气候变化领域集成服务门户(CCPortal): Space-based quantification of per capita CO2 emissions from cities

CCPortal

DOI	10.1088/1748-9326/ab68eb
	Space-based quantification of per capita CO2 emissions from cities
	Wu D.; Lin J.C.; Oda T.; Kort E.A.
发表日期	2020
ISSN	17489318
卷号	15 期号:3
英文摘要	Urban areas are currently responsible for ∼70% of the global energy-related carbon dioxide (CO2) emissions, and rapid ongoing global urbanization is increasing the number and size of cities. Thus, understanding city-scale CO2 emissions and how they vary between cities with different urban densities is a critical task. While the relationship between CO2 emissions and population density has been explored widely in prior studies, their conclusions were sensitive to inconsistent definitions of urban boundaries and the reliance upon CO2 emission inventories that implicitly assumed population relationships. Here we provide the first independent estimates of direct per capita CO2 emissions (E pc) from spaceborne atmospheric CO2 measurements from the Orbiting Carbon Observatory-2 (OCO-2) for a total 20 cities across multiple continents. The analysis accounts for the influence of meteorology on the satellite observations with an atmospheric model. The resultant upwind source region sampled by the satellite serves as an objective urban extent for aggregating emissions and population densities. Thus, we are able to detect emission 'hotspots' on a per capita basis from a few cities, subject to sampling restrictions from OCO-2. Our results suggest that E pc declines as population densities increase, albeit the decrease in E pc is partially limited by the positive correlation between E pc and per capita gross domestic product. As additional CO2-observing satellites are launched in the coming years, our space-based approach to understanding CO2 emissions from cities has significant potential in tracking and evaluating the future trajectory of urban growth and informing the effects of carbon reduction plans. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	per capitaCO2 emissions; population density; space-based estimates; urban scaling
语种	英语
scopus关键词	Carbon dioxide; Economic and social effects; Orbits; Population distribution; Population dynamics; Population statistics; Satellites; Carbon dioxide emissions; Gross domestic products; Influence of meteorologies; Population densities; Positive correlations; Satellite observations; Space-based; urban scaling; Urban growth; atmospheric modeling; carbon emission; emission inventory; energy efficiency; estimation method; OCO; satellite altimetry; scale effect; urban area; urban growth
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154216
作者单位	Department of Atmospheric Sciences, University of Utah, Salt Lake City, United States; Goddard Earth Sciences Technology and Research, Universities Space Research Association, Columbia, MD, United States; Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, United States
推荐引用方式 GB/T 7714	Wu D.,Lin J.C.,Oda T.,et al. Space-based quantification of per capita CO2 emissions from cities[J],2020,15(3).
APA	Wu D.,Lin J.C.,Oda T.,&Kort E.A..(2020).Space-based quantification of per capita CO2 emissions from cities.Environmental Research Letters,15(3).
MLA	Wu D.,et al."Space-based quantification of per capita CO2 emissions from cities".Environmental Research Letters 15.3(2020).