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Greenhouse Gas Emissions from Global Cities
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2009 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 43, no 19, 7297-7302 p.Article in journal (Refereed) Published
Abstract [en]

The world's population is now over 50% urban, and cities make an important contribution to national greenhouse gas (GHG) emissions. Many cities are developing strategies to reduce their emissions. Here we ask how and why emissions differ between cities. Our study often global cities shows how a balance of geophysical factors (climate, access to resources, and gateway status) and technical factors (power generation, urban design, and waste processing) determine the GHGs attributable to cities. Within the overall trends, however, there are differences between cities with more or less public transit while personal income also impacts heating and industrial fuel use. By including upstream emissions from fuels, GHG emissions attributable to cities exceed those from direct end use by up to 25%. Our findings should help foster intercity learning on reducing GHG emissions.

Place, publisher, year, edition, pages
2009. Vol. 43, no 19, 7297-7302 p.
National Category
Other Environmental Engineering
Identifiers
URN: urn:nbn:se:kth:diva-176831DOI: 10.1021/es900213pISI: 000270136500025PubMedID: 19848137Scopus ID: 2-s2.0-70349617486OAI: oai:DiVA.org:kth-176831DiVA: diva2:868256
Note

QC 20151110

Available from: 2015-11-10 Created: 2015-11-10 Last updated: 2017-12-01Bibliographically approved
In thesis
1. Modeling urban energy flows at macro and district levels: towards a sustainable urban metabolism
Open this publication in new window or tab >>Modeling urban energy flows at macro and district levels: towards a sustainable urban metabolism
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The urban sustainability is a growing importance in the built environment research. Urban areas play a key role in planning for sustainable city development. Urbanization has implications for future energy systems and energy-related emissions. The new built environment requires systems that are cost-efficient and have more efficient utilization of energy with a low environmental impact. This can be analyzed and designed with efficient tools for current and future energy systems. The objectives of this dissertation are to examine and analyze the metabolic flows of urban areas, and to develop a methodology for optimization of energy systems and services for the urban district. The dissertation is comprised of two phases and eight appended publications.

In the first phase of this dissertation, the research is emphasized on an in-depth understanding of the complex dynamics of energy utilization in large urban areas. An integrated approach applied in this phase includes the energetic urban metabolism, the long-term energy systems modeling using the Long-range Energy Alternative Planning (LEAP) system, and the Multi-Criteria Decision-Making (MCDM) approach. The urban metabolism approach has been employed to analyze the urban energy flows at macro level. The LEAP model and MCDM approach have been used to develop and evaluate energy scenarios in both demand and supply sides.

In the second phase, the research recognizes the lack of tools that applicable for district energy systems analysis. This phase concentrates on the important role of the district level in urban energy systems. Research methods include the Multi-Objective Optimization using Genetic Algorithms, the carbon budget approach, and the case study method. Research in the second phase is mainly focused on the development of tool for energy systems and services at the district level.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2015. 86 p.
Series
TRITA-IES, 2015:07
National Category
Building Technologies
Identifiers
urn:nbn:se:kth:diva-176828 (URN)978-91-7595-794-4 (ISBN)
Public defence
2015-11-30, Sal F3, Lindstedtsvägen 26, KTH, Stockholm, 10:00 (English)
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Note

QC 20151110

Available from: 2015-11-10 Created: 2015-11-10 Last updated: 2015-11-16Bibliographically approved

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Steinberger, JuliaVillalba Mendez, Gara

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