The Orbiting Carbon Observatory (OCO-2) tracks 2-3 peta-gram increase in carbon release to the atmosphere during the 2014-2016 El Niño
dc.contributor.author | Patra, P.K. | |
dc.contributor.author | Crisp, D. | |
dc.contributor.author | Kaiser, J.W. | |
dc.contributor.author | Wunch, D. | |
dc.contributor.author | Saeki, T. | |
dc.contributor.author | Ichii, K. | |
dc.contributor.author | Sekiya, T. | |
dc.contributor.author | Wennberg, P.O. | |
dc.contributor.author | Feist, D.G. | |
dc.contributor.author | Pollard, D.F. | |
dc.contributor.author | Griffith, D.W.T. | |
dc.contributor.author | Velazco, V.A. | |
dc.contributor.author | De Maziere, M. | |
dc.contributor.author | Sha, M.K. | |
dc.contributor.author | Roehl, C. | |
dc.contributor.author | Chatterjee, A. | |
dc.contributor.author | Ishijima, K. | |
dc.date | 2017 | |
dc.date.accessioned | 2017-11-24T13:04:16Z | |
dc.date.available | 2017-11-24T13:04:16Z | |
dc.identifier.uri | https://orfeo.belnet.be/handle/internal/6315 | |
dc.description | The powerful El Niño event of 2015–2016 – the third most intense since the 1950s – has exerted a large impact on the Earth’s natural climate system. The column-averaged CO2 dry-air mole fraction (XCO2) observations from satellites and ground-based networks are analyzed together with in situ observations for the period of September 2014 to October 2016. From the differences between satellite (OCO-2) observations and simulations using an atmospheric chemistry-transport model, we estimate that, relative to the mean annual fluxes for 2014, the most recent El Niño has contributed to an excess CO2 emission from the Earth’s surface (land + ocean) to the atmosphere in the range of 2.4 ± 0.2 PgC (1 Pg = 1015 g) over the period of July 2015 to June 2016. The excess CO2 flux is resulted primarily from reduction in vegetation uptake due to drought, and to a lesser degree from increased biomass burning. It is about the half of the CO2 flux anomaly (range: 4.4–6.7 PgC) estimated for the 1997/1998 El Niño. The annual total sink is estimated to be 3.9 ± 0.2 PgC for the assumed fossil fuel emission of 10.1 PgC. The major uncertainty in attribution arise from error in anthropogenic emission trends, satellite data and atmospheric transport. | |
dc.language | eng | |
dc.title | The Orbiting Carbon Observatory (OCO-2) tracks 2-3 peta-gram increase in carbon release to the atmosphere during the 2014-2016 El Niño | |
dc.type | Article | |
dc.subject.frascati | Earth and related Environmental sciences | |
dc.audience | Scientific | |
dc.source.title | Scientific Reports | |
dc.source.volume | 7 | |
dc.source.page | A13567 | |
Orfeo.peerreviewed | Yes | |
dc.identifier.doi | 10.1038/s41598-017-13459-0 |