Global Carbon Budget
Published on 4 November 2021
2021
PowerPoint version 1.0
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Acknowledgements
The work presented here has been possible thanks to the enormous observational and modelling efforts of the institutions and networks below
Atmospheric CO2 datasets
NOAA/ESRL (Dlugokencky and Tans 2021)
Scripps (Keeling et al. 1976)
Fossil CO2 emissions
Andrew and Peters, 2021
CDIAC (Gilfillan and Marland, 2021)
UNFCCC, 2021a
BP, 2021
Consumption Emissions
Peters et al. 2011
GTAP (Narayanan et al. 2015)
Land-Use Change
Houghton and Nassikas 2017
BLUE (Hansis et al. 2015)
OSCAR (Gasser et al. 2020)
GFED4 (van der Werf et al. 2017)
FAO-FRA and FAOSTAT
HYDE (Klein Goldewijk et al. 2017)
LUH2 (Hurtt et al. 2020)
Atmospheric inversions
CarbonTracker Europe | Jena CarboScope | CAMS | UoE In situ | NISMON-CO2 | CMS-Flux
Land models
CABLE-POP | CLASSIC | CLM5.0 | DLEM | IBIS | ISAM | ISBA-CTRIP | JSBACH | JULES-ES | LPJ-GUESS | LPJ | LPX-Bern | OCN | ORCHIDEEv3 | SDGVM | VISIT | YIBs
Climate forcing CRU (Harris et al. 2014) | JRA-55 (Kobayashi et al. 2015)
Ocean models
CESM-ETHZ | FESOM-2.1-REcoM2 | MICOM-HAMOCC (NorESM-OCv1.2) | MOM6-COBALT (Princeton) | MPIOM-HAMOCC6 | NEMO3.6-PISCESv2-gas (CNRM) | NEMO-PISCES (IPSL) | NEMO-PlankTOM12
fCO2 based ocean flux products
CMEMS-LSCE-FFNNv2 |CSIR-ML6 | Jena- MLS | JMA-MLR | NIES-NN | MPI-SOMFFN | OS-ETHZ-GRaCER | Watson et al.
Surface Ocean CO2 Atlas SOCATv2021
Full references provided in Friedlingstein et al 2021
Contributors 94 people | 70 organisations | 18 countries
P Friedlingstein UK | MW Jones UK | M O’Sullivan UK | RM Andrew Norway | DCE Bakker UK�J Hauck Germany | Le Quéré UK | GP Peters Norway | W Peters Netherlands | J Pongratz Germany�S Sitch UK | JG Canadell Australia | P Ciais France | RB Jackson USA
Simone R. Alin USA | Peter Anthoni USA | Nicholas R. Bates Bermuda | Meike Becker Norway | Nicolas Bellouin UK | Laurent Bopp France | Thi Tuyet Trang Chau France | Frédéric Chevallier France | Louise P. Chini USA | Margot Cronin Ireland | Kim I. Currie New Zealand | Bertrand Decharme France | Laique M. Djeutchouang South Africa | Xinyu Dou China | Wiley Evans Canada | Richard A. Feely USA | Liang Feng UK | Thomas Gasser Austria | Dennis Gilfillan USA | Thanos Gkritzalis Belgium | Giacomo Grassi Italy | Luke Gregor Switzerland | Nicolas Gruber Switzerland | Özgür Gürses Germany | Ian Harris UK| Richard A. Houghton USA | George Hurtt USA | Yosuke Iida Japan | Tatiana Ilyina Germany | Ingrid T. Luijkx Netherlands | Atul K. Jain USA | Steve D. Jones UK | Etsushi Kato Japan | Daniel Kennedy
