...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Transportation Research >Environmental efficiency for a cross-section of Spanish port authorities
【24h】

Environmental efficiency for a cross-section of Spanish port authorities

机译：西班牙港口当局各部门的环境效率

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Shipping has well-documented environmental impacts, among which are greenhouse gas emissions that contribute to climate change and global warming. Measurement of the possibility of ports to reduce emissions by operating more efficiently provides important information for policymakers. In this study we estimate environmental efficiency for a cross section of 28 Spanish Port Authorities observed in 2016 using an output-oriented directional distance frontier with a 'bad output', carbon dioxide (CO2) emissions. We use the non-parametric mathematical programming technique of Data Envelopment Analysis (DEA) to estimate the frontier. Our novel dataset includes information on CO2 emissions obtained for these Spanish Port Authorities using the fleet activity-based emission estimation (bottom-up) methodology. Using ships berthing as output, if all port authorities had been environmentally efficient in providing their services, CO2 emission could have been reduced to an average of 63% of their actual observed levels with a simultaneous increase in good output. When using cargo and passenger traffic as output in order to control for ship characteristics through the output mix, we find that reductions of emissions to 82% of observed levels could be achieved with simultaneous increases in outputs, and reductions to 72 of existing levels if good outputs remain constant.
机译：航运业有据可查的环境影响，其中包括导致气候变化和全球变暖的温室气体排放。衡量港口通过更有效地运营来减少排放的可能性为决策者提供了重要的信息。在这项研究中，我们使用2016年观察到的28个西班牙港务局的横截面，使用了以输出为导向的定向距离边界和``不良输出''，二氧化碳（CO2）排放量来估算环境效率。我们使用数据包络分析（DEA）的非参数数学编程技术来估计边界。我们新颖的数据集包含使用基于船队活动的排放估算（自下而上）方法为这些西班牙港口当局获得的CO2排放信息。使用所有船舶靠泊作为输出，如果所有港口当局在提供服务方面都具有环境效率，那么二氧化碳排放量可以平均减少到实际观测水平的63％，同时增加良好的输出。当使用货运和客运量作为输出以通过输出组合控制船舶特性时，我们发现，同时增加输出可以将排放量减少到观测水平的82％，如果良好，则可以减少到现有水平的72％输出保持恒定。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号