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Li H, Zheng B, Ciais P, Boersma KF, Riess TCVW, Martin RV, Broquet G, van der A R, Li H, Hong C, Lei Y, Kong Y, Zhang Q, He K. Satellite reveals a steep decline in China's CO 2 emissions in early 2022. SCIENCE ADVANCES 2023; 9:eadg7429. [PMID: 37478188 PMCID: PMC10361590 DOI: 10.1126/sciadv.adg7429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 06/16/2023] [Indexed: 07/23/2023]
Abstract
Response actions to the coronavirus disease 2019 perturbed economies and carbon dioxide (CO2) emissions. The Omicron variant that emerged in 2022 caused more substantial infections than in 2020 and 2021 but it has not yet been ascertained whether Omicron interrupted the temporary post-2021 rebound of CO2 emissions. Here, using satellite nitrogen dioxide observations combined with atmospheric inversion, we show a larger decline in China's CO2 emissions between January and April 2022 than in those months during the first wave of 2020. China's CO2 emissions are estimated to have decreased by 15% (equivalent to -244.3 million metric tons of CO2) during the 2022 lockdown, greater than the 9% reduction during the 2020 lockdown. Omicron affected most of the populated and industrial provinces in 2022, hindering China's CO2 emissions rebound starting from 2021. China's emission variations agreed with downstream CO2 concentration changes, indicating a potential to monitor CO2 emissions by integrating satellite and ground measurements.
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Affiliation(s)
- Hui Li
- Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration, Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China
| | - Bo Zheng
- Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration, Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China
| | - Philippe Ciais
- Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration, Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Laboratoire des Sciences du Climat et de l’Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France
| | - K. Folkert Boersma
- Department of Meteorology and Air Quality, Wageningen University, Wageningen, Netherlands
- Climate Observations Department, Royal Netherlands Meteorological Institute, De Bilt, Netherlands
| | | | - Randall V. Martin
- Department of Energy, Environmental and Chemical Engineering, Washington University, St. Louis, MO, USA
- Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS, Canada
| | - Gregoire Broquet
- Laboratoire des Sciences du Climat et de l’Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Ronald van der A
- R&D Satellite Observations, Royal Netherlands Meteorological Institute (KNMI), De Bilt, Netherlands
| | - Haiyan Li
- School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China
| | - Chaopeng Hong
- Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration, Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China
| | - Yu Lei
- Chinese Academy of Environmental Planning, Beijing 100012, China
| | - Yawen Kong
- Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing 100084, China
| | - Qiang Zhang
- Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing 100084, China
| | - Kebin He
- State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
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Liang M, Zhang Y, Ma Q, Yu D, Chen X, Cohen JB. Dramatic decline of observed atmospheric CO 2 and CH 4 during the COVID-19 lockdown over the Yangtze River Delta of China. J Environ Sci (China) 2023; 124:712-722. [PMID: 36182176 PMCID: PMC9515762 DOI: 10.1016/j.jes.2021.09.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 09/01/2021] [Accepted: 09/26/2021] [Indexed: 06/16/2023]
Abstract
The temporal variation of greenhouse gas concentrations in China during the COVID-19 lockdown in China is analyzed in this work using high resolution measurements of near surface △CO2, △CH4 and △CO concentrations above the background conditions at Lin'an station (LAN), a regional background station in the Yangtze River Delta region. During the pre-lockdown observational period (IOP-1), both △CO2 and △CH4 exhibited a significant increasing trend relative to the 2011-2019 climatological mean. The reduction of △CO2, △CH4 and △CO during the lockdown observational period (IOP-2) (which also coincided with the Chinese New Year Holiday) reached up to 15.0 ppm, 14.2 ppb and 146.8 ppb, respectively, and a reduction of △CO2/△CO probably due to a dramatic reduction from industrial emissions. △CO2, △CH4 and △CO were observed to keep declining during the post-lockdown easing phase (IOP-3), which is the synthetic result of lower than normal CO2 emissions from rural regions around LAN coupled with strong uptake of the terrestrial ecosystem. Interestingly, the trend reversed to gradual increase for all species during the later easing phase (IOP-4), with △CO2/△CO constantly increasing from IOP-2 to IOP-3 and finally IOP-4, consistent with recovery in industrial emissions associated with the staged resumption of economic activity. On average, △CO2 declined sharply throughout the days during IOP-2 but increased gradually throughout the days during IOP-4. The findings showcase the significant role of emission reduction in accounting for the dramatic changes in measured atmospheric △CO2 and △CH4 associated with the COVID-19 lockdown and recovery.