USA | Kees Klein Goldewijk Netherlands | Jürgen Knauer Australia | Jan Ivar Korsbakken Norway | Arne Körtzinger Germany | Peter Landschützer Germany | Siv K. Lauvset Norway | Nathalie Lefèvre France | Sebastian Lienert Switzerland | Zhu Liu China | Danica Lombardozzi USA | Gregg Marland USA | Nicolas Metzl France | David R. Munro USA | Junjie Liu USA | Gregg Marland USA | Patrick C. McGuire UK | Joe R. Melton Canada | David R. Munro USA | Julia E. M. S. Nabel Germany | Shin-ichiro Nakaoka Japan | Yosuke Niwa Japan | Tsuneo Ono Japan | Denis Pierrot USA | Benjamin Poulter USA | Gregor Rehder Germany | Laure Resplandy USA | Eddy Robertson UK | Christian Rödenbeck Germany | Thais M Rosan UK | Jörg Schwinger Norway | Clemens Schwingshackl Germany | Roland Séférian France | Adrienne J. Sutton USA | Colm Sweeney USA | Toste Tanhua Germany | Pieter P. Tans USA | Hanqin Tian USA | Bronte Tilbrook Australia | Francesco Tubiello Italy | Guido R. van der Werf Netherlands | Nicolas Vuichard France | Chisato Wada Japan | Rik Wanninkhof USA | Andrew J. Watson UK | David Willis UK | Andrew J. Wiltshire UK | Wenping Yuan China | Chao Yue France | Xu Yue China | Sönke Zaehle Germany | Jiye Zeng Japan
Atlas Team Members at LSCE, France
P Ciais | A Peregon | P Brockmann
Communications Team
Davies | A Morrison | C Bartman | N Hawtin | K Mansell
Data Access and Additional Resources
More information, data sources and data files:
http://www.globalcarbonproject.org/carbonbudget Contact: Pep.Canadell@csiro.au
More information, data sources and data files:
(co-funded in part by BNP Paribas Foundation)
Contact: philippe.ciais@lsce.ipsl.fr
Download of figures and data
Figures and data for most slides available from tinyurl.com/GCB21figs
Global Carbon Budget
Additional country figures
All the data is shown in billion tonnes CO2 (GtCO2)
1 Gigatonne (Gt) = 1 billion tonnes = 1×1015g = 1 Petagram (Pg)
1 kg carbon (C) = 3.664 kg carbon dioxide (CO2)
1 GtC = 3.664 billion tonnes CO2 = 3.664 GtCO2
(Figures in units of GtC and GtCO2 are available from http://globalcarbonbudget.org/carbonbudget)
Most figures in this presentation are available for download as PNG, PDF and SVG files�from tinyurl.com/GCB21figs along with the data required to produce them.
Disclaimer
The Global Carbon Budget and the information presented here are intended for those interested in learning about the carbon cycle, and how human activities are changing it. The information contained herein is provided as a public service, with the understanding that the Global Carbon Project team make no warranties, either expressed or implied, concerning the accuracy, completeness, reliability, or suitability of the information.
License
Our intention is that these figures and data are used. That’s why they’re released under the Creative Commons Attribution 4.0 International license. Simply put, you may freely copy and modify these figures and data, and use them in both commercial and non-commercial works, as long as you give credit to the Global Carbon Project.
If you’re just tweeting a figure or using a figure in a presentation, then it already says at the bottom that it’s by the Global Carbon Project, so you’re good to go! If you use the data directly or modify the figure then you will need to make sure the attribution is in place.
For details on the license, visit the Creative Commons website.
Suggested citation for use in a book: “Used with permission of the Global Carbon Project under the Creative Commons Attribution 4.0 International license.”
