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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

Abstract

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
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bousquet, PhilippeUniv. Paris Saclay, Gif sur Yvette, FrankreichUNSPECIFIED
Pierangelo, ClémenceCNES, Toulouse, FrankreichUNSPECIFIED
Bacour, CédricNoveltis,, Labège, FrankreichUNSPECIFIED
Marshall, JuliaMPI Biogeochemie, JenaUNSPECIFIED
Peylin, PhilippeUniv. Paris Saclay, Gif sur Yvette, FrankreichUNSPECIFIED
Ayar, Pradeebane V.Univ. Paris Saclay, Gif sur Yvette, FrankreichUNSPECIFIED
Ehret, GerhardDLR, IPAUNSPECIFIED
Bréon, François-MarieUniv. Paris Saclay, Gif sur Yvette, FrankreichUNSPECIFIED
Chevallier, FrédéricUniv. Paris Saclay, Gif sur Yvette, FrankreichUNSPECIFIED
Crevoisier, CyrilLMD, Palaiseau, FrankreichUNSPECIFIED
Gibert, FabienLMD, Palaiseau, FrankreichUNSPECIFIED
Rairoux, PatrickUniv. Lyon, Villeurbanne, FrankreichUNSPECIFIED
Kiemle, ChristophDLR, IPAUNSPECIFIED
Armante, RaymondLMD, Palaiseau, FrankreichUNSPECIFIED
Bès, CarolineCNES, Toulouse, FrankreichUNSPECIFIED
Cassé, VincentLMD, Palaiseau, FrankreichUNSPECIFIED
Chinaud, JordiCNES, Toulouse, FrankreichUNSPECIFIED
Chomette, OlivierLMD, Palaiseau, FrankreichUNSPECIFIED
Delahaye, ThibaultLMD, Palaiseau, FrankreichUNSPECIFIED
Edouart, DimitriLMD, Palaiseau, FrankreichUNSPECIFIED
Estève, FrédéricCNES, Toulouse, FrankreichUNSPECIFIED
Fix, AndreasDLR, IPAUNSPECIFIED
Friker, AchimDLR, RDUNSPECIFIED
Klonecki, AndrzejNoveltis,, Labège, FrankreichUNSPECIFIED
Wirth, MartinDLR, IPAUNSPECIFIED
Alpers, MathiasDLR, RDUNSPECIFIED
Millet, BrunoCNES, Toulouse, FrankreichUNSPECIFIED
Date:27 October 2018
Journal or Publication Title:JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:123
DOI :10.1029/2018JD028907
Page Range:pp. 11766-11785
Publisher:Wiley
ISSN:2169-897X
Status:Published
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 - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben LIDAR-Forschung und -Entwicklung
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:26 May 2020 23:05

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