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Affiliation(s)
- Miao Liang
- Meteorological Observation Center, China Meteorological Administration, Beijing 100081, China
| | - Yong Zhang
- Meteorological Observation Center, China Meteorological Administration, Beijing 100081, China.
| | - Qianli Ma
- Lin'an Atmospheric Regional Background Station, China Meteorological Administration (CMA), Hangzhou 311307, China
| | - Dajiang Yu
- Longfengshan Regional Background Station, China Meteorological Administration (CMA), Heilongjiang 150200, China
| | - Xiaojian Chen
- Shanxi Meteorological Information Center, China Meteorological Administration (CMA), Shanxi 030000, China
| | - Jason Blake Cohen
- School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, 221116, China
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3
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Agustí-Panareda A, McNorton J, Balsamo G, Baier BC, Bousserez N, Boussetta S, Brunner D, Chevallier F, Choulga M, Diamantakis M, Engelen R, Flemming J, Granier C, Guevara M, Denier van der Gon H, Elguindi N, Haussaire JM, Jung M, Janssens-Maenhout G, Kivi R, Massart S, Papale D, Parrington M, Razinger M, Sweeney C, Vermeulen A, Walther S. Global nature run data with realistic high-resolution carbon weather for the year of the Paris Agreement. Sci Data 2022; 9:160. [PMID: 35410420 PMCID: PMC9001646 DOI: 10.1038/s41597-022-01228-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 02/21/2022] [Indexed: 11/13/2022] Open
Abstract
The CO2 Human Emissions project has generated realistic high-resolution 9 km global simulations for atmospheric carbon tracers referred to as nature runs to foster carbon-cycle research applications with current and planned satellite missions, as well as the surge of in situ observations. Realistic atmospheric CO2, CH4 and CO fields can provide a reference for assessing the impact of proposed designs of new satellites and in situ networks and to study atmospheric variability of the tracers modulated by the weather. The simulations spanning 2015 are based on the Copernicus Atmosphere Monitoring Service forecasts at the European Centre for Medium Range Weather Forecasts, with improvements in various model components and input data such as anthropogenic emissions, in preparation of a CO2 Monitoring and Verification Support system. The relative contribution of different emissions and natural fluxes towards observed atmospheric variability is diagnosed by additional tagged tracers in the simulations. The evaluation of such high-resolution model simulations can be used to identify model deficiencies and guide further model improvements. Measurement(s) | atmospheric carbon dioxide, methane and carbon monoxide | Technology Type(s) | numerical simulation | Factor Type(s) | None | Sample Characteristic - Organism | long-lived greenhouse gases | Sample Characteristic - Environment | atmosphere | Sample Characteristic - Location | global atmosphere |
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Ray RL, Singh VP, Singh SK, Acharya BS, He Y. What is the impact of COVID-19 pandemic on global carbon emissions? THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 816:151503. [PMID: 34752864 PMCID: PMC8572037 DOI: 10.1016/j.scitotenv.2021.151503] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 09/03/2021] [Accepted: 11/03/2021] [Indexed: 05/10/2023]
Abstract
The coronavirus 2019 (COVID 19, or SARS-CoV-2) pandemic that started in December 2019 has caused an unprecedented impact in most countries globally and continues to threaten human lives worldwide. The COVID-19 and strict lockdown measures have had adverse effects on human health and national economies. These lockdown measures have played a critical role in improving air quality, water quality, and the ozone layer and reducing greenhouse gas emissions. Using Soil Moisture Active Passive (SMAP) Level 4 carbon (SMAP LC4) satellite products, this study investigated the impacts of COVID-19 lockdown measures on annual carbon emissions globally, focusing on 47 greatly affected countries and their 105 cities by December 2020. It is shown that while the lockdown measures significantly reduced carbon emissions globally, several countries and cities observed this reduction as temporary because strict lockdown measures were not imposed for extended periods in 2020. Overall, the total carbon emissions of select 184 countries reduced by 438 Mt in 2020 than in 2019. Since the global economic activities are slowly expected to return to the non-COVID-19 state, the reduction in carbon emissions during the pandemic will not be sustainable in the long run. For sustainability, concerned authorities have to put significant efforts to change transportation, climate, and environmental policies globally that fuel carbon emissions. Overall, the presented results provide directions to the stakeholders and policymakers to develop and implement measures to control carbon emissions for a sustainable environment.