Atmospheric CO2 concentration
The global CO2 concentration increased from ~277 ppm in 1750 to 415 ppm in 2021 (up 49%)
Globally averaged surface atmospheric CO2 concentration. Data from: NOAA-ESRL after 1980;
the Scripps Institution of Oceanography before 1980�Source: NOAA-ESRL; Scripps Institution of Oceanography; Friedlingstein et al 2021; Global Carbon Project 2021
Anthropogenic perturbation of the global carbon cycle
Perturbation of the global carbon cycle caused by anthropogenic activities,�global annual average for the decade 2011–2020 (GtCO2/yr)
The budget imbalance is the difference between the estimated emissions and sinks. �Source: NOAA-ESRL; Friedlingstein et al 2021; Canadell et al 2021 (IPCC AR6 WG1 Chapter 5); Global Carbon Project 2021
Key Highlights in 2021
Summary of fossil CO2 emissions in 2020 and 2021
*IAS: Emissions from use of international aviation and maritime shipping bunker fuels are not usually included in national totals�Source: Friedlingstein et al 2021; Global Carbon Project 2021
Region / Country | 2020 emissions (billion tonnes/yr) | 2020 growth (percent) | 2021 projected emissions growth�(percent) | 2021 projected emissions�(billion tonnes/yr) |
China | 10.7 | 1.4% | 4.0% | 11.1 |
USA | 4.7 | -10.6% | 7.6% | 5.1 |
EU27 | 2.6 | -10.9% | 7.6% | 2.8 |
India | 2.4 | -7.3% | 12.6% | 2.7 |
All others (incl. IAS*) | 14.4 | -7.0% | 2.9% | 14.8 |
World (incl. IAS*) | 34.8 | -5.4% | 4.9% | 36.4 |
Global Fossil CO2 Emissions
Global fossil CO2 emissions: 34.8 ± 2 GtCO2 in 2020, 53% over 1990� Projection for 2021: 36.4 ± 2 GtCO2, 4.9% [4.1%–5.7%] higher than 2020
The 2021 projection is based on preliminary data and modelling.�Source: Friedlingstein et al 2021; Global Carbon Project 2021
Uncertainty is ±5% for one standard deviation (IPCC “likely” range)
Emissions Projections for 2021
Global fossil CO2 emissions are projected to increase by 4.9% [4.1%–5.7%] in 2021
�The 2021 projections are based on preliminary data and modelling. �Source: Friedlingstein et al 2021; Global Carbon Project 2021
Fossil CO2 emissions growth: 2019–2021
Emissions are expected to increase in most countries in 2021, with the largest increase in China, USA, and India
Figure shows the top four countries contributing to emissions changes�Source: Friedlingstein et al 2021; Global Carbon Project 2021
Forecast of global atmospheric CO2 concentration
The global atmospheric CO2 concentration is forecast to average 415 parts per million (ppm) in 2021, increasing by 2.0 ppm
Mauna Loa atmospheric CO2
Atmospheric CO2 concentration increased every single year,�including in 2020, despite the drop in fossil fuel emissions, because of continued emissions
Source: Tans and Keeling (2020); Friedlingstein et al 2021; Global Carbon Budget 2021
Fossil CO2 Emissions by country
Global Fossil CO2 Emissions
Global fossil CO2 emissions have risen steadily over the last decades.�Emissions in 2021 are set to rebound towards their pre-COVID-19 levels after an unprecedented drop in 2020.
The 2021 projection is based on preliminary data and modelling.�Source: Friedlingstein et al 2021; Global Carbon Project 2021
Top emitters: Fossil CO2 Emissions to 2020
The top six emitters in 2020 covered 66% of global emissions�China 31%, United States 14%, EU27 7%, India 7%, Russia 5%, and Japan 3%
International aviation and maritime shipping (bunker fuels) contributed 2.9% of global emissions in 2020.�Source: Friedlingstein et al 2021; Global Carbon Project 2021
Top emitters: Fossil CO2 Emissions per capita to 2020
Countries have a broad range of per capita emissions reflecting their national circumstances
Fossil Fuel emissions — Kaya decomposition
Globally, decarbonisation and declines in energy per GDP are largely responsible for the reduced growth rate in emissions over the last decade. 2020 is a clear outlier with a severe decline in GDP.
