Teoh, Roger;
Engberg, Zebediah;
Shapiro, Marc;
Dray, Lynnette;
Stettler, Marc EJ;
(2023)
A high-resolution Global Aviation emissions Inventory based on ADS-B (GAIA) for 2019–2021.
Atmospheric Chemistry and Physics
, 24
pp. 725-744.
10.5194/acp-24-725-2024.
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Abstract
Aviation emissions that are dispersed into the Earth's atmosphere affect the climate and air pollution, with significant spatiotemporal variation owing to heterogeneous aircraft activity. In this paper, we use historical flight trajectories derived from Automatic Dependent Surveillance–Broadcast (ADS-B) telemetry and reanalysis weather data for 2019–2021 to develop the Global Aviation emissions inventory based on ADS-B (GAIA). In 2019, 40.2 million flights collectively travelled 61 billion kilometres using 283 Tg of fuel, leading to CO2, NOX, non-volatile particulate matter (nvPM) mass and number emissions of 893 Tg, 4.49 Tg, 21.4 Gg, and 2.8×1026, respectively. Global responses to COVID-19 led to reductions in the annual flight distance flown, CO2, and NOX emissions in 2020 (-43%, -48% and -50%, respectively relative to 2019) and 2021 (-31%, -41% and -43%, respectively) with significant regional variability. Short-haul flights with duration < 3 h accounted for 83% of all flights, yet only for 35% of the 2019 CO2 emissions, while long-haul flights with duration > 6 h (5% of all flights) were responsible for 43% of CO2 and 49% of NOX emissions. Globally, actual flight trajectories flown are, on average, ~5% greater than the great-circle path between the origin-destination airport but this varies by region and flight distance. An evaluation of 8,705 unique flights between London and Singapore showed large variabilities in the flight trajectory profile, fuel consumption and emission indices. GAIA captures the spatiotemporal distribution of aviation activity and emissions and is provided for use in future studies to evaluate the negative externalities arising from global aviation.
| Type: | Article |
|---|---|
| Title: | A high-resolution Global Aviation emissions Inventory based on ADS-B (GAIA) for 2019–2021 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.5194/acp-24-725-2024 |
| Publisher version: | https://doi.org/10.5194/acp-24-725-2024 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment > Bartlett School Env, Energy and Resources |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10177187 |
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