气候变化领域集成服务门户(CCPortal): Urban-focused satellite CO2 observations from the Orbiting Carbon Observatory-3: A first look at the Los Angeles megacity

CCPortal

DOI	10.1016/j.rse.2021.112314
	Urban-focused satellite CO2 observations from the Orbiting Carbon Observatory-3: A first look at the Los Angeles megacity
	Kiel M.; Eldering A.; Roten D.D.; Lin J.C.; Feng S.; Lei R.; Lauvaux T.; Oda T.; Roehl C.M.; Blavier J.-F.; Iraci L.T.
发表日期	2021
ISSN	00344257
卷号	258
英文摘要	NASA's Orbiting Carbon Observatory-3 (OCO-3) was designed to support the quantification and monitoring of anthropogenic CO2 emissions. Its Snapshot Area Map (SAM) and target mode measurements provide an innovative dataset for carbon studies on sub-city scales. Unlike any other current space-based instrument, OCO-3 has the ability to scan large contiguous areas of emission hot spots like cities, power plants, and volcanoes. These measurements result in dense, fine-scale spatial maps of column averaged dry-air mole fractions of carbon dioxide (XCO2). For the first time, we present and analyze XCO2 distributions over the Los Angeles megacity (LA) derived from OCO-3 SAM and target mode observations. Urban XCO2 enhancements range from 0 − 6 ppm (median enhancements ≃ 2 ppm) relative to a clean background and show excellent agreement with nearby ground-based TCCON measurements of XCO2. OCO-3's dense observations reveal intra-urban variations of XCO2 over the city that have never been observed from space before. The spatial variations are mainly driven by the complex fossil fuel emission patterns and meteorological conditions in the LA Basin and are in good agreement with those from co-located TROPOMI measurements of co-emitted NO2. Differences between measured and simulated XCO2 enhancements from two models (WRF-Chem and X-STILT) are typically below 1 ppm with larger differences for some sub regions. Both models capture the observed intra-urban XCO2 gradients. Further, OCO-3's multi-swath measurements capture about three times as much of the city emissions compared to single-swath overpasses. OCO-3's frequent target and SAM mode observations will pave the way to constrain urban emissions at finer, sub-city scales. © 2021 The Author(s)
英文关键词	Anthropogenic; Carbon dioxide; Fossil fuel; Greenhouse gas emissions; Los Angeles; Megacity; OCO-3; Remote sensing; TCCON; WRF-Chem; X-STILT
语种	英语
scopus关键词	Carbon dioxide; Fossil fuel power plants; Fossil fuels; NASA; Observatories; CO2 emissions; Contiguous area; Fossil fuel emissions; Measurements of; Meteorological condition; Mole fraction; Spatial variations; Urban emissions; Orbits; anthropogenic source; carbon dioxide; carbon emission; data set; innovation; megacity; observatory; power plant; simulation; urban area; California; Los Angeles [California]; United States
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178899
作者单位	Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Department of Meteorology and Atmospheric Science, The Pennsylvania State University, University Park, PA, United States; Laboratoire des Sciences du Climat et de l'Environnement, CEA, CNRS, UVSQ/IPSL, Université Paris-Saclay, Orme des Merisiers, Gif-sur-Yvette, France; Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT, United States; Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Goddard Earth Sciences Technology and Research, Universities Space Research Association, Columbia, MD, United States; Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD, United States; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States; NASA Ames Research Center, Moffett Field, CA, United States; Atmospheric Sciences and Global Change Division, Pacific Northwest...
推荐引用方式 GB/T 7714	Kiel M.,Eldering A.,Roten D.D.,et al. Urban-focused satellite CO2 observations from the Orbiting Carbon Observatory-3: A first look at the Los Angeles megacity[J],2021,258.
APA	Kiel M..,Eldering A..,Roten D.D..,Lin J.C..,Feng S..,...&Iraci L.T..(2021).Urban-focused satellite CO2 observations from the Orbiting Carbon Observatory-3: A first look at the Los Angeles megacity.Remote Sensing of Environment,258.
MLA	Kiel M.,et al."Urban-focused satellite CO2 observations from the Orbiting Carbon Observatory-3: A first look at the Los Angeles megacity".Remote Sensing of Environment 258(2021).