Key statistics for emissions in 2020
| Emissions 2020 | ||||
Region/Country | Per capita | Total | Growth 2019–20 | ||
tCO2 per person | GtCO2 | % | GtCO2 | % | |
Global (including bunkers) | 4.5 | 34.81 | 100 | -1.895 | -5.4 |
| OECD Countries | ||||
OECD | 8.4 | 11.05 | 31.7 | -1.185 | -9.9 |
USA | 14.2 | 4.71 | 13.5 | -0.543 | -10.6 |
OECD Europe | 5.8 | 2.86 | 8.2 | -0.347 | -11.1 |
Japan | 8.1 | 1.03 | 3.0 | -0.075 | -7.1 |
South Korea | 11.7 | 0.60 | 1.7 | -0.050 | -8.0 |
Canada | 14.2 | 0.54 | 1.5 | -0.047 | -8.2 |
| Non-OECD Countries | ||||
Non-OECD | 3.5 | 22.76 | 65.4 | -0.457 | -2.2 |
China | 7.4 | 10.67 | 30.6 | 0.178 | 1.4 |
India | 1.8 | 2.44 | 7.0 | -0.184 | -7.3 |
Russia | 10.8 | 1.58 | 4.5 | -0.102 | -6.3 |
Iran | 8.9 | 0.75 | 2.1 | 0.012 | 1.3 |
Indonesia | 18.0 | 0.63 | 1.8 | 0.003 | 0.2 |
| International Bunkers | ||||
Bunkers | - | 1.00 | 2.9 | -0.254 | -20.2 |
Fossil CO2 Emissions by source
Fossil CO2 Emissions by source
Share of global fossil CO2 emissions in 2020: coal (40%), oil (32%), gas (21%), cement (5%), flaring and others (2%, not shown)
Projection by fuel type is based on monthly data (GCP analysis)
Fossil CO2 emissions growth: 2019–2021
Global emissions in 2020 dropped across all categories.�In 2021 coal and natural gas have more than recovered this loss, while oil still lags with from subdued transportation.
Fossil CO2 Emissions by source
Emissions by category from 2000 to 2020, with growth rates indicated for the more recent period of 2015 to 2020�Coal use has declined since 2014, and both coal and oil declined sharply in the pandemic year 2020
Source: CDIAC; Global Carbon Project 2021
Fossil CO2 Emission by source for top emitters�
Fossil CO2 Emissions in China
Annual emissions in China are expected to reach another record high in 2021, with substantial industrial growth
Fossil CO2 Emissions in USA
The USA’s emissions from coal are expected to bounce back in 2021, partly as a result of supply constraints on natural gas. Emissions from oil do not return to 2019’s level.
Fossil CO2 Emissions in the European Union
In the first half of 2021 EU coal power generation was strong due partly to very low generation from wind power, but the 2021 total is expected to remain below 2019’s level and continue to decline.
Fossil CO2 Emissions in India
India’s emissions are expected to jump sharply in 2021, returning to a strongly growing trend driven largely by use of coal in power generation.
Fossil CO2 Emissions in Rest of World
In the Rest of the World, emissions from coal and natural gas are expected to recover most of their losses in 2020.�Oil, which here includes internationship transport, remains subdued.
The Rest of the World is the global total less China, US, EU, and India. It also includes international aviation and maritime shipping.�Source: Friedlingstein et al 2021; Global Carbon Project 2021
Cement carbonation sink
The production of cement results in ‘process’ emissions of CO2 from the chemical reaction�During its lifetime, cement slowly absorbs CO2 from the atmosphere
Energy use by source
Energy use by source
Consumption of energy from fossil sources declined in 2020.�Renewable energy continued to grow, but needs to grow even faster to replace fossil energy consumption.
This figure shows “primary energy” using the BP substitution method�(non-fossil sources are scaled up by an assumed fossil efficiency of approximately 0.38)�Source: BP 2021; Global Carbon Project 2021
Energy use by source
Energy consumption by fuel source from 2000 to 2020, with growth rates �indicated for the more recent period of 2015 to 2020
This figure shows “primary energy” using the BP substitution method�(non-fossil sources are scaled up by an assumed fossil efficiency of approximately 0.38)�Source: BP 2020; Global Carbon Project 2021
Energy use in China
Coal consumption in energy units has returned to peak levels, �while consumption of all other energy sources is growing strongly
Source: BP 2020; Global Carbon Project 2021
Energy use in USA
Coal consumption has declined sharply in recent years with the shale gas boom
and strong renewables growth. Output from nuclear power is slowly declining as stations are retired.