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Affiliation(s)
- Ram L Ray
- College of Agriculture and Human Sciences, Prairie View A&M University, Prairie View, TX 77446, USA.
| | - Vijay P Singh
- Department of Biological and Agricultural Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Sudhir K Singh
- K. Banerjee Centre of Atmospheric & Ocean Studies, IIDS, Nehru Science Centre, University of Allahabad, Prayagraj 211002, India
| | - Bharat S Acharya
- Oklahoma Department of Mines, State of Oklahoma, Oklahoma City, OK 73106, USA
| | - Yiping He
- EDF Renewable Energy, San Diego, CA 92128, USA
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5
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Chevallier F, Broquet G, Zheng B, Ciais P, Eldering A. Large CO 2 Emitters as Seen From Satellite: Comparison to a Gridded Global Emission Inventory. GEOPHYSICAL RESEARCH LETTERS 2022; 49:e2021GL097540. [PMID: 35859934 PMCID: PMC9285415 DOI: 10.1029/2021gl097540] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 02/14/2022] [Accepted: 02/22/2022] [Indexed: 06/15/2023]
Abstract
Using the multiyear archive of the two Orbiting Carbon Observatories (OCO) of NASA, we have retrieved large fossil fuel CO2 emissions (larger than 1.0 ktCO2 h-1 per 10-2 square degree grid cell) over the globe with a simple plume cross-sectional inversion approach. We have compared our results with a global gridded and hourly inventory. The corresponding OCO emission retrievals explain more than one third of the inventory variance at the corresponding cells and hours. We have binned the data at diverse time scales from the year (with OCO-2) to the average morning and afternoon (with OCO-3). We see consistent variations of the median emissions, indicating that the retrieval-inventory differences (with standard deviations of a few tens of percent) are mostly random and that trends can be calculated robustly in areas of favorable observing conditions, when the future satellite CO2 imagers provide an order of magnitude more data.
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Affiliation(s)
- Frédéric Chevallier
- Laboratoire des Sciences du Climat et de l’EnvironnementLSCE/IPSLCEA‐CNRS‐UVSQUniversité Paris‐SaclayGif‐sur‐YvetteFrance
| | - Grégoire Broquet
- Laboratoire des Sciences du Climat et de l’EnvironnementLSCE/IPSLCEA‐CNRS‐UVSQUniversité Paris‐SaclayGif‐sur‐YvetteFrance
| | - Bo Zheng
- Institute of Environment and EcologyTsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhenChina
| | - Philippe Ciais
- Laboratoire des Sciences du Climat et de l’EnvironnementLSCE/IPSLCEA‐CNRS‐UVSQUniversité Paris‐SaclayGif‐sur‐YvetteFrance
| | - Annmarie Eldering
- Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaCAUSA
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6
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Dou X, Wang Y, Ciais P, Chevallier F, Davis SJ, Crippa M, Janssens-Maenhout G, Guizzardi D, Solazzo E, Yan F, Huo D, Zheng B, Zhu B, Cui D, Ke P, Sun T, Wang H, Zhang Q, Gentine P, Deng Z, Liu Z. Near-real-time global gridded daily CO 2 emissions. Innovation (N Y) 2022; 3:100182. [PMID: 34988539 PMCID: PMC8703084 DOI: 10.1016/j.xinn.2021.100182] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 10/28/2021] [Indexed: 11/26/2022] Open
Abstract
Precise and high-resolution carbon dioxide (CO2) emission data is of great importance in achieving carbon neutrality around the world. Here we present for the first time the near-real-time Global Gridded Daily CO2 Emissions Dataset (GRACED) from fossil fuel and cement production with a global spatial resolution of 0.1° by 0.1° and a temporal resolution of 1 day. Gridded fossil emissions are computed for different sectors based on the daily national CO2 emissions from near-real-time dataset (Carbon Monitor), the spatial patterns of point source emission dataset Global Energy Infrastructure Emissions Database (GID), Emission Database for Global Atmospheric Research (EDGAR), and spatiotemporal patters of satellite nitrogen dioxide (NO2) retrievals. Our study on the global CO2 emissions responds to the growing and urgent need for high-quality, fine-grained, near-real-time CO2 emissions estimates to support global emissions monitoring across various spatial scales. We show the spatial patterns of emission changes for power, industry, residential consumption, ground transportation, domestic and international aviation, and international shipping sectors from January 1, 2019, to December 31, 2020. This gives thorough insights into the relative contributions from each sector. Furthermore, it provides the most up-to-date and fine-grained overview of where and when fossil CO2 emissions have decreased and rebounded in response to emergencies (e.g., coronavirus disease 2019 [COVID-19]) and other disturbances of human activities of any previously published dataset. As the world recovers from the pandemic and decarbonizes its energy systems, regular updates of this dataset will enable policymakers to more closely monitor the effectiveness of climate and energy policies and quickly adapt.
