Mitigation of methane emissions in cities: How new measurements and partnerships can contribute to emissions reduction strategies

Hopkins, Francesca M.; Ehleringer, James R.; Bush, Susan E.; Duren, Riley M.; Miller, Charles E.; Lai, Chun-Ta; Hsu, Ying-Kuang; Carranza, Valerie; Randerson, James T.

doi:10.1002/2016EF000381

Title: Mitigation of methane emissions in cities: How new measurements and partnerships can contribute to emissions reduction strategies

Journal Article · Sat Sep 10 00:00:00 EDT 2016 · Earth's Future

DOI:https://doi.org/10.1002/2016EF000381· OSTI ID:1436409

Hopkins, Francesca M. ^[1]; Ehleringer, James R. ^[2]; Bush, Susan E. ^[3]; Duren, Riley M. ^[4]; Miller, Charles E. ^[4]; Lai, Chun-Ta ^[5]; Hsu, Ying-Kuang ^[6]; Carranza, Valerie ^[7]; Randerson, James T. ^[8]

Univ. of California, Irvine, CA (United States). Dept. of Earth System Science; California Inst. of Technology (CalTech), La Canada Flintridge, CA (United States). Jet Propulsion Lab.
Univ. of Utah, Salt Lake City, UT (United States). Dept. of Biology; Univ. of Utah, Salt Lake City, UT (United States). Global Change and Sustainability Center
Univ. of Utah, Salt Lake City, UT (United States). Dept. of Biology
California Inst. of Technology (CalTech), La Canada Flintridge, CA (United States). Jet Propulsion Lab.
San Diego State Univ., San Diego, CA (United States). Dept. of Biology
California Air Resources Board, Sacramento, CA (United States). Monitoring and Laboratory Division
Univ. of California, Los Angeles, CA (United States). Environmental Science
Univ. of California, Irvine, CA (United States). Dept. of Earth System Science

Cities generate 70% of anthropogenic greenhouse gas emissions, a fraction that is grow-ing with global urbanization. While cities play an important role in climate change mitigation, there has been little focus on reducing urban methane (CH4) emissions. Here, we develop a conceptual framework for CH₄ mitigation in cities by describing emission processes, the role of measurements, and a need for new institutional partnerships. Urban CH₄ emissions are likely to grow with expanding use of natural gas and organic waste disposal systems in growing population centers; however, we currently lack the ability to quantify this increase. We also lack systematic knowledge of the relative contribution of these distinct source sectors on emissions. We present new observations from four North American cities to demonstrate that CH4 emissions vary in magnitude and sector from city to city and hence require different mitigation strategies. Detections of fugitive emissions from these systems suggest that current mitiga- tion approaches are absent or ineffective. These findings illustrate that tackling urban CH₄ emissions will require research efforts to identify mitigation targets, develop and implement new mitigation strategies, and monitor atmospheric CH₄ levels to ensure the success of mitigation efforts. This research will require a variety of techniques to achieve these objectives and should be deployed in cities globally. In conclusion, we suggest that metropolitan scale partnerships may effectively coordinate systematic measurements and actions focused on emission reduction goals.

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Research Organization:: Univ. of Utah, Salt Lake City, UT (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Biological and Environmental Research (BER); National Aeronautics and Space Administration (NASA)

Grant/Contract Number:: SC0005266

OSTI ID:: 1436409

Journal Information:: Earth's Future, Vol. 4, Issue 9; ISSN 2328-4277

Publisher:: American Geophysical Union (AGU)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 40 works

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Title: Mitigation of methane emissions in cities: How new measurements and partnerships can contribute to emissions reduction strategies

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