Source: BP 2020; Global Carbon Project 2021
Energy use in the European Union
Consumption of both oil and gas has rebounded in recent years, while coal continues to decline.
Renewables are growing strongly, now providing more energy than nuclear power.
Source: BP 2020; Global Carbon Project 2021
Energy use in India
Pandemic year 2020 has interrupted India’s strong growth in energy consumption.�Consumption of coal and oil dominate.
Source: BP 2020; Global Carbon Project 2021
Land-use Change Emissions
Land-use change emissions
Land-use change emissions are 4.1 ± 2.6 GtCO2 for 2011-2020, and show a negative trend in the last two decades, but estimates are still highly uncertain.
Estimates from three bookkeeping models�Source: Friedlingstein et al 2021; Global Carbon Project 2021
Indonesian fires
Net land-use emissions are the difference between CO2 emissions, primarily from deforestation, and CO2 removals, primarily from abandonment of agricultural land
(14.1 ± 2.2 GtCO2)
(9.9 ± 1.4 GtCO2)
Gross emissions
(2011-2020:
14.1 ± 2.2 GtCO2/yr)
Gross removals
(2011-2020:
9.9 ± 1.4 GtCO2/yr)
Total global emissions
Total global emissions: 38.0 ± 3.1 GtCO2 in 2020, 40% over 1990�Percentage land-use change: 42% in 1960, 10% averaged 2011–2020
Land-use change estimates from three bookkeeping models, using fire-based variability from 1997�Source: Friedlingstein et al 2021; Global Carbon Project 2021
Closing the Global Carbon Budget
Fate of anthropogenic CO2 emissions (2011–2020)
29%
11.2 GtCO2/yr
26%
10.2 GtCO2/yr
34.8 GtCO2/yr
89%
11%
4.1 GtCO2/yr
18.6 GtCO2/yr
48%
Sources = Sinks
3%
-1.0 GtCO2/yr
Budget Imbalance: �(the difference between estimated sources & sinks)
Global carbon budget
Carbon emissions are partitioned among the atmosphere and carbon sinks on land and in the ocean�The “imbalance” between total emissions and total sinks is an active area of research
Changes in the budget over time
The sinks have continued to grow with increasing emissions, but climate change will affect�carbon cycle processes in a way that will exacerbate the increase of CO2 in the atmosphere
The budget imbalance is the total emissions minus the estimated growth in the atmosphere, land and ocean.
It reflects the limits of our understanding of the carbon cycle.
Source: Friedlingstein et al 2021; Global Carbon Project 2021
Global carbon budget
Fossil emissions dominate in the Northern Hemisphere, while land-use emissions are important in the tropics.�The North Atlantic and Southern Ocean are carbon sinks while the tropical ocean is a source of CO2.�Tropical, temperate and boreal forest are the main terrestrial carbon sinks
CO2 Source
CO2 Sink
CO2 Source
CO2 Sink
CO2 Source
CO2 Source
CO2 Sink
Atmospheric concentration
The atmospheric concentration growth rate has increased steadily.�The high growth in 1987, 1998, & 2015–16 reflect a strong El Niño, which weakens the land sink.
Projected 2021
Airborne Fraction
The airborne fraction is the proportion of the total annual CO2 emissions that remains in the atmosphere.
The rest of CO2 emissions are removed by the land and ocean sinks.�Around 45% of CO2 emissions remain in the atmosphere despite sustained growth in CO2 emissions.
Source: NOAA-ESRL; Global Carbon Project 2021
Ocean sink
The ocean carbon sink, estimated by Global Ocean Biogeochemical Models and observation-based data products, �continues to increase 10.2 ± 1.5 GtCO2/yr for 2011–2020 and 11.0 ± 1.5 GtCO2/yr in 2020
Terrestrial sink
The land carbon sink, estimated by Dynamic Global Vegetation Models, was 11.2 ± 2.2 GtCO2/yr �during 2011–2020 and 10.7 ± 3.6 GtCO2/yr in 2020.�Total CO2 fluxes on land (including land-use change) are also constrained by atmospheric inversions.