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Affiliation(s)
- Xinyu Dou
- Department of Earth System Science, Tsinghua University, Beijing 100084, China
| | - Yilong Wang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Philippe Ciais
- Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Frédéric Chevallier
- Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Steven J Davis
- Department of Earth System Science, University of California, Irvine, CA, USA
| | - Monica Crippa
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | | | - Diego Guizzardi
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Efisio Solazzo
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Feifan Yan
- Key Laboratory of Marine Environment and Ecology, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ministry of Education, Ocean University of China, Qingdao 266100, China
| | - Da Huo
- Department of Earth System Science, Tsinghua University, Beijing 100084, China
| | - Bo Zheng
- Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Biqing Zhu
- Department of Earth System Science, Tsinghua University, Beijing 100084, China
| | - Duo Cui
- Department of Earth System Science, Tsinghua University, Beijing 100084, China
| | - Piyu Ke
- Department of Earth System Science, Tsinghua University, Beijing 100084, China
| | - Taochun Sun
- Department of Earth System Science, Tsinghua University, Beijing 100084, China
| | - Hengqi Wang
- Department of Earth System Science, Tsinghua University, Beijing 100084, China
| | - Qiang Zhang
- Department of Earth System Science, Tsinghua University, Beijing 100084, China
| | - Pierre Gentine
- Department of Earth and Environmental Engineering, Columbia University, New York, NY, USA
| | - Zhu Deng
- Department of Earth System Science, Tsinghua University, Beijing 100084, China
| | - Zhu Liu
- Department of Earth System Science, Tsinghua University, Beijing 100084, China
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7
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Lovenduski NS, Chatterjee A, Swart NC, Fyfe JC, Keeling RF, Schimel D. On the Detection of COVID-Driven Changes in Atmospheric Carbon Dioxide. GEOPHYSICAL RESEARCH LETTERS 2021; 48:e2021GL095396. [PMID: 34924639 PMCID: PMC8667626 DOI: 10.1029/2021gl095396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 10/25/2021] [Accepted: 11/07/2021] [Indexed: 06/14/2023]
Abstract
We assess the detectability of COVID-like emissions reductions in global atmospheric CO2 concentrations using a suite of large ensembles conducted with an Earth system model. We find a unique fingerprint of COVID in the simulated growth rate of CO2 sampled at the locations of surface measurement sites. Negative anomalies in growth rates persist from January 2020 through December 2021, reaching a maximum in February 2021. However, this fingerprint is not formally detectable unless we force the model with unrealistically large emissions reductions (2 or 4 times the observed reductions). Internal variability and carbon-concentration feedbacks obscure the detectability of short-term emission reductions in atmospheric CO2. COVID-driven changes in the simulated, column-averaged dry air mole fractions of CO2 are eclipsed by large internal variability. Carbon-concentration feedbacks begin to operate almost immediately after the emissions reduction; these feedbacks reduce the emissions-driven signal in the atmosphere carbon reservoir and further confound signal detection.
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Affiliation(s)
- Nicole S. Lovenduski
- Department of Atmospheric and Oceanic Sciences and Institute of Arctic and Alpine ResearchUniversity of ColoradoBoulderCOUSA
| | - Abhishek Chatterjee
- Carbon Cycle and Ecosystems GroupJet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaCAUSA
- USRA/NASA Goddard Space Flight CenterGreenbeltMDUSA
| | - Neil C. Swart
- Canadian Centre for Climate Modelling and AnalysisEnvironment and Climate Change CanadaVictoriaBCCanada
| | - John C. Fyfe
- Canadian Centre for Climate Modelling and AnalysisEnvironment and Climate Change CanadaVictoriaBCCanada
| | - Ralph F. Keeling
- Scripps Institution of OceanographyUniversity of California San DiegoLa JollaCAUSA
| | - David Schimel
- Carbon Cycle and Ecosystems GroupJet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaCAUSA
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8
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Weir B, Crisp D, O’Dell CW, Basu S, Chatterjee A, Kolassa J, Oda T, Pawson S, Poulter B, Zhang Z, Ciais P, Davis SJ, Liu Z, Ott LE. Regional impacts of COVID-19 on carbon dioxide detected worldwide from space. SCIENCE ADVANCES 2021; 7:eabf9415. [PMID: 34731009 PMCID: PMC8565902 DOI: 10.1126/sciadv.abf9415] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 09/15/2021] [Indexed: 06/06/2023]
Abstract
Activity reductions in early 2020 due to the coronavirus disease 2019 pandemic led to unprecedented decreases in carbon dioxide (CO2) emissions. Despite their record size, the resulting atmospheric signals are smaller than and obscured by climate variability in atmospheric transport and biospheric fluxes, notably that related to the 2019–2020 Indian Ocean Dipole. Monitoring CO2 anomalies and distinguishing human and climatic causes thus remain a new frontier in Earth system science. We show that the impact of short-term regional changes in fossil fuel emissions on CO2 concentrations was observable from space. Starting in February and continuing through May, column CO2 over many of the world’s largest emitting regions was 0.14 to 0.62 parts per million less than expected in a pandemic-free scenario, consistent with reductions of 3 to 13% in annual global emissions. Current spaceborne technologies are therefore approaching levels of accuracy and precision needed to support climate mitigation strategies with future missions expected to meet those needs.
