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Error Budget of the MEthane Remote LIdar missioN and Its Impact on the Uncertainties of the Global Methane Budget

Bousquet, Philippe and Pierangelo, Clémence and Bacour, Cédric and Marshall, Julia and Peylin, Philippe and Ayar, Pradeebane V. and Ehret, Gerhard and Bréon, François-Marie and Chevallier, Frédéric and Crevoisier, Cyril and Gibert, Fabien and Rairoux, Patrick and Kiemle, Christoph and Armante, Raymond and Bès, Caroline and Cassé, Vincent and Chinaud, Jordi and Chomette, Olivier and Delahaye, Thibault and Edouart, Dimitri and Estève, Frédéric and Fix, Andreas and Friker, Achim and Klonecki, Andrzej and Wirth, Martin and Alpers, Mathias and Millet, Bruno (2018) Error Budget of the MEthane Remote LIdar missioN and Its Impact on the Uncertainties of the Global Methane Budget. Journal of Geophysical Research: Atmospheres, 123 (20), pp. 11766-11785. Wiley. doi: 10.1029/2018JD028907. ISSN 2169-897X.

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Official URL: http://dx.doi.org/10.1029/2018JD028907


MEthane Remote LIdar missioN (MERLIN) is a German-French space mission, scheduled for launch in 2024 and built around an innovative light detecting and ranging instrument that will retrieve methane atmospheric weighted columns. MERLIN products will be assimilated into chemistry transport models to infer methane emissions and sinks. Here the expected performance of MERLIN to reduce uncertainties on methane emissions is estimated. A first complete error budget of the mission is proposed based on an analysis of the plausible causes of random and systematic errors. Systematic errors are spatially and temporally distributed on geophysical variables and then aggregated into an ensemble of 32 scenarios. Observing System Simulation Experiments are conducted, originally carrying both random and systematic errors. Although relatively small (±2.9 ppb), systematic errors are found to have a larger influence on MERLIN performances than random errors. The expected global mean uncertainty reduction on methane emissions compared to the prior knowledge is found to be 32%, limited by the impact of systematic errors. The uncertainty reduction over land reaches 60% when the largest desert regions are removed. At the latitudinal scale, the largest uncertainty reductions are achieved for temperate regions (84%) and then tropics (56%) and high latitudes (53%). Similar Observing System Simulation Experiments based on error scenarios for Greenhouse Gases Observing SATellite reveal that MERLIN should perform better than Greenhouse Gases Observing SATellite for most continental regions. The integration of error scenarios for MERLIN in another inversion system suggests similar results, albeit more optimistic in terms of uncertainty reduction.

Item URL in elib:https://elib.dlr.de/123626/
Document Type:Article
Title:Error Budget of the MEthane Remote LIdar missioN and Its Impact on the Uncertainties of the Global Methane Budget
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Bousquet, PhilippeUniv. Paris Saclay, Gif sur Yvette, FrankreichUNSPECIFIEDUNSPECIFIED
Pierangelo, ClémenceCNES, Toulouse, FrankreichUNSPECIFIEDUNSPECIFIED
Bacour, CédricNoveltis,, Labège, FrankreichUNSPECIFIEDUNSPECIFIED
Marshall, JuliaMPI Biogeochemie, JenaUNSPECIFIEDUNSPECIFIED
Peylin, PhilippeUniv. Paris Saclay, Gif sur Yvette, FrankreichUNSPECIFIEDUNSPECIFIED
Ayar, Pradeebane V.Univ. Paris Saclay, Gif sur Yvette, FrankreichUNSPECIFIEDUNSPECIFIED
Bréon, François-MarieUniv. Paris Saclay, Gif sur Yvette, FrankreichUNSPECIFIEDUNSPECIFIED
Chevallier, FrédéricUniv. Paris Saclay, Gif sur Yvette, FrankreichUNSPECIFIEDUNSPECIFIED
Crevoisier, CyrilLMD, Palaiseau, FrankreichUNSPECIFIEDUNSPECIFIED
Gibert, FabienLMD, Palaiseau, FrankreichUNSPECIFIEDUNSPECIFIED
Rairoux, PatrickUniv. Lyon, Villeurbanne, FrankreichUNSPECIFIEDUNSPECIFIED
Armante, RaymondLMD, Palaiseau, FrankreichUNSPECIFIEDUNSPECIFIED
Bès, CarolineCNES, Toulouse, FrankreichUNSPECIFIEDUNSPECIFIED
Cassé, VincentLMD, Palaiseau, FrankreichUNSPECIFIEDUNSPECIFIED
Chinaud, JordiCNES, Toulouse, FrankreichUNSPECIFIEDUNSPECIFIED
Chomette, OlivierLMD, Palaiseau, FrankreichUNSPECIFIEDUNSPECIFIED
Delahaye, ThibaultLMD, Palaiseau, FrankreichUNSPECIFIEDUNSPECIFIED
Edouart, DimitriLMD, Palaiseau, FrankreichUNSPECIFIEDUNSPECIFIED
Estève, FrédéricCNES, Toulouse, FrankreichUNSPECIFIEDUNSPECIFIED
Klonecki, AndrzejNoveltis,, Labège, FrankreichUNSPECIFIEDUNSPECIFIED
Millet, BrunoCNES, Toulouse, FrankreichUNSPECIFIEDUNSPECIFIED
Date:27 October 2018
Journal or Publication Title:Journal of Geophysical Research: Atmospheres
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 11766-11785
Keywords:Impact study, space-based Lidar, MERLIN, global methane budget
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - LIDAR research and development
Location: Bonn-Oberkassel , Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Space Administration
Deposited By: Ehret, Gerhard
Deposited On:23 Nov 2018 11:42
Last Modified:28 Feb 2023 14:55

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