover.     

低碳农业发展核心目标:减缓和适应气候变化

减缓和适应是人类应对气候变化行动中两种相辅相成的措施。中国农业在应对气候变化中,减缓和适应同等重要:一方面,农业在减缓气候变化中具有独特的作用;另一方面,农业适应气候变化比减缓气候变化更为现实的迫切。积极发展低碳现代农业实现减排增汇,中国农业生态系统可以作为一种非常重要的固碳增汇措施,纳入全球CO2减排措施中去。中国低碳农业在减缓和适应气候变化中具有巨大潜力。     

中国东西部地区碳排放的比较研究

能源是人类社会赖以生存和发展的重要物质基础,是促进经济增长最基本的要素之一。随着世界经济的迅速发展,气候变化对人类活动的影响越来越深,也越来越受到国际社会的重视,实现节能减排已经成为全人类共同的目标。中国正处于工业化和城市化快速发展的过程,经济增长与资源供给和环境保护的矛盾日益尖锐。中国东西部地区经济发展存在较大差距,能源利用状况也不尽相同,本文比较研究东西部地区的碳排放,采用截面样本具有垂直维度信息和时间序列样本具有水平横截面信息的面板数据模型,并引入空间效应和计量方法,理论上对低碳能源发展进行补充和完善,实践上为政府制定经济与环境相互发展的能源战略提供指导,为中国全面实现节能减排提供参考。     

收入不平等对经济增长影响的实证研究

采用联立方程分析方法,实证分析了收入不平等对经济增长影响的三种机制,探讨了收入不平等如何通过影响物质资本投资、人力资本投资和居民消费来作用于经济增长。结果表明,从长期看收入不平等的扩大会刺激物质资本投资,但不利于人力资本投资和居民消费增长,收入不平等对经济增长的长期影响为负。因此,从经济发展的角度政府不应容忍收入不平等的过分扩大。     

Climate Policy with Multiple Sources and Sinks of Greenhouse Gases

This paper studies how inclusion of many sources, sinks and reservoirs -- a comprehensive approach -- affects climate policy, compared with a control merely of CO₂. Two questions of particular importance arise in such an analysis. One is how to aggregate the emissions of different climate gases, and the other is how to include all relevant measures in the analysis. To aggregate gases properly, an intertemporal analysis should be carried out. To assure that all relevant measures are included, we suggest that certain measures to reduce emissions of greenhouse gases are specified explicitly and evaluated together with indirect measures, such as carbon charges. A numerical analysis based on an optimal control model indicates that direct measures may play an important role in the design of climate policy, especially for the control of the emissions of greenhouse gases other than CO₂. Similar to other studies of the time-path for abatement efforts, the bulk of abatement should be taken by the end of the planning period. This result is significantly strengthened if gases with short life-times in the atmosphere, such as methane, are subject to control.     

新疆经济发展中碳排放总量的影响因素分析

新疆目前正处于工业化初期阶段,耗能型产业结构特征明显,经济增长中高投入、高消耗、高污染、低水平、低效益问题突出,能源利用率不高,浪费严重,使得经济发展中碳排放量居高难下。虽然新疆生态环境脆弱,但却具有发展新能源的得天独厚的条件,分析新疆经济发展中的碳排放问题对于新疆经济的可持续发展具有十分重要的战略意义。     

西部地区碳排放与经济增长关系的脱钩及驱动因素

选取在国家区域发展战略中具有优先地位的西部地区作为研究对象,首先应用脱钩理论对西部地区1995—2010年碳排放与经济增长特征进行分析,进而构建碳排放模型深入研究其驱动因素。结果显示:所研究年份间除1998—1999年为强脱钩,2003—2006年为扩张性负脱钩之外,其余时期均呈现为弱脱钩状态;经济规模的高速增长是导致碳排放增加的主要因素,经济结构的调整变化对碳排放的减少有很大潜力,能源利用效率的提高是抑制碳排放减少的关键因素,能源结构的优化是控制碳排放增加的潜在因素;弱脱钩状态下,产业结构、能源强度和能源结构影响碳排放的幅度较小,在强脱钩状态下则更小,而在扩张性负脱钩时三者所占比例同步提高。     

工业园区碳排放核算方法及实证研究

在借鉴现有碳排放统计核算方法的基础上,使用工业园区基本统计数据和本地化的排放系数,建立针对工业园区的碳排放的简便易行的统计核算方法,该方法以园区行政边界为系统边界,主要对能源直接燃烧,外部输入电力、热力,固体废弃物处理处置和重点行业生产过程的碳排放进行核算.以山东省某工业园区为例进行碳排放核算,并根据核算结果提出了园区低碳发展建议.     

中国产业结构变动的碳排放效应分析——基于省际数据的实证研究

在碳排放模型框架内,利用测算的全国省际二氧化碳排放数据,通过设定多种模型形式考察了各种因素特别是产业结构变动对二氧化碳排放产生的影响。分析结果表明,产业结构的工业化进程直接加剧了二氧化碳的排放,产业结构变化是中国碳排放增长的重要驱动因素之一,其影响程度较大;同时,FDI环境效应的合力是负面的,贸易并非国际碳污染转移的主要渠道。