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Affiliation(s)
- Brad Weir
- Universities Space Research Association, Columbia, MD, USA
- Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - David Crisp
- Jet Propulsion Laboratory, Pasadena, CA, USA
| | - Christopher W. O’Dell
- Cooperative Institute for Research in the Atmosphere, Colorado State University, Fort Collins, CO, USA
| | - Sourish Basu
- Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, USA
- Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, USA
| | - Abhishek Chatterjee
- Universities Space Research Association, Columbia, MD, USA
- Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - Jana Kolassa
- Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, USA
- Science and Systems and Applications Incorporated, Lanham, MD, USA
| | - Tomohiro Oda
- Universities Space Research Association, Columbia, MD, USA
- Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, USA
- The Earth from Space Institute (EfSI), Universities Space Research Association, 7178 Columbia Gateway Dr, Columbia, MD 21046, USA
- Department of Atmospheric and Oceanic Science, University of Maryland, 4254 Stadium Dr, College Park, MD 20742, USA
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Steven Pawson
- Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - Benjamin Poulter
- Biospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - Zhen Zhang
- Department of Atmospheric and Oceanic Science, University of Maryland, 4254 Stadium Dr, College Park, MD 20742, USA
| | - Philippe Ciais
- Laboratoire des Sciences du Climat et de l'Environnement, Gif sur Yvette, France
| | - Steven J. Davis
- Department of Earth System Science, University of California, Irvine, Irvine, CA, USA
| | - Zhu Liu
- Department of Earth System Science, Tsinghua University, Beijing, China
| | - Lesley E. Ott
- Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, USA
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9
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Jones CD, Hickman JE, Rumbold ST, Walton J, Lamboll RD, Skeie RB, Fiedler S, Forster PM, Rogelj J, Abe M, Botzet M, Calvin K, Cassou C, Cole JN, Davini P, Deushi M, Dix M, Fyfe JC, Gillett NP, Ilyina T, Kawamiya M, Kelley M, Kharin S, Koshiro T, Li H, Mackallah C, Müller WA, Nabat P, van Noije T, Nolan P, Ohgaito R, Olivié D, Oshima N, Parodi J, Reerink TJ, Ren L, Romanou A, Séférian R, Tang Y, Timmreck C, Tjiputra J, Tourigny E, Tsigaridis K, Wang H, Wu M, Wyser K, Yang S, Yang Y, Ziehn T. The Climate Response to Emissions Reductions Due to COVID-19: Initial Results From CovidMIP. GEOPHYSICAL RESEARCH LETTERS 2021; 48:e2020GL091883. [PMID: 34149115 PMCID: PMC8206678 DOI: 10.1029/2020gl091883] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/24/2021] [Accepted: 02/15/2021] [Indexed: 05/30/2023]
Abstract
Many nations responded to the corona virus disease-2019 (COVID-19) pandemic by restricting travel and other activities during 2020, resulting in temporarily reduced emissions of CO2, other greenhouse gases and ozone and aerosol precursors. We present the initial results from a coordinated Intercomparison, CovidMIP, of Earth system model simulations which assess the impact on climate of these emissions reductions. 12 models performed multiple initial-condition ensembles to produce over 300 simulations spanning both initial condition and model structural uncertainty. We find model consensus on reduced aerosol amounts (particularly over southern and eastern Asia) and associated increases in surface shortwave radiation levels. However, any impact on near-surface temperature or rainfall during 2020-2024 is extremely small and is not detectable in this initial analysis. Regional analyses on a finer scale, and closer attention to extremes (especially linked to changes in atmospheric composition and air quality) are required to test the impact of COVID-19-related emission reductions on near-term climate.
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