Land and ocean sinks — Effects of CO2 vs climate change
Process models suggest that increasing atmospheric CO2 drives the land and ocean sinks while climate change reduces the carbon sinks; the climate effect is largest in tropical and semi-arid land ecosystems.�Globally during the 2011-2020 decade, climate change reduced the land sink by ~15% and the ocean sink by ~5%
CO2 Source
CO2 Sink
Land and ocean sinks — Estimates from atmospheric inversions
Atmospheric CO2 inversions allow to estimate the land and ocean carbon fluxes, independently from the land and ocean process-based models estimates, confirming the global carbon budget estimates of the land and ocean partitioning of anthropogenic CO2
CO2 Sink
CO2 Source
CO2 Sink
Total land and ocean fluxes
Total land and ocean fluxes show more interannual variability in the tropics
Remaining carbon budget imbalance
The budget imbalance is the carbon left after adding independent estimates for total emissions, minus the�atmospheric growth rate and estimates for the land and ocean carbon sinks using models constrained by observations
Source: Friedlingstein et al 2021; Global Carbon Project 2021
Large and unexplained variability in the global carbon balance caused by uncertainty�and understanding hinder independent verification of reported CO2 emissions
positive values mean overestimated emissions and/or underestimated sinks
Global carbon budget
The cumulative contributions to the global carbon budget from 1850�The carbon imbalance represents the gap in our current understanding of sources & sinks
Remaining carbon budget
The remaining carbon budget to limit global warming to 1.5°C , 1.7°C and 2°C is �420 GtCO2, 770 GtCO2, and 1270 GtCO2 respectively, equivalent to 11, 20 and 32 years from 2022.�2475 GtCO2 have been emitted since 1750
Quantities are subject to [additional] uncertainties e.g., future mitigation choices of non-CO2 emissions
Source: IPCC AR6 WG1; Friedlingstein et al 2021; Global Carbon Budget 2021
Infographics
Infographic
Acknowledgements
Acknowledgements
The work presented in the Global Carbon Budget 2021 has been possible thanks to the contributions of hundreds of people involved in observational networks, modeling, and synthesis efforts.
We thank the institutions and agencies that provide support for individuals and funding that enable the collaborative effort of bringing all components together in the carbon budget effort.
We thank the sponsors of the GCP and GCP support and liaison offices.
We also want thank the EU/H2020 projects 4C (821003) and VERIFY (776810) that supported this coordinated effort as well as each of the many funding agencies that supported the individual components of this release. A full list in provided in Table A9 of Friedlingstein et al. 2021.
https://essd.copernicus.org/preprints/essd-2021-386/
We also thanks the Fondation BNP Paribas for supporting the Global Carbon Atlas and the Integrated Carbon Observation System (ICOS) for hosting our data.
This presentation was created by Robbie Andrew and Pierre Friedlingstein with Pep Canadell, Glen Peters and Corinne Le Quéré in support of the international carbon research community.
Additional Figures
Additional Figures�Fossil CO2
Top emitters: Fossil CO2 Emissions
Emissions by country from 2000 to 2020, with the growth rates �indicated for the more recent period of 2015 to 2020
Per capita CO2 emissions
Fossil CO2 emission intensity
Global CO2 emissions growth has generally resumed quickly from global crises.�Emission intensity has steadily declined but not sufficiently to offset economic growth.
Economic activity is measured in purchasing power parity (PPP) terms in 2010 US dollars.
Source: Friedlingstein et al 2021; Global Carbon Project 2021
Top emitters: Fossil CO2 Emission Intensity
Emission intensity (emission per unit economic output) generally declines over time.�In many countries, these declines are insufficient to overcome economic growth.
GDP is measured in purchasing power parity (PPP) terms in 2010 US dollars.
Source: Friedlingstein et al 2021; Global Carbon Project 2021
Kaya decomposition
The Kaya decomposition illustrates that relative decoupling of economic growth from CO2 emissions �is driven by improved energy intensity (Energy/GDP)
GDP: Gross Domestic Product (economic activity)�Source: Friedlingstein et al 2021; Global Carbon Project 2021
Fossil CO2 emission intensity
The 10 largest economies have a wide range of emission intensity of economic activity
Emission intensity: Fossil CO2 emissions divided by Gross Domestic Product (GDP)�Source: Friedlingstein et al 2021; Global Carbon Project 2021
Fossil CO2 Emissions per capita
The 10 most populous countries span a wide range of development and emissions per capita
Emission per capita: Fossil CO2 emissions divided by population�Source: Friedlingstein et al 2021; Global Carbon Project 2021
Alternative rankings of countries
The responsibility of individual countries depends on perspective.�Bars indicate fossil CO2 emissions, population, and GDP.
GDP: Gross Domestic Product in Market Exchange Rates (MER) and Purchasing Power Parity (PPP)�Source: United Nations; Friedlingstein et al 2021; Global Carbon Project 2021
Breakdown of global fossil CO2 emissions by country
Fossil CO2 emissions by continent
Asia dominates global fossil CO2 emissions, while emissions in North America�are of similar size to those in Europe, and the Middle East is growing rapidly.
Fossil CO2 emissions by continent: per capita
Oceania and North America have the highest per capita emissions, while the Middle East has recently overtaken Europe. �Africa has by far the lowest emissions per capita.
Additional Figures�Consumption-based Emissions
Consumption–based emissions allocate emissions to the location that goods and services are consumed
Consumption-based emissions = Production/Territorial-based emissions minus emissions embodied in exports plus the emissions embodied in imports
Consumption-based emissions (carbon footprint)
Allocating fossil CO2 emissions to consumption provides an alternative perspective.�USA and EU28 are net importers of embodied emissions, China and India are net exporters.
Consumption-based emissions are calculated by adjusting the
standard production-based emissions to account for international trade�Source: Peters et al 2011; Friedlingstein et al 2021; Global Carbon Project 2019
Consumption-based emissions per person
The differences between fossil CO2 emissions per capita is larger than the�differences between consumption and territorial emissions.
Consumption-based emissions are calculated by adjusting the
standard production-based emissions to account for international trade�Source: Peters et al 2011; Friedlingstein et al 2021; Global Carbon Project 2019
Consumption-based emissions (carbon footprint)
Transfers of emissions embodied in trade between OECD and non-OECD countries grew�slowly during the 2000’s, but has since slowly declined.
Major flows from production to consumption
Flows from location of generation of emissions to location of�consumption of goods and services
Values for 2011. EU is treated as one region. Units: MtCO2�Source: Peters et al 2012
Major flows from extraction to consumption
Flows from location of fossil fuel extraction to location of�consumption of goods and services
Values for 2011. EU is treated as one region. Units: MtCO2�Source: Andrew et al 2013
Additional Figures�Historical Emissions
Total global emissions by source
Land-use change was the dominant source of annual CO2 emissions until around 1950.�Fossil CO2 emissions now dominate global changes.
Others: Emissions from gas flaring and carbonate decomposition�Source: Friedlingstein et al 2021; Global Carbon Project 2021
Historical cumulative emissions by source
Others: Emissions from gas flaring and carbonate decomposition�Source: Friedlingstein et al 2021; Global Carbon Project 2021
Historical cumulative fossil CO2 emissions by country
‘All others’ includes all other countries along with emissions from international aviation and maritime shipping�Source: Friedlingstein et al 2021; Global Carbon Project 2021
Historical cumulative emissions by continent
Cumulative fossil CO2 emissions (1850–2020). North America and Europe have �contributed the most cumulative emissions, but Asia is growing fast
The figure excludes emissions from international aviation and maritime shipping�Source: Friedlingstein et al 2021; Global Carbon